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Fix the double-barreled homophone attack #91

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Ulexus
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@Ulexus Ulexus commented Apr 23, 2014

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@Elizafox
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Elizafox commented Jan 8, 2015

@Ulexus A really minor docs change that fixes something slightly irritating, and should be upstreamed, but there's just one problem. Linus doesn't accept pull requests on github, so send them to the appropriate maintainer.

jdenson12 pushed a commit to jdenson12/linux that referenced this pull request Sep 10, 2015
0day-ci pushed a commit to 0day-ci/linux that referenced this pull request Apr 15, 2016
This adds test cases mostly around ARG_PTR_TO_RAW_STACK to check the
verifier behaviour.

  [...]
  torvalds#84 raw_stack: no skb_load_bytes OK
  torvalds#85 raw_stack: skb_load_bytes, no init OK
  torvalds#86 raw_stack: skb_load_bytes, init OK
  torvalds#87 raw_stack: skb_load_bytes, spilled regs around bounds OK
  torvalds#88 raw_stack: skb_load_bytes, spilled regs corruption OK
  torvalds#89 raw_stack: skb_load_bytes, spilled regs corruption 2 OK
  torvalds#90 raw_stack: skb_load_bytes, spilled regs + data OK
  torvalds#91 raw_stack: skb_load_bytes, invalid access 1 OK
  torvalds#92 raw_stack: skb_load_bytes, invalid access 2 OK
  torvalds#93 raw_stack: skb_load_bytes, invalid access 3 OK
  torvalds#94 raw_stack: skb_load_bytes, invalid access 4 OK
  torvalds#95 raw_stack: skb_load_bytes, invalid access 5 OK
  torvalds#96 raw_stack: skb_load_bytes, invalid access 6 OK
  torvalds#97 raw_stack: skb_load_bytes, large access OK
  Summary: 98 PASSED, 0 FAILED

Signed-off-by: Daniel Borkmann <[email protected]>
Acked-by: Alexei Starovoitov <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
0day-ci pushed a commit to 0day-ci/linux that referenced this pull request Aug 12, 2016
I ran into this:

    ================================================================================
    UBSAN: Undefined behaviour in kernel/time/hrtimer.c:310:16
    signed integer overflow:
    9223372036854775807 + 50000 cannot be represented in type 'long long int'
    CPU: 2 PID: 4798 Comm: trinity-c2 Not tainted 4.8.0-rc1+ torvalds#91
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.3-0-ge2fc41e-prebuilt.qemu-project.org 04/01/2014
     0000000000000000 ffff88010ce6fb88 ffffffff82344740 0000000041b58ab3
     ffffffff84f97a20 ffffffff82344694 ffff88010ce6fbb0 ffff88010ce6fb60
     000000000000c350 ffff88010ce6f968 dffffc0000000000 ffffffff857bc320
    Call Trace:
     [<ffffffff82344740>] dump_stack+0xac/0xfc
     [<ffffffff82344694>] ? _atomic_dec_and_lock+0xc4/0xc4
     [<ffffffff8242df78>] ubsan_epilogue+0xd/0x8a
     [<ffffffff8242e6b4>] handle_overflow+0x202/0x23d
     [<ffffffff8242e4b2>] ? val_to_string.constprop.6+0x11e/0x11e
     [<ffffffff8236df71>] ? timerqueue_add+0x151/0x410
     [<ffffffff81485c48>] ? hrtimer_start_range_ns+0x3b8/0x1380
     [<ffffffff81795631>] ? memset+0x31/0x40
     [<ffffffff8242e6fd>] __ubsan_handle_add_overflow+0xe/0x10
     [<ffffffff81488ac9>] hrtimer_nanosleep+0x5d9/0x790
     [<ffffffff814884f0>] ? hrtimer_init_sleeper+0x80/0x80
     [<ffffffff813a9ffb>] ? __might_sleep+0x5b/0x260
     [<ffffffff8148be10>] common_nsleep+0x20/0x30
     [<ffffffff814906c7>] SyS_clock_nanosleep+0x197/0x210
     [<ffffffff81490530>] ? SyS_clock_getres+0x150/0x150
     [<ffffffff823c7113>] ? __this_cpu_preempt_check+0x13/0x20
     [<ffffffff8162ef60>] ? __context_tracking_exit.part.3+0x30/0x1b0
     [<ffffffff81490530>] ? SyS_clock_getres+0x150/0x150
     [<ffffffff81007bd3>] do_syscall_64+0x1b3/0x4b0
     [<ffffffff845f85aa>] entry_SYSCALL64_slow_path+0x25/0x25
    ================================================================================

Add a new ktime_add_unsafe() helper which doesn't check for overflow, but
doesn't throw a UBSAN warning when it does overflow either.

Signed-off-by: Vegard Nossum <[email protected]>
0day-ci pushed a commit to 0day-ci/linux that referenced this pull request Aug 26, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
koct9i pushed a commit to koct9i/linux that referenced this pull request Aug 27, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
0day-ci pushed a commit to 0day-ci/linux that referenced this pull request Sep 1, 2016
I ran into this:

    ================================================================================
    UBSAN: Undefined behaviour in kernel/time/hrtimer.c:310:16
    signed integer overflow:
    9223372036854775807 + 50000 cannot be represented in type 'long long int'
    CPU: 2 PID: 4798 Comm: trinity-c2 Not tainted 4.8.0-rc1+ torvalds#91
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.3-0-ge2fc41e-prebuilt.qemu-project.org 04/01/2014
     0000000000000000 ffff88010ce6fb88 ffffffff82344740 0000000041b58ab3
     ffffffff84f97a20 ffffffff82344694 ffff88010ce6fbb0 ffff88010ce6fb60
     000000000000c350 ffff88010ce6f968 dffffc0000000000 ffffffff857bc320
    Call Trace:
     [<ffffffff82344740>] dump_stack+0xac/0xfc
     [<ffffffff82344694>] ? _atomic_dec_and_lock+0xc4/0xc4
     [<ffffffff8242df78>] ubsan_epilogue+0xd/0x8a
     [<ffffffff8242e6b4>] handle_overflow+0x202/0x23d
     [<ffffffff8242e4b2>] ? val_to_string.constprop.6+0x11e/0x11e
     [<ffffffff8236df71>] ? timerqueue_add+0x151/0x410
     [<ffffffff81485c48>] ? hrtimer_start_range_ns+0x3b8/0x1380
     [<ffffffff81795631>] ? memset+0x31/0x40
     [<ffffffff8242e6fd>] __ubsan_handle_add_overflow+0xe/0x10
     [<ffffffff81488ac9>] hrtimer_nanosleep+0x5d9/0x790
     [<ffffffff814884f0>] ? hrtimer_init_sleeper+0x80/0x80
     [<ffffffff813a9ffb>] ? __might_sleep+0x5b/0x260
     [<ffffffff8148be10>] common_nsleep+0x20/0x30
     [<ffffffff814906c7>] SyS_clock_nanosleep+0x197/0x210
     [<ffffffff81490530>] ? SyS_clock_getres+0x150/0x150
     [<ffffffff823c7113>] ? __this_cpu_preempt_check+0x13/0x20
     [<ffffffff8162ef60>] ? __context_tracking_exit.part.3+0x30/0x1b0
     [<ffffffff81490530>] ? SyS_clock_getres+0x150/0x150
     [<ffffffff81007bd3>] do_syscall_64+0x1b3/0x4b0
     [<ffffffff845f85aa>] entry_SYSCALL64_slow_path+0x25/0x25
    ================================================================================

Add a new ktime_add_unsafe() helper which doesn't check for overflow, but
doesn't throw a UBSAN warning when it does overflow either.

Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Richard Cochran <[email protected]>
Cc: Prarit Bhargava <[email protected]>
Signed-off-by: Vegard Nossum <[email protected]>
Signed-off-by: John Stultz <[email protected]>
0day-ci pushed a commit to 0day-ci/linux that referenced this pull request Sep 2, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
0day-ci pushed a commit to 0day-ci/linux that referenced this pull request Sep 6, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
0day-ci pushed a commit to 0day-ci/linux that referenced this pull request Sep 11, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
0day-ci pushed a commit to 0day-ci/linux that referenced this pull request Sep 12, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
0day-ci pushed a commit to 0day-ci/linux that referenced this pull request Sep 15, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
0day-ci pushed a commit to 0day-ci/linux that referenced this pull request Sep 16, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
0day-ci pushed a commit to 0day-ci/linux that referenced this pull request Sep 20, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
0day-ci pushed a commit to 0day-ci/linux that referenced this pull request Sep 20, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
0day-ci pushed a commit to 0day-ci/linux that referenced this pull request Sep 21, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
0day-ci pushed a commit to 0day-ci/linux that referenced this pull request Sep 21, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
vinceab pushed a commit to vinceab/linux that referenced this pull request Sep 28, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
fengguang pushed a commit to 0day-ci/linux that referenced this pull request Sep 28, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
fengguang pushed a commit to 0day-ci/linux that referenced this pull request Sep 30, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
fengguang pushed a commit to 0day-ci/linux that referenced this pull request Oct 1, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
vinceab pushed a commit to vinceab/linux that referenced this pull request Oct 3, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
fengguang pushed a commit to 0day-ci/linux that referenced this pull request Oct 5, 2016
WARNING: Missing a blank line after declarations
torvalds#91: FILE: mm/swapfile.c:285:
+		unsigned int tail = cluster_next(&list->tail);
+		cluster_set_next(&ci[tail], idx);

WARNING: line over 80 characters
torvalds#261: FILE: mm/swapfile.c:2347:
+			cluster_list_add_tail(&p->free_clusters, cluster_info, idx);

total: 0 errors, 2 warnings, 222 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./patches/mm-swap-add-swap_cluster_list.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Huang Ying <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
fengguang pushed a commit to 0day-ci/linux that referenced this pull request Nov 9, 2016
ERROR: Please use git commit description style 'commit <12+ chars of sha1> ("<title line>")' - ie: 'commit 0123456789ab ("commit description")'
torvalds#16: 
flag.  However, this flag was originally silently dropped by 1e98779

WARNING: line over 80 characters
torvalds#89: FILE: mm/nommu.c:179:
+static long __get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm,

WARNING: line over 80 characters
torvalds#90: FILE: mm/nommu.c:180:
+				      unsigned long start, unsigned long nr_pages,

WARNING: line over 80 characters
torvalds#91: FILE: mm/nommu.c:181:
+			              struct page **pages, unsigned int gup_flags)

ERROR: code indent should use tabs where possible
torvalds#91: FILE: mm/nommu.c:181:
+^I^I^I              struct page **pages, unsigned int gup_flags)$

total: 2 errors, 3 warnings, 116 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

NOTE: Whitespace errors detected.
      You may wish to use scripts/cleanpatch or scripts/cleanfile

./patches/mm-unexport-__get_user_pages_unlocked.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Lorenzo Stoakes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
fengguang pushed a commit to 0day-ci/linux that referenced this pull request Nov 9, 2016
ERROR: Please use git commit description style 'commit <12+ chars of sha1> ("<title line>")' - ie: 'commit 0123456789ab ("commit description")'
torvalds#16:
flag.  However, this flag was originally silently dropped by 1e98779

WARNING: line over 80 characters
torvalds#89: FILE: mm/nommu.c:179:
+static long __get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm,

WARNING: line over 80 characters
torvalds#90: FILE: mm/nommu.c:180:
+				      unsigned long start, unsigned long nr_pages,

WARNING: line over 80 characters
torvalds#91: FILE: mm/nommu.c:181:
+			              struct page **pages, unsigned int gup_flags)

ERROR: code indent should use tabs where possible
torvalds#91: FILE: mm/nommu.c:181:
+^I^I^I              struct page **pages, unsigned int gup_flags)$

total: 2 errors, 3 warnings, 116 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

NOTE: Whitespace errors detected.
      You may wish to use scripts/cleanpatch or scripts/cleanfile

./patches/mm-unexport-__get_user_pages_unlocked.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Lorenzo Stoakes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
fengguang pushed a commit to 0day-ci/linux that referenced this pull request Nov 25, 2016
ERROR: Please use git commit description style 'commit <12+ chars of sha1> ("<title line>")' - ie: 'commit 0123456789ab ("commit description")'
torvalds#16: 
flag.  However, this flag was originally silently dropped by 1e98779

WARNING: line over 80 characters
torvalds#89: FILE: mm/nommu.c:179:
+static long __get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm,

WARNING: line over 80 characters
torvalds#90: FILE: mm/nommu.c:180:
+				      unsigned long start, unsigned long nr_pages,

WARNING: line over 80 characters
torvalds#91: FILE: mm/nommu.c:181:
+			              struct page **pages, unsigned int gup_flags)

ERROR: code indent should use tabs where possible
torvalds#91: FILE: mm/nommu.c:181:
+^I^I^I              struct page **pages, unsigned int gup_flags)$

total: 2 errors, 3 warnings, 116 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

NOTE: Whitespace errors detected.
      You may wish to use scripts/cleanpatch or scripts/cleanfile

./patches/mm-unexport-__get_user_pages_unlocked.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Lorenzo Stoakes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
fengguang pushed a commit to 0day-ci/linux that referenced this pull request Nov 30, 2016
ERROR: Please use git commit description style 'commit <12+ chars of sha1> ("<title line>")' - ie: 'commit 0123456789ab ("commit description")'
torvalds#16:
flag.  However, this flag was originally silently dropped by 1e98779

WARNING: line over 80 characters
torvalds#89: FILE: mm/nommu.c:179:
+static long __get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm,

WARNING: line over 80 characters
torvalds#90: FILE: mm/nommu.c:180:
+				      unsigned long start, unsigned long nr_pages,

WARNING: line over 80 characters
torvalds#91: FILE: mm/nommu.c:181:
+			              struct page **pages, unsigned int gup_flags)

ERROR: code indent should use tabs where possible
torvalds#91: FILE: mm/nommu.c:181:
+^I^I^I              struct page **pages, unsigned int gup_flags)$

total: 2 errors, 3 warnings, 116 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

NOTE: Whitespace errors detected.
      You may wish to use scripts/cleanpatch or scripts/cleanfile

./patches/mm-unexport-__get_user_pages_unlocked.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Lorenzo Stoakes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
fengguang pushed a commit to 0day-ci/linux that referenced this pull request Dec 2, 2016
ERROR: Please use git commit description style 'commit <12+ chars of sha1> ("<title line>")' - ie: 'commit 0123456789ab ("commit description")'
torvalds#16: 
flag.  However, this flag was originally silently dropped by 1e98779

WARNING: line over 80 characters
torvalds#89: FILE: mm/nommu.c:179:
+static long __get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm,

WARNING: line over 80 characters
torvalds#90: FILE: mm/nommu.c:180:
+				      unsigned long start, unsigned long nr_pages,

WARNING: line over 80 characters
torvalds#91: FILE: mm/nommu.c:181:
+			              struct page **pages, unsigned int gup_flags)

ERROR: code indent should use tabs where possible
torvalds#91: FILE: mm/nommu.c:181:
+^I^I^I              struct page **pages, unsigned int gup_flags)$

total: 2 errors, 3 warnings, 116 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

NOTE: Whitespace errors detected.
      You may wish to use scripts/cleanpatch or scripts/cleanfile

./patches/mm-unexport-__get_user_pages_unlocked.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Lorenzo Stoakes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
fengguang pushed a commit to 0day-ci/linux that referenced this pull request Dec 8, 2016
ERROR: Please use git commit description style 'commit <12+ chars of sha1> ("<title line>")' - ie: 'commit 0123456789ab ("commit description")'
torvalds#16: 
flag.  However, this flag was originally silently dropped by 1e98779

WARNING: line over 80 characters
torvalds#89: FILE: mm/nommu.c:179:
+static long __get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm,

WARNING: line over 80 characters
torvalds#90: FILE: mm/nommu.c:180:
+				      unsigned long start, unsigned long nr_pages,

WARNING: line over 80 characters
torvalds#91: FILE: mm/nommu.c:181:
+			              struct page **pages, unsigned int gup_flags)

ERROR: code indent should use tabs where possible
torvalds#91: FILE: mm/nommu.c:181:
+^I^I^I              struct page **pages, unsigned int gup_flags)$

total: 2 errors, 3 warnings, 116 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

NOTE: Whitespace errors detected.
      You may wish to use scripts/cleanpatch or scripts/cleanfile

./patches/mm-unexport-__get_user_pages_unlocked.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Lorenzo Stoakes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 2, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 2, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 2, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 2, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 2, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 2, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 2, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 2, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 2, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 2, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 2, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 2, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 2, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 2, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 2, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 5, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 5, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 5, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Sep 5, 2022
commit d957e7f upstream.

storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
zhijianli88 pushed a commit to zhijianli88/linux that referenced this pull request Sep 26, 2022
storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
zhijianli88 pushed a commit to zhijianli88/linux that referenced this pull request Sep 27, 2022
storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it
doesn't need to make forward progress under memory pressure.  Marking this
workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a
non-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following
warning:

[   14.506347] ------------[ cut here ]------------
[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn
[   14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130
[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure torvalds#91~18.04.1-Ubuntu
[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022
[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun
[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130
		<-snip->
[   14.506408] Call Trace:
[   14.506412]  __flush_work+0xf1/0x1c0
[   14.506414]  __cancel_work_timer+0x12f/0x1b0
[   14.506417]  ? kernfs_put+0xf0/0x190
[   14.506418]  cancel_delayed_work_sync+0x13/0x20
[   14.506420]  disk_block_events+0x78/0x80
[   14.506421]  del_gendisk+0x3d/0x2f0
[   14.506423]  sr_remove+0x28/0x70
[   14.506427]  device_release_driver_internal+0xef/0x1c0
[   14.506428]  device_release_driver+0x12/0x20
[   14.506429]  bus_remove_device+0xe1/0x150
[   14.506431]  device_del+0x167/0x380
[   14.506432]  __scsi_remove_device+0x11d/0x150
[   14.506433]  scsi_remove_device+0x26/0x40
[   14.506434]  storvsc_remove_lun+0x40/0x60
[   14.506436]  process_one_work+0x209/0x400
[   14.506437]  worker_thread+0x34/0x400
[   14.506439]  kthread+0x121/0x140
[   14.506440]  ? process_one_work+0x400/0x400
[   14.506441]  ? kthread_park+0x90/0x90
[   14.506443]  ret_from_fork+0x35/0x40
[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---

Link: https://lore.kernel.org/r/[email protected]
Fixes: 436ad94 ("scsi: storvsc: Allow only one remove lun work item to be issued per lun")
Reviewed-by: Michael Kelley <[email protected]>
Signed-off-by: Saurabh Sengar <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Feb 1, 2023
If we bring up secondaries in parallel they might get confused unless we
impose some ordering here:

[    1.360149] x86: Booting SMP configuration:
[    1.360221] .... node  #0, CPUs:        #1  #2  #3  #4  #5  torvalds#6  torvalds#7  torvalds#8  torvalds#9 torvalds#10 torvalds#11 torvalds#12 torvalds#13 torvalds#14 torvalds#15 torvalds#16 torvalds#17 torvalds#18 torvalds#19 torvalds#20 torvalds#21 torvalds#22 torvalds#23
[    1.366225] .... node  #1, CPUs:   torvalds#24 torvalds#25 torvalds#26 torvalds#27 torvalds#28 torvalds#29 torvalds#30 torvalds#31 torvalds#32 torvalds#33 torvalds#34 torvalds#35 torvalds#36 torvalds#37 torvalds#38 torvalds#39 torvalds#40 torvalds#41 torvalds#42 torvalds#43 torvalds#44 torvalds#45 torvalds#46 torvalds#47
[    1.370219] .... node  #0, CPUs:   torvalds#48 torvalds#49 torvalds#50 torvalds#51 #52 #53 torvalds#54 torvalds#55 torvalds#56 torvalds#57 #58 torvalds#59 torvalds#60 torvalds#61 torvalds#62 torvalds#63 torvalds#64 torvalds#65 torvalds#66 torvalds#67 torvalds#68 torvalds#69 #70 torvalds#71
[    1.378226] .... node  #1, CPUs:   torvalds#72 torvalds#73 torvalds#74 torvalds#75 torvalds#76 torvalds#77 torvalds#78 torvalds#79 torvalds#80 torvalds#81 torvalds#82 torvalds#83 torvalds#84 torvalds#85 torvalds#86 torvalds#87 torvalds#88 torvalds#89 torvalds#90 torvalds#91 torvalds#92 torvalds#93 torvalds#94 torvalds#95
[    1.382037] Brought 96 CPUs to x86/cpu:kick in 72232606 cycles
[    0.104104] smpboot: CPU 26 Converting physical 0 to logical die 1
[    0.104104] smpboot: CPU 27 Converting physical 1 to logical package 2
[    0.104104] smpboot: CPU 24 Converting physical 1 to logical package 3
[    0.104104] smpboot: CPU 27 Converting physical 0 to logical die 2
[    0.104104] smpboot: CPU 25 Converting physical 1 to logical package 4
[    1.385609] Brought 96 CPUs to x86/cpu:wait-init in 9269218 cycles
[    1.395285] Brought CPUs online in 28930764 cycles
[    1.395469] smp: Brought up 2 nodes, 96 CPUs
[    1.395689] smpboot: Max logical packages: 2
[    1.396222] smpboot: Total of 96 processors activated (576000.00 BogoMIPS)

Do the full topology update in smp_store_cpu_info() under a spinlock
to ensure that things remain consistent.

[Usama Arif: fixed rebase conflict]
Signed-off-by: David Woodhouse <[email protected]>
Signed-off-by: Usama Arif <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Feb 8, 2023
The toplogy update is performed by the AP via smp_callin() after the BSP
has called do_wait_cpu_initialized(), setting the AP's bit in
cpu_callout_mask to allow it to proceed.

In preparation to enable further parallelism of AP bringup, add locking to
serialize the update even if multiple APs are (in future) permitted to
proceed through the next stages of bringup in parallel.

Without such ordering (and with that future extra parallelism), confusion
ensues:

[    1.360149] x86: Booting SMP configuration:
[    1.360221] .... node  #0, CPUs:        #1  #2  #3  #4  #5  torvalds#6  torvalds#7  torvalds#8  torvalds#9 torvalds#10 torvalds#11 torvalds#12 torvalds#13 torvalds#14 torvalds#15 torvalds#16 torvalds#17 torvalds#18 torvalds#19 torvalds#20 torvalds#21 torvalds#22 torvalds#23
[    1.366225] .... node  #1, CPUs:   torvalds#24 torvalds#25 torvalds#26 torvalds#27 torvalds#28 torvalds#29 torvalds#30 torvalds#31 torvalds#32 torvalds#33 torvalds#34 torvalds#35 torvalds#36 torvalds#37 torvalds#38 torvalds#39 torvalds#40 torvalds#41 torvalds#42 torvalds#43 torvalds#44 torvalds#45 torvalds#46 torvalds#47
[    1.370219] .... node  #0, CPUs:   torvalds#48 torvalds#49 torvalds#50 torvalds#51 #52 #53 torvalds#54 torvalds#55 torvalds#56 torvalds#57 #58 torvalds#59 torvalds#60 torvalds#61 torvalds#62 torvalds#63 torvalds#64 torvalds#65 torvalds#66 torvalds#67 torvalds#68 torvalds#69 #70 torvalds#71
[    1.378226] .... node  #1, CPUs:   torvalds#72 torvalds#73 torvalds#74 torvalds#75 torvalds#76 torvalds#77 torvalds#78 torvalds#79 torvalds#80 torvalds#81 torvalds#82 torvalds#83 torvalds#84 torvalds#85 torvalds#86 torvalds#87 torvalds#88 torvalds#89 torvalds#90 torvalds#91 torvalds#92 torvalds#93 torvalds#94 torvalds#95
[    1.382037] Brought 96 CPUs to x86/cpu:kick in 72232606 cycles
[    0.104104] smpboot: CPU 26 Converting physical 0 to logical die 1
[    0.104104] smpboot: CPU 27 Converting physical 1 to logical package 2
[    0.104104] smpboot: CPU 24 Converting physical 1 to logical package 3
[    0.104104] smpboot: CPU 27 Converting physical 0 to logical die 2
[    0.104104] smpboot: CPU 25 Converting physical 1 to logical package 4
[    1.385609] Brought 96 CPUs to x86/cpu:wait-init in 9269218 cycles
[    1.395285] Brought CPUs online in 28930764 cycles
[    1.395469] smp: Brought up 2 nodes, 96 CPUs
[    1.395689] smpboot: Max logical packages: 2
[    1.396222] smpboot: Total of 96 processors activated (576000.00 BogoMIPS)

[Usama Arif: fixed rebase conflict]
Signed-off-by: David Woodhouse <[email protected]>
Signed-off-by: Usama Arif <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Feb 9, 2023
The toplogy update is performed by the AP via smp_callin() after the BSP
has called do_wait_cpu_initialized(), setting the AP's bit in
cpu_callout_mask to allow it to proceed.

In preparation to enable further parallelism of AP bringup, add locking to
serialize the update even if multiple APs are (in future) permitted to
proceed through the next stages of bringup in parallel.

Without such ordering (and with that future extra parallelism), confusion
ensues:

[    1.360149] x86: Booting SMP configuration:
[    1.360221] .... node  #0, CPUs:        #1  #2  #3  #4  #5  torvalds#6  torvalds#7  torvalds#8  torvalds#9 torvalds#10 torvalds#11 torvalds#12 torvalds#13 torvalds#14 torvalds#15 torvalds#16 torvalds#17 torvalds#18 torvalds#19 torvalds#20 torvalds#21 torvalds#22 torvalds#23
[    1.366225] .... node  #1, CPUs:   torvalds#24 torvalds#25 torvalds#26 torvalds#27 torvalds#28 torvalds#29 torvalds#30 torvalds#31 torvalds#32 torvalds#33 torvalds#34 torvalds#35 torvalds#36 torvalds#37 torvalds#38 torvalds#39 torvalds#40 torvalds#41 torvalds#42 torvalds#43 torvalds#44 torvalds#45 torvalds#46 torvalds#47
[    1.370219] .... node  #0, CPUs:   torvalds#48 torvalds#49 torvalds#50 torvalds#51 #52 #53 torvalds#54 torvalds#55 torvalds#56 torvalds#57 #58 torvalds#59 torvalds#60 torvalds#61 torvalds#62 torvalds#63 torvalds#64 torvalds#65 torvalds#66 torvalds#67 torvalds#68 torvalds#69 #70 torvalds#71
[    1.378226] .... node  #1, CPUs:   torvalds#72 torvalds#73 torvalds#74 torvalds#75 torvalds#76 torvalds#77 torvalds#78 torvalds#79 torvalds#80 torvalds#81 torvalds#82 torvalds#83 torvalds#84 torvalds#85 torvalds#86 torvalds#87 torvalds#88 torvalds#89 torvalds#90 torvalds#91 torvalds#92 torvalds#93 torvalds#94 torvalds#95
[    1.382037] Brought 96 CPUs to x86/cpu:kick in 72232606 cycles
[    0.104104] smpboot: CPU 26 Converting physical 0 to logical die 1
[    0.104104] smpboot: CPU 27 Converting physical 1 to logical package 2
[    0.104104] smpboot: CPU 24 Converting physical 1 to logical package 3
[    0.104104] smpboot: CPU 27 Converting physical 0 to logical die 2
[    0.104104] smpboot: CPU 25 Converting physical 1 to logical package 4
[    1.385609] Brought 96 CPUs to x86/cpu:wait-init in 9269218 cycles
[    1.395285] Brought CPUs online in 28930764 cycles
[    1.395469] smp: Brought up 2 nodes, 96 CPUs
[    1.395689] smpboot: Max logical packages: 2
[    1.396222] smpboot: Total of 96 processors activated (576000.00 BogoMIPS)

[Usama Arif: fixed rebase conflict]
Signed-off-by: David Woodhouse <[email protected]>
Signed-off-by: Usama Arif <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-fork that referenced this pull request Feb 15, 2023
The toplogy update is performed by the AP via smp_callin() after the BSP
has called do_wait_cpu_initialized(), setting the AP's bit in
cpu_callout_mask to allow it to proceed.

In preparation to enable further parallelism of AP bringup, add locking to
serialize the update even if multiple APs are (in future) permitted to
proceed through the next stages of bringup in parallel.

Without such ordering (and with that future extra parallelism), confusion
ensues:

[    1.360149] x86: Booting SMP configuration:
[    1.360221] .... node  #0, CPUs:        #1  #2  #3  #4  #5  torvalds#6  torvalds#7  torvalds#8  torvalds#9 torvalds#10 torvalds#11 torvalds#12 torvalds#13 torvalds#14 torvalds#15 torvalds#16 torvalds#17 torvalds#18 torvalds#19 torvalds#20 torvalds#21 torvalds#22 torvalds#23
[    1.366225] .... node  #1, CPUs:   torvalds#24 torvalds#25 torvalds#26 torvalds#27 torvalds#28 torvalds#29 torvalds#30 torvalds#31 torvalds#32 torvalds#33 torvalds#34 torvalds#35 torvalds#36 torvalds#37 torvalds#38 torvalds#39 torvalds#40 torvalds#41 torvalds#42 torvalds#43 torvalds#44 torvalds#45 torvalds#46 torvalds#47
[    1.370219] .... node  #0, CPUs:   torvalds#48 torvalds#49 torvalds#50 torvalds#51 #52 #53 torvalds#54 torvalds#55 torvalds#56 torvalds#57 #58 torvalds#59 torvalds#60 torvalds#61 torvalds#62 torvalds#63 torvalds#64 torvalds#65 torvalds#66 torvalds#67 torvalds#68 torvalds#69 #70 torvalds#71
[    1.378226] .... node  #1, CPUs:   torvalds#72 torvalds#73 torvalds#74 torvalds#75 torvalds#76 torvalds#77 torvalds#78 torvalds#79 torvalds#80 torvalds#81 torvalds#82 torvalds#83 torvalds#84 torvalds#85 torvalds#86 torvalds#87 torvalds#88 torvalds#89 torvalds#90 torvalds#91 torvalds#92 torvalds#93 torvalds#94 torvalds#95
[    1.382037] Brought 96 CPUs to x86/cpu:kick in 72232606 cycles
[    0.104104] smpboot: CPU 26 Converting physical 0 to logical die 1
[    0.104104] smpboot: CPU 27 Converting physical 1 to logical package 2
[    0.104104] smpboot: CPU 24 Converting physical 1 to logical package 3
[    0.104104] smpboot: CPU 27 Converting physical 0 to logical die 2
[    0.104104] smpboot: CPU 25 Converting physical 1 to logical package 4
[    1.385609] Brought 96 CPUs to x86/cpu:wait-init in 9269218 cycles
[    1.395285] Brought CPUs online in 28930764 cycles
[    1.395469] smp: Brought up 2 nodes, 96 CPUs
[    1.395689] smpboot: Max logical packages: 2
[    1.396222] smpboot: Total of 96 processors activated (576000.00 BogoMIPS)

[Usama Arif: fixed rebase conflict]
Signed-off-by: David Woodhouse <[email protected]>
Signed-off-by: Usama Arif <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
sirlucjan pushed a commit to CachyOS/linux that referenced this pull request Feb 16, 2023
The toplogy update is performed by the AP via smp_callin() after the BSP
has called do_wait_cpu_initialized(), setting the AP's bit in
cpu_callout_mask to allow it to proceed.

In preparation to enable further parallelism of AP bringup, add locking to
serialize the update even if multiple APs are (in future) permitted to
proceed through the next stages of bringup in parallel.

Without such ordering (and with that future extra parallelism), confusion
ensues:

[    1.360149] x86: Booting SMP configuration:
[    1.360221] .... node  #0, CPUs:        #1  #2  #3  #4  #5  torvalds#6  torvalds#7  torvalds#8  torvalds#9 torvalds#10 torvalds#11 torvalds#12 torvalds#13 torvalds#14 torvalds#15 torvalds#16 torvalds#17 torvalds#18 torvalds#19 torvalds#20 torvalds#21 torvalds#22 torvalds#23
[    1.366225] .... node  #1, CPUs:   torvalds#24 torvalds#25 torvalds#26 torvalds#27 torvalds#28 torvalds#29 torvalds#30 torvalds#31 torvalds#32 torvalds#33 torvalds#34 torvalds#35 torvalds#36 torvalds#37 torvalds#38 torvalds#39 torvalds#40 torvalds#41 torvalds#42 torvalds#43 torvalds#44 torvalds#45 torvalds#46 torvalds#47
[    1.370219] .... node  #0, CPUs:   torvalds#48 torvalds#49 torvalds#50 torvalds#51 #52 #53 torvalds#54 torvalds#55 torvalds#56 torvalds#57 #58 torvalds#59 torvalds#60 torvalds#61 torvalds#62 torvalds#63 torvalds#64 torvalds#65 torvalds#66 torvalds#67 torvalds#68 torvalds#69 #70 torvalds#71
[    1.378226] .... node  #1, CPUs:   torvalds#72 torvalds#73 torvalds#74 torvalds#75 torvalds#76 torvalds#77 torvalds#78 torvalds#79 torvalds#80 torvalds#81 torvalds#82 torvalds#83 torvalds#84 torvalds#85 torvalds#86 torvalds#87 torvalds#88 torvalds#89 torvalds#90 torvalds#91 torvalds#92 torvalds#93 torvalds#94 torvalds#95
[    1.382037] Brought 96 CPUs to x86/cpu:kick in 72232606 cycles
[    0.104104] smpboot: CPU 26 Converting physical 0 to logical die 1
[    0.104104] smpboot: CPU 27 Converting physical 1 to logical package 2
[    0.104104] smpboot: CPU 24 Converting physical 1 to logical package 3
[    0.104104] smpboot: CPU 27 Converting physical 0 to logical die 2
[    0.104104] smpboot: CPU 25 Converting physical 1 to logical package 4
[    1.385609] Brought 96 CPUs to x86/cpu:wait-init in 9269218 cycles
[    1.395285] Brought CPUs online in 28930764 cycles
[    1.395469] smp: Brought up 2 nodes, 96 CPUs
[    1.395689] smpboot: Max logical packages: 2
[    1.396222] smpboot: Total of 96 processors activated (576000.00 BogoMIPS)

[Usama Arif: fixed rebase conflict]

Signed-off-by: David Woodhouse <[email protected]>
Signed-off-by: Usama Arif <[email protected]>
mj22226 pushed a commit to mj22226/linux that referenced this pull request Jul 30, 2023
logic10492 pushed a commit to logic10492/linux-amd-zen2 that referenced this pull request Jan 18, 2024
gyroninja added a commit to gyroninja/linux that referenced this pull request Jan 28, 2024
KSAN calls into rcu code which then triggers a write that reenters into KSAN
getting the system stuck doing infinite recursion.

#0  kmsan_get_context () at mm/kmsan/kmsan.h:106
#1  __msan_get_context_state () at mm/kmsan/instrumentation.c:331
#2  0xffffffff81495671 in get_current () at ./arch/x86/include/asm/current.h:42
#3  rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
#4  __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
#5  0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#6  pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#7  kmsan_virt_addr_valid (addr=addr@entry=0xffffffff8620d974 <init_task+1012>) at ./arch/x86/include/asm/kmsan.h:82
torvalds#8  virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/shadow.c:75
torvalds#9  0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff8620d974 <init_task+1012>, is_origin=false) at mm/kmsan/shadow.c:143
torvalds#10 kmsan_get_shadow_origin_ptr (address=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/shadow.c:97
torvalds#11 0xffffffff81b1dbd2 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/instrumentation.c:36
torvalds#12 __msan_metadata_ptr_for_load_4 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:91
torvalds#13 0xffffffff8149568f in rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
torvalds#14 __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
torvalds#15 0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#16 pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#17 kmsan_virt_addr_valid (addr=addr@entry=0xffffffff8620d974 <init_task+1012>) at ./arch/x86/include/asm/kmsan.h:82
torvalds#18 virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/shadow.c:75
torvalds#19 0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff8620d974 <init_task+1012>, is_origin=false) at mm/kmsan/shadow.c:143
torvalds#20 kmsan_get_shadow_origin_ptr (address=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/shadow.c:97
torvalds#21 0xffffffff81b1dbd2 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/instrumentation.c:36
torvalds#22 __msan_metadata_ptr_for_load_4 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:91
torvalds#23 0xffffffff8149568f in rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
torvalds#24 __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
torvalds#25 0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#26 pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#27 kmsan_virt_addr_valid (addr=addr@entry=0xffffffff8620d974 <init_task+1012>) at ./arch/x86/include/asm/kmsan.h:82
torvalds#28 virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/shadow.c:75
torvalds#29 0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff8620d974 <init_task+1012>, is_origin=false) at mm/kmsan/shadow.c:143
torvalds#30 kmsan_get_shadow_origin_ptr (address=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/shadow.c:97
torvalds#31 0xffffffff81b1dbd2 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/instrumentation.c:36
torvalds#32 __msan_metadata_ptr_for_load_4 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:91
torvalds#33 0xffffffff8149568f in rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
torvalds#34 __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
torvalds#35 0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#36 pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#37 kmsan_virt_addr_valid (addr=addr@entry=0xffffffff8620d974 <init_task+1012>) at ./arch/x86/include/asm/kmsan.h:82
torvalds#38 virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/shadow.c:75
torvalds#39 0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff8620d974 <init_task+1012>, is_origin=false) at mm/kmsan/shadow.c:143
torvalds#40 kmsan_get_shadow_origin_ptr (address=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/shadow.c:97
torvalds#41 0xffffffff81b1dbd2 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/instrumentation.c:36
torvalds#42 __msan_metadata_ptr_for_load_4 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:91
torvalds#43 0xffffffff8149568f in rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
torvalds#44 __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
torvalds#45 0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#46 pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#47 kmsan_virt_addr_valid (addr=addr@entry=0xffffffff8620d974 <init_task+1012>) at ./arch/x86/include/asm/kmsan.h:82
torvalds#48 virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/shadow.c:75
torvalds#49 0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff8620d974 <init_task+1012>, is_origin=false) at mm/kmsan/shadow.c:143
torvalds#50 kmsan_get_shadow_origin_ptr (address=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/shadow.c:97
torvalds#51 0xffffffff81b1dbd2 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/instrumentation.c:36
#52 __msan_metadata_ptr_for_load_4 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:91
#53 0xffffffff8149568f in rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
torvalds#54 __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
torvalds#55 0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#56 pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#57 kmsan_virt_addr_valid (addr=addr@entry=0xffffffff8620d974 <init_task+1012>) at ./arch/x86/include/asm/kmsan.h:82
#58 virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/shadow.c:75
torvalds#59 0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff8620d974 <init_task+1012>, is_origin=false) at mm/kmsan/shadow.c:143
torvalds#60 kmsan_get_shadow_origin_ptr (address=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/shadow.c:97
torvalds#61 0xffffffff81b1dbd2 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/instrumentation.c:36
torvalds#62 __msan_metadata_ptr_for_load_4 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:91
torvalds#63 0xffffffff8149568f in rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
torvalds#64 __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
torvalds#65 0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#66 pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#67 kmsan_virt_addr_valid (addr=addr@entry=0xffffffff8620d974 <init_task+1012>) at ./arch/x86/include/asm/kmsan.h:82
torvalds#68 virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/shadow.c:75
torvalds#69 0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff8620d974 <init_task+1012>, is_origin=false) at mm/kmsan/shadow.c:143
#70 kmsan_get_shadow_origin_ptr (address=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/shadow.c:97
torvalds#71 0xffffffff81b1dbd2 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/instrumentation.c:36
torvalds#72 __msan_metadata_ptr_for_load_4 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:91
torvalds#73 0xffffffff8149568f in rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
torvalds#74 __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
torvalds#75 0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#76 pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#77 kmsan_virt_addr_valid (addr=addr@entry=0xffffffff86203c90) at ./arch/x86/include/asm/kmsan.h:82
torvalds#78 virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff86203c90) at mm/kmsan/shadow.c:75
torvalds#79 0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff86203c90, is_origin=false) at mm/kmsan/shadow.c:143
torvalds#80 kmsan_get_shadow_origin_ptr (address=0xffffffff86203c90, size=8, store=false) at mm/kmsan/shadow.c:97
torvalds#81 0xffffffff81b1dc72 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=8, store=false) at mm/kmsan/instrumentation.c:36
torvalds#82 __msan_metadata_ptr_for_load_8 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:92
torvalds#83 0xffffffff814fdb9e in filter_irq_stacks (entries=<optimized out>, nr_entries=4) at kernel/stacktrace.c:397
torvalds#84 0xffffffff829520e8 in stack_depot_save_flags (entries=0xffffffff8620d974 <init_task+1012>, nr_entries=4, alloc_flags=0, depot_flags=0) at lib/stackdepot.c:500
torvalds#85 0xffffffff81b1e560 in __msan_poison_alloca (address=0xffffffff86203da0, size=24, descr=<optimized out>) at mm/kmsan/instrumentation.c:285
torvalds#86 0xffffffff8562821c in _printk (fmt=0xffffffff85f191a5 "\0016Attempting lock1") at kernel/printk/printk.c:2324
torvalds#87 0xffffffff81942aa2 in kmem_cache_create_usercopy (name=0xffffffff85f18903 "mm_struct", size=1296, align=0, flags=270336, useroffset=<optimized out>, usersize=<optimized out>, ctor=0x0 <fixed_percpu_data>) at mm/slab_common.c:296
torvalds#88 0xffffffff86f337a0 in mm_cache_init () at kernel/fork.c:3262
torvalds#89 0xffffffff86eacb8e in start_kernel () at init/main.c:932
torvalds#90 0xffffffff86ecdf94 in x86_64_start_reservations (real_mode_data=0x140e0 <exception_stacks+28896> <error: Cannot access memory at address 0x140e0>) at arch/x86/kernel/head64.c:555
torvalds#91 0xffffffff86ecde9b in x86_64_start_kernel (real_mode_data=0x140e0 <exception_stacks+28896> <error: Cannot access memory at address 0x140e0>) at arch/x86/kernel/head64.c:536
torvalds#92 0xffffffff810001d3 in secondary_startup_64 () at /pool/workspace/linux/arch/x86/kernel/head_64.S:461
torvalds#93 0x0000000000000000 in ??
gyroninja added a commit to gyroninja/linux that referenced this pull request Jan 28, 2024
As of 5ec8e8e(mm/sparsemem: fix race in accessing memory_section->usage) KMSAN
now calls into RCU tree code during kmsan_get_metadata. This will trigger a
write that will reenter into KMSAN getting the system stuck doing infinite
recursion.

#0  kmsan_get_context () at mm/kmsan/kmsan.h:106
#1  __msan_get_context_state () at mm/kmsan/instrumentation.c:331
#2  0xffffffff81495671 in get_current () at ./arch/x86/include/asm/current.h:42
#3  rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
#4  __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
#5  0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#6  pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#7  kmsan_virt_addr_valid (addr=addr@entry=0xffffffff8620d974 <init_task+1012>) at ./arch/x86/include/asm/kmsan.h:82
torvalds#8  virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/shadow.c:75
torvalds#9  0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff8620d974 <init_task+1012>, is_origin=false) at mm/kmsan/shadow.c:143
torvalds#10 kmsan_get_shadow_origin_ptr (address=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/shadow.c:97
torvalds#11 0xffffffff81b1dbd2 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/instrumentation.c:36
torvalds#12 __msan_metadata_ptr_for_load_4 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:91
torvalds#13 0xffffffff8149568f in rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
torvalds#14 __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
torvalds#15 0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#16 pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#17 kmsan_virt_addr_valid (addr=addr@entry=0xffffffff8620d974 <init_task+1012>) at ./arch/x86/include/asm/kmsan.h:82
torvalds#18 virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/shadow.c:75
torvalds#19 0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff8620d974 <init_task+1012>, is_origin=false) at mm/kmsan/shadow.c:143
torvalds#20 kmsan_get_shadow_origin_ptr (address=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/shadow.c:97
torvalds#21 0xffffffff81b1dbd2 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/instrumentation.c:36
torvalds#22 __msan_metadata_ptr_for_load_4 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:91
torvalds#23 0xffffffff8149568f in rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
torvalds#24 __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
torvalds#25 0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#26 pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#27 kmsan_virt_addr_valid (addr=addr@entry=0xffffffff8620d974 <init_task+1012>) at ./arch/x86/include/asm/kmsan.h:82
torvalds#28 virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/shadow.c:75
torvalds#29 0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff8620d974 <init_task+1012>, is_origin=false) at mm/kmsan/shadow.c:143
torvalds#30 kmsan_get_shadow_origin_ptr (address=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/shadow.c:97
torvalds#31 0xffffffff81b1dbd2 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/instrumentation.c:36
torvalds#32 __msan_metadata_ptr_for_load_4 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:91
torvalds#33 0xffffffff8149568f in rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
torvalds#34 __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
torvalds#35 0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#36 pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#37 kmsan_virt_addr_valid (addr=addr@entry=0xffffffff8620d974 <init_task+1012>) at ./arch/x86/include/asm/kmsan.h:82
torvalds#38 virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/shadow.c:75
torvalds#39 0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff8620d974 <init_task+1012>, is_origin=false) at mm/kmsan/shadow.c:143
torvalds#40 kmsan_get_shadow_origin_ptr (address=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/shadow.c:97
torvalds#41 0xffffffff81b1dbd2 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/instrumentation.c:36
torvalds#42 __msan_metadata_ptr_for_load_4 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:91
torvalds#43 0xffffffff8149568f in rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
torvalds#44 __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
torvalds#45 0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#46 pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#47 kmsan_virt_addr_valid (addr=addr@entry=0xffffffff8620d974 <init_task+1012>) at ./arch/x86/include/asm/kmsan.h:82
torvalds#48 virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/shadow.c:75
torvalds#49 0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff8620d974 <init_task+1012>, is_origin=false) at mm/kmsan/shadow.c:143
torvalds#50 kmsan_get_shadow_origin_ptr (address=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/shadow.c:97
torvalds#51 0xffffffff81b1dbd2 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/instrumentation.c:36
#52 __msan_metadata_ptr_for_load_4 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:91
#53 0xffffffff8149568f in rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
torvalds#54 __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
torvalds#55 0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#56 pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#57 kmsan_virt_addr_valid (addr=addr@entry=0xffffffff8620d974 <init_task+1012>) at ./arch/x86/include/asm/kmsan.h:82
#58 virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/shadow.c:75
torvalds#59 0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff8620d974 <init_task+1012>, is_origin=false) at mm/kmsan/shadow.c:143
torvalds#60 kmsan_get_shadow_origin_ptr (address=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/shadow.c:97
torvalds#61 0xffffffff81b1dbd2 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/instrumentation.c:36
torvalds#62 __msan_metadata_ptr_for_load_4 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:91
torvalds#63 0xffffffff8149568f in rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
torvalds#64 __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
torvalds#65 0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#66 pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#67 kmsan_virt_addr_valid (addr=addr@entry=0xffffffff8620d974 <init_task+1012>) at ./arch/x86/include/asm/kmsan.h:82
torvalds#68 virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/shadow.c:75
torvalds#69 0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff8620d974 <init_task+1012>, is_origin=false) at mm/kmsan/shadow.c:143
#70 kmsan_get_shadow_origin_ptr (address=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/shadow.c:97
torvalds#71 0xffffffff81b1dbd2 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=4, store=false) at mm/kmsan/instrumentation.c:36
torvalds#72 __msan_metadata_ptr_for_load_4 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:91
torvalds#73 0xffffffff8149568f in rcu_preempt_read_enter () at kernel/rcu/tree_plugin.h:379
torvalds#74 __rcu_read_lock () at kernel/rcu/tree_plugin.h:402
torvalds#75 0xffffffff81b2054b in rcu_read_lock () at ./include/linux/rcupdate.h:748
torvalds#76 pfn_valid (pfn=<optimized out>) at ./include/linux/mmzone.h:2016
torvalds#77 kmsan_virt_addr_valid (addr=addr@entry=0xffffffff86203c90) at ./arch/x86/include/asm/kmsan.h:82
torvalds#78 virt_to_page_or_null (vaddr=vaddr@entry=0xffffffff86203c90) at mm/kmsan/shadow.c:75
torvalds#79 0xffffffff81b2023c in kmsan_get_metadata (address=0xffffffff86203c90, is_origin=false) at mm/kmsan/shadow.c:143
torvalds#80 kmsan_get_shadow_origin_ptr (address=0xffffffff86203c90, size=8, store=false) at mm/kmsan/shadow.c:97
torvalds#81 0xffffffff81b1dc72 in get_shadow_origin_ptr (addr=0xffffffff8620d974 <init_task+1012>, size=8, store=false) at mm/kmsan/instrumentation.c:36
torvalds#82 __msan_metadata_ptr_for_load_8 (addr=0xffffffff8620d974 <init_task+1012>) at mm/kmsan/instrumentation.c:92
torvalds#83 0xffffffff814fdb9e in filter_irq_stacks (entries=<optimized out>, nr_entries=4) at kernel/stacktrace.c:397
torvalds#84 0xffffffff829520e8 in stack_depot_save_flags (entries=0xffffffff8620d974 <init_task+1012>, nr_entries=4, alloc_flags=0, depot_flags=0) at lib/stackdepot.c:500
torvalds#85 0xffffffff81b1e560 in __msan_poison_alloca (address=0xffffffff86203da0, size=24, descr=<optimized out>) at mm/kmsan/instrumentation.c:285
torvalds#86 0xffffffff8562821c in _printk (fmt=0xffffffff85f191a5 "\0016Attempting lock1") at kernel/printk/printk.c:2324
torvalds#87 0xffffffff81942aa2 in kmem_cache_create_usercopy (name=0xffffffff85f18903 "mm_struct", size=1296, align=0, flags=270336, useroffset=<optimized out>, usersize=<optimized out>, ctor=0x0 <fixed_percpu_data>) at mm/slab_common.c:296
torvalds#88 0xffffffff86f337a0 in mm_cache_init () at kernel/fork.c:3262
torvalds#89 0xffffffff86eacb8e in start_kernel () at init/main.c:932
torvalds#90 0xffffffff86ecdf94 in x86_64_start_reservations (real_mode_data=0x140e0 <exception_stacks+28896> <error: Cannot access memory at address 0x140e0>) at arch/x86/kernel/head64.c:555
torvalds#91 0xffffffff86ecde9b in x86_64_start_kernel (real_mode_data=0x140e0 <exception_stacks+28896> <error: Cannot access memory at address 0x140e0>) at arch/x86/kernel/head64.c:536
torvalds#92 0xffffffff810001d3 in secondary_startup_64 () at /pool/workspace/linux/arch/x86/kernel/head_64.S:461
torvalds#93 0x0000000000000000 in ??
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