Memory leak?

[dentarg]

Apr 10:

14:15:01 -!- rufwebot [[email protected]] has quit [EOF from client]

Apr 10 12:15:01 localhost kernel: [7489067.825729] cron invoked oom-killer: gfp_mask=0x26000c0, order=2, oom_score_adj=0
...
Apr 10 12:15:01 localhost kernel: [7489067.826752] Out of memory: Kill process 806 (python) score 603 or sacrifice child
Apr 10 12:15:01 localhost kernel: [7489067.827342] Killed process 806 (python) total-vm:355936kB, anon-rss:297092kB, file-rss:4128kB

cat /var/log/kern.log.1

$ sudo cat /var/log/kern.log.1
Apr 10 12:15:01 localhost kernel: [7489067.825729] cron invoked oom-killer: gfp_mask=0x26000c0, order=2, oom_score_adj=0
Apr 10 12:15:01 localhost kernel: [7489067.825739] cron cpuset=/ mems_allowed=0
Apr 10 12:15:01 localhost kernel: [7489067.825766] CPU: 0 PID: 22671 Comm: cron Not tainted 4.4.0-59-generic #80-Ubuntu
Apr 10 12:15:01 localhost kernel: [7489067.825769] Hardware name: DigitalOcean Droplet, BIOS 20160425 04/25/2016
Apr 10 12:15:01 localhost kernel: [7489067.825772]  0000000000000286 00000000fb6727eb ffff88001edffaf0 ffffffff813f7583
Apr 10 12:15:01 localhost kernel: [7489067.825793]  ffff88001edffcc8 ffff88001f381c00 ffff88001edffb60 ffffffff8120ad5e
Apr 10 12:15:01 localhost kernel: [7489067.825797]  ffffffff81cd2dc7 0000000000000000 ffffffff81e67760 0000000000000206
Apr 10 12:15:01 localhost kernel: [7489067.825801] Call Trace:
Apr 10 12:15:01 localhost kernel: [7489067.826318]  [<ffffffff813f7583>] dump_stack+0x63/0x90
Apr 10 12:15:01 localhost kernel: [7489067.826349]  [<ffffffff8120ad5e>] dump_header+0x5a/0x1c5
Apr 10 12:15:01 localhost kernel: [7489067.826372]  [<ffffffff81192722>] oom_kill_process+0x202/0x3c0
Apr 10 12:15:01 localhost kernel: [7489067.826376]  [<ffffffff81192b49>] out_of_memory+0x219/0x460
Apr 10 12:15:01 localhost kernel: [7489067.826385]  [<ffffffff81198abd>] __alloc_pages_slowpath.constprop.88+0x8fd/0xa70
Apr 10 12:15:01 localhost kernel: [7489067.826390]  [<ffffffff81198eb6>] __alloc_pages_nodemask+0x286/0x2a0
Apr 10 12:15:01 localhost kernel: [7489067.826394]  [<ffffffff81198f6b>] alloc_kmem_pages_node+0x4b/0xc0
Apr 10 12:15:01 localhost kernel: [7489067.826420]  [<ffffffff8107ea5e>] copy_process+0x1be/0x1b70
Apr 10 12:15:01 localhost kernel: [7489067.826439]  [<ffffffff812259ee>] ? dentry_free+0x4e/0x90
Apr 10 12:15:01 localhost kernel: [7489067.826443]  [<ffffffff81225dc2>] ? __dentry_kill+0x162/0x1e0
Apr 10 12:15:01 localhost kernel: [7489067.826446]  [<ffffffff8122602e>] ? dput+0x1ee/0x220
Apr 10 12:15:01 localhost kernel: [7489067.826449]  [<ffffffff810805a0>] _do_fork+0x80/0x360
Apr 10 12:15:01 localhost kernel: [7489067.826471]  [<ffffffff81003226>] ? exit_to_usermode_loop+0xa6/0xd0
Apr 10 12:15:01 localhost kernel: [7489067.826475]  [<ffffffff81080929>] SyS_clone+0x19/0x20
Apr 10 12:15:01 localhost kernel: [7489067.826526]  [<ffffffff818384f2>] entry_SYSCALL_64_fastpath+0x16/0x71
Apr 10 12:15:01 localhost kernel: [7489067.826529] Mem-Info:
Apr 10 12:15:01 localhost kernel: [7489067.826541] active_anon:79282 inactive_anon:1279 isolated_anon:0
Apr 10 12:15:01 localhost kernel: [7489067.826541]  active_file:16061 inactive_file:10266 isolated_file:0
Apr 10 12:15:01 localhost kernel: [7489067.826541]  unevictable:0 dirty:0 writeback:0 unstable:0
Apr 10 12:15:01 localhost kernel: [7489067.826541]  slab_reclaimable:5164 slab_unreclaimable:6201
Apr 10 12:15:01 localhost kernel: [7489067.826541]  mapped:2768 shmem:1383 pagetables:678 bounce:0
Apr 10 12:15:01 localhost kernel: [7489067.826541]  free:3251 free_pcp:0 free_cma:0
Apr 10 12:15:01 localhost kernel: [7489067.826553] Node 0 DMA free:3880kB min:92kB low:112kB high:136kB active_anon:9052kB inactive_anon:180kB active_file:8kB inactive_file:8kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15992kB managed:15908kB mlocked:0kB dirty:0kB writeback:0kB mapped:4kB shmem:184kB slab_reclaimable:1236kB slab_unreclaimable:612kB kernel_stack:96kB pagetables:88kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Apr 10 12:15:01 localhost kernel: [7489067.826566] lowmem_reserve[]: 0 437 437 437 437
Apr 10 12:15:01 localhost kernel: [7489067.826571] Node 0 DMA32 free:9124kB min:2628kB low:3284kB high:3940kB active_anon:308076kB inactive_anon:4936kB active_file:64236kB inactive_file:41056kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:507896kB managed:484228kB mlocked:0kB dirty:0kB writeback:0kB mapped:11068kB shmem:5348kB slab_reclaimable:19420kB slab_unreclaimable:24192kB kernel_stack:1648kB pagetables:2624kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Apr 10 12:15:01 localhost kernel: [7489067.826578] lowmem_reserve[]: 0 0 0 0 0
Apr 10 12:15:01 localhost kernel: [7489067.826582] Node 0 DMA: 118*4kB (UMH) 118*8kB (UMEH) 64*16kB (MH) 21*32kB (UMEH) 8*64kB (UMH) 2*128kB (H) 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 3880kB
Apr 10 12:15:01 localhost kernel: [7489067.826602] Node 0 DMA32: 1603*4kB (UMEH) 341*8kB (UMEH) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 9140kB
Apr 10 12:15:01 localhost kernel: [7489067.826625] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Apr 10 12:15:01 localhost kernel: [7489067.826627] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
Apr 10 12:15:01 localhost kernel: [7489067.826629] 27713 total pagecache pages
Apr 10 12:15:01 localhost kernel: [7489067.826640] 0 pages in swap cache
Apr 10 12:15:01 localhost kernel: [7489067.826642] Swap cache stats: add 0, delete 0, find 0/0
Apr 10 12:15:01 localhost kernel: [7489067.826644] Free swap  = 0kB
Apr 10 12:15:01 localhost kernel: [7489067.826645] Total swap = 0kB
Apr 10 12:15:01 localhost kernel: [7489067.826647] 130972 pages RAM
Apr 10 12:15:01 localhost kernel: [7489067.826648] 0 pages HighMem/MovableOnly
Apr 10 12:15:01 localhost kernel: [7489067.826650] 5938 pages reserved
Apr 10 12:15:01 localhost kernel: [7489067.826651] 0 pages cma reserved
Apr 10 12:15:01 localhost kernel: [7489067.826652] 0 pages hwpoisoned
Apr 10 12:15:01 localhost kernel: [7489067.826654] [ pid ]   uid  tgid total_vm      rss nr_ptes nr_pmds swapents oom_score_adj name
Apr 10 12:15:01 localhost kernel: [7489067.826664] [  489]     0   489     6928      600      17       3        0             0 systemd-journal
Apr 10 12:15:01 localhost kernel: [7489067.826672] [  562]     0   562    11029      542      22       3        0         -1000 systemd-udevd
Apr 10 12:15:01 localhost kernel: [7489067.826676] [  607]   105   607    25081      407      19       4        0             0 systemd-timesyn
Apr 10 12:15:01 localhost kernel: [7489067.826679] [  639]   102   639    10726      403      25       3        0          -900 dbus-daemon
Apr 10 12:15:01 localhost kernel: [7489067.826693] [  644]     0   644     7470      146      19       3        0             0 cgmanager
Apr 10 12:15:01 localhost kernel: [7489067.826697] [  646]   101   646    64099      569      27       4        0             0 rsyslogd
Apr 10 12:15:01 localhost kernel: [7489067.826700] [  650]     0   650     1100      268       8       3        0             0 acpid
Apr 10 12:15:01 localhost kernel: [7489067.826704] [  665]     0   665     7156      496      19       3        0             0 systemd-logind
Apr 10 12:15:01 localhost kernel: [7489067.826707] [  668]     0   668     6511      360      18       3        0             0 atd
Apr 10 12:15:01 localhost kernel: [7489067.826710] [  670]     0   670     7252      505      20       3        0             0 cron
Apr 10 12:15:01 localhost kernel: [7489067.826713] [  691]  1001   691     6797      457      15       3        0             0 screen
Apr 10 12:15:01 localhost kernel: [7489067.826716] [  693]  1000   693     7355      503      19       3        0             0 tmux
Apr 10 12:15:01 localhost kernel: [7489067.826719] [  694]  1000   694     1127      183       8       3        0             0 sh
Apr 10 12:15:01 localhost kernel: [7489067.826722] [  696]  1001   696    10754     2619      25       3        0             0 honcho
Apr 10 12:15:01 localhost kernel: [7489067.826725] [  697]  1000   697    28939      929      26       3        0             0 irssi
Apr 10 12:15:01 localhost kernel: [7489067.826728] [  715]   104   715     3215      321      11       3        0             0 oidentd
Apr 10 12:15:01 localhost kernel: [7489067.826731] [  804]  1001   804     1127      143       8       3        0             0 sh
Apr 10 12:15:01 localhost kernel: [7489067.826734] [  806]  1001   806    88984    75305     186       3        0             0 python
Apr 10 12:15:01 localhost kernel: [7489067.826737] [  901]     0   901    16380      684      36       3        0         -1000 sshd
Apr 10 12:15:01 localhost kernel: [7489067.826740] [  918]     0   918     3985      288      13       3        0             0 agetty
Apr 10 12:15:01 localhost kernel: [7489067.826743] [22669]     0 22669    16716     1536      36       3        0             0 sshd
Apr 10 12:15:01 localhost kernel: [7489067.826746] [22670]   103 22670    16716      810      35       3        0             0 sshd
Apr 10 12:15:01 localhost kernel: [7489067.826749] [22671]     0 22671    18196      931      41       3        0             0 cron
Apr 10 12:15:01 localhost kernel: [7489067.826752] Out of memory: Kill process 806 (python) score 603 or sacrifice child
Apr 10 12:15:01 localhost kernel: [7489067.827342] Killed process 806 (python) total-vm:355936kB, anon-rss:297092kB, file-rss:4128kB