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BUG: problems using the Python bindings #3

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amitsaha opened this issue Mar 13, 2015 · 3 comments
Closed

BUG: problems using the Python bindings #3

amitsaha opened this issue Mar 13, 2015 · 3 comments
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@pcmoore
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@amitsaha
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This is what I have so far:

$ sudo make install
  PYTHON   build
make[1]: Entering directory '/home/gene/libseccomp/src/python'
VERSION_RELEASE="0.0.0" CPPFLAGS="-I\../../include -I../../include " CFLAGS="-Wall -g -O2" LDFLAGS="-Wl,-z -Wl,relro " /usr/bin/env python ./setup.py install --prefix=//usr/local
running install
running build
running build_ext
skipping 'seccomp.c' Cython extension (up-to-date)
running install_lib
running install_egg_info
Removing //usr/local/lib64/python2.7/site-packages/seccomp-0.0.0-py2.7.egg-info
Writing //usr/local/lib64/python2.7/site-packages/seccomp-0.0.0-py2.7.egg-info
make[1]: Nothing to be done for 'install-data-am'.
make[1]: Leaving directory '/home/gene/libseccomp/src/python'

I can't seem to import it though:

$ python
Python 2.7.9 (default, Feb  6 2015, 14:42:41) 
[GCC 5.0.0 20150205 (Red Hat 5.0.0-0.7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from seccomp import *
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named seccomp
>>>

Probably I am missing something.
@pcmoore
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pcmoore commented Mar 13, 2015

Is your python install setup to look for python modules under /usr/local?

@pcmoore pcmoore self-assigned this Mar 13, 2015
@pcmoore pcmoore changed the title How to use the Python bindings? Problems using the Python bindings Mar 13, 2015
@pcmoore pcmoore changed the title Problems using the Python bindings BUG: problems using the Python bindings Mar 13, 2015
@amitsaha
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Good point, i will check it and report back.

@amitsaha
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Yup, that was it. Sorry for the noise.

giuseppe added a commit to giuseppe/libseccomp that referenced this issue Mar 18, 2021
@giuseppe
bpf: fix uninitialized value usage
64ebe8e 
it was reported by clang with the option -fsanitize=memory:

  Uninitialized value was created by a heap allocation
    #0 0x4547ef in realloc (src/crun/tests/tests_libcrun_fuzzer+0x4547ef)
    seccomp#1 0x7f4900a3a903 in _bpf_append_blk src/libseccomp/src/gen_bpf.c:452:10
    seccomp#2 0x7f4900a3a903 in _gen_bpf_build_bpf src/libseccomp/src/gen_bpf.c:2276:8
    seccomp#3 0x7f4900a3a903 in gen_bpf_generate src/libseccomp/src/gen_bpf.c:2324:7

  Uninitialized value was created by a heap allocation
    #0 0x4547ef in realloc (src/crun/tests/tests_libcrun_fuzzer+0x4547ef)
    seccomp#1 0x7f8f755a81c0 in _blk_resize.constprop.0 src/libseccomp/src/gen_bpf.c:362:8

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/libseccomp that referenced this issue Mar 18, 2021
@giuseppe
bpf: fix uninitialized value usage
9777751 
it was reported by clang with the option -fsanitize=memory:

Uninitialized bytes in MemcmpInterceptorCommon at offset 0 inside [0x7070000002a0, 56)
==3791089==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x482a2c in memcmp (fuzzer+0x482a2c)
    seccomp#1 0x7fed2f120ebb in _hsh_add src/libseccomp/src/gen_bpf.c:598:9
    seccomp#2 0x7fed2f121715 in _gen_bpf_action_hsh src/libseccomp/src/gen_bpf.c:796:6
    seccomp#3 0x7fed2f121a53 in _gen_bpf_node src/libseccomp/src/gen_bpf.c:831:11
    seccomp#4 0x7fed2f121a53 in _gen_bpf_chain.isra.0 src/libseccomp/src/gen_bpf.c:1072:13
    seccomp#5 0x7fed2f121f16 in _gen_bpf_chain_lvl_res src/libseccomp/src/gen_bpf.c:977:12
    seccomp#6 0x7fed2f121c74 in _gen_bpf_chain.isra.0 src/libseccomp/src/gen_bpf.c:1124:12
    seccomp#7 0x7fed2f12253c in _gen_bpf_syscall src/libseccomp/src/gen_bpf.c:1520:10
    seccomp#8 0x7fed2f12253c in _gen_bpf_syscalls src/libseccomp/src/gen_bpf.c:1615:18
    seccomp#9 0x7fed2f12253c in _gen_bpf_arch src/libseccomp/src/gen_bpf.c:1683:7
    seccomp#10 0x7fed2f12253c in _gen_bpf_build_bpf src/libseccomp/src/gen_bpf.c:2056:11
    seccomp#11 0x7fed2f12253c in gen_bpf_generate src/libseccomp/src/gen_bpf.c:2321:7
    seccomp#12 0x7fed2f11f41c in seccomp_export_bpf src/libseccomp/src/api.c:724:7

  Uninitialized value was created by a heap allocation
    #0 0x4547ef in realloc (fuzzer+0x4547ef)
    seccomp#1 0x7fed2f121244 in _blk_resize src/libseccomp/src/gen_bpf.c:362:8
    seccomp#2 0x7fed2f121244 in _blk_append src/libseccomp/src/gen_bpf.c:394:6

Signed-off-by: Giuseppe Scrivano <[email protected]>
@giuseppe giuseppe mentioned this issue Mar 18, 2021
Merged
giuseppe added a commit to giuseppe/libseccomp that referenced this issue Mar 18, 2021
@giuseppe
bpf: fix uninitialized value usage
064e793 
it was reported by clang with the option -fsanitize=memory:

Uninitialized bytes in MemcmpInterceptorCommon at offset 0 inside [0x7070000002a0, 56)
==3791089==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x482a2c in memcmp (fuzzer+0x482a2c)
    seccomp#1 0x7fed2f120ebb in _hsh_add src/libseccomp/src/gen_bpf.c:598:9
    seccomp#2 0x7fed2f121715 in _gen_bpf_action_hsh src/libseccomp/src/gen_bpf.c:796:6
    seccomp#3 0x7fed2f121a53 in _gen_bpf_node src/libseccomp/src/gen_bpf.c:831:11
    seccomp#4 0x7fed2f121a53 in _gen_bpf_chain.isra.0 src/libseccomp/src/gen_bpf.c:1072:13
    seccomp#5 0x7fed2f121f16 in _gen_bpf_chain_lvl_res src/libseccomp/src/gen_bpf.c:977:12
    seccomp#6 0x7fed2f121c74 in _gen_bpf_chain.isra.0 src/libseccomp/src/gen_bpf.c:1124:12
    seccomp#7 0x7fed2f12253c in _gen_bpf_syscall src/libseccomp/src/gen_bpf.c:1520:10
    seccomp#8 0x7fed2f12253c in _gen_bpf_syscalls src/libseccomp/src/gen_bpf.c:1615:18
    seccomp#9 0x7fed2f12253c in _gen_bpf_arch src/libseccomp/src/gen_bpf.c:1683:7
    seccomp#10 0x7fed2f12253c in _gen_bpf_build_bpf src/libseccomp/src/gen_bpf.c:2056:11
    seccomp#11 0x7fed2f12253c in gen_bpf_generate src/libseccomp/src/gen_bpf.c:2321:7
    seccomp#12 0x7fed2f11f41c in seccomp_export_bpf src/libseccomp/src/api.c:724:7

  Uninitialized value was created by a heap allocation
    #0 0x4547ef in realloc (fuzzer+0x4547ef)
    seccomp#1 0x7fed2f121244 in _blk_resize src/libseccomp/src/gen_bpf.c:362:8
    seccomp#2 0x7fed2f121244 in _blk_append src/libseccomp/src/gen_bpf.c:394:6

Signed-off-by: Giuseppe Scrivano <[email protected]>
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