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BUG: the code under tools/ needs to be made to work with non-native byte ordering #9

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pcmoore opened this issue Aug 13, 2015 · 3 comments
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BUG: the code under tools/ needs to be made to work with non-native byte ordering #9

pcmoore opened this issue Aug 13, 2015 · 3 comments
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pcmoore commented Aug 13, 2015

See the mail list thread linked below for more information.
@pcmoore pcmoore added the bug label Aug 13, 2015
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pcmoore commented Sep 1, 2015

Actually, upon closer examination it appears the issue isn't tools/ failing on non-native systems (they work correctly), the problem appears related to 9013ff7.

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pcmoore commented Sep 1, 2015

This may be fixed by 0d8504b, waiting on confirmation.

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pcmoore commented Feb 9, 2016

I believe we have resolved this, if not we can reopen this issue.

@pcmoore pcmoore closed this as completed Feb 9, 2016
@pcmoore pcmoore self-assigned this Feb 9, 2016
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 <gscrivan@redhat.com>
@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 <gscrivan@redhat.com>
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