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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-06-14 15:41:33 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-07-10 01:52:56 +0200 |
| commit | c1121e7ec29b78bf96a4411ca378e2336a32dbcd (patch) | |
| tree | 9491e6bd685435ebfe8fec682152238e22df739f | |
| parent | 83260729955b9249599a23be5f9ad4e9051db002 (diff) | |
| download | ffmpeg-c1121e7ec29b78bf96a4411ca378e2336a32dbcd.tar.gz | |
avutil/common: Fix undefined behavior in av_clip_uintp2_c()
Fixes: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself
Fixes: 8521/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DIRAC_fuzzer-5639024952737792
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit aa41d322be71106ce147445f2b42bb763f1eff86)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavutil/common.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavutil/common.h b/libavutil/common.h index 81f5fedf29..ee7028e1fb 100644 --- a/libavutil/common.h +++ b/libavutil/common.h @@ -232,7 +232,7 @@ static av_always_inline av_const int av_clip_intp2_c(int a, int p) */ static av_always_inline av_const unsigned av_clip_uintp2_c(int a, int p) { - if (a & ~((1<<p) - 1)) return -a >> 31 & ((1<<p) - 1); + if (a & ~((1<<p) - 1)) return (~a) >> 31 & ((1<<p) - 1); else return a; } |