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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-06-14 15:41:33 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-06-18 01:16:04 +0200 |
| commit | 84d473a9cfc61c4b4f1557f41462d02088b94614 (patch) | |
| tree | a1ac4f45d3c6d0b9b6f03b53c6cd82f8b68cab43 | |
| parent | f35fb0c82692165df5ffe1cd086a1a89a856c8d5 (diff) | |
| download | ffmpeg-84d473a9cfc61c4b4f1557f41462d02088b94614.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 53e43feb3a..58ead80514 100644 --- a/libavutil/common.h +++ b/libavutil/common.h @@ -228,7 +228,7 @@ 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; } |