diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-07-16 02:08:50 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-07-19 15:26:37 +0200 |
| commit | 064d0c64628216b06ff96a0ddea494dfb09b0535 (patch) | |
| tree | 8dfb89c0959417d637b3288fc80db1850ecd3cd7 | |
| parent | 9ce4350c48d508b1881d2038a4e2764dde514d54 (diff) | |
| download | ffmpeg-064d0c64628216b06ff96a0ddea494dfb09b0535.tar.gz | |
avcodec/ffv1dec_template: Fix signed integer overflow
Fixes: runtime error: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself
Fixes: 2634/clusterfuzz-testcase-minimized-4540890636877824
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 4de4308d2aa3bfaa286ab566caf087d523cf9a85)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/ffv1dec_template.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/ffv1dec_template.c b/libavcodec/ffv1dec_template.c index 21af155bba..892ccf22fa 100644 --- a/libavcodec/ffv1dec_template.c +++ b/libavcodec/ffv1dec_template.c @@ -96,7 +96,7 @@ static av_always_inline void RENAME(decode_line)(FFV1Context *s, int w, } if (sign) - diff = -diff; + diff = -(unsigned)diff; sample[1][x] = av_mod_uintp2(RENAME(predict)(sample[1] + x, sample[0] + x) + diff, bits); } |