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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-11-05 22:14:21 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-11 21:23:48 +0200 |
| commit | d4eaf3346f89490597e280ef9c20c83bf435e96f (patch) | |
| tree | 6a163f4ec3f82e1f1c3a86ea16be2abcdb7fa129 | |
| parent | 6996bf684e665887f4e25964a7955a62ac6b5b33 (diff) | |
| download | ffmpeg-d4eaf3346f89490597e280ef9c20c83bf435e96f.tar.gz | |
avcodec/h264idct_template: Fix integer overflow in ff_h264_chroma422_dc_dequant_idct()
Fixes: signed integer overflow: -2105540608 - 2105540608 cannot be represented in type 'int'
Fixes: 26870/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_H264_fuzzer-5656647567147008
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 51dfd6f1bdb03bfc7574b12e921fb3b8639ba5cf)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/h264idct_template.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/h264idct_template.c b/libavcodec/h264idct_template.c index f19579a47c..ce66ed3ab8 100644 --- a/libavcodec/h264idct_template.c +++ b/libavcodec/h264idct_template.c @@ -283,8 +283,8 @@ void FUNCC(ff_h264_chroma422_dc_dequant_idct)(int16_t *_block, int qmul){ dctcoef *block = (dctcoef*)_block; for(i=0; i<4; i++){ - temp[2*i+0] = block[stride*i + xStride*0] + block[stride*i + xStride*1]; - temp[2*i+1] = block[stride*i + xStride*0] - block[stride*i + xStride*1]; + temp[2*i+0] = block[stride*i + xStride*0] + (unsigned)block[stride*i + xStride*1]; + temp[2*i+1] = block[stride*i + xStride*0] - (unsigned)block[stride*i + xStride*1]; } for(i=0; i<2; i++){ |