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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-11-05 22:14:21 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-09 22:02:19 +0200 |
| commit | 896720925a014c891d2e6a9e3e33a5fa6b0fc40c (patch) | |
| tree | 204c325d091b1474a8026fd3e567034341f46d71 | |
| parent | 05ca3ac92143a50c143341d9a87364561ec48c62 (diff) | |
| download | ffmpeg-896720925a014c891d2e6a9e3e33a5fa6b0fc40c.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 1364049fe4..825d2b21ad 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++){ |