[FFmpeg-cvslog] avcodec/h264idct_template: Fix integer overflow in ff_h264_chroma422_dc_dequant_idct()
Michael Niedermayer
git at videolan.org
Tue Oct 20 17:27:47 EEST 2020
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Thu Oct 15 21:35:43 2020 +0200| [d1983628394e076001cc67d85656f9842b7282a3] | committer: Michael Niedermayer
avcodec/h264idct_template: Fix integer overflow in ff_h264_chroma422_dc_dequant_idct()
Fixes: signed integer overflow: 241173056 + 1953511200 cannot be represented in type 'int'
Fixes: 26086/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_H264_fuzzer-5068366420901888
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d1983628394e076001cc67d85656f9842b7282a3
---
libavcodec/h264idct_template.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/h264idct_template.c b/libavcodec/h264idct_template.c
index 5993ae2e6e..f19579a47c 100644
--- a/libavcodec/h264idct_template.c
+++ b/libavcodec/h264idct_template.c
@@ -278,7 +278,7 @@ void FUNCC(ff_h264_chroma422_dc_dequant_idct)(int16_t *_block, int qmul){
const int stride= 16*2;
const int xStride= 16;
int i;
- int temp[8];
+ unsigned temp[8];
static const uint8_t x_offset[2]={0, 16};
dctcoef *block = (dctcoef*)_block;
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