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avcodec/dxtory: Fix negative shift in dx2_decode_slice_410()

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Fixes: left shift of negative value -768
Fixes: 25574/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DXTORY_fuzzer-6012596027916288

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit abebd87764992dc22c82802bdc75d40aac14ab86)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-09-25 20:08:37 +02:00
parent 00440fff9f
commit 92a47b7a82
1 changed files with 1 additions and 1 deletions
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libavcodec/dxtory.c
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@ -399,7 +399,7 @@ static int dx2_decode_slice_410(GetBitContext *gb, int width, int height,
V[x >> 2] = decode_sym(gb, lru[2]) ^ 0x80;
}
Y += ystride << 2;
Y += ystride * 4;
U += ustride;
V += vstride;
}