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avcodec/mv30: Use unsigned in idct_1d()

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Fixes: signed integer overflow: 2110302399 + 39074947 cannot be represented in type 'int'
Fixes: 27330/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MV30_fuzzer-5664923153334272

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 2eb641741766e98401f2a9d9a91c7afbdcb67d4b)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-11-14 21:10:18 +01:00
parent e0c1af04b2
commit 7612e1b4e5
1 changed files with 1 additions and 1 deletions
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libavcodec/mv30.c
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@ -102,7 +102,7 @@ static void get_qtable(int16_t *table, int quant, const uint8_t *quant_tab)
}
}
static inline void idct_1d(int *blk, int step)
static inline void idct_1d(unsigned *blk, int step)
{
const unsigned t0 = blk[0 * step] + blk[4 * step];
const unsigned t1 = blk[0 * step] - blk[4 * step];