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avcodec/dcadsp: Fix integer overflow in dmix_add_c() 

Fixes: signed integer overflow: 1515225320 + 759416059 cannot be represented in type 'int'
Fixes: 29256/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DCA_fuzzer-5719088561258496

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 b4ebf483bc)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-01-30 19:09:36 +01:00
parent b2c3461b57
commit a0bda2923b
1 changed files with 1 additions and 1 deletions
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libavcodec/dcadsp.c
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@ -328,7 +328,7 @@ static void dmix_add_c(int32_t *dst, const int32_t *src, int coeff, ptrdiff_t le
int i; int i;
for (i = 0; i < len; i++) for (i = 0; i < len; i++)
dst[i] += mul15(src[i], coeff); dst[i] += (unsigned)mul15(src[i], coeff);
} }
static void dmix_scale_c(int32_t *dst, int scale, ptrdiff_t len) static void dmix_scale_c(int32_t *dst, int scale, ptrdiff_t len)