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avcodec/takdec: Fix integer overflow 

Fixes: runtime error: signed integer overflow: 512 + 2147483146 cannot be represented in type 'int'
Fixes: 2314/clusterfuzz-testcase-minimized-4519333877252096

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-06-22 21:21:56 +02:00
parent 27f80ab016
commit 0c2ef4f6b4
1 changed files with 1 additions and 1 deletions
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libavcodec/takdec.c
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@ -483,7 +483,7 @@ static int decode_subframe(TAKDecContext *s, int32_t *decoded,
int v = 1 << (filter_quant - 1); int v = 1 << (filter_quant - 1);
if (filter_order & -16) if (filter_order & -16)
v += s->adsp.scalarproduct_int16(&s->residues[i], s->filter, v += (unsigned)s->adsp.scalarproduct_int16(&s->residues[i], s->filter,
filter_order & -16); filter_order & -16);
for (j = filter_order & -16; j < filter_order; j += 4) { for (j = filter_order & -16; j < filter_order; j += 4) {
v += s->residues[i + j + 3] * s->filter[j + 3] + v += s->residues[i + j + 3] * s->filter[j + 3] +