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avcodec/apedec: Fix undefined integer overflow in long_filter_ehigh_3830()

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Fixes: signed integer overflow: -1094995529 * 2 cannot be represented in type 'int'
Fixes: 18281/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5692589180715008

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 1d1719a44d)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-10-17 20:56:23 +02:00
parent 120ab2375c
commit 53f61bdcea
1 changed files with 2 additions and 1 deletions
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3
libavcodec/apedec.c
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@ -916,7 +916,8 @@ static void long_filter_ehigh_3830(int32_t *buffer, int length)
{ {
int i, j; int i, j;
int32_t dotprod, sign; int32_t dotprod, sign;
int32_t coeffs[8] = { 0 }, delay[8] = { 0 }; int32_t delay[8] = { 0 };
uint32_t coeffs[8] = { 0 };
for (i = 0; i < length; i++) { for (i = 0; i < length; i++) {
dotprod = 0; dotprod = 0;