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avcodec/opus_silk: Fix integer overflow and out of array read 

Fixes: 1362/clusterfuzz-testcase-minimized-6097275002552320

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 4654baff12)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-06 14:28:20 +02:00
parent a88859aabb
commit 0c95ae971e
1 changed files with 1 additions and 2 deletions
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3
libavcodec/opus_silk.c
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@ -851,8 +851,7 @@ static inline void silk_stabilize_lsf(int16_t nlsf[16], int order, const uint16_
if (nlsf[0] < min_delta[0])
nlsf[0] = min_delta[0];
for (i = 1; i < order; i++)
if (nlsf[i] < nlsf[i - 1] + min_delta[i])
nlsf[i] = nlsf[i - 1] + min_delta[i];
nlsf[i] = FFMAX(nlsf[i], FFMIN(nlsf[i - 1] + min_delta[i], 32767));
/* push backwards to increase distance */
if (nlsf[order-1] > 32768 - min_delta[order])