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avcodec/sbrdsp_fixed: Fix integer overflow in sbr_hf_apply_noise()

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Fixes: runtime error: signed integer overflow: -2049425300 + -117591631 cannot be represented in type 'int'
Fixes: part of 2096/clusterfuzz-testcase-minimized-4901566068817920

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 2061de8a3f)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-07-02 03:30:54 +02:00
parent 2170bdb56d
commit 0ddff40bf8
1 changed files with 2 additions and 2 deletions
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libavcodec/sbrdsp_fixed.c
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@ -253,8 +253,8 @@ static av_always_inline int sbr_hf_apply_noise(int (*Y)[2],
int m; int m;
for (m = 0; m < m_max; m++) { for (m = 0; m < m_max; m++) {
int y0 = Y[m][0]; unsigned y0 = Y[m][0];
int y1 = Y[m][1]; unsigned y1 = Y[m][1];
noise = (noise + 1) & 0x1ff; noise = (noise + 1) & 0x1ff;
if (s_m[m].mant) { if (s_m[m].mant) {
int shift, round; int shift, round;