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avcodec/celp_filters: Fix runtime error: signed integer overflow: 1892453989 + 381702783 cannot be represented in type 'int'

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Fixes: 1766/clusterfuzz-testcase-minimized-6562020075765760

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 2017-05-23 14:50:55 +02:00
parent 948b54763b
commit fb75ad79cb
1 changed files with 1 additions and 1 deletions
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2
libavcodec/celp_filters.c
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@ -67,7 +67,7 @@ int ff_celp_lp_synthesis_filter(int16_t *out, const int16_t *filter_coeffs,
for (n = 0; n < buffer_length; n++) {
int sum = -rounder, sum1;
for (i = 1; i <= filter_length; i++)
sum += filter_coeffs[i-1] * out[n-i];
sum += (unsigned)(filter_coeffs[i-1] * out[n-i]);
sum1 = ((-sum >> 12) + in[n]) >> shift;
sum = av_clip_int16(sum1);