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avcodec/cavs: Fix runtime error: signed integer overflow: -12648062 * 256 cannot be represented in type 'int' 

Fixes: 2067/clusterfuzz-testcase-minimized-5578430902960128

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 2017-06-05 19:33:56 +02:00
parent 2ef9fc997d
commit 1e6ee86d92
1 changed files with 1 additions and 2 deletions
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3
libavcodec/cavs.c
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@ -537,8 +537,7 @@ void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type)
static inline void scale_mv(AVSContext *h, int *d_x, int *d_y,
cavs_vector *src, int distp)
{
int den = h->scale_den[FFMAX(src->ref, 0)];
int64_t den = h->scale_den[FFMAX(src->ref, 0)];
*d_x = (src->x * distp * den + 256 + FF_SIGNBIT(src->x)) >> 9;
*d_y = (src->y * distp * den + 256 + FF_SIGNBIT(src->y)) >> 9;
}