diff options
| author | Michael Niedermayer <[email protected]> | 2017-08-28 00:30:33 +0200 |
|---|---|---|
| committer | Michael Niedermayer <[email protected]> | 2017-08-29 21:21:05 +0200 |
| commit | e89125faba1a1b3048fbd3e58376ce27f9586d9c (patch) | |
| tree | 8da79fe44404b9435456370fbd9d848f4fbac73d | |
| parent | 51ee15df5813c6e6225b7dcb74e085eb782e60af (diff) | |
avcodec/snowdec: Fix integer overflow in decode_subband_slice_buffered()
Fixes: runtime error: signed integer overflow: 267 * 8388608 cannot be represented in type 'int'
Fixes: 2743/clusterfuzz-testcase-minimized-5820652076400640
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <[email protected]>
(cherry picked from commit 732f9764561558a388c05483ed6a722a5c67b05c)
Signed-off-by: Michael Niedermayer <[email protected]>
| -rw-r--r-- | libavcodec/snowdec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/snowdec.c b/libavcodec/snowdec.c index 4ebfa07c6a..0ac0b55012 100644 --- a/libavcodec/snowdec.c +++ b/libavcodec/snowdec.c @@ -140,7 +140,7 @@ static inline void decode_subband_slice_buffered(SnowContext *s, SubBand *b, sli v = b->x_coeff[new_index].coeff; x = b->x_coeff[new_index++].x; while(x < w){ - register int t= ( (v>>1)*qmul + qadd)>>QEXPSHIFT; + register int t= (int)( (v>>1)*(unsigned)qmul + qadd)>>QEXPSHIFT; register int u= -(v&1); line[x] = (t^u) - u; |