RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

avcodec/wmalosslessdec: Fixes undefined overflow in dequantization in decode_subframe() 

Fixes: signed integer overflow: 47875596 * 45 cannot be represented in type 'int'
Fixes: 19082/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMALOSSLESS_fuzzer-5687766512041984

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 53efab44a9)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-11-29 22:45:07 +01:00
parent 9bea771035
commit 525a8ee3d8
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libavcodec/wmalosslessdec.c
View File

@ -979,7 +979,7 @@ static int decode_subframe(WmallDecodeCtx *s)
if (s->quant_stepsize != 1)
for (i = 0; i < s->num_channels; i++)
for (j = 0; j < subframe_len; j++)
s->channel_residues[i][j] *= s->quant_stepsize;
s->channel_residues[i][j] *= (unsigned)s->quant_stepsize;
}
/* Write to proper output buffer depending on bit-depth */