virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-01-24 13:56:33 +02:00
Code Issues Releases Activity

avcodec/snowdec: Check qbias

Browse Source 
Fixes: signed integer overflow: -1094995529 * 131 cannot be represented in type 'int'
Fixes: 1353/clusterfuzz-testcase-minimized-5208180449607680

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 523205ce1ed9415183c162998c68f573479e78fe)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-06 01:08:54 +02:00
parent 5dec065a4d
commit acb589b12d
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
libavcodec/snowdec.c
View File

@ -392,6 +392,11 @@ static int decode_header(SnowContext *s){
s->block_max_depth= 0; s->block_max_depth= 0;
return AVERROR_INVALIDDATA; return AVERROR_INVALIDDATA;
} }
if (FFABS(s->qbias) > 127) {
av_log(s->avctx, AV_LOG_ERROR, "qbias %d is too large\n", s->qbias);
s->qbias = 0;
return AVERROR_INVALIDDATA;
}
return 0; return 0;
} }