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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-06 01:08:54 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-08-23 13:15:17 +0200 |
| commit | 697187a6f3045dba219dee9a75b8e201af7d6121 (patch) | |
| tree | 8701da338c29267172c3e74c12d393d26c4054cc /libavcodec/snowdec.c | |
| parent | 2b3b77e722e9ffdef7dee9d335ece2e6fd4d6703 (diff) | |
| download | ffmpeg-697187a6f3045dba219dee9a75b8e201af7d6121.tar.gz | |
avcodec/snowdec: Check qbias
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>
Diffstat (limited to 'libavcodec/snowdec.c')
| -rw-r--r-- | libavcodec/snowdec.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libavcodec/snowdec.c b/libavcodec/snowdec.c index c5fa20339a..e915b7b31c 100644 --- a/libavcodec/snowdec.c +++ b/libavcodec/snowdec.c @@ -370,6 +370,11 @@ static int decode_header(SnowContext *s){ s->block_max_depth= 0; 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; } |