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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-06 01:08:54 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-17 20:35:19 +0200 |
| commit | 93702fd208c6550d89a77d5afc506a2eea2260b3 (patch) | |
| tree | ee839a6cccbca22a9bb56b7001e158c359b6b6e7 /libavcodec | |
| parent | 317c043316cd3819e11bb1c401e16bc6f17299a8 (diff) | |
| download | ffmpeg-93702fd208c6550d89a77d5afc506a2eea2260b3.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')
| -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 042aecbbeb..97f55288c1 100644 --- a/libavcodec/snowdec.c +++ b/libavcodec/snowdec.c @@ -395,6 +395,11 @@ 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; } |