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authorMichael Niedermayer <michael@niedermayer.cc>2017-05-06 01:08:54 +0200
committerMichael Niedermayer <michael@niedermayer.cc>2017-05-17 20:35:19 +0200
commit93702fd208c6550d89a77d5afc506a2eea2260b3 (patch)
treeee839a6cccbca22a9bb56b7001e158c359b6b6e7 /libavcodec
parent317c043316cd3819e11bb1c401e16bc6f17299a8 (diff)
downloadffmpeg-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.c5
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;
}