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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-13 23:21:24 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-17 20:35:20 +0200 |
| commit | e1fcdf1930a7ac4639bd98f763bdb1a12661ea22 (patch) | |
| tree | bd449eef77269b166b838af1889a320c8f18dd1a | |
| parent | f857975bfd2c5e072e282c004f0a6e15ae8192a2 (diff) | |
| download | ffmpeg-e1fcdf1930a7ac4639bd98f763bdb1a12661ea22.tar.gz | |
avcodec/webp: Fix signedness in prefix_code check
Fixes: out of array read
Fixes: 1557/clusterfuzz-testcase-minimized-6535013757616128
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 8c5cd1c9d33b4b287f85d42efb1aecfaee31de6c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/webp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/webp.c b/libavcodec/webp.c index f19e448504..cf8fadd098 100644 --- a/libavcodec/webp.c +++ b/libavcodec/webp.c @@ -694,7 +694,7 @@ static int decode_entropy_coded_image(WebPContext *s, enum ImageRole role, length = offset + get_bits(&s->gb, extra_bits) + 1; } prefix_code = huff_reader_get_symbol(&hg[HUFF_IDX_DIST], &s->gb); - if (prefix_code > 39) { + if (prefix_code > 39U) { av_log(s->avctx, AV_LOG_ERROR, "distance prefix code too large: %d\n", prefix_code); return AVERROR_INVALIDDATA; |