diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-13 23:21:24 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-14 12:20:16 +0200 |
| commit | 79bfa4a6636a095595254928a8b839975ee49ce8 (patch) | |
| tree | a136a90de87a68e89f89e36386acb3cf6e466a97 | |
| parent | ea57abac8d9243d8367e274d088e80244b00ff81 (diff) | |
| download | ffmpeg-79bfa4a6636a095595254928a8b839975ee49ce8.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 e2769c0bf9..147d85f15b 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; |