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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-07-25 15:50:54 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-09 22:02:21 +0200 |
| commit | 41d43bf61032ca747c8aa226e62c2635eab9ab86 (patch) | |
| tree | d0bebc204a193391ec3b1cc3d4c04a7cf40a748e | |
| parent | 3b8f82d437801c4b8252bbcf053b59f4719e12cd (diff) | |
| download | ffmpeg-41d43bf61032ca747c8aa226e62c2635eab9ab86.tar.gz | |
avcodec/webp: Check available space in loop in decode_entropy_coded_image()
Fixes: Timeout
Fixes: 35401/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WEBP_fuzzer-5714401821851648
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 5e00eab61112c52f27a09fe77d50e6fc508f9c53)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/webp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/webp.c b/libavcodec/webp.c index 3d63cb8349..5849241f9c 100644 --- a/libavcodec/webp.c +++ b/libavcodec/webp.c @@ -664,6 +664,9 @@ static int decode_entropy_coded_image(WebPContext *s, enum ImageRole role, while (y < img->frame->height) { int v; + if (get_bits_left(&s->gb) < 0) + return AVERROR_INVALIDDATA; + hg = get_huffman_group(s, img, x, y); v = huff_reader_get_symbol(&hg[HUFF_IDX_GREEN], &s->gb); if (v < NUM_LITERAL_CODES) { |