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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-06-09 21:25:58 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-06-18 20:53:56 +0200 |
| commit | 29d3e924a666c5837bd3cce48631da66e5ddbc50 (patch) | |
| tree | d9cd9ba0a410396a17f7d633d5224b2417392e43 | |
| parent | d91f3644ce3b32adcc31b2f559b6c82f1d5b567e (diff) | |
| download | ffmpeg-29d3e924a666c5837bd3cce48631da66e5ddbc50.tar.gz | |
avcodec/faxcompr: Check available bits in decode_uncompressed()
Fixes: Timeout
Fixes: 34950/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5686764151898112
Fixes: 34966/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-4587409334468608
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 ff56c139e07a4de2803b974b6595f6b71fbf53bd)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/faxcompr.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/faxcompr.c b/libavcodec/faxcompr.c index 45e0c482d7..44c1f6f6b9 100644 --- a/libavcodec/faxcompr.c +++ b/libavcodec/faxcompr.c @@ -144,6 +144,8 @@ static int decode_uncompressed(AVCodecContext *avctx, GetBitContext *gb, return AVERROR_INVALIDDATA; } cwi = 10 - av_log2(cwi); + if (get_bits_left(gb) < cwi + 1) + return AVERROR_INVALIDDATA; skip_bits(gb, cwi + 1); if (cwi > 5) { newmode = get_bits1(gb); |