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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-31 16:54:06 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-20 14:21:24 +0100 |
| commit | 186df3419c0a2e9b966333b39aa806e1df0afd5d (patch) | |
| tree | f63bfe3cbdd83047084c504126ef69fcf46fa78b /libavcodec | |
| parent | fc22600d5c59b196b4d577d4dc4c675ab5f95b48 (diff) | |
| download | ffmpeg-186df3419c0a2e9b966333b39aa806e1df0afd5d.tar.gz | |
avcodec/jpeg2000dec: Check atom_size in jp2_find_codestream()
Fixes: Infinite loop
Fixes: 29722/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-6412228041506816
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 2a2082a41bca9dbb22c45288972f2da309443cf8)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/jpeg2000dec.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c index ab36009a2d..fad614e03a 100644 --- a/libavcodec/jpeg2000dec.c +++ b/libavcodec/jpeg2000dec.c @@ -2207,8 +2207,12 @@ static int jp2_find_codestream(Jpeg2000DecoderContext *s) return 0; } atom_size = bytestream2_get_be32u(&s->g); + if (atom_size < 16 || (int64_t)bytestream2_tell(&s->g) + atom_size - 16 > INT_MAX) + return AVERROR_INVALIDDATA; atom_end = bytestream2_tell(&s->g) + atom_size - 16; } else { + if (atom_size < 8 || (int64_t)bytestream2_tell(&s->g) + atom_size - 8 > INT_MAX) + return AVERROR_INVALIDDATA; atom_end = bytestream2_tell(&s->g) + atom_size - 8; } |