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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-30 21:50:32 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-17 21:34:53 +0200 |
| commit | 86d0295f38fbfca91107e80ec3cd6d76634f3ebd (patch) | |
| tree | a59a9aefd45e0d2124d644c1224a6281c7707221 | |
| parent | 54a85a4d4f63aefba13fa89f599d046475fec05e (diff) | |
| download | ffmpeg-86d0295f38fbfca91107e80ec3cd6d76634f3ebd.tar.gz | |
avformat/mpc8: Check remaining space in mpc8_parse_seektable()
Fixes: Fixes infinite loop
Fixes: 26704/clusterfuzz-testcase-minimized-ffmpeg_dem_MPC8_fuzzer-6327056939614208
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 4f66dd13d08d063e2748d172239df595078ff624)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/mpc8.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavformat/mpc8.c b/libavformat/mpc8.c index bf597b88a5..e3bb069857 100644 --- a/libavformat/mpc8.c +++ b/libavformat/mpc8.c @@ -177,6 +177,10 @@ static void mpc8_parse_seektable(AVFormatContext *s, int64_t off) av_add_index_entry(s->streams[0], pos, i, 0, 0, AVINDEX_KEYFRAME); } for(; i < size; i++){ + if (get_bits_left(&gb) < 13) { + av_free(buf); + return; + } t = get_unary(&gb, 1, 33) << 12; t += get_bits(&gb, 12); if(t & 1) |