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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-30 21:50:32 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-02 14:18:21 +0100 |
| commit | 40ad3111be0d9d10bafa5463e404ec39bb518305 (patch) | |
| tree | 5b4c77dabf6d67276255d67b1b64301293b6da13 | |
| parent | b9ea0689ea5829565fbf694ec83679926314afec (diff) | |
| download | ffmpeg-40ad3111be0d9d10bafa5463e404ec39bb518305.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 333aa180a4..99f713eb76 100644 --- a/libavformat/mpc8.c +++ b/libavformat/mpc8.c @@ -178,6 +178,10 @@ 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) |