diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-16 23:12:42 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-07 23:38:57 +0200 |
| commit | 83b2e4c8f15a00f037040131e26e20de83f0d842 (patch) | |
| tree | fa989ba37807073a670c65c6868df6f757cf0786 /libavformat | |
| parent | 6e859d2bdbce2851ecbf27b3597e1622d2dda10a (diff) | |
avformat/mpegts: use actually read packet size in mpegts_resync special case
Fixes: infinite loop
Fixes: 37986/clusterfuzz-testcase-minimized-ffmpeg_dem_MPEGTSRAW_fuzzer-5292311517462528 -
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Marton Balint <cus@passwd.hu>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavformat')
| -rw-r--r-- | libavformat/mpegts.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c index da8eee2414..9b2930e4d1 100644 --- a/libavformat/mpegts.c +++ b/libavformat/mpegts.c @@ -2875,8 +2875,8 @@ static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *curren int64_t back = FFMIN(seekback, pos); //Special case for files like 01c56b0dc1.ts - if (current_packet[0] == 0x80 && current_packet[12] == 0x47) { - avio_seek(pb, 12 - back, SEEK_CUR); + if (current_packet[0] == 0x80 && current_packet[12] == 0x47 && pos >= TS_PACKET_SIZE) { + avio_seek(pb, 12 - TS_PACKET_SIZE, SEEK_CUR); return 0; } |