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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-08-01 20:42:53 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-08-06 21:04:43 +0200 |
| commit | 89505d38de989bddd579ce3b841f1c011f1d7bf2 (patch) | |
| tree | 375cfe3fbc80712c33f2c2ea10a37711bdde20cc | |
| parent | 2bbef69b0ba938cce4f9d61bed46d3f3058e56c2 (diff) | |
| download | ffmpeg-89505d38de989bddd579ce3b841f1c011f1d7bf2.tar.gz | |
avformat/wtvdec: Check for EOF before seeking back in parse_media_type()
Fixes: Infinite loop
Fixes: 36311/clusterfuzz-testcase-minimized-ffmpeg_dem_WTV_fuzzer-4889181296918528
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/wtvdec.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/wtvdec.c b/libavformat/wtvdec.c index a549681322..191da2718b 100644 --- a/libavformat/wtvdec.c +++ b/libavformat/wtvdec.c @@ -652,6 +652,8 @@ static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid, avio_skip(pb, size - 32); ff_get_guid(pb, &actual_subtype); ff_get_guid(pb, &actual_formattype); + if (avio_feof(pb)) + return NULL; avio_seek(pb, -size, SEEK_CUR); st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32); |