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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-08-01 21:42:53 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-06 14:54:16 +0300 |
| commit | ab78ddd4c1c017d8b0e4090361c83875c81dc208 (patch) | |
| tree | b54118a6f433b14f93bf5410d04198a72f56f898 | |
| parent | 1f1318971e1d7683d8930712eb06c8d12b2a0b48 (diff) | |
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>
(cherry picked from commit 89505d38de989bddd579ce3b841f1c011f1d7bf2)
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 9e4e435221..58187b9184 100644 --- a/libavformat/wtvdec.c +++ b/libavformat/wtvdec.c @@ -661,6 +661,8 @@ 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); |