diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-17 15:15:08 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-11-14 17:51:35 +0100 |
| commit | 97c3053d59f30f84b30efcc73ccf1b2e84b89006 (patch) | |
| tree | 4e64226ab3769bba12c9c105a76a288d19fd3863 | |
| parent | 866ad2e95262606b194cb2e79ce8a7e63c32ce06 (diff) | |
| download | ffmpeg-97c3053d59f30f84b30efcc73ccf1b2e84b89006.tar.gz | |
avformat/dhav: Limit get_duration() iterations
Fixes: Timeout
Fixes: 39971/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-5756969890217984
Fixes: 39977/clusterfuzz-testcase-minimized-ffmpeg_dem_DHAV_fuzzer-5327123053674496
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/dhav.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libavformat/dhav.c b/libavformat/dhav.c index b6bb25204c..6c1cdde32c 100644 --- a/libavformat/dhav.c +++ b/libavformat/dhav.c @@ -234,12 +234,13 @@ static int64_t get_duration(AVFormatContext *s) int64_t start_pos = avio_tell(s->pb); int64_t start = 0, end = 0; struct tm timeinfo; + int max_interations = 100000; if (!s->pb->seekable) return 0; avio_seek(s->pb, avio_size(s->pb) - 8, SEEK_SET); - while (avio_tell(s->pb) > 12) { + while (avio_tell(s->pb) > 12 && max_interations--) { if (avio_rl32(s->pb) == MKTAG('d','h','a','v')) { int seek_back = avio_rl32(s->pb); |