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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-03-03 10:49:03 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-03-03 16:54:20 +0100 |
| commit | fdcb966f4a3c6f872891b8dd554e3652b9e02d4f (patch) | |
| tree | 7a3cf1e3f04bcb91f28ece03d2486237478e9bdc | |
| parent | 6a3f345c1ab78428b970775a6632362b8515dd04 (diff) | |
| download | ffmpeg-fdcb966f4a3c6f872891b8dd554e3652b9e02d4f.tar.gz | |
avformat/dcstr: Check sample rate
Fixes: signed integer overflow: -1300248894420254720 * 16 cannot be represented in type 'long'
Fixes: 30879/clusterfuzz-testcase-minimized-ffmpeg_dem_DCSTR_fuzzer-5094464215449600
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/dcstr.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/dcstr.c b/libavformat/dcstr.c index 9041a86539..9ddccc7f2d 100644 --- a/libavformat/dcstr.c +++ b/libavformat/dcstr.c @@ -43,6 +43,8 @@ static int dcstr_read_header(AVFormatContext *s) st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; st->codecpar->channels = avio_rl32(s->pb); st->codecpar->sample_rate = avio_rl32(s->pb); + if (st->codecpar->sample_rate <= 0) + return AVERROR_INVALIDDATA; codec = avio_rl32(s->pb); align = avio_rl32(s->pb); avio_skip(s->pb, 4); |