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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-02 14:59:15 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-04 16:54:11 +0200 |
| commit | acd735efaf0ceba95c3f07751182af485af993d2 (patch) | |
| tree | 1432eeeec5779b0c158d7694ce8c5473cccd9f5e | |
| parent | 3291d994b76db4b6e67c8467367ce68f79785e60 (diff) | |
| download | ffmpeg-acd735efaf0ceba95c3f07751182af485af993d2.tar.gz | |
avformat/moflex: Check m->size before seeking
Fixes: Infinite loop
Fixes: 26016/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-6195663833137152
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/moflex.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libavformat/moflex.c b/libavformat/moflex.c index 937f63cb63..a24e12eb8e 100644 --- a/libavformat/moflex.c +++ b/libavformat/moflex.c @@ -342,8 +342,11 @@ static int moflex_read_packet(AVFormatContext *s, AVPacket *pkt) m->in_block = 0; - if (m->flags % 2 == 0) + if (m->flags % 2 == 0) { + if (m->size <= 0) + return AVERROR_INVALIDDATA; avio_seek(pb, m->pos + m->size, SEEK_SET); + } } return AVERROR_EOF; |