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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-09-27 22:20:52 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-09-28 20:22:30 +0200 |
| commit | 24352ca79207d3311ee544fcba908a64004763ef (patch) | |
| tree | 7804d9d068b4796b716bdb47fd854acdae3a8c81 | |
| parent | 56ff01e6ec915963b467d3d2d488e400f67f46a3 (diff) | |
| download | ffmpeg-24352ca79207d3311ee544fcba908a64004763ef.tar.gz | |
avformat/iff: Check data_size not overflowing int64
Fixes: Infinite loop
Fixes: 25844/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5660803318153216
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/iff.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavformat/iff.c b/libavformat/iff.c index 7feb121cd0..04fe8be4eb 100644 --- a/libavformat/iff.c +++ b/libavformat/iff.c @@ -449,6 +449,9 @@ static int iff_read_header(AVFormatContext *s) data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb); orig_pos = avio_tell(pb); + if (data_size >= INT64_MAX) + return AVERROR_INVALIDDATA; + switch(chunk_id) { case ID_VHDR: st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |