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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-09-27 23:20:52 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-17 22:34:53 +0300 |
| commit | 3294678d1807eaa05384e2e6c035caa683bbd04c (patch) | |
| tree | ffa60615e84f51ff66a9b9cccba127dc4e10aa25 /libavformat/iff.c | |
| parent | 92a47b7a82ac6c0869e7e072fad1dc9bfd322357 (diff) | |
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>
(cherry picked from commit 24352ca79207d3311ee544fcba908a64004763ef)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavformat/iff.c')
| -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 8ea3b38ac6..55acc0a18d 100644 --- a/libavformat/iff.c +++ b/libavformat/iff.c @@ -384,6 +384,9 @@ 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->codec->codec_type = AVMEDIA_TYPE_AUDIO; |