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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-07 21:50:03 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-09 19:37:27 +0100 |
| commit | 2c8cd4490a6ab2742e6ad1ce059b4f4957b39500 (patch) | |
| tree | 4ac5ac9efb96f9e3c5826585237ca72ff93df2a0 | |
| parent | 7e5034f97e41d3f8112c1f8da3b5274ab99ef6f8 (diff) | |
| download | ffmpeg-2c8cd4490a6ab2742e6ad1ce059b4f4957b39500.tar.gz | |
avformat/asfdec_f: Add an additional check for the extradata size
Fixes: OOM
Fixes: 30066/clusterfuzz-testcase-minimized-ffmpeg_dem_ASF_fuzzer-6182309126602752
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/asfdec_f.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/asfdec_f.c b/libavformat/asfdec_f.c index 8e48e457d9..b584f60195 100644 --- a/libavformat/asfdec_f.c +++ b/libavformat/asfdec_f.c @@ -516,6 +516,8 @@ static int asf_read_stream_properties(AVFormatContext *s, int64_t size) tag1 = avio_rl32(pb); avio_skip(pb, 20); if (sizeX > 40) { + if (size < sizeX - 40) + return AVERROR_INVALIDDATA; st->codecpar->extradata_size = ffio_limit(pb, sizeX - 40); st->codecpar->extradata = av_mallocz(st->codecpar->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE); |