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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-11-05 21:22:13 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-11 21:23:48 +0200 |
| commit | 6996bf684e665887f4e25964a7955a62ac6b5b33 (patch) | |
| tree | 17b1ae744b7055118f3ff3ab1a617d9f7beb3817 | |
| parent | a8584c6cbf5250b1f324ac55534c8a2e850c61cd (diff) | |
| download | ffmpeg-6996bf684e665887f4e25964a7955a62ac6b5b33.tar.gz | |
avformat/dsfdec: Check block_align more completely
Fixes: infinite loop
Fixes: 26865/clusterfuzz-testcase-minimized-ffmpeg_dem_DSF_fuzzer-5649473830912000
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 65b8974d54455adc7a462f0f7385b76e1d08101c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/dsfdec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavformat/dsfdec.c b/libavformat/dsfdec.c index 41538fd83c..6ef66ba930 100644 --- a/libavformat/dsfdec.c +++ b/libavformat/dsfdec.c @@ -122,8 +122,8 @@ static int dsf_read_header(AVFormatContext *s) avio_skip(pb, 8); st->codecpar->block_align = avio_rl32(pb); - if (st->codecpar->block_align > INT_MAX / st->codecpar->channels) { - avpriv_request_sample(s, "block_align overflow"); + if (st->codecpar->block_align > INT_MAX / st->codecpar->channels || st->codecpar->block_align <= 0) { + avpriv_request_sample(s, "block_align invalid"); return AVERROR_INVALIDDATA; } st->codecpar->block_align *= st->codecpar->channels; |