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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-14 18:41:41 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-09 13:53:29 +0200 |
| commit | 268f25c7744c7a0cc79d6baf18ff6af600826fad (patch) | |
| tree | 3c2f399fb2b33150a97cc34f740e9d0e8818a6de | |
| parent | d72a06402c2de9bb8b319f460258efaee8300425 (diff) | |
| download | ffmpeg-268f25c7744c7a0cc79d6baf18ff6af600826fad.tar.gz | |
avformat/bfi: Check chunk_header
Fixes: signed integer overflow: -2147483648 - 3 cannot be represented in type 'int'
Fixes: 26910/clusterfuzz-testcase-minimized-ffmpeg_dem_BFI_fuzzer-6665764123836416
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 638a151a877c27a46c15643db26c9ba726feecde)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/bfi.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavformat/bfi.c b/libavformat/bfi.c index 6c98e33ab4..9d88533acf 100644 --- a/libavformat/bfi.c +++ b/libavformat/bfi.c @@ -69,6 +69,9 @@ static int bfi_read_header(AVFormatContext * s) /* Set the total number of frames. */ avio_skip(pb, 8); chunk_header = avio_rl32(pb); + if (chunk_header < 3) + return AVERROR_INVALIDDATA; + bfi->nframes = avio_rl32(pb); avio_rl32(pb); avio_rl32(pb); |