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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-14 18:41:41 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-10 16:04:26 +0200 |
| commit | 657efee3d42f490ade58704aa4e39b71cabcf909 (patch) | |
| tree | 8bb4f88eee13f6af76c13eaf626e6ed982209470 | |
| parent | d5b6c4dd0ec52151da1f153ffb506e1a7e860071 (diff) | |
| download | ffmpeg-657efee3d42f490ade58704aa4e39b71cabcf909.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 29e2cf8cf4..2dab986f3a 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); |