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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-11 22:58:53 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-17 21:34:53 +0200 |
| commit | fc191eeafeffe148c8e9dabc5efdc4466a6f3e71 (patch) | |
| tree | 5629a6b2e87ce7c405d4033ce2eef19aecaf76cc | |
| parent | 3ca8acfe2dbea2d9aabb03951aef70b5078def88 (diff) | |
| download | ffmpeg-fc191eeafeffe148c8e9dabc5efdc4466a6f3e71.tar.gz | |
avformat/flvdec: Check array entry number
Fixes: signed integer overflow: -2147483648 - 1 cannot be represented in type 'int'
Fixes: 30209/clusterfuzz-testcase-minimized-ffmpeg_dem_FLV_fuzzer-5724831658147840
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 b5d8fe1c874947ca67ee8117b18f8052f0e590fc)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/flvdec.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c index 3e9dd6af7f..0a5c0e2d0a 100644 --- a/libavformat/flvdec.c +++ b/libavformat/flvdec.c @@ -718,6 +718,8 @@ static int amf_skip_tag(AVIOContext *pb, AMFDataType type, int depth) parse_name = 0; case AMF_DATA_TYPE_MIXEDARRAY: nb = avio_rb32(pb); + if (nb < 0) + return AVERROR_INVALIDDATA; case AMF_DATA_TYPE_OBJECT: while(!pb->eof_reached && (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY)) { if (parse_name) { |