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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-11 22:58:53 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-11 21:23:49 +0200 |
| commit | f5e2d548f13d211759f5fc45a7f17520dc2686cb (patch) | |
| tree | 254e71e4f5f887cebab3072f80bbe4b741097ff9 | |
| parent | 564a4331fdb511820eda8eb40fa72cfd607a2ba2 (diff) | |
| download | ffmpeg-f5e2d548f13d211759f5fc45a7f17520dc2686cb.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 3ba2aedde3..70622e261b 100644 --- a/libavformat/flvdec.c +++ b/libavformat/flvdec.c @@ -827,6 +827,8 @@ 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) { |