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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-11 22:58:53 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-06 14:41:41 +0200 |
| commit | c6f7b44202b1ce384d75a9fb4f8e17085e57705f (patch) | |
| tree | 46ca73771a13c04f212be9d90bfbb352818ab5ef | |
| parent | 6537a9300860d1fe25f25b5b308b6f0093a65387 (diff) | |
| download | ffmpeg-c6f7b44202b1ce384d75a9fb4f8e17085e57705f.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 391ab14e17..a7c7192d11 100644 --- a/libavformat/flvdec.c +++ b/libavformat/flvdec.c @@ -877,6 +877,8 @@ 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) { |