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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-12-12 01:24:42 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-09 13:53:29 +0200 |
| commit | 0fb1a9f6ecfc753824b707a4c251b5abe37acd0e (patch) | |
| tree | 83d79ed3d66b8d04c6061ad3bcacea504c6ecdaf | |
| parent | 1506eb092b45245a0bab1b7be0d856649dc38dff (diff) | |
| download | ffmpeg-0fb1a9f6ecfc753824b707a4c251b5abe37acd0e.tar.gz | |
avformat/voc_packet: Add a basic check on max_size
Fixes: signed integer overflow: -2147483648 - 4 cannot be represented in type 'int'
Fixes: 28127/clusterfuzz-testcase-minimized-ffmpeg_dem_VOC_fuzzer-4880586455646208
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 52f75181bfada2b4b127e744674591c7753c4b7d)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/voc_packet.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/voc_packet.c b/libavformat/voc_packet.c index 1e2e19e1c3..9d7d2025cd 100644 --- a/libavformat/voc_packet.c +++ b/libavformat/voc_packet.c @@ -44,6 +44,8 @@ ff_voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size) AVINDEX_KEYFRAME); while (!voc->remaining_size) { + if (max_size < 4) + max_size = 0; type = avio_r8(pb); if (type == VOC_TYPE_EOF) return AVERROR_EOF; |