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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-12-04 00:52:47 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-09 13:53:29 +0200 |
| commit | 35729e0fdb47ca6aeb8cec33b8a35a9448b8b873 (patch) | |
| tree | c0b2c764f7bd311f1ac30b58d9b4823b875e007f | |
| parent | 62dd7e3dc06d12364b820317ce301b9c6684595c (diff) | |
| download | ffmpeg-35729e0fdb47ca6aeb8cec33b8a35a9448b8b873.tar.gz | |
avcodec/wmaprodec: Check packet size
Fixes: left shift of negative value -25824
Fixes: 27754/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_XMA2_fuzzer-5760255962906624
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 69aeba8a19ac2fa6e1c9bdfb19229b513f314bb1)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/wmaprodec.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c index f79f0f2750..9208a9113b 100644 --- a/libavcodec/wmaprodec.c +++ b/libavcodec/wmaprodec.c @@ -1691,6 +1691,12 @@ static int decode_packet(AVCodecContext *avctx, WMAProDecodeCtx *s, } } else { int frame_size; + + if (avpkt->size < s->next_packet_start) { + s->packet_loss = 1; + return AVERROR_INVALIDDATA; + } + s->buf_bit_size = (avpkt->size - s->next_packet_start) << 3; init_get_bits(gb, avpkt->data, s->buf_bit_size); skip_bits(gb, s->packet_offset); |