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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-12-04 00:52:47 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-17 21:34:53 +0200 |
| commit | 93cdec591b98fa39ce7e056f5c868a676e6f7c17 (patch) | |
| tree | c23d35a21fb85110ec3e7f37e84f78d826965342 | |
| parent | 9dc6c0d8d0265844536aa2674af021be26531e34 (diff) | |
| download | ffmpeg-93cdec591b98fa39ce7e056f5c868a676e6f7c17.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 b3f4c8f59a..9f74914b26 100644 --- a/libavcodec/wmaprodec.c +++ b/libavcodec/wmaprodec.c @@ -1607,6 +1607,12 @@ static int decode_packet(AVCodecContext *avctx, void *data, } 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); |