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avformat/mxfdec: check channel number in mxf_get_d10_aes3_packet()

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Fixes: Out of array access
Fixes: 37030/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5387719147651072

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Tomas Härdin <tjoppen@acc.umu.se>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 3dd5a8a135)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-09-05 21:24:15 +02:00
parent ea7b135a1b
commit c8174013f2
1 changed files with 4 additions and 0 deletions
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4
libavformat/mxfdec.c
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@ -403,6 +403,10 @@ static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt,
data_ptr = pkt->data;
end_ptr = pkt->data + length;
buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
if (st->codec->channels > 8)
return AVERROR_INVALIDDATA;
for (; end_ptr - buf_ptr >= st->codec->channels * 4; ) {
for (i = 0; i < st->codec->channels; i++) {
uint32_t sample = bytestream_get_le32(&buf_ptr);