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avformat/mxfdec: Check avio_read() success in mxf_decrypt_triplet()

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Fixes: Use of uninitialized memory
Fixes: 71444/clusterfuzz-testcase-minimized-ffmpeg_dem_MXF_fuzzer-5448597561212928

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-09-23 20:05:37 +02:00
parent 90ff3ae976
commit 6ecc96f4d0
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GPG Key ID: B18E8928B3948D64
1 changed files with 2 additions and 1 deletions
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libavformat/mxfdec.c
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@ -697,7 +697,8 @@ static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv
if (size < 32 || size - 32 < orig_size || (int)orig_size != orig_size)
return AVERROR_INVALIDDATA;
avio_read(pb, ivec, 16);
avio_read(pb, tmpbuf, 16);
if (avio_read(pb, tmpbuf, 16) != 16)
return AVERROR_INVALIDDATA;
if (mxf->aesc)
av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
if (memcmp(tmpbuf, checkv, 16))