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Code Issues Releases Activity

avformat/mxfdec: Ensure klv->key is initialized

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Fixes: read of uninitialized memory
Fixes: 391916474/clusterfuzz-testcase-minimized-ffmpeg_dem_MXF_fuzzer-4935250956845056

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
2025-07-23 13:25:06 +02:00
parent 8b16e1ddd9
commit c6cb3ab7ff
1 changed files with 3 additions and 1 deletions
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4
libavformat/mxfdec.c
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@ -491,7 +491,9 @@ static int klv_read_packet(MXFContext *mxf, KLVPacket *klv, AVIOContext *pb)
return AVERROR_INVALIDDATA;
memcpy(klv->key, mxf_klv_key, 4);
avio_read(pb, klv->key + 4, 12);
int ret = ffio_read_size(pb, klv->key + 4, 12);
if (ret < 0)
return ret;
length = klv_decode_ber_length(pb, &llen);
if (length < 0)
return length;