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avformat/mxfdec: Check that key was read sucessfull

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Fixes: use of uninitialized value
Fixes: 70932/clusterfuzz-testcase-minimized-ffmpeg_dem_MXF_fuzzer-4870202133643264

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 4c62cbcae2)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-08-11 22:53:47 +02:00
parent aeb8631048
commit 14af28c2f5
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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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@ -1530,7 +1530,8 @@ static int mxf_read_indirect_value(void *arg, AVIOContext *pb, int size)
if (size <= 17)
return 0;
avio_read(pb, key, 17);
if (avio_read(pb, key, 17) != 17)
return AVERROR_INVALIDDATA;
/* TODO: handle other types of of indirect values */
if (memcmp(key, mxf_indirect_value_utf16le, 17) == 0) {
return mxf_read_utf16le_string(pb, size - 17, &tagged_value->value);