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avformat/mov: Check for EOF in mov_read_glbl()
Fixes: Infinite loop Fixes: 41351/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-5433895854669824 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 59b4e7cbd87889c0bac710ac7f62782b637419a1) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -1700,6 +1700,8 @@ static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
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// wrap a whole fiel atom inside of a glbl atom.
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unsigned size = avio_rb32(pb);
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unsigned type = avio_rl32(pb);
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if (avio_feof(pb))
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return AVERROR_INVALIDDATA;
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avio_seek(pb, -8, SEEK_CUR);
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if (type == MKTAG('f','i','e','l') && size == atom.size)
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return mov_read_default(c, pb, atom);
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