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avformat/asfdec_o: Check for EOF in asf_read_marker()

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Fixes: Timeout
Fixes: 26460/clusterfuzz-testcase-minimized-ffmpeg_dem_ASF_O_fuzzer-5710884393189376

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 9e3d09f435)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-01-20 00:00:27 +01:00
parent a5d1613f48
commit 6cd5bfe3cd
1 changed files with 3 additions and 0 deletions
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3
libavformat/asfdec_o.c
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@ -245,6 +245,9 @@ static int asf_read_marker(AVFormatContext *s, const GUIDParseTable *g)
avio_skip(pb, 4); // flags
len = avio_rl32(pb);
if (avio_feof(pb))
return AVERROR_INVALIDDATA;
if ((ret = avio_get_str16le(pb, len, name,
sizeof(name))) < len)
avio_skip(pb, len - ret);