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avformat/nutdec: Check get_packetheader() in mainheader

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Fixes; Timeout
Fixes: 48794/clusterfuzz-testcase-minimized-ffmpeg_dem_NUT_fuzzer-6524604713140224

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 b5de084aa63b79586bc445e6a7fea837688b3941)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-07-06 23:54:49 +02:00
parent 04dabb241b
commit c39b1d310a
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1 changed files with 2 additions and 0 deletions
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libavformat/nutdec.c
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@ -199,6 +199,8 @@ static int decode_main_header(NUTContext *nut)
int tmp_stream, tmp_mul, tmp_pts, tmp_size, tmp_res, tmp_head_idx;
length = get_packetheader(nut, bc, 1, MAIN_STARTCODE);
if (length == (uint64_t)-1)
return AVERROR_INVALIDDATA;
end = length + avio_tell(bc);
nut->version = ffio_read_varlen(bc);