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oggparseogm: check timing variables

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Fixes a potential divide by zero.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC:libav-stable@libav.org
This commit is contained in:
Anton Khirnov
2013-11-28 10:54:35 +01:00
parent 8058284ce0
commit 75647dea6f
1 changed files with 5 additions and 0 deletions
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5
libavformat/oggparseogm.c
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@@ -75,6 +75,11 @@ ogm_header(AVFormatContext *s, int idx)
time_unit = bytestream2_get_le64(&p); time_unit = bytestream2_get_le64(&p);
spu = bytestream2_get_le64(&p); spu = bytestream2_get_le64(&p);
if (!time_unit || !spu) {
av_log(s, AV_LOG_ERROR, "Invalid timing values.\n");
return AVERROR_INVALIDDATA;
}
bytestream2_skip(&p, 4); /* default_len */ bytestream2_skip(&p, 4); /* default_len */
bytestream2_skip(&p, 8); /* buffersize + bits_per_sample */ bytestream2_skip(&p, 8); /* buffersize + bits_per_sample */