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avformat/oggparseogm: Check lb against psize 

No testcase, this was found during code review

Found-by: Matt Wolenetz <wolenetz@google.com>
Reviewed-by: Matt Wolenetz <wolenetz@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-03-09 01:05:20 +01:00
parent 010b7b30b7
commit 3e7c847aaf
1 changed files with 3 additions and 0 deletions
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3
libavformat/oggparseogm.c
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@ -176,6 +176,9 @@ ogm_packet(AVFormatContext *s, int idx)
os->pflags |= AV_PKT_FLAG_KEY;
lb = ((*p & 2) << 1) | ((*p >> 6) & 3);
if (os->psize < lb + 1)
return AVERROR_INVALIDDATA;
os->pstart += lb + 1;
os->psize -= lb + 1;