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avformat/mxfdec: Fix Sign error in mxf_read_primer_pack()

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Fixes: 20170829B.mxf

Co-Author: 张洪亮(望初)" <wangchu.zhl@alibaba-inc.com>
Found-by: Xiaohei and Wangchu from Alibaba Security Team
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
孙浩(晓黑) 2017-08-29 23:59:21 +02:00 committed by Michael Niedermayer
parent 900f39692c
commit 9d00fb9d70
1 changed files with 1 additions and 1 deletions
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2
libavformat/mxfdec.c
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@ -500,7 +500,7 @@ static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, U
avpriv_request_sample(pb, "Primer pack item length %d", item_len);
return AVERROR_PATCHWELCOME;
}
if (item_num > 65536) {
if (item_num > 65536 || item_num < 0) {
av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
return AVERROR_INVALIDDATA;
}