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孙浩(晓黑)michaelni
孙浩(晓黑)
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avformat/mxfdec: Fix Sign error in mxf_read_primer_pack()
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>
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Diff for: 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
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avpriv_request_sample(pb, "Primer pack item length %d", item_len);
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return AVERROR_PATCHWELCOME;
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}
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if (item_num > 65536) {
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if (item_num > 65536 || item_num < 0) {
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av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
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return AVERROR_INVALIDDATA;
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}

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