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matroska: fix a corner case in ebml-lace parsing

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Make sure we notice when the lace_size[n] is a negative value.

CC: libav-stable@libav.org
This commit is contained in:
Luca Barbato 2013-03-28 11:52:52 +01:00
parent fc43c19a56
commit 8a96df7b70
1 changed files with 1 additions and 1 deletions
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libavformat/matroskadec.c
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@ -1820,7 +1820,7 @@ static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
case 0x3: /* EBML lacing */ {
uint64_t num;
uint32_t total;
uint64_t total;
n = matroska_ebmlnum_uint(matroska, data, size, &num);
if (n < 0) {
av_log(matroska->ctx, AV_LOG_INFO,