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wtvdec: fix name_size check to consider integer overflows. 

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-04-14 18:32:36 +02:00
parent 83c7803f55
commit c42efad3c3
1 changed files with 1 additions and 1 deletions
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2
libavformat/wtvdec.c
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@ -258,7 +258,7 @@ static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int b
dir_length = AV_RL16(buf + 16);
file_length = AV_RL64(buf + 24);
name_size = 2 * AV_RL32(buf + 32);
if (buf + 48 + name_size > buf_end) {
if (buf + 48 + (int64_t)name_size > buf_end || name_size<0) {
av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
break;
}