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Fix cmd_pos bounds check to avoid the overflow case. 

Originally committed as revision 19640 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2009-08-15 00:02:42 +00:00
parent 84c1b149b2
commit ffbe087b58
1 changed files with 1 additions and 1 deletions
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2
libavcodec/dvdsubdec.c
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@ -191,7 +191,7 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
cmd_pos = READ_OFFSET(buf + cmd_pos);
while ((cmd_pos + 2 + offset_size) < buf_size) {
while (cmd_pos > 0 && cmd_pos < buf_size - 2 - offset_size) {
date = AV_RB16(buf + cmd_pos);
next_cmd_pos = READ_OFFSET(buf + cmd_pos + 2);
dprintf(NULL, "cmd_pos=0x%04x next=0x%04x date=%d\n",