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check to detect nonsense fragment size

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Originally committed as revision 7653 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-01-22 21:17:54 +00:00
parent 1ae7518dda
commit 13f7e4b966
1 changed files with 4 additions and 0 deletions
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4
libavformat/asf.c
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@ -571,6 +571,10 @@ static int asf_read_frame_header(AVFormatContext *s){
}
if (asf->packet_flags & 0x01) {
DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
if(asf->packet_frag_size > asf->packet_size_left - rsize){
av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
return -1;
}
//printf("Fragsize %d\n", asf->packet_frag_size);
} else {
asf->packet_frag_size = asf->packet_size_left - rsize;