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asfdec: fix possible overread on broken files.

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This commit is contained in:
Uoti Urpala 2011-05-12 10:20:27 -04:00 committed by Reinhard Tartler
parent 69fa23961e
commit 29fa570d0c
1 changed files with 4 additions and 1 deletions
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5
libavformat/asfdec.c
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@ -852,7 +852,10 @@ static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){
}
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){
if (rsize > asf->packet_size_left) {
av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
return -1;
} else if(asf->packet_frag_size > asf->packet_size_left - rsize){
if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n", asf->packet_size_left, rsize);
return -1;