From: van <vanj.hb@gmail.com>
Date: Sun, 12 Apr 2009 06:59:40 +0000 (+0000)
Subject: Don't crash during scan when a DVD contains an invalid PTT or PGC index. (Bug & fix... 
X-Git-Tag: 0.9.4~643
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7c54b2bdfdcfa132eed627f8d1a4d02bd888c3e7;p=handbrake

Don't crash during scan when a DVD contains an invalid PTT or PGC index. (Bug & fix from user macrule in forum post http://forum.handbrake.fr/viewtopic.php?f=4&t=10291&sid=8b5a573526397f7c26c44e2a50c6dc63#p54152)


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@2319 b64f7644-9d1e-0410-96f1-a4d463321fa5
---

diff --git a/libhb/dvd.c b/libhb/dvd.c
index 358cb552b..479157e8a 100644
--- a/libhb/dvd.c
+++ b/libhb/dvd.c
@@ -203,9 +203,19 @@ hb_title_t * hb_dvd_title_scan( hb_dvd_t * d, int t )
 
     /* Position of the title in the VTS */
     title->ttn = d->vmg->tt_srpt->title[t-1].vts_ttn;
+    if ( title->ttn < 1 || title->ttn > vts->vts_ptt_srpt->nr_of_srpts )
+    {
+        hb_error( "invalid VTS PTT offset %d for title %d, skipping", title->ttn, t );
+        goto fail;
+    }
 
     /* Get pgc */
     pgc_id = vts->vts_ptt_srpt->title[title->ttn-1].ptt[0].pgcn;
+    if ( pgc_id < 1 || pgc_id > vts->vts_pgcit->nr_of_pgci_srp )
+    {
+        hb_error( "invalid PGC ID %d for title %d, skipping", pgc_id, t );
+        goto fail;
+    }
     pgn    = vts->vts_ptt_srpt->title[title->ttn-1].ptt[0].pgn;
     d->pgc = vts->vts_pgcit->pgci_srp[pgc_id-1].pgc;