Changeset 44271 in vbox for trunk/src/VBox/Devices/PC

Timestamp:

Jan 10, 2013 5:21:07 PM (12 years ago)

Author:

vboxsync

Message:

BIOS: Sanity check El Torito boot sector count.

File:

• trunk/src/VBox/Devices/PC/BIOS/eltorito.c (modified) (2 diffs)

trunk/src/VBox/Devices/PC/BIOS/eltorito.c

@@ -359 +359 @@
     cdemu->sector_count = nbsectors;
 
+    /* Sanity check the sector count. In incorrectly mastered CDs, it might
+     * be zero. If it's more than 512K, reject it as well.
+     */
+    if (nbsectors == 0 || nbsectors > 1024)
+        return 12;
+
     lba = *((uint32_t *)&buffer[0x28]);
     cdemu->ilba = lba;
@@ -380 +386 @@
 
     if (error != 0)
-        return 12;
+        return 13;
 
     BX_DEBUG_ELTORITO("Emulate drive %02x, type %02x, LBA %lu\n",