From: Kyle Hale <kh@u.northwestern.edu>
Date: Thu, 23 Aug 2012 08:59:11 +0000 (-0500)
Subject: check for out-of-bounds index when freeing a VM
X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=commitdiff_plain;h=fb863b147912e887585346534ada9070af48412f;p=palacios.git

check for out-of-bounds index when freeing a VM
---

diff --git a/linux_module/main.c b/linux_module/main.c
index fdab7b3..17229c5 100644
--- a/linux_module/main.c
+++ b/linux_module/main.c
@@ -141,7 +141,14 @@ out_err:
 	}
 	case V3_FREE_GUEST: {
 	    unsigned long vm_idx = arg;
-	    struct v3_guest * guest = guest_map[vm_idx];
+            struct v3_guest * guest;
+
+            if (vm_idx > MAX_VMS) {
+                ERROR("Invalid VM index: %ld\n", vm_idx);
+                return -1;
+            }
+
+	    guest = guest_map[vm_idx];
 
 	    if (!guest) {
 		ERROR("No VM at index %ld\n",vm_idx);