commit 179b284e2fc0c638035843968f7d7ab8ab701525
author Jeff Dike <jdike@addtoit.com> Wed Apr 07 09:59:10 2010 -0400
committer Michael S. Tsirkin <mst@redhat.com> Wed Apr 07 17:04:45 2010 +0300
tree 6876a4fa365d13be8fb137856bf183e4085f77d7
parent 535297a6ae4c3b7a0562e71fac15c213eeec68e7

vhost-net: fix vq_memory_access_ok error checking

vq_memory_access_ok needs to check whether mem == NULL

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

drivers/vhost/vhost.c

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 7bd7a1e..b8e1127 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -235,6 +235,10 @@
 			       int log_all)
 {
 	int i;
+
+        if (!mem)
+                return 0;
+
 	for (i = 0; i < mem->nregions; ++i) {
 		struct vhost_memory_region *m = mem->regions + i;
 		unsigned long a = m->userspace_addr;