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authorJeff Dike <jdike@addtoit.com>2010-04-07 09:59:10 -0400
committerMichael S. Tsirkin <mst@redhat.com>2010-04-07 17:04:45 +0300
commit179b284e2fc0c638035843968f7d7ab8ab701525 (patch)
tree6876a4fa365d13be8fb137856bf183e4085f77d7
parent535297a6ae4c3b7a0562e71fac15c213eeec68e7 (diff)
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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>
-rw-r--r--drivers/vhost/vhost.c4
1 files changed, 4 insertions, 0 deletions
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 @@ static int vq_memory_access_ok(void __user *log_base, struct vhost_memory *mem,
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;