Gitweb: http://git.kernel.org/linus/179b284e2fc0c638035843968f7d7ab8ab701525
Commit: 179b284e2fc0c638035843968f7d7ab8ab701525
Parent: 535297a6ae4c3b7a0562e71fac15c213eeec68e7
Author: Jeff Dike <jdike@addtoit.com>
AuthorDate: Wed Apr 7 09:59:10 2010 -0400
Committer: Michael S. Tsirkin <mst@redhat.com>
CommitDate: Wed Apr 7 17:04:45 2010 +0300
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 | 4 ++++
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;
--
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