1 files changed, 1 insertions, 1 deletions

diff --git a/fs/compat.c b/fs/compat.c
index 06dad665b88f..7aef5412f49c 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -871,7 +871,7 @@ asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
 
         retval = -EINVAL;
 
-        if (type_page) {
+        if (type_page && data_page) {
                 if (!strcmp((char *)type_page, SMBFS_NAME)) {
                         do_smb_super_data_conv((void *)data_page);
                 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {