security: inode: fix a missing check for securityfs_create_file

securityfs_create_file  may fail. The fix checks its status and
returns the error code upstream if it fails.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: James Morris <james.morris@microsoft.com>

diff --git a/security/inode.c b/security/inode.c
index b7772a9b315eea144fd24afef873b7e54519d7f9..667f8b15027d890a60840ab34768f049638d11b2 100644 (file)
--- a/security/inode.c
+++ b/security/inode.c
@@ -339,6 +339,11 @@ static int __init securityfs_init(void)
 #ifdef CONFIG_SECURITY
        lsm_dentry = securityfs_create_file("lsm", 0444, NULL, NULL,
                                                &lsm_ops);
+       if (IS_ERR(lsm_dentry)) {
+               unregister_filesystem(&fs_type);
+               sysfs_remove_mount_point(kernel_kobj, "security");
+               return PTR_ERR(lsm_dentry);
+       }
 #endif
        return 0;
 }