From 718c43038f287e843c2f63d946977de90014cb11 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 20 Dec 2018 03:16:27 -0500
Subject: mount_fs: suppress MAC on MS_SUBMOUNT as well as MS_KERNMOUNT

Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/super.c b/fs/super.c
index a5511c4ba69b..48e25eba8465 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1277,7 +1277,7 @@ mount_fs(struct file_system_type *type, int flags, const char *name, void *data)
 	if (error)
 		goto out_sb;
 
-	if (!(flags & MS_KERNMOUNT)) {
+	if (!(flags & (MS_KERNMOUNT|MS_SUBMOUNT))) {
 		error = security_sb_kern_mount(sb);
 		if (error)
 			goto out_sb;
-- 
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