Patch "ovl: disallow overlayfs as upperdir" has been added to the 4.7-stable tree

Patch "ovl: disallow overlayfs as upperdir" has been added to the 4.7-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ovl: disallow overlayfs as upperdir

to the 4.7-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ovl-disallow-overlayfs-as-upperdir.patch
and it can be found in the queue-4.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 76bc8e2843b66f8205026365966b49ec6da39ae7 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@redhat.com>
Date: Fri, 29 Jul 2016 12:05:24 +0200
Subject: ovl: disallow overlayfs as upperdir

From: Miklos Szeredi <mszeredi@redhat.com>

commit 76bc8e2843b66f8205026365966b49ec6da39ae7 upstream.

This does not work and does not make sense.  So instead of fixing it
(probably not hard) just disallow.

Reported-by: Andrei Vagin <avagin@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/overlayfs/super.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -404,7 +404,8 @@ static struct ovl_entry *ovl_alloc_entry
 static bool ovl_dentry_remote(struct dentry *dentry)
 {
 	return dentry->d_flags &
-		(DCACHE_OP_REVALIDATE | DCACHE_OP_WEAK_REVALIDATE);
+		(DCACHE_OP_REVALIDATE | DCACHE_OP_WEAK_REVALIDATE |
+		 DCACHE_OP_REAL);
 }
 
 static bool ovl_dentry_weird(struct dentry *dentry)


Patches currently in stable-queue which might be from mszeredi@redhat.com are

queue-4.7/ovl-disallow-overlayfs-as-upperdir.patch