Patch "ovl: fix workdir creation" has been added to the 4.4-stable tree

Patch "ovl: fix workdir creation" has been added to the 4.4-stable tree

[gregkh]

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

    ovl: fix workdir creation

to the 4.4-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-fix-workdir-creation.patch
and it can be found in the queue-4.4 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 e1ff3dd1ae52cef5b5373c8cc4ad949c2c25a71c Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@redhat.com>
Date: Mon, 5 Sep 2016 13:55:20 +0200
Subject: ovl: fix workdir creation

From: Miklos Szeredi <mszeredi@redhat.com>

commit e1ff3dd1ae52cef5b5373c8cc4ad949c2c25a71c upstream.

Workdir creation fails in latest kernel.

Fix by allowing EOPNOTSUPP as a valid return value from
vfs_removexattr(XATTR_NAME_POSIX_ACL_*).  Upper filesystem may not support
ACL and still be perfectly able to support overlayfs.

Reported-by: Martin Ziegler <ziegler@uni-freiburg.de>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: c11b9fdd6a61 ("ovl: remove posix_acl_default from workdir")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/overlayfs/super.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -784,11 +784,11 @@ retry:
 			goto out_dput;
 
 		err = vfs_removexattr(work, XATTR_NAME_POSIX_ACL_DEFAULT);
-		if (err && err != -ENODATA)
+		if (err && err != -ENODATA && err != -EOPNOTSUPP)
 			goto out_dput;
 
 		err = vfs_removexattr(work, XATTR_NAME_POSIX_ACL_ACCESS);
-		if (err && err != -ENODATA)
+		if (err && err != -ENODATA && err != -EOPNOTSUPP)
 			goto out_dput;
 
 		/* Clear any inherited mode bits */


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

queue-4.4/ovl-listxattr-use-strnlen.patch
queue-4.4/ovl-remove-posix_acl_default-from-workdir.patch
queue-4.4/ovl-don-t-copy-up-opaqueness.patch
queue-4.4/ovl-proper-cleanup-of-workdir.patch
queue-4.4/ovl-fix-workdir-creation.patch