4.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Al Viro <[email protected]>

commit 9391dd00d13c853ab4f2a85435288ae2202e0e43 upstream.

when opening a directory we want the overlayfs inode, not one from
the topmost layer.

Reported-By: Andrey Jr. Melnikov <[email protected]>
Tested-By: Andrey Jr. Melnikov <[email protected]>
Signed-off-by: Al Viro <[email protected]>
Cc: "Kamata, Munehisa" <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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

--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -342,6 +342,9 @@ struct inode *ovl_d_select_inode(struct
        struct path realpath;
        enum ovl_path_type type;
 
+       if (d_is_dir(dentry))
+               return d_backing_inode(dentry);
+
        type = ovl_path_real(dentry, &realpath);
        if (ovl_open_need_copy_up(file_flags, type, realpath.dentry)) {
                err = ovl_want_write(dentry);


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