4.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Al Viro <v...@zeniv.linux.org.uk>
commit 9391dd00d13c853ab4f2a85435288ae2202e0e43 upstream.
when opening a directory we want the overlayfs inode, not one from
the topmost layer.
Reported-By: Andrey Jr. Melnikov <temnota...@gmail.com>
Tested-By: Andrey Jr. Melnikov <temnota...@gmail.com>
Signed-off-by: Al Viro <v...@zeniv.linux.org.uk>
Cc: "Kamata, Munehisa" <kama...@amazon.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
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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