This is a note to let you know that I've just added the patch titled
ovl: fix open in stacked overlay
to the 4.2-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-open-in-stacked-overlay.patch
and it can be found in the queue-4.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1c8a47df36d72ace8cf78eb6c228aa0f8027d3c2 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <miklos@xxxxxxxxxx>
Date: Mon, 12 Oct 2015 15:56:20 +0200
Subject: ovl: fix open in stacked overlay
From: Miklos Szeredi <miklos@xxxxxxxxxx>
commit 1c8a47df36d72ace8cf78eb6c228aa0f8027d3c2 upstream.
If two overlayfs filesystems are stacked on top of each other, then we need
recursion in ovl_d_select_inode().
I guess d_backing_inode() is supposed to do that. But currently it doesn't
and that functionality is open coded in vfs_open(). This is now copied
into ovl_d_select_inode() to fix this regression.
Reported-by: Alban Crequy <alban.crequy@xxxxxxxxx>
Signed-off-by: Miklos Szeredi <miklos@xxxxxxxxxx>
Fixes: 4bacc9c9234c ("overlayfs: Make f_path always point to the overlay...")
Cc: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/overlayfs/inode.c | 3 +++
1 file changed, 3 insertions(+)
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -363,6 +363,9 @@ struct inode *ovl_d_select_inode(struct
ovl_path_upper(dentry, &realpath);
}
+ if (realpath.dentry->d_flags & DCACHE_OP_SELECT_INODE)
+ return realpath.dentry->d_op->d_select_inode(realpath.dentry, file_flags);
+
return d_backing_inode(realpath.dentry);
}
Patches currently in stable-queue which might be from miklos@xxxxxxxxxx are
queue-4.2/ovl-free-stack-of-paths-in-ovl_fill_super.patch
queue-4.2/ovl-fix-dentry-reference-leak.patch
queue-4.2/ovl-use-o_largefile-in-ovl_copy_up.patch
queue-4.2/ovl-free-lower_mnt-array-in-ovl_put_super.patch
queue-4.2/ovl-fix-open-in-stacked-overlay.patch
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