linux-kernel - [PATCH 07/15] VFS: AF_UNIX sockets should call mknod on the top layer only

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Message-ID: <20150325144437.17670.59599.stgit@warthog.procyon.org.uk>
Date:	Wed, 25 Mar 2015 14:44:37 +0000
From:	David Howells <dhowells@...hat.com>
To:	viro@....linux.org.uk
Cc:	dhowells@...hat.com, linux-unionfs@...r.kernel.org,
	linux-kernel@...r.kernel.org, miklos@...redi.hu
Subject: [PATCH 07/15] VFS: AF_UNIX sockets should call mknod on the top
 layer only

AF_UNIX sockets should call mknod on the top layer only and should not attempt
to modify the lower layer in a layered filesystem such as overlayfs.

Signed-off-by: David Howells <dhowells@...hat.com>
---

 net/unix/af_unix.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 526b6edab018..bd3a1cfd4b73 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -844,7 +844,7 @@ static int unix_mknod(const char *sun_path, umode_t mode, struct path *res)
 	 */
 	err = security_path_mknod(&path, dentry, mode, 0);
 	if (!err) {
-		err = vfs_mknod(path.dentry->d_inode, dentry, mode, 0);
+		err = vfs_mknod(d_inode(path.dentry), dentry, mode, 0);
 		if (!err) {
 			res->mnt = mntget(path.mnt);
 			res->dentry = dget(dentry);

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