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Commit 5d93db4b authored by David Howells's avatar David Howells Committed by Sasha Levin
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VFS: AF_UNIX sockets should call mknod on the top layer only 



[ Upstream commit ee8ac4d61c2cf43bdd427e70db97ac330e61570d ]

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: default avatarDavid Howells <dhowells@redhat.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
parent b65b0f67

net/unix/af_unix.c

+1 −1
Original line number Diff line number Diff line
@@ -959,7 +959,7 @@ 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);