Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754672Ab1DSUcq (ORCPT ); Tue, 19 Apr 2011 16:32:46 -0400 Received: from kroah.org ([198.145.64.141]:47538 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754237Ab1DSUQt (ORCPT ); Tue, 19 Apr 2011 16:16:49 -0400 X-Mailbox-Line: From gregkh@clark.kroah.org Tue Apr 19 13:10:43 2011 Message-Id: <20110419201043.618871419@clark.kroah.org> User-Agent: quilt/0.48-16.4 Date: Tue, 19 Apr 2011 13:08:13 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Jeff Layton , Steve French Subject: [04/70] cifs: always do is_path_accessible check in cifs_mount In-Reply-To: <20110419201501.GA8865@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1782 Lines: 48 2.6.38-stable review patch. If anyone has any objections, please let us know. ------------------ From: Jeff Layton commit 70945643722ffeac779d2529a348f99567fa5c33 upstream. Currently, we skip doing the is_path_accessible check in cifs_mount if there is no prefixpath. I have a report of at least one server however that allows a TREE_CONNECT to a share that has a DFS referral at its root. The reporter in this case was using a UNC that had no prefixpath, so the is_path_accessible check was not triggered and the box later hit a BUG() because we were chasing a DFS referral on the root dentry for the mount. This patch fixes this by removing the check for a zero-length prefixpath. That should make the is_path_accessible check be done in this situation and should allow the client to chase the DFS referral at mount time instead. Reported-and-Tested-by: Yogesh Sharma Signed-off-by: Jeff Layton Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman --- fs/cifs/connect.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -2826,7 +2826,7 @@ try_mount_again: remote_path_check: /* check if a whole path (including prepath) is not remote */ - if (!rc && cifs_sb->prepathlen && tcon) { + if (!rc && tcon) { /* build_path_to_root works only when we have a valid tcon */ full_path = cifs_build_path_to_root(cifs_sb, tcon); if (full_path == NULL) { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/