From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965388Ab2C3VPr (ORCPT ); Fri, 30 Mar 2012 17:15:47 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:40131 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965345Ab2C3VPh (ORCPT ); Fri, 30 Mar 2012 17:15:37 -0400 Message-Id: <20120330194901.714510309@linuxfoundation.org> User-Agent: quilt/0.60-19.1 Date: Fri, 30 Mar 2012 12:50:43 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Weston Andros Adamson , Trond Myklebust Subject: [ 130/149] NFSv4: Fix two infinite loops in the mount code In-Reply-To: <20120330195823.GA31857@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Trond Myklebust commit 05e9cfb408b24debb3a85fd98edbfd09dd148881 upstream. We can currently loop forever in nfs4_lookup_root() and in nfs41_proc_secinfo_no_name(), if the first iteration returns a NFS4ERR_DELAY or something else that causes exception.retry to get set. Reported-by: Weston Andros Adamson Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman --- fs/nfs/nfs4proc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -2242,11 +2242,12 @@ static int nfs4_lookup_root(struct nfs_s switch (err) { case 0: case -NFS4ERR_WRONGSEC: - break; + goto out; default: err = nfs4_handle_exception(server, err, &exception); } } while (exception.retry); +out: return err; } @@ -6099,11 +6100,12 @@ nfs41_proc_secinfo_no_name(struct nfs_se case 0: case -NFS4ERR_WRONGSEC: case -NFS4ERR_NOTSUPP: - break; + goto out; default: err = nfs4_handle_exception(server, err, &exception); } } while (exception.retry); +out: return err; }