From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Olga Kornievskaia , Trond Myklebust Subject: [PATCH 4.2 089/134] Revert "NFSv4: Remove incorrect check in can_open_delegated()" Date: Sat, 26 Sep 2015 13:55:41 -0700 Message-Id: <20150926205317.196997995@linuxfoundation.org> In-Reply-To: <20150926205311.819185658@linuxfoundation.org> References: <20150926205311.819185658@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org List-ID: 4.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Trond Myklebust commit 36319608e28701c07cad80ae3be8b0fdfb1ab40f upstream. This reverts commit 4e379d36c050b0117b5d10048be63a44f5036115. This commit opens up a race between the recovery code and the open code. Reported-by: Olga Kornievskaia Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman --- fs/nfs/nfs4proc.c | 2 ++ 1 file changed, 2 insertions(+) --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -1156,6 +1156,8 @@ static int can_open_delegated(struct nfs return 0; if ((delegation->type & fmode) != fmode) return 0; + if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) + return 0; if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) return 0; nfs_mark_delegation_referenced(delegation);