From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: linux-nfs-owner@vger.kernel.org Received: from fieldses.org ([174.143.236.118]:42014 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752083Ab1KHCMy (ORCPT ); Mon, 7 Nov 2011 21:12:54 -0500 Received: from bfields by fieldses.org with local (Exim 4.72) (envelope-from ) id 1RNbBF-0005lo-Ag for linux-nfs@vger.kernel.org; Mon, 07 Nov 2011 21:12:53 -0500 Date: Mon, 7 Nov 2011 21:12:53 -0500 To: linux-nfs@vger.kernel.org Subject: [PATCH] nfsd4: fix lockowner matching Message-ID: <20111108021253.GA22060@fieldses.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii From: "J. Bruce Fields" Sender: linux-nfs-owner@vger.kernel.org List-ID: From: "J. Bruce Fields" Lockowners are looked up by file as well as by owner, but we were forgetting to do a comparison on the file. This could cause an incorrect result from lockt. (Note looking up the inode from the lockowner is pretty awkward here. The data structures need fixing.) Cc: stable@kernel.org Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4state.c | 17 +++++++++++++++-- 1 files changed, 15 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 47e94e3..5abced7 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -3809,16 +3809,29 @@ nevermind: deny->ld_type = NFS4_WRITE_LT; } +static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) +{ + struct nfs4_ol_stateid *lst; + + if (!same_owner_str(&lo->lo_owner, owner, clid)) + return false; + lst = list_first_entry(&lo->lo_owner.so_stateids, + struct nfs4_ol_stateid, st_perstateowner); + return lst->st_file->fi_inode == inode; +} + static struct nfs4_lockowner * find_lockowner_str(struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) { unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); + struct nfs4_lockowner *lo; struct nfs4_stateowner *op; list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { - if (same_owner_str(op, owner, clid)) - return lockowner(op); + lo = lockowner(op); + if (same_lockowner_ino(lo, inode, clid, owner)) + return lo; } return NULL; } -- 1.7.5.4