From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Weston Andros Adamson , Trond Myklebust , Kamal Mostafa Subject: [PATCH 3.8 076/124] nfs4: fix discover_server_trunking use after free Date: Mon, 10 Feb 2014 11:40:16 -0800 Message-Id: <1392061264-28124-77-git-send-email-kamal@canonical.com> In-Reply-To: <1392061264-28124-1-git-send-email-kamal@canonical.com> References: <1392061264-28124-1-git-send-email-kamal@canonical.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.8.13.18 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Weston Andros Adamson commit abad2fa5ba67725a3f9c376c8cfe76fbe94a3041 upstream. If clp is new (cl_count = 1) and it matches another client in nfs4_discover_server_trunking, the nfs_put_client will free clp before ->cl_preserve_clid is set. Signed-off-by: Weston Andros Adamson Signed-off-by: Trond Myklebust Signed-off-by: Kamal Mostafa --- fs/nfs/nfs4client.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c index c53189d..08ff307 100644 --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -236,13 +236,11 @@ struct nfs_client *nfs4_init_client(struct nfs_client *clp, error = nfs4_discover_server_trunking(clp, &old); if (error < 0) goto error; - nfs_put_client(clp); - if (clp != old) { - clp->cl_preserve_clid = true; - clp = old; - } - return clp; + if (clp != old) + clp->cl_preserve_clid = true; + nfs_put_client(clp); + return old; error: nfs_mark_client_ready(clp, error); -- 1.8.3.2