From patchwork Tue Nov 25 10:35:56 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luis Henriques X-Patchwork-Id: 5378051 Return-Path: X-Original-To: patchwork-ceph-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id E52369F39D for ; Tue, 25 Nov 2014 12:08:39 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2599B200E1 for ; Tue, 25 Nov 2014 12:08:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3997620142 for ; Tue, 25 Nov 2014 12:08:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753363AbaKYMHq (ORCPT ); Tue, 25 Nov 2014 07:07:46 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:57980 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752061AbaKYKkP (ORCPT ); Tue, 25 Nov 2014 05:40:15 -0500 Received: from bl15-150-46.dsl.telepac.pt ([188.80.150.46] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1XtDXZ-0001h1-6O; Tue, 25 Nov 2014 10:40:13 +0000 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Yehuda Sadeh , Sage Weil , ceph-devel@vger.kernel.org, Jan Kara , Ilya Dryomov , Luis Henriques Subject: [PATCH 3.16.y-ckt 006/254] rbd: Fix error recovery in rbd_obj_read_sync() Date: Tue, 25 Nov 2014 10:35:56 +0000 Message-Id: <1416912004-5928-7-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1416912004-5928-1-git-send-email-luis.henriques@canonical.com> References: <1416912004-5928-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.16 Sender: ceph-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 3.16.7-ckt2 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Jan Kara commit a8d4205623ae965e36c68629db306ca0695a2771 upstream. When we fail to allocate page vector in rbd_obj_read_sync() we just basically ignore the problem and continue which will result in an oops later. Fix the problem by returning proper error. CC: Yehuda Sadeh CC: Sage Weil CC: ceph-devel@vger.kernel.org Coverity-id: 1226882 Signed-off-by: Jan Kara Signed-off-by: Ilya Dryomov Signed-off-by: Luis Henriques --- drivers/block/rbd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 9dc02c429771..a15500662f4c 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -3389,7 +3389,7 @@ static int rbd_obj_read_sync(struct rbd_device *rbd_dev, page_count = (u32) calc_pages_for(offset, length); pages = ceph_alloc_page_vector(page_count, GFP_KERNEL); if (IS_ERR(pages)) - ret = PTR_ERR(pages); + return PTR_ERR(pages); ret = -ENOMEM; obj_request = rbd_obj_request_create(object_name, offset, length,