From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5385FC4360C for ; Sun, 6 Oct 2019 17:58:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2114620673 for ; Sun, 6 Oct 2019 17:58:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570384714; bh=lzf4NezQwvnIwgsemkILbMCirg6UhvXpkxXQMME+7bw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xRCuej+Iyjx+Q9ADOsy4t/SoXIYEmduvCxVphZ/mrUvDFnyd+q6lAOE4y8RBsMIbT 7G9uCo6IfE3sc0BcjnlcZGahzSbrxTGCWTnfGoEXbs3UxUxi4WORQS0Gw0sW/yMBbU u3PQYiYqQYZgNjrDPKdci6IsN/3xFbfvzCuo7u9A= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727673AbfJFR63 (ORCPT ); Sun, 6 Oct 2019 13:58:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:58482 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729091AbfJFRcF (ORCPT ); Sun, 6 Oct 2019 13:32:05 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0E0E4214D9; Sun, 6 Oct 2019 17:32:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570383124; bh=lzf4NezQwvnIwgsemkILbMCirg6UhvXpkxXQMME+7bw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zx1MgU7WZsUGNr04bSLfnIDa4IIJ3Bft/25mLaoW7Dn4dwLlJckA0HPlMYpLjXU3g s8p0R5qyMxV/cj/CjajZoo5zppGw82cfRjjkWeQKfdCFUtne/sMVCYdDr162Vm91Q5 PNGQiR06VuabL6Ph/tGCxxfXt8dFYuxu7W7UpKSw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dotan Barak , Sudhakar Dindukurti , Santosh Shilimkar , "David S. Miller" Subject: [PATCH 4.19 096/106] net/rds: Fix error handling in rds_ib_add_one() Date: Sun, 6 Oct 2019 19:21:42 +0200 Message-Id: <20191006171201.744213878@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191006171124.641144086@linuxfoundation.org> References: <20191006171124.641144086@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dotan Barak [ Upstream commit d64bf89a75b65f83f06be9fb8f978e60d53752db ] rds_ibdev:ipaddr_list and rds_ibdev:conn_list are initialized after allocation some resources such as protection domain. If allocation of such resources fail, then these uninitialized variables are accessed in rds_ib_dev_free() in failure path. This can potentially crash the system. The code has been updated to initialize these variables very early in the function. Signed-off-by: Dotan Barak Signed-off-by: Sudhakar Dindukurti Acked-by: Santosh Shilimkar Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/rds/ib.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/net/rds/ib.c +++ b/net/rds/ib.c @@ -143,6 +143,9 @@ static void rds_ib_add_one(struct ib_dev refcount_set(&rds_ibdev->refcount, 1); INIT_WORK(&rds_ibdev->free_work, rds_ib_dev_free); + INIT_LIST_HEAD(&rds_ibdev->ipaddr_list); + INIT_LIST_HEAD(&rds_ibdev->conn_list); + rds_ibdev->max_wrs = device->attrs.max_qp_wr; rds_ibdev->max_sge = min(device->attrs.max_send_sge, RDS_IB_MAX_SGE); @@ -203,9 +206,6 @@ static void rds_ib_add_one(struct ib_dev device->name, rds_ibdev->use_fastreg ? "FRMR" : "FMR"); - INIT_LIST_HEAD(&rds_ibdev->ipaddr_list); - INIT_LIST_HEAD(&rds_ibdev->conn_list); - down_write(&rds_ib_devices_lock); list_add_tail_rcu(&rds_ibdev->list, &rds_ib_devices); up_write(&rds_ib_devices_lock);