From patchwork Wed Aug 1 20:57:12 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Marzinski X-Patchwork-Id: 10552989 X-Patchwork-Delegate: christophe.varoqui@free.fr Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AE877139A for ; Wed, 1 Aug 2018 21:00:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A0E002B955 for ; Wed, 1 Aug 2018 21:00:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9F4CD2B974; Wed, 1 Aug 2018 21:00:32 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 555E82B955 for ; Wed, 1 Aug 2018 21:00:32 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 75E8585550; Wed, 1 Aug 2018 21:00:31 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 3B59422711; Wed, 1 Aug 2018 21:00:31 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id EA2BC4A464; Wed, 1 Aug 2018 21:00:30 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id w71KwClI028211 for ; Wed, 1 Aug 2018 16:58:12 -0400 Received: by smtp.corp.redhat.com (Postfix) id B1C2110E51A4; Wed, 1 Aug 2018 20:58:12 +0000 (UTC) Delivered-To: dm-devel@redhat.com Received: from redhat.com (octiron.msp.redhat.com [10.15.80.209]) by smtp.corp.redhat.com (Postfix) with SMTP id 7F87C10E51A1; Wed, 1 Aug 2018 20:58:11 +0000 (UTC) Received: by redhat.com (sSMTP sendmail emulation); Wed, 01 Aug 2018 15:58:11 -0500 From: "Benjamin Marzinski" To: device-mapper development Date: Wed, 1 Aug 2018 15:57:12 -0500 Message-Id: <1533157038-3924-27-git-send-email-bmarzins@redhat.com> In-Reply-To: <1533157038-3924-1-git-send-email-bmarzins@redhat.com> References: <1533157038-3924-1-git-send-email-bmarzins@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-loop: dm-devel@redhat.com Cc: Martin Wilck Subject: [dm-devel] [PATCH 26/32] libmultipath: fix null dereference int alloc_path_group X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Wed, 01 Aug 2018 21:00:31 +0000 (UTC) X-Virus-Scanned: ClamAV using ClamSMTP If all_pathgroup failed to allocate a vector for pgp->paths, instead of failing after it freed pgp, it would set pgp to NULL and then dereference it. This patch fixes that. Found by coverity. Signed-off-by: Benjamin Marzinski --- libmultipath/structs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libmultipath/structs.c b/libmultipath/structs.c index ae847d6..caa178a 100644 --- a/libmultipath/structs.c +++ b/libmultipath/structs.c @@ -165,7 +165,7 @@ alloc_pathgroup (void) if (!pgp->paths) { FREE(pgp); - pgp = NULL; + return NULL; } dm_pathgroup_to_gen(pgp)->ops = &dm_gen_pathgroup_ops;