From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from aserp1040.oracle.com ([141.146.126.69]:34725 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935002AbdKGBEK (ORCPT ); Mon, 6 Nov 2017 20:04:10 -0500 Received: from aserv0022.oracle.com (aserv0022.oracle.com [141.146.126.234]) by aserp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id vA7149UM030697 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 7 Nov 2017 01:04:09 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by aserv0022.oracle.com (8.14.4/8.14.4) with ESMTP id vA714864007359 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 7 Nov 2017 01:04:09 GMT Received: from abhmp0002.oracle.com (abhmp0002.oracle.com [141.146.116.8]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id vA7148S0017845 for ; Tue, 7 Nov 2017 01:04:08 GMT Subject: [PATCH 5/5] xfs: fix btree scrub deref check From: "Darrick J. Wong" Date: Mon, 06 Nov 2017 17:03:52 -0800 Message-ID: <151001663224.26786.16638321559848220870.stgit@magnolia> In-Reply-To: <151001660179.26786.15701876786383794673.stgit@magnolia> References: <151001660179.26786.15701876786383794673.stgit@magnolia> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-xfs-owner@vger.kernel.org List-ID: List-Id: xfs To: darrick.wong@oracle.com Cc: linux-xfs@vger.kernel.org From: Darrick J. Wong The btree scrubber has some custom code to retrieve and check a btree block via xfs_btree_lookup_get_block. This function will either return an error code (verifiers failed) or a *pblock will be untouched (bad pointer). Since we previously set *pblock to NULL, we need to check *pblock, not pblock, to trigger the early bailout. Signed-off-by: Darrick J. Wong --- fs/xfs/scrub/btree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/xfs/scrub/btree.c b/fs/xfs/scrub/btree.c index a814404..df07661 100644 --- a/fs/xfs/scrub/btree.c +++ b/fs/xfs/scrub/btree.c @@ -335,7 +335,7 @@ xfs_scrub_btree_get_block( error = xfs_btree_lookup_get_block(bs->cur, level, pp, pblock); if (!xfs_scrub_btree_process_error(bs->sc, bs->cur, level, &error) || - !pblock) + !*pblock) return error; xfs_btree_get_block(bs->cur, level, pbp);