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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id B326FC32772 for ; Tue, 23 Aug 2022 09:25:56 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E32CA8D0002; Tue, 23 Aug 2022 05:25:55 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id DBB8C8D0001; Tue, 23 Aug 2022 05:25:55 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C5C738D0002; Tue, 23 Aug 2022 05:25:55 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id AFE2F8D0001 for ; Tue, 23 Aug 2022 05:25:55 -0400 (EDT) Received: from smtpin05.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 7D9211408E9 for ; Tue, 23 Aug 2022 09:25:55 +0000 (UTC) X-FDA: 79830325470.05.4651A06 Received: from mx1.emlix.com (mx1.emlix.com [136.243.223.33]) by imf26.hostedemail.com (Postfix) with ESMTP id C9E3A140044 for ; Tue, 23 Aug 2022 09:25:54 +0000 (UTC) Received: from mailer.emlix.com (p5098be52.dip0.t-ipconnect.de [80.152.190.82]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.emlix.com (Postfix) with ESMTPS id BCE445FC08; Tue, 23 Aug 2022 11:25:52 +0200 (CEST) From: Rolf Eike Beer To: kbuild@lists.01.org, Dan Carpenter , Andrew Morton Cc: lkp@intel.com, kbuild-all@lists.01.org, linux-mm@kvack.org Subject: Re: [PATCH 1/6] mm: pagewalk: make error checks more obvious Date: Tue, 23 Aug 2022 11:25:48 +0200 Message-ID: <2533070.Lt9SDvczpP@devpool047> Organization: emlix GmbH In-Reply-To: <202208231649.7QKavhA3-lkp@intel.com> References: <202208231649.7QKavhA3-lkp@intel.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart4217897.ejJDZkT8p0"; micalg="pgp-sha256"; protocol="application/pgp-signature" ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1661246755; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=lP0TI+sffUTOBU2sEZSgHPldLb2dw5RHHEk9efh0EKg=; b=XZcQmlnrhLVg5SaSAUx0qdr8QPfzUPMGGspjwqUhuDp4Uw9CXdm/O7d4nsMZKIqMVNqLU8 dhs7w3B4UCTPY0p2RiYE39EVAbQhV0uQ/ZKqlkYCKpRcnttq55aG93/rfi7SxdlVw+9r/d ZzYsEyHG0Z0v6DvMF4CP2oRnFU2EgFI= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=none; spf=pass (imf26.hostedemail.com: domain of eb@emlix.com designates 136.243.223.33 as permitted sender) smtp.mailfrom=eb@emlix.com; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1661246755; a=rsa-sha256; cv=none; b=meE9xT9mDwktQhRdZnhb1TJEGK+WMUakMe5I/7fkmWPwNvlQIxZUll7uTz9YQlyMb7XmoP FJSBcCf76v1UkbqhPTIyZPBrGw07L7IULiicLWUazN5Et5hiHhM+V7jexJUebbPWbqBQCO Iu348/Fq1P2yyhv8bukI9Xt9EaKsWhM= X-Rspam-User: Authentication-Results: imf26.hostedemail.com; dkim=none; spf=pass (imf26.hostedemail.com: domain of eb@emlix.com designates 136.243.223.33 as permitted sender) smtp.mailfrom=eb@emlix.com; dmarc=none X-Stat-Signature: n15xhfmidp1ogw9x5tcrr3s3mp4m6fd4 X-Rspamd-Queue-Id: C9E3A140044 X-Rspamd-Server: rspam08 X-HE-Tag: 1661246754-384660 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: --nextPart4217897.ejJDZkT8p0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8"; protected-headers="v1" From: Rolf Eike Beer Cc: lkp@intel.com, kbuild-all@lists.01.org, linux-mm@kvack.org Subject: Re: [PATCH 1/6] mm: pagewalk: make error checks more obvious Date: Tue, 23 Aug 2022 11:25:48 +0200 Message-ID: <2533070.Lt9SDvczpP@devpool047> Organization: emlix GmbH In-Reply-To: <202208231649.7QKavhA3-lkp@intel.com> References: <202208231649.7QKavhA3-lkp@intel.com> MIME-Version: 1.0 Am Dienstag, 23. August 2022, 11:16:42 CEST schrieb Dan Carpenter: > Hi Rolf, >=20 > https://git-scm.com/docs/git-format-patch#_base_tree_information] >=20 > url: =20 > https://github.com/intel-lab-lkp/linux/commits/Rolf-Eike-Beer/Minor-impro= ve > ments-for-pagewalk-code/20220822-214107 base: =20 > https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything > config: x86_64-randconfig-m001 > (https://download.01.org/0day-ci/archive/20220823/202208231649.7QKavhA3-l= kp > @intel.com/config) compiler: gcc-11 (Debian 11.3.0-5) 11.3.0 >=20 > If you fix the issue, kindly add following tag where applicable > Reported-by: kernel test robot > Reported-by: Dan Carpenter >=20 > smatch warnings: > mm/pagewalk.c:248 walk_p4d_range() error: uninitialized symbol 'err'. > mm/pagewalk.c:287 walk_pgd_range() error: uninitialized symbol 'err'. > mm/pagewalk.c:324 walk_hugetlb_range() error: uninitialized symbol 'err'. >=20 > vim +/err +248 mm/pagewalk.c [...] > Same. Although this seems more like a real bug. They all are. I wonder how they got lost and why this never showed up durin= g=20 my tests, but still. Andrew, do you want me to resend the series with the fixes squashed in or a= dd a=20 v7? Eike =2D-=20 Rolf Eike Beer, emlix GmbH, http://www.emlix.com =46on +49 551 30664-0, Fax +49 551 30664-11 Gothaer Platz 3, 37083 G=C3=B6ttingen, Germany Sitz der Gesellschaft: G=C3=B6ttingen, Amtsgericht G=C3=B6ttingen HR B 3160 Gesch=C3=A4ftsf=C3=BChrung: Heike Jordan, Dr. Uwe Kracke =E2=80=93 Ust-IdNr= =2E: DE 205 198 055 emlix - smart embedded open source --nextPart4217897.ejJDZkT8p0 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part. 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