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[209.132.180.67]) by mx.google.com with ESMTP id t10-v6si4963111plh.306.2018.06.14.03.22.06; Thu, 14 Jun 2018 03:22:20 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=NFSEBehZ; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754893AbeFNKVn (ORCPT + 99 others); Thu, 14 Jun 2018 06:21:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:34546 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754739AbeFNKVl (ORCPT ); Thu, 14 Jun 2018 06:21:41 -0400 Received: from localhost (LFbn-1-12247-202.w90-92.abo.wanadoo.fr [90.92.61.202]) (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 D4BCC208D7; Thu, 14 Jun 2018 10:21:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1528971701; bh=BvQmTCPSaDx6OEEkwkv91TV7t4IhxCcDoB0HrhNHKW8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=NFSEBehZAI5WnkT1k6x4ovsYjA8g3YoI2CiggAGZKBCmB05h8kYgMRKraoH8QDdPT ec2HkW2gcctbEOrA8zvfH8f/59m7xcoRdmwEzCk3iQVdKYVA2DMZUgkpZJVpSoBmNx gD5w6ESOpoal5rCLjtdqwIUuw9vlUCCD6ZcOqOiI= Date: Thu, 14 Jun 2018 12:21:19 +0200 From: Greg Kroah-Hartman To: Jan Stancek Cc: Naresh Kamboju , Ben Hutchings , Rafael Tinoco , Linus Torvalds , ltp@lists.linux.it, open list , lkft-triage@lists.linaro.org, patches@kernelci.org, linux- stable , Andrew Morton , Shuah Khan , Guenter Roeck Subject: Re: [LTP] [PATCH 4.4 00/24] 4.4.137-stable review Message-ID: <20180614102119.GA19094@kroah.com> References: <20180612164816.587001852@linuxfoundation.org> <20180613210044.GA15146@kroah.com> <20180614063448.GB6021@kroah.com> <20180614090151.GA24997@kroah.com> <2072095076.26539556.1528969792388.JavaMail.zimbra@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <2072095076.26539556.1528969792388.JavaMail.zimbra@redhat.com> User-Agent: Mutt/1.10.0 (2018-05-17) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 14, 2018 at 05:49:52AM -0400, Jan Stancek wrote: > > ----- Original Message ----- > > On Thu, Jun 14, 2018 at 02:24:25PM +0530, Naresh Kamboju wrote: > > > On 14 June 2018 at 12:04, Greg Kroah-Hartman > > > wrote: > > > > On Wed, Jun 13, 2018 at 10:48:50PM -0300, Rafael Tinoco wrote: > > > >> On 13 June 2018 at 18:08, Rafael David Tinoco > > > >> wrote: > > > >> > On Wed, Jun 13, 2018 at 6:00 PM, Greg Kroah-Hartman > > > >> > wrote: > > > >> >> On Wed, Jun 13, 2018 at 05:47:49PM -0300, Rafael Tinoco wrote: > > > >> >>> Results from Linaro’s test farm. > > > >> >>> Regressions detected. > > > >> >>> > > > >> >>> NOTE: > > > >> >>> > > > >> >>> 1) LTP vma03 test (cve-2011-2496) broken on v4.4-137-rc1 because of: > > > >> >>> > > > >> >>> 6ea1dc96a03a mmap: relax file size limit for regular files > > > >> >>> bd2f9ce5bacb mmap: introduce sane default mmap limits > > > >> >>> > > > >> >>> discussion: > > > >> >>> > > > >> >>> https://github.com/linux-test-project/ltp/issues/341 > > > >> >>> > > > >> >>> mainline commit (v4.13-rc7): > > > >> >>> > > > >> >>> 0cc3b0ec23ce Clarify (and fix) MAX_LFS_FILESIZE macros > > > >> >>> > > > >> >>> should be backported to 4.4.138-rc2 and fixes the issue. > > > >> >> > > > >> >> Really? That commit says it fixes c2a9737f45e2 ("vfs,mm: fix a dead > > > >> >> loop in truncate_inode_pages_range()") which is not in 4.4.y at all. > > > >> >> > > > >> >> Did you test this out? > > > >> > > > > >> > Yes, the LTP contains the tests (last comment is the final test for > > > >> > arm32, right before Jan tests i686). > > > >> > > > > >> > Fixing MAX_LFS_FILESIZE fixes the new limit for mmap() brought by > > > >> > those 2 commits (file_mmap_size_max()). > > > >> > offset tested by the LTP test is 0xfffffffe000. > > > >> > file_mmap_size_max gives: 0xFFFFFFFF000 as max value, but only after > > > >> > the mentioned patch. > > > >> > > > > >> > Original intent for this fix was other though. > > > >> > > > >> To clarify this a bit further. > > > >> > > > >> The LTP CVE test is breaking in the first call to mmap(), even before > > > >> trying to remap and test the security issue. That start happening in > > > >> this round because of those mmap() changes and the offset used in the > > > >> LTP test. Linus changed limit checks and made them to be related to > > > >> MAX_LFS_FILESIZE. Unfortunately, in 4.4 stable, we were missing the > > > >> fix for MAX_LFS_FILESIZE (which before commit 0cc3b0ec23ce was less > > > >> than the REAL 32 bit limit). > > > >> > > > >> Commit 0cc3b0ec23ce was made because an user noticed the FS limit not > > > >> being what it should be. In our case, the 4.4 stable kernel, we are > > > >> facing this 32 bit lower limit (than the real 32 bit real limit), > > > >> because of the LTP CVE test, so we need this fix to have the real 32 > > > >> bit limit set for that macro (mmap limits did not use that macro > > > >> before). > > > >> > > > >> I have tested in arm32 and Jan Stancek, who first responded to LTP > > > >> issue, has tested this in i686 and both worked after that patch was > > > >> included to v4.4-137-rc1 (my last test was even with 4.4.138-rc1). > > > >> > > > >> Hope that helps a bit. > > > > > > > > Ok, thanks, it didn't apply cleanly but I've fixed it up now. > > > > > > On the latest 4.4.138-rc1, > > > LTP "cve-2011-2496" test still fails on arm32 beagleboard x15 and qemu_arm. > > > > > > Summary > > > ------------------------------------------------------------------------ > > > kernel: 4.4.138-rc1 > > > git repo: > > > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git > > > git branch: linux-4.4.y > > > git commit: 7d690c56754ef7be647fbcf7bcdceebd59926b3f > > > git describe: v4.4.137-15-g7d690c56754e > > > Test details: > > > https://qa-reports.linaro.org/lkft/linux-stable-rc-4.4-oe/build/v4.4.137-15-g7d690c56754e > > > > Ok, but what does this mean? Is there a commit somewhere that I need to > > pick up for 4.4.y that is already in newer kernels? > > Hi Greg, > > I think the expectations was that: > 0cc3b0ec23ce Clarify (and fix) MAX_LFS_FILESIZE macros > has been included to linux-4.4.y HEAD, so they re-ran the tests. > > Report from Naresh above looks like original report: LTP vma03 is cve-2011-2496 test. And the test fails now? Still confused. greg k-h