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 A696AECAAD5 for ; Mon, 5 Sep 2022 19:16:04 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E42DB801FD; Mon, 5 Sep 2022 15:16:03 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id DF1B5801E6; Mon, 5 Sep 2022 15:16:03 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CBA00801FD; Mon, 5 Sep 2022 15:16:03 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id BC22F801E6 for ; Mon, 5 Sep 2022 15:16:03 -0400 (EDT) Received: from smtpin20.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 96FC4805C9 for ; Mon, 5 Sep 2022 19:16:03 +0000 (UTC) X-FDA: 79878987006.20.308E16B Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf28.hostedemail.com (Postfix) with ESMTP id 2A2CDC0085 for ; Mon, 5 Sep 2022 19:16:03 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 455796146B; Mon, 5 Sep 2022 19:16:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7168DC433C1; Mon, 5 Sep 2022 19:15:56 +0000 (UTC) Date: Mon, 5 Sep 2022 15:16:33 -0400 From: Steven Rostedt To: Nadav Amit Cc: Mel Gorman , Kent Overstreet , Peter Zijlstra , Suren Baghdasaryan , Andrew Morton , Michal Hocko , Vlastimil Babka , Johannes Weiner , roman.gushchin@linux.dev, dave@stgolabs.net, Matthew Wilcox , liam.howlett@oracle.com, void@manifault.com, juri.lelli@redhat.com, ldufour@linux.ibm.com, Peter Xu , David Hildenbrand , Jens Axboe , mcgrof@kernel.org, masahiroy@kernel.org, nathan@kernel.org, changbin.du@intel.com, ytcoode@gmail.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, bristot@redhat.com, vschneid@redhat.com, cl@linux.com, penberg@kernel.org, iamjoonsoo.kim@lge.com, 42.hyeyoo@gmail.com, glider@google.com, Marco Elver , dvyukov@google.com, Shakeel Butt , Muchun Song , Arnd Bergmann , jbaron@akamai.com, David Rientjes , minchan@google.com, kaleshsingh@google.com, kernel-team@android.com, Linux MM , iommu@lists.linux.dev, kasan-dev@googlegroups.com, io-uring@vger.kernel.org, linux-arch , xen-devel@lists.xenproject.org, linux-bcache@vger.kernel.org, linux-modules@vger.kernel.org, LKML Subject: Re: [RFC PATCH 00/30] Code tagging framework and applications Message-ID: <20220905151633.04081816@gandalf.local.home> In-Reply-To: <8EB7F2CE-2C8E-47EA-817F-6DE2D95F0A8B@gmail.com> References: <20220830214919.53220-1-surenb@google.com> <20220831084230.3ti3vitrzhzsu3fs@moria.home.lan> <20220831101948.f3etturccmp5ovkl@suse.de> <8EB7F2CE-2C8E-47EA-817F-6DE2D95F0A8B@gmail.com> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit ARC-Authentication-Results: i=1; imf28.hostedemail.com; dkim=none; spf=pass (imf28.hostedemail.com: domain of "SRS0=a78l=ZI=goodmis.org=rostedt@kernel.org" designates 139.178.84.217 as permitted sender) smtp.mailfrom="SRS0=a78l=ZI=goodmis.org=rostedt@kernel.org"; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1662405363; a=rsa-sha256; cv=none; b=lLdDEsQMtUNbH1657/XwNJxOjM5qh/HRsXPR1iCfT1TtnWbOvJ1fWtnEmAEtK47RIY8twI LX/HKHitPj+AIVpx5A65mmfgK/oIblCnSIRkySqzNvBWYrqEGANcW4tO13G2faGN2POe22 67T3DKm9VlcDpvnGuNQGfjGzjwghc78= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1662405363; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VhLWgZu0MgDN+H4Y6KMCp4dvS/ljYTxwbUIyngNvdVk=; b=nYVsv1p5YhtpsBepm/TBhhqnnSyGwocftWO57SRemER+pp0qoZ4UnuXnx7N/UrwKxmZYOe JmLicya4jpwkx/aOD5RmQVGfivgjuXYPEjhiukOVptaXD46z1q8Kor03o9G3Aq3NEpGU7D g9cfidlXb//n4SQWytZTZLVGOHjc4nw= Authentication-Results: imf28.hostedemail.com; dkim=none; spf=pass (imf28.hostedemail.com: domain of "SRS0=a78l=ZI=goodmis.org=rostedt@kernel.org" designates 139.178.84.217 as permitted sender) smtp.mailfrom="SRS0=a78l=ZI=goodmis.org=rostedt@kernel.org"; dmarc=none X-Stat-Signature: c5x8s14spm5sahica49ecd8w11yaoic5 X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 2A2CDC0085 X-HE-Tag: 1662405363-513930 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: On Mon, 5 Sep 2022 11:44:55 -0700 Nadav Amit wrote: > I would note that I have a solution in the making (which pretty much works) > for this matter, and does not require any kernel changes. It produces a > call stack that leads to the code that lead to syscall failure. > > The way it works is by using seccomp to trap syscall failures, and then > setting ftrace function filters and kprobes on conditional branches, > indirect branch targets and function returns. Ooh nifty! > > Using symbolic execution, backtracking is performed and the condition that > lead to the failure is then pin-pointed. > > I hope to share the code soon. Looking forward to it. -- Steve