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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 58116C433EF for ; Mon, 11 Oct 2021 09:53:05 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 00F326109E for ; Mon, 11 Oct 2021 09:53:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 00F326109E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=canonical.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 6953C6B006C; Mon, 11 Oct 2021 05:53:04 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 644FA6B0071; Mon, 11 Oct 2021 05:53:04 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 53447900002; Mon, 11 Oct 2021 05:53:04 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0188.hostedemail.com [216.40.44.188]) by kanga.kvack.org (Postfix) with ESMTP id 44B606B006C for ; Mon, 11 Oct 2021 05:53:04 -0400 (EDT) Received: from smtpin40.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id F0114181B2E34 for ; Mon, 11 Oct 2021 09:53:03 +0000 (UTC) X-FDA: 78683693046.40.FE6179B Received: from smtp-relay-internal-0.canonical.com (smtp-relay-internal-0.canonical.com [185.125.188.122]) by imf02.hostedemail.com (Postfix) with ESMTP id 40FFE70044F1 for ; Mon, 11 Oct 2021 09:53:03 +0000 (UTC) Received: from mail-ed1-f69.google.com (mail-ed1-f69.google.com [209.85.208.69]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-internal-0.canonical.com (Postfix) with ESMTPS id 6C72140012 for ; Mon, 11 Oct 2021 09:53:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1633945981; bh=x+ebBDbVVXbydAVIXajg3Ac0CDuAQFka9vVAII+KcTQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:In-Reply-To; b=pab4lT/n9n/AWs3QXPRw9fVihJFQzRImHNmnTfhft6hS4SlrHRAzeVR8zDGrCdsVG wRszltynxpf33rWsAeuhq2dMX0vLmYjH36KsZ8z4hlN0Klg8dv35wV43Yhlk3Yep1l XyayoJnqQIOfzsfQ1rLDTbjm4JoCJAEl6UWDn6VxZr9oa+/POg6iRg1Otcxr1eaNPY 9rUK3TGu06Eej1Ok2YLP/nsp/wyiBeYSEY32D92ZCBnj/Xsc5zgD7tMAoshX8vBqou rom6fX7nwGF+6Pu2RL+kG9wwkm5+FmY1QmLpxXZOSIGMLqe159Vd4/Hs+cvhm+R1i2 FJ3mDLyTf51tQ== Received: by mail-ed1-f69.google.com with SMTP id c30-20020a50f61e000000b003daf3955d5aso15414897edn.4 for ; Mon, 11 Oct 2021 02:53:01 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=x+ebBDbVVXbydAVIXajg3Ac0CDuAQFka9vVAII+KcTQ=; b=qyO3bWbG+/QBbMClhkMUKhoWmfFXJw1U4n7TKgqVILMnG/2F/sPbKfDBIIVyfXgXeM Z0cVN1HJwnmhc3jSc448XpEJcSBDF3LSInPBmEmmtSEarIHQFRd1lQ6sOr0V7dHGczoH zz1Kd+pvkpFGlpfwAQVZqSgvZ235Djz5dJPZ12c3raDNiEF8BgQiOW9UaC5CPbrThdsH kbcUxIklqa20QxDNnc+dGjQQ/jvi3T0MvDazHkYgFJrFnGi1YlnsIS8ileQUQGaRcIC/ iRwHPuatfOGq73Wd56bm/t++hkni2dtgI/73sE+Ik0pg5EqCq1+Z5uSvHeLQc0pW8M5/ yToA== X-Gm-Message-State: AOAM531Z9zS9sn7X2lcqf82tQqGGSiUCIhEiHxhfoAbOWQY8LPmWGiVJ ZZZDuXkSo/dImsK128ZtGuIQZe8bfKj5QMqeawIgnfYMRlgpAQl3W4azqpVMLcaANZ6e77euu5q ZFrO51doMZ9BNkdDGxtlDCnCcOsdK X-Received: by 2002:a17:906:5d5:: with SMTP id t21mr25107361ejt.160.1633945981071; Mon, 11 Oct 2021 02:53:01 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxE3fAq+I3dMmD03BBhqJ9YsxjaReEjo4L044THoSNYQRpEsnsClapd0A8H3a911zE+4WU7XQ== X-Received: by 2002:a17:906:5d5:: with SMTP id t21mr25107343ejt.160.1633945980885; Mon, 11 Oct 2021 02:53:00 -0700 (PDT) Received: from localhost ([2001:67c:1560:8007::aac:c1b6]) by smtp.gmail.com with ESMTPSA id p7sm3955215edr.6.2021.10.11.02.53.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 Oct 2021 02:53:00 -0700 (PDT) Date: Mon, 11 Oct 2021 11:52:59 +0200 From: Andrea Righi To: Dmitry Vyukov Cc: Marco Elver , Alexander Potapenko , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: BUG: soft lockup in __kmalloc_node() with KFENCE enabled Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 40FFE70044F1 X-Stat-Signature: sk8knpzqfwgmodohjtb5futmjq7r5433 Authentication-Results: imf02.hostedemail.com; dkim=pass header.d=canonical.com header.s=20210705 header.b="pab4lT/n"; dmarc=pass (policy=none) header.from=canonical.com; spf=pass (imf02.hostedemail.com: domain of andrea.righi@canonical.com designates 185.125.188.122 as permitted sender) smtp.mailfrom=andrea.righi@canonical.com X-HE-Tag: 1633945983-262513 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, Oct 11, 2021 at 11:23:32AM +0200, Andrea Righi wrote: ... > > You seem to use the default 20s stall timeout. FWIW syzbot uses 160 > > secs timeout for TCG emulation to avoid false positive warnings: > > https://github.com/google/syzkaller/blob/838e7e2cd9228583ca33c49a39aea4d863d3e36d/dashboard/config/linux/upstream-arm64-kasan.config#L509 > > There are a number of other timeouts raised as well, some as high as > > 420 seconds. > > I see, I'll try with these settings and see if I can still hit the soft > lockup messages. Still getting soft lockup messages even with the new timeout settings: [ 462.663766] watchdog: BUG: soft lockup - CPU#2 stuck for 430s! [systemd-udevd:168] [ 462.755758] watchdog: BUG: soft lockup - CPU#3 stuck for 430s! [systemd-udevd:171] [ 924.663765] watchdog: BUG: soft lockup - CPU#2 stuck for 861s! [systemd-udevd:168] [ 924.755767] watchdog: BUG: soft lockup - CPU#3 stuck for 861s! [systemd-udevd:171] -Andrea