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 X-Spam-Level: X-Spam-Status: No, score=-10.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1003FC4361B for ; Fri, 18 Dec 2020 19:48:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AA22423B6C for ; Fri, 18 Dec 2020 19:48:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733281AbgLRTrz (ORCPT ); Fri, 18 Dec 2020 14:47:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52516 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733261AbgLRTrz (ORCPT ); Fri, 18 Dec 2020 14:47:55 -0500 Received: from mail-pf1-x42b.google.com (mail-pf1-x42b.google.com [IPv6:2607:f8b0:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 32155C0617A7 for ; Fri, 18 Dec 2020 11:47:15 -0800 (PST) Received: by mail-pf1-x42b.google.com with SMTP id q22so2125694pfk.12 for ; Fri, 18 Dec 2020 11:47:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=yg7MsJ706SbGSnOta6LMLPM0AHpDF071o+e8GGkKZg8=; b=MmZc/KovMFwoplkadFGMaox8iCBzd4feey0XKRQQeUKfkxGVDdJ8XqmymSiZkcfiZj Hs9uHSwN2IiqYE6wlEk2FJT0FPzYqQTBP3bwa8OF5UbBc4ArZvUECBYhuP9vJXPCbHwg uss+tj7Bj/m53hp1dUCizS1vCS20ZubPt8XnM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=yg7MsJ706SbGSnOta6LMLPM0AHpDF071o+e8GGkKZg8=; b=QgXnyikb2bNLP5Oz8XQypwRwd8K6d0i8NtMVNUrz+rvW08ohy41FZl1BTjPmKG/8g0 8P5Ubc2hYN78IFdRYwKF3DYNEUb2o5qOMjWNvgbwio892IKxN7rnDaHlbRql8l1reblS NIPj0fL+5EVcXc6gSrUjyCpu7e7phsLt1iuy6wsEImTQfYzy6ZXFLjWAOPVnWeuao0j3 6MTbUn+HrvVkQOAe+Av6DGbWlXsKNyxXmDaOAo/G/58+NIgS8xj4+PViXjv/daE+8ck8 EsZcELDd421b0G9jFmlnvP67m+6pD5X9CnX9m0v68RAA6bhM3RXV1HvLTrTSOoiBx9Yo c4sA== X-Gm-Message-State: AOAM531zWLWDcfasGqpObeKOvxyAtdsNPd7khpa1wvdHFjUb13gAnBoa 1R7eSMBc+f9+PFi/S2QXHZPV1w== X-Google-Smtp-Source: ABdhPJy717r6dsRuH1Jj7QxMmKipllOb0j2Wah/uZFjOeYQ1zQicv7sNnkUOzI5HpY2uspOqq+zTMA== X-Received: by 2002:a63:5004:: with SMTP id e4mr5607622pgb.338.1608320834644; Fri, 18 Dec 2020 11:47:14 -0800 (PST) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id t25sm9493002pgv.30.2020.12.18.11.47.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Dec 2020 11:47:13 -0800 (PST) Date: Fri, 18 Dec 2020 11:47:12 -0800 From: Kees Cook To: Dmitry Vyukov Cc: syzbot , LKML , syzkaller-bugs Subject: Re: upstream boot error: UBSAN: null-ptr-deref in corrupted Message-ID: <202012181131.A231B861@keescook> References: <000000000000b6cd8d05b6a640ae@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Dec 17, 2020 at 11:38:30AM +0100, Dmitry Vyukov wrote: > On Thu, Dec 17, 2020 at 11:14 AM syzbot > wrote: > > > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: accefff5 Merge tag 'arm-soc-omap-genpd-5.11' of git://git... > > git tree: upstream > > console output: https://syzkaller.appspot.com/x/log.txt?x=14567b7f500000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=1e6efc730c219bd4 > > dashboard link: https://syzkaller.appspot.com/bug?extid=73d662376f16e2a7336d > > compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project.git ca2dcbd030eadbf0aa9b660efe864ff08af6e18b) > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+73d662376f16e2a7336d@syzkaller.appspotmail.com > > +Kees > > Not sure if it's related to UBSAN or not, but we didn't used to get > empty stack traces. > Either way syzbot can't boot the upstream kernel anymore. _none_ of them? :( Are you able to see which UBSAN config is tweaking this? -- Kees Cook