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=-3.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 C0F51C4346E for ; Mon, 28 Sep 2020 02:07:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 776EF205F4 for ; Mon, 28 Sep 2020 02:07:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="e4rQ4W8X" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726526AbgI1CHz (ORCPT ); Sun, 27 Sep 2020 22:07:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38656 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726442AbgI1CHz (ORCPT ); Sun, 27 Sep 2020 22:07:55 -0400 Received: from mail-pg1-x543.google.com (mail-pg1-x543.google.com [IPv6:2607:f8b0:4864:20::543]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 06508C0613CE for ; Sun, 27 Sep 2020 19:07:54 -0700 (PDT) Received: by mail-pg1-x543.google.com with SMTP id 34so6925158pgo.13 for ; Sun, 27 Sep 2020 19:07:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=GGsX21ljFjqhDy91LfP82RiAAmGC1fdjtYTx0gxvs+A=; b=e4rQ4W8Xhp4Bg5H+P02CiNhfbWk5y8lTrzPWk0fLFHJyVc72jIPJd9j85HH6Jah0Mk Kdr+hboZHB0cadXcHKD6/funWe4NWsG/EHgvLrxcPYf1LVLA2N5bQuPdDotpIy9fE6wR 3xbV4r5aYRh33EcMjb8ao7zVxsnQsyIzbmkK9/319Vx3ZaUUw5NJoGAqOtT876JQgdF7 E56fcK1sh6ehbTyXfKVPvDL3OCZHAgZ29+HCIdXngRwvZgiOrOg5SVN44Z7dSJwqchhm vSLPZpO2CQK6i6gEJwVYDzQ4lMe6bc7gSi22bxx1DIC6B+96Tu+C+0DxDQo1m5YEetO4 3Rpg== 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=GGsX21ljFjqhDy91LfP82RiAAmGC1fdjtYTx0gxvs+A=; b=pWCLwts3mtpWili0AhP8VJ7jxTc54MMtZYl1UpCdrnlFJam6uBJqPD4JXPeziwRpaR I2QXWz+av/+nGII3ETGPMh7hhQDXEorbQKts6fWCUBGI2WpFCU4O6TTzuUEX7Yk6Ckou QNLFokE3ClnGZGOEnc1q39mFRXgFRNDCkQuqMNokT0dIEDKIJ2QVeTZsWx/6fq3A2pNn KDmRIjNx3mNGt8s3UB8KLRN+/JIGE9PkgqTx1yYkhv/8K3z1c6LuTmGjPuAJs2hgW2fE KP5IzDqGZXZ0OjVtfcmejTKxQ5jfqwM6Pujzblxzx7Rett2n/v1ygwlhu909odXTqkz3 wnPg== X-Gm-Message-State: AOAM532/OsSH1eegt606qr9yvVHv+Fnx5cJenoZM784ys58a1e+b94+M 81NOjNleDO+qA54z5phBeDA= X-Google-Smtp-Source: ABdhPJxzPDfKZ1m2ihcznouH4FTWNhaF2WKONPTJBe0rw/ArjZAkRoOfdB5sg+TInHOYrsGoiiox6Q== X-Received: by 2002:a17:902:8d86:b029:d1:9237:6dfd with SMTP id v6-20020a1709028d86b02900d192376dfdmr9333630plo.22.1601258874421; Sun, 27 Sep 2020 19:07:54 -0700 (PDT) Received: from localhost ([2409:10:2e40:5100:6e29:95ff:fe2d:8f34]) by smtp.gmail.com with ESMTPSA id e17sm9451626pff.6.2020.09.27.19.07.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Sep 2020 19:07:53 -0700 (PDT) Date: Mon, 28 Sep 2020 11:07:52 +0900 From: Sergey Senozhatsky To: Dmitry Vyukov Cc: Petr Mladek , Sergey Senozhatsky , LKML , Steven Rostedt , John Ogness Subject: Re: KASAN: global-out-of-bounds in console_unlock Message-ID: <20200928020752.GA871730@jagdpanzerIV.localdomain> References: 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 Cc-ing John and Steven On (20/09/27 11:12), Dmitry Vyukov wrote: > Hi printk maintainers, > > I've got the following out-of-bounds in printk code. > This is on next-20200925. Config is attached. > This is just on pr_cont("\n"). Something overreads the string. > > ================================================================== > BUG: KASAN: global-out-of-bounds in memchr+0x65/0x80 lib/string.c:1058 > Read of size 1 at addr ffffffff8c68c860 by task swapper/0/0 Thanks for the report. I think this should be fixed by https://lore.kernel.org/lkml/20200926015526.8921-1-john.ogness@linutronix.de/ -ss