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=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 7A13CC04AA7 for ; Tue, 14 May 2019 02:25:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4D2C2208C3 for ; Tue, 14 May 2019 02:25:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="UDw1+6Hd" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726723AbfENCZc (ORCPT ); Mon, 13 May 2019 22:25:32 -0400 Received: from mail-pg1-f195.google.com ([209.85.215.195]:39400 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726566AbfENCZb (ORCPT ); Mon, 13 May 2019 22:25:31 -0400 Received: by mail-pg1-f195.google.com with SMTP id w22so7758044pgi.6; Mon, 13 May 2019 19:25:30 -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:user-agent; bh=Zi4wszV1L43AeLT0Z8PIOWy38tTYuSZF/HdHyWxecsY=; b=UDw1+6HdTlVp15oFELQcYeP5tV9aX4WE2CTmk/VFT9j/uRDSGzkXgwHKipfBdjUcy6 iWd5TAVfBECyekH1/M3I65DO8JG6bsdwQiYpZPb+IvL2/NRDrhMlO6vl9tfI1DTC2n8V ZQObeHztzolzKrcIN2b/9VCj+OdGEtNRTQMUz8nfylBLkUKYFsgCyTvqrBD8JblWqBMs 2ATuHVX+eMGT7vY3UOYNRORuXGhZjogeHrl6sZejHqhzP1ylwRwstzz6oGskofNicyFJ dU04R9JVeM7RaJ6I2pxqlhwoRSiRJyHo8rLCRYT0ThJgyxpnMnnsbjh3cJf1XWqOhld0 Moqw== 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:user-agent; bh=Zi4wszV1L43AeLT0Z8PIOWy38tTYuSZF/HdHyWxecsY=; b=ngkw1ElmV3Ih2+FFGHeSO/N27D7B2pFHa8h8UG75bQjbDXSyR3E3A+kFnMfN0I0bx8 /TaRLjioTI96uLgzIl8WnzgsbiWt5w2mPmgGrSXC+Jc2Pfj+7zRjGmIEKvF0ovPINCbP arjb+A1qtTK2Tw+bD3wPqvY6bjLTKdHnfyrRhwr15ETqwj9vwxYRqzOINxoYqu7kZtkU KT+lutBEo279VbMcPIwzo+rsTRfRE/Dd3ljZ0XVjreMxPDJ8Et59e7WvMa0VKcOV0S7S vRc5uSqhX89OIM7dFOGoMVQMzQjCsGcXiJEFzZqGNdYgcVKlbtwU3u5O8m9YUN/x2XOn jxFg== X-Gm-Message-State: APjAAAWNYCi52dqsHuQ9Foo/GAMRxUgJEReA2CcwkfOq2rUUHFKY1PWr Kos/+HKpAbm2TcfIqlsnsW8= X-Google-Smtp-Source: APXvYqwA6b0Z8MgrtwzlDdj6bF9A8j85qLr4jxGimHQO5UZWJdPr+G2gpISwBf6oV7oS7hzca+w4yw== X-Received: by 2002:a62:6d47:: with SMTP id i68mr37943522pfc.189.1557800730620; Mon, 13 May 2019 19:25:30 -0700 (PDT) Received: from localhost ([39.7.55.172]) by smtp.gmail.com with ESMTPSA id g83sm19072131pfb.158.2019.05.13.19.25.28 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 13 May 2019 19:25:29 -0700 (PDT) Date: Tue, 14 May 2019 11:25:26 +0900 From: Sergey Senozhatsky To: Petr Mladek Cc: Andy Shevchenko , David Laight , 'christophe leroy' , Steven Rostedt , Linus Torvalds , Rasmus Villemoes , "Tobin C . Harding" , Michal Hocko , Sergey Senozhatsky , "linux-kernel@vger.kernel.org" , Michael Ellerman , "linuxppc-dev@lists.ozlabs.org" , Russell Currey , Stephen Rothwell , Heiko Carstens , "linux-arch@vger.kernel.org" , "linux-s390@vger.kernel.org" , Martin Schwidefsky , Sergey Senozhatsky Subject: Re: [PATCH] vsprintf: Do not break early boot with probing addresses Message-ID: <20190514022526.GA6683@jagdpanzerIV> References: <20190510081635.GA4533@jagdpanzerIV> <20190510084213.22149-1-pmladek@suse.com> <20190510122401.21a598f6@gandalf.local.home> <096d6c9c17b3484484d9d9d3f3aa3a7c@AcuMS.aculab.com> <20190513091320.GK9224@smile.fi.intel.com> <20190513124220.wty2qbnz4wo52h3x@pathway.suse.cz> <20190514020730.GA651@jagdpanzerIV> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190514020730.GA651@jagdpanzerIV> User-Agent: Mutt/1.11.4 (2019-03-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (05/14/19 11:07), Sergey Senozhatsky wrote: > How about this: > > if ptr < PAGE_SIZE -> "(null)" No, this is totally stupid. Forget about it. Sorry. > if IS_ERR_VALUE(ptr) -> "(fault)" But Steven's "(fault)" is nice. -ss