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=-2.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 22546C2BA19 for ; Mon, 6 Apr 2020 12:59:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E1E96206F5 for ; Mon, 6 Apr 2020 12:59:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="L6EHQhR0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728202AbgDFM7h (ORCPT ); Mon, 6 Apr 2020 08:59:37 -0400 Received: from mail-lj1-f195.google.com ([209.85.208.195]:42137 "EHLO mail-lj1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728077AbgDFM7h (ORCPT ); Mon, 6 Apr 2020 08:59:37 -0400 Received: by mail-lj1-f195.google.com with SMTP id q19so14498154ljp.9 for ; Mon, 06 Apr 2020 05:59:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:date:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=klGEPOVDqn0bHzD1zMNsz5U+EKZKtsRBPVdGZkiUwzY=; b=L6EHQhR08UEDQVjIcRRQqpRuNU0ry8dFIxvNdiDx7xDskMUUR9Qij89a7fsB9R8P7c FNLySfsbN7kjbhIjoqxCQWkff9+tSezheTYzLGoyTc787WJvfO+zq7beUB8jcvIH6jtD b/Ju9d6IirvKLABMqN28hvLqxmmZdPdpKaNPzQ3C3eJsEsnsW3V/ny/DdlLq1ng9y9ME yxKZpt2sX44AEk3GjalOij6sT1SjoyhFTCz6zy+znvugFEM7l2xN7kQOlhM6PM3zQbfe WSd9k6Y/u0ADE004ob5NJ7j/qxLxw13ans4dEp/rcslIJkU5nXjdZdGI0H6f0fTc6Em4 GZYQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:date:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=klGEPOVDqn0bHzD1zMNsz5U+EKZKtsRBPVdGZkiUwzY=; b=Mgs6Qmspqv8/awo01CBwyxnJflEo88HrPXAlAFVcZZY71sjrZIbd+mMgIZM/FTK4GG PAZoaFSDX550fh+5wMGsmC1BhPaPuBKT5Vh/MQ49ThPuCMz1Ip6dx++LBnFmwTfQ9F7t 3HRPDyjyOi2TiKQ9dC5EFtA3taNXCtqxDbya8klmAw08yHkGFPu05GnlYj4Wwop6RNi3 CwKmQNw9XDi8L1VtSpT2R+zcshdu0bv2GGN+rCOx2XVTHnOAGYAFtevq+/FHN/AILQEZ ROtXNkK+sY3ng4rbkMda8a66zZ98KkEAawRdkZx+3KW6HiEzKjwa8CUNafAM5xC8km7T TI/Q== X-Gm-Message-State: AGi0PuaO8nXRJrCCaK9xO+lIvZUjCkiXRGyjxdtbuSEDtVpB24uoV6fF fUS4TBsOXovBl7GdWrRDROLQP6ZA4h4= X-Google-Smtp-Source: APiQypIyvIV73lkHcnEsV82UaxQt9zdT0TXyQVEzlvxTzFOiCLsas0M8KBVZfMWG1nuc63LkYNeQXg== X-Received: by 2002:a2e:9616:: with SMTP id v22mr11512135ljh.107.1586177976108; Mon, 06 Apr 2020 05:59:36 -0700 (PDT) Received: from pc636 (h5ef52e31.seluork.dyn.perspektivbredband.net. [94.245.46.49]) by smtp.gmail.com with ESMTPSA id t24sm8822318lfk.90.2020.04.06.05.59.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Apr 2020 05:59:35 -0700 (PDT) From: Uladzislau Rezki X-Google-Original-From: Uladzislau Rezki Date: Mon, 6 Apr 2020 14:59:28 +0200 To: William Kucharski Cc: Uladzislau Rezki , Peter Zijlstra , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm , jroedel@suse.de, Vlastimil Babka , Thomas Gleixner Subject: Re: [PATCH] mm/vmalloc: Sanitize __get_vm_area() arguments Message-ID: <20200406125928.GA23653@pc636> References: <20200404185229.GA424@pc636> <20200405172315.GA8404@pc636> <20200405192108.GA9429@pc636> <65663E36-DC60-4E6E-B6C6-3A0F6852543D@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <65663E36-DC60-4E6E-B6C6-3A0F6852543D@oracle.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Apr 05, 2020 at 02:49:13PM -0600, William Kucharski wrote: > That's fine. > > One could still argue size should be sanitized earlier when start and end > are, but it's a nit either way (though size is used before it's checked, > it's not in any way that could fail with bad results.) > Agree. Therefore i do not have a strong opinion here, so it basically depends on how to look at it :) -- Vlad Rezki