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=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 73FB5C54FCB for ; Tue, 21 Apr 2020 02:59:06 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3C8DA2084D for ; Tue, 21 Apr 2020 02:59:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="E52zdUtc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3C8DA2084D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C7C648E0005; Mon, 20 Apr 2020 22:59:05 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C2BD98E0003; Mon, 20 Apr 2020 22:59:05 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B41EA8E0005; Mon, 20 Apr 2020 22:59:05 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0104.hostedemail.com [216.40.44.104]) by kanga.kvack.org (Postfix) with ESMTP id 9AD3D8E0003 for ; Mon, 20 Apr 2020 22:59:05 -0400 (EDT) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 617AD45DA for ; Tue, 21 Apr 2020 02:59:05 +0000 (UTC) X-FDA: 76730355450.18.night33_8987b1cdcbf46 X-HE-Tag: night33_8987b1cdcbf46 X-Filterd-Recvd-Size: 1949 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf35.hostedemail.com (Postfix) with ESMTP for ; Tue, 21 Apr 2020 02:59:04 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CC3C320782; Tue, 21 Apr 2020 02:59:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587437944; bh=W3MzZqLv72l10lePV5P3s2AV3T4CM7dFmWlBV+gveZk=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=E52zdUtcXbBhlSAwu0JC0W09eFVNtik1wixT7L0iRFiUrQxgyOnu69HNxCeFQK6Ig my+2RBnLM46sKg75wo+yultZE4u0I+yYDR65Dvv/IxvF+/ySrPkDL9dXQ5SoE2w7Nq fWgSnVOSXj2rtd9REBwnXrn0RVSqdHzhzXJTfdbc= Date: Mon, 20 Apr 2020 19:59:03 -0700 From: Andrew Morton To: agordeev@linux.ibm.com Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 2/2] mm/mmap.c: do not allow mappings outside of allowed limits Message-Id: <20200420195903.93455e087985b423f97bdfe3@linux-foundation.org> In-Reply-To: References: X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit 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, 23 Mar 2020 14:29:29 +0100 agordeev@linux.ibm.com wrote: > It is possible to request a fixed mapping address below > mmap_min_addr and succeed. This update adds early checks > of mmap_min_addr and mmap_end boundaries and fixes the > above issue. Does this solve any known problems? If not, what is the motivation for the change?