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=-8.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 9556FC433DB for ; Sun, 24 Jan 2021 11:42:04 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 06D5822C9D for ; Sun, 24 Jan 2021 11:42:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 06D5822C9D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4DNrgs2bJwzDqMw for ; Sun, 24 Jan 2021 22:42:01 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=casper.srs.infradead.org (client-ip=2001:8b0:10b:1236::1; helo=casper.infradead.org; envelope-from=batv+340bc88fe697da228867+6363+infradead.org+hch@casper.srs.infradead.org; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=casper.20170209 header.b=UvTPXRec; dkim-atps=neutral Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4DNrVN5Bz7zDqyb for ; Sun, 24 Jan 2021 22:33:48 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=ACB8L1iH4Gc89YVix2D94YMUoC0lAHVoOtd7z7k4gbA=; b=UvTPXRec/KKC/vVCNhylGppLtA 4gnsAaSCRXS7ZbiRj/1I81m2v5V7rxONcoEdtCoTFbPhgDZHWqhrqlE3hNoqnsm4OjM4RIo1+mhj2 xdDThKzazfQmoaRm+CLVmPbdK+gi8y9nPSLzzgyA1jT+QjKm/0TTUCyPSND4zTKk/B1SFxUeDz2jC f44ediPoO5ZYs0CTAUMJUfXGkYxtD7rJ7IKWEa949RJ/6cdBlTeMd1I6z1Rp/78jzVhU+4RJot1/1 bh3jTbubINajUJMB3xYPQI7D2cCbRTPnaHaGbhM/WhVXvHl4MRmeQ9Hyuu5O9hcbDD+uBJhA7Lxyd zddL0biA==; Received: from hch by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1l3ddB-002ufv-2n; Sun, 24 Jan 2021 11:32:39 +0000 Date: Sun, 24 Jan 2021 11:32:33 +0000 From: Christoph Hellwig To: Nicholas Piggin Subject: Re: [PATCH v10 02/12] mm: apply_to_pte_range warn and fail if a large pte is encountered Message-ID: <20210124113233.GB694255@infradead.org> References: <20210124082230.2118861-1-npiggin@gmail.com> <20210124082230.2118861-3-npiggin@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210124082230.2118861-3-npiggin@gmail.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, Ding Tianhong , linux-kernel@vger.kernel.org, Christoph Hellwig , linux-mm@kvack.org, Zefan Li , Jonathan Cameron , Andrew Morton , Rick Edgecombe , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Sun, Jan 24, 2021 at 06:22:20PM +1000, Nicholas Piggin wrote: > apply_to_pte_range might mistake a large pte for bad, or treat it as a > page table, resulting in a crash or corruption. Add a test to warn and > return error if large entries are found. Looks good, Reviewed-by: Christoph Hellwig