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=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,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 16A21C18E5B for ; Tue, 17 Mar 2020 14:03:20 +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 C20CC205ED for ; Tue, 17 Mar 2020 14:03:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C20CC205ED Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 48hZdJ3FPTzDqPw for ; Wed, 18 Mar 2020 01:03:16 +1100 (AEDT) Received: from ozlabs.org (bilbo.ozlabs.org [IPv6:2401:3900:2:1::2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 48hYYR4ww1zDqdL for ; Wed, 18 Mar 2020 00:14:51 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Received: by ozlabs.org (Postfix, from userid 1034) id 48hYYQ3LhHz9sSX; Wed, 18 Mar 2020 00:14:50 +1100 (AEDT) X-powerpc-patch-notification: thanks X-powerpc-patch-commit: cc6f0e39000900e5dd1448103a9571f0eccd7d4e In-Reply-To: To: Christophe Leroy , Benjamin Herrenschmidt , Paul Mackerras , ndesaulniers@google.com From: Michael Ellerman Subject: Re: [PATCH] powerpc/32: Fix missing NULL pmd check in virt_to_kpte() Message-Id: <48hYYQ3LhHz9sSX@ozlabs.org> Date: Wed, 18 Mar 2020 00:14:50 +1100 (AEDT) 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: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Sat, 2020-03-07 at 10:09:15 UTC, Christophe Leroy wrote: > Commit 2efc7c085f05 ("powerpc/32: drop get_pteptr()"), > replaced get_pteptr() by virt_to_kpte(). But virt_to_kpte() lacks a > NULL pmd check and returns an invalid non NULL pointer when there > is no page table. > > Reported-by: Nick Desaulniers > Fixes: 2efc7c085f05 ("powerpc/32: drop get_pteptr()") > Signed-off-by: Christophe Leroy Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/cc6f0e39000900e5dd1448103a9571f0eccd7d4e cheers