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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 5D744C43381 for ; Mon, 18 Feb 2019 14:30:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2E7CE2081B for ; Mon, 18 Feb 2019 14:30:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550500248; bh=X/h8T4WRmWKZJ55FqVEnOx+VaToCnT2gcqf/P5RnIv8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Bkt9cZQ7HhI88v6OIgre94cVJUU0vwDHNBwbjhEUq2ukQsEmdNjKAut4pEm8bevEO 8hUhLuMJfxR8QTN3vnMwTQHYm3x6mpDmV7Xckws5O0B5ADyBqz3qfBavP7oQ9OIKv7 AhJYz5oTHUnk9dq99OFYISZqeu+G+Xvq12rkHdyE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388349AbfBRN60 (ORCPT ); Mon, 18 Feb 2019 08:58:26 -0500 Received: from mail.kernel.org ([198.145.29.99]:39088 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388330AbfBRN6W (ORCPT ); Mon, 18 Feb 2019 08:58:22 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (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 1159D2077B; Mon, 18 Feb 2019 13:58:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550498301; bh=X/h8T4WRmWKZJ55FqVEnOx+VaToCnT2gcqf/P5RnIv8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zz/kaTLP0Kdt9Nw2ML8aFgOKNRwnD3361fM1AUR94s1it1UBzeXExKRyK1PWFVQjv Q8nx/g+yCjh3GEoYJur8ZJHY5WurEO+f/d5nJx80vA0pahS9PEDupKGMHh33KQbjzn xBBEqpa08SJSLemvzhtY3wUZH47yn+XEvERB5kQk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Julien Thierry , Russell King , "David A. Long" , Sasha Levin Subject: [PATCH 4.9 09/58] ARM: 8795/1: spectre-v1.1: use put_user() for __put_user() Date: Mon, 18 Feb 2019 14:43:30 +0100 Message-Id: <20190218133509.302032279@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190218133508.567416115@linuxfoundation.org> References: <20190218133508.567416115@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ Commit e3aa6243434fd9a82e84bb79ab1abd14f2d9a5a7 upstream. When Spectre mitigation is required, __put_user() needs to include check_uaccess. This is already the case for put_user(), so just make __put_user() an alias of put_user(). Signed-off-by: Julien Thierry Signed-off-by: Russell King Signed-off-by: David A. Long Reviewed-by: Julien Thierry Signed-off-by: Sasha Levin --- arch/arm/include/asm/uaccess.h | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/arch/arm/include/asm/uaccess.h b/arch/arm/include/asm/uaccess.h index 9ae888775743..b61acd62cffb 100644 --- a/arch/arm/include/asm/uaccess.h +++ b/arch/arm/include/asm/uaccess.h @@ -400,6 +400,14 @@ do { \ __pu_err; \ }) +#ifdef CONFIG_CPU_SPECTRE +/* + * When mitigating Spectre variant 1.1, all accessors need to include + * verification of the address space. + */ +#define __put_user(x, ptr) put_user(x, ptr) + +#else #define __put_user(x, ptr) \ ({ \ long __pu_err = 0; \ @@ -407,12 +415,6 @@ do { \ __pu_err; \ }) -#define __put_user_error(x, ptr, err) \ -({ \ - __put_user_switch((x), (ptr), (err), __put_user_nocheck); \ - (void) 0; \ -}) - #define __put_user_nocheck(x, __pu_ptr, __err, __size) \ do { \ unsigned long __pu_addr = (unsigned long)__pu_ptr; \ @@ -492,6 +494,7 @@ do { \ : "r" (x), "i" (-EFAULT) \ : "cc") +#endif /* !CONFIG_CPU_SPECTRE */ #ifdef CONFIG_MMU extern unsigned long __must_check -- 2.19.1