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=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,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 EF224C10F04 for ; Thu, 14 Feb 2019 14:49:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BE06B222DC for ; Thu, 14 Feb 2019 14:49:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="Ioo7iJvX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2407302AbfBNOtn (ORCPT ); Thu, 14 Feb 2019 09:49:43 -0500 Received: from mail-qt1-f195.google.com ([209.85.160.195]:34690 "EHLO mail-qt1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2407294AbfBNOtm (ORCPT ); Thu, 14 Feb 2019 09:49:42 -0500 Received: by mail-qt1-f195.google.com with SMTP id w4so7141070qtc.1 for ; Thu, 14 Feb 2019 06:49:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=3EUxbJ4Gs2ebNHsOGp92F1GifsPVltaoVmIWi4xEEBo=; b=Ioo7iJvX7d6MQbbygi6AqmTR717u8Nn9q4l6Lz9RRC1h2d3f5BI8HB987KC8ic+sht SQoxNNsUvDcnct0MF5I7HmqlYkNS2SnlTLS6JYqlJzKgIMXBTIjxD/ZV1tuqzpb8uBNH PT+t9K7fRpu0muIzuxJZ8aQn96cPNTdDS6TQkBjJDluavck2nBuD8bXJAUe6O24/tHBv IqnIxPiZ3ZUbgvPrcsMySFm4fRYjuYQ18ImpPHE0oknCl1zf75nzAP2rV/RLyoq3jQsY t32Aj633ROdtEItbocW7xgTqUgYH/Skv+qTXrlsGaJwxZDOZWqyXOnVmgqKtIjJhzjRX PAlA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=3EUxbJ4Gs2ebNHsOGp92F1GifsPVltaoVmIWi4xEEBo=; b=KGt2odFN4aYx1/FWCaye/HsdD0n1gNKqAWXkmGj8UBeaE31SA1RwqZ7PbPGCX81BRI 88zlBcbAESx0zsK0fgKgkqBCCXziQdpUsdJKqNbeI+qCCiJfdSeWZ8cDD4jik2kaCn9t PpKPqnXMs6piBBFCEF2Ed3OPxSYRk3lAe50S2aFZon39ITAeD5lbpGu0n61tmsixs5Qn SyVjshId+897dQ27v1Dek0j+14ih6JETI9BG2CpP1+SzkWKOJSmL8RV8kz9GTAiB/yr2 LFEfd/gS4Y6BsgtvwTwovcDnYPD+VH0hLFpDk4fJrR0z8FtxsjSu5iL/O2pgWXH9K+t1 C52Q== X-Gm-Message-State: AHQUAuZKq9NVjtOwD7agLqw8OzpIoxjwQjOEx2s1t3tmrR+fECHPKtyI PDg5y1YPYi7vd40cVSx99Z7YBZttMQE= X-Google-Smtp-Source: AHgI3IZsomSLVmJUtA5Ud1tLgJJgLsgoW/v5KOp+5LVD6Kt1FqCgcuILjIUVEQBX6zyvIgGiuH5Uqg== X-Received: by 2002:a0c:8816:: with SMTP id 22mr3233956qvl.247.1550155781094; Thu, 14 Feb 2019 06:49:41 -0800 (PST) Received: from localhost.localdomain (pool-72-71-243-63.cncdnh.fast00.myfairpoint.net. [72.71.243.63]) by smtp.googlemail.com with ESMTPSA id k66sm1498919qkc.25.2019.02.14.06.49.39 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 14 Feb 2019 06:49:40 -0800 (PST) From: David Long To: stable@vger.kernel.org, Russell King - ARM Linux , Florian Fainelli , Julien Thierry , Tony Lindgren , Marc Zyngier , Greg KH , Mark Rutland Cc: Will Deacon , Mark Brown , linux-kernel@vger.kernel.org Subject: [PATCH 4.9 06/16] ARM: 8795/1: spectre-v1.1: use put_user() for __put_user() Date: Thu, 14 Feb 2019 09:49:20 -0500 Message-Id: <20190214144930.27539-7-dave.long@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190214144930.27539-1-dave.long@linaro.org> References: <20190214144930.27539-1-dave.long@linaro.org> Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Julien Thierry 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 --- 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 -- 2.17.1