From patchwork Thu Oct 10 08:36:40 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 11182937 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 99B981709 for ; Thu, 10 Oct 2019 08:48:30 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 72E40208C3 for ; Thu, 10 Oct 2019 08:48:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="OOVoy/yD"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="Ro0rwDwo" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 72E40208C3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=s7ZVoilcGUvAQYUdxeqa93kZ7/jxjFwE/j5P1atedVk=; b=OOVoy/yDiK6kj2 aAfI9hsDYhthA1ErQHADzMcC0ZLXs49FJzawOOKrroR6HCgdcHPvQ6y7M5lXFMCtfOzcUJ+gfyFqN ufIyG2+SR0nOoB/md9fJPwblvvVK1yUgypuO/UYkRnjEd0u+29KHPPJOcCwMKmxQvz5PMTfVDpNoX bCo6d0IWiDOaZre0me26jQW6ICQTDntJWo0b8MbCJplYuDX53n3XS8RVibZTlr2kJShEs6OJaN9aj LmxAUNLDK5ZhOw4O7osKa5UOlQXlWFnBy80zRIC0bE9cgw+ldCVH89+kzWpv4QbgeNR8edTZQ4YWs 4mlRTpxFA7gxcA/7fowg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iIU7Y-0003tt-ST; Thu, 10 Oct 2019 08:48:28 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.2 #3 (Red Hat Linux)) id 1iIU7W-0003sQ-10 for linux-arm-kernel@lists.infradead.org; Thu, 10 Oct 2019 08:48:27 +0000 Received: from localhost (83-86-89-107.cable.dynamic.v4.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 93A5B2064A; Thu, 10 Oct 2019 08:48:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570697302; bh=YzbKdnyeAdGS6SxVj6Vh8w6hl9hCK0w4wCWdFEfXuUk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ro0rwDwoEw+mUJxk2XM2SIgSadiOfYGy/Y+OBBCaGh7Qsv9MLBJrzJYG9l9DGna7l nBRGjUKnARAwkPsLJT9f+0OMMpZHDEwRmz5Fpqeqlf3Nw67GTfSVFwuvjx6oUbvr/G XiZCrikX4Rl9SBQ/7ih7idmXAeq9Ho9dPqYD2xe8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 4.19 093/114] arm64: Add sysfs vulnerability show for spectre-v1 Date: Thu, 10 Oct 2019 10:36:40 +0200 Message-Id: <20191010083613.035890528@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191010083544.711104709@linuxfoundation.org> References: <20191010083544.711104709@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191010_014826_097241_31BB3CBE X-CRM114-Status: UNSURE ( 8.80 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -5.0 (-----) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-5.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stefan Wahren , Suzuki K Poulose , Catalin Marinas , Ard Biesheuvel , Mian Yousaf Kaukab , Jeremy Linton , Andre Przywara , stable@vger.kernel.org, Greg Kroah-Hartman , Will Deacon Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Mian Yousaf Kaukab [ Upstream commit 3891ebccace188af075ce143d8b072b65e90f695 ] spectre-v1 has been mitigated and the mitigation is always active. Report this to userspace via sysfs Signed-off-by: Mian Yousaf Kaukab Signed-off-by: Jeremy Linton Reviewed-by: Andre Przywara Reviewed-by: Catalin Marinas Tested-by: Stefan Wahren Acked-by: Suzuki K Poulose Signed-off-by: Will Deacon Signed-off-by: Ard Biesheuvel Signed-off-by: Greg Kroah-Hartman --- arch/arm64/kernel/cpu_errata.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -729,3 +729,9 @@ const struct arm64_cpu_capabilities arm6 { } }; + +ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "Mitigation: __user pointer sanitization\n"); +}