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=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, 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 0CD0AC83000 for ; Wed, 29 Apr 2020 21:21:59 +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 CFB8920731 for ; Wed, 29 Apr 2020 21:21:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="SVKXrpSP"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="GGe6umc4" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CFB8920731 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.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=IuKhwbT1wm6BVDiYJVntqeMFGlxx3bdR+L3nap3tU80=; b=SVKXrpSPjZKhnw 9vrCfMUx39OZ7CR9GlRMZYuZMSw0/iYFxdtPzaD70CCHg4mAvDdCXtbJQ15lw0m9cw/D9aegBh5Q1 4rsAisYE/quLjS8UZ9UN+F77wJvE4HB57IdpVgs7TctX0Y4R59dyCnp4/tzEKDFvEcrhg500Aka90 iCqI2/ESE0KQGcxPZrnmOOT3ujX4eYHlLIeqBrQUgvvX9IU2aTe8NlPGSqF82NdBQbGKomxMI8CZ/ 6FMnDhy6X9J7Jy3u8fnwFxO84Sc35aaCrdLDIr8/6gbsQQm9RZMofVfGuRllnfJcXpBklcj4ZOnwK cthOftKGd4sKgRHGhnrw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jTu9V-0001Qk-Pk; Wed, 29 Apr 2020 21:21:57 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jTu7o-0007Mj-Dv for linux-arm-kernel@lists.infradead.org; Wed, 29 Apr 2020 21:20:19 +0000 Received: from localhost (fw-tnat.cambridge.arm.com [217.140.96.140]) (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 36C5B20731; Wed, 29 Apr 2020 21:20:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588195209; bh=4kiTRxfuAUMsKYCp/I0nVTCFGQZpgSSXCXhw0k8kr9M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GGe6umc4Rfa2t2Wysld1sottR6fQxVqfis65Hh4sNirCrxIJ8p84cBZDRDALnXM5N HZaKvOF3Z/z/uIhgj9FsuG7K2x5uUKufE4eKprmjHquIgKqY1SrJ2qEfXzlJMomvN+ jVXuV8vc6AmOZRciFc51RyzgA3q7ekpj6TlE1nnM= From: Mark Brown To: Vincenzo Frascino , Will Deacon , Catalin Marinas Subject: [PATCH v2 05/10] arm64: mm: Mark executable text as guarded pages Date: Wed, 29 Apr 2020 22:16:36 +0100 Message-Id: <20200429211641.9279-6-broonie@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200429211641.9279-1-broonie@kernel.org> References: <20200429211641.9279-1-broonie@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200429_142012_719969_8F154BA3 X-CRM114-Status: GOOD ( 11.05 ) 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: Mark Brown , Kees Cook , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org When the kernel is built for BTI and running on a system which supports it make all executable text guarded pages to ensure that loadable module and JITed BPF code is protected by BTI. Signed-off-by: Mark Brown --- arch/arm64/mm/pageattr.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/mm/pageattr.c b/arch/arm64/mm/pageattr.c index 250c49008d73..bde08090b838 100644 --- a/arch/arm64/mm/pageattr.c +++ b/arch/arm64/mm/pageattr.c @@ -126,13 +126,13 @@ int set_memory_nx(unsigned long addr, int numpages) { return change_memory_common(addr, numpages, __pgprot(PTE_PXN), - __pgprot(0)); + __pgprot(PTE_MAYBE_GP)); } int set_memory_x(unsigned long addr, int numpages) { return change_memory_common(addr, numpages, - __pgprot(0), + __pgprot(PTE_MAYBE_GP), __pgprot(PTE_PXN)); } -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel