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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,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 0440EC282DD for ; Thu, 23 May 2019 10:24:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D1E152168B for ; Thu, 23 May 2019 10:24:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730541AbfEWKYj (ORCPT ); Thu, 23 May 2019 06:24:39 -0400 Received: from foss.arm.com ([217.140.101.70]:42706 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727434AbfEWKYi (ORCPT ); Thu, 23 May 2019 06:24:38 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 7582D15AB; Thu, 23 May 2019 03:24:38 -0700 (PDT) Received: from e111045-lin.cambridge.arm.com (unknown [10.1.39.23]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 5623A3F718; Thu, 23 May 2019 03:24:36 -0700 (PDT) From: Ard Biesheuvel To: linux-arm-kernel@lists.infradead.org Cc: marc.zyngier@arm.com, mark.rutland@arm.com, linux-kernel@vger.kernel.org, Ard Biesheuvel , Nadav Amit , Rick Edgecombe , Peter Zijlstra , Andrew Morton , Will Deacon , Masami Hiramatsu , James Morse Subject: [PATCH 4/4] arm64: bpf: do not allocate executable memory Date: Thu, 23 May 2019 11:22:56 +0100 Message-Id: <20190523102256.29168-5-ard.biesheuvel@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190523102256.29168-1-ard.biesheuvel@arm.com> References: <20190523102256.29168-1-ard.biesheuvel@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The BPF code now takes care of mapping the code pages executable after mapping them read-only, to ensure that no RWX mapped regions are needed, even transiently. This means we can drop the executable permissions from the mapping at allocation time. Signed-off-by: Ard Biesheuvel --- arch/arm64/net/bpf_jit_comp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c index df845cee438e..aef4ff467222 100644 --- a/arch/arm64/net/bpf_jit_comp.c +++ b/arch/arm64/net/bpf_jit_comp.c @@ -981,7 +981,7 @@ void *bpf_jit_alloc_exec(unsigned long size) { return __vmalloc_node_range(size, PAGE_SIZE, BPF_JIT_REGION_START, BPF_JIT_REGION_END, GFP_KERNEL, - PAGE_KERNEL_EXEC, 0, NUMA_NO_NODE, + PAGE_KERNEL, 0, NUMA_NO_NODE, __builtin_return_address(0)); } -- 2.17.1