From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laura Abbott Subject: [RFC 3/3] arm: add DEBUG_SET_MODULE_RONX option to Kconfig Date: Wed, 12 Jun 2013 10:23:30 -0700 Message-ID: <1371057810-3189-4-git-send-email-lauraa@codeaurora.org> References: <1371057810-3189-1-git-send-email-lauraa@codeaurora.org> Return-path: Received: from smtp.codeaurora.org ([198.145.11.231]:44145 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755392Ab3FLRXn (ORCPT ); Wed, 12 Jun 2013 13:23:43 -0400 In-Reply-To: <1371057810-3189-1-git-send-email-lauraa@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org List-Id: linux-arm-msm@vger.kernel.org To: linux-arm-kernel@lists.infradead.org, Russell King Cc: Will Deacon , Catalin Marinas , Nicoas Pitre , linux-arm-msm@vger.kernel.org, Laura Abbott Now that all the page setting infrastructure is in place, Add the DEBUG_SET_MODULE_RONX to the ARM debugging Kconfig. When turned on, data sections for modules will be marked as NX and read only sections will be marked as such. Signed-off-by: Laura Abbott --- arch/arm/Kconfig.debug | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-) diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 1d41908..12bca63 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -692,4 +692,15 @@ config PID_IN_CONTEXTIDR additional instructions during context switch. Say Y here only if you are planning to use hardware trace tools with this kernel. +config DEBUG_SET_MODULE_RONX + bool "Set loadable kernel module data as NX and text as RO" + depends on MODULES + ---help--- + This option helps catch unintended modifications to loadable + kernel module's text and read-only data. It also prevents execution + of module data. Such protection may interfere with run-time code + patching and dynamic kernel tracing - and they might also protect + against certain classes of kernel exploits. + If in doubt, say "N". + endmenu -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation