From: Laura Abbott Date: Mon, 17 Jun 2013 17:29:14 +0000 (-0700) Subject: ARM: add DEBUG_SET_MODULE_RONX option to Kconfig X-Git-Tag: firefly_0821_release~176^2~4592^2~1^4~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=dca9aa92fc7caa3620b31ced1535968f4aeeb967;p=firefly-linux-kernel-4.4.55.git ARM: add DEBUG_SET_MODULE_RONX option to Kconfig 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 Signed-off-by: Russell King --- diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 0603a6a53902..1043cb80235f 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -1162,4 +1162,15 @@ 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