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authorLaura Abbott <lauraa@codeaurora.org>2013-06-17 10:29:14 -0700
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-12-11 09:53:21 +0000
commitdca9aa92fc7caa3620b31ced1535968f4aeeb967 (patch)
tree8bc531d582eae3546658dcf9cabf1394523cdd6c /arch/arm/Kconfig.debug
parent75374ad47c6465de6c098d7b913fe02d6131195c (diff)
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op-kernel-dev-dca9aa92fc7caa3620b31ced1535968f4aeeb967.tar.gz
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 <lauraa@codeaurora.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/Kconfig.debug')
-rw-r--r--arch/arm/Kconfig.debug11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 0603a6a5..1043cb8 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".
+
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