[PATCHv2 3/3] arm: add DEBUG_SET_MODULE_RONX option to Kconfig
lauraa at codeaurora.org
Mon Jun 17 13:29:14 EDT 2013
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 at codeaurora.org>
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
@@ -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.
+ bool "Set loadable kernel module data as NX and text as RO"
+ depends on MODULES
+ 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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