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arm: add DEBUG_SET_MODULE_RONX option to Kconfig

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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.

Change-Id: I8940410f8010ed7455deef59800a3f84bfab8b47
CRs-Fixed: 498398
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
This commit is contained in:
Laura Abbott 2013-06-12 09:50:22 -07:00 committed by Stephen Boyd
parent b9ba38fe58
commit b952b8b91f
1 changed files with 11 additions and 0 deletions
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11
arch/arm/Kconfig.debug
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@ -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