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authorLaura Abbott <lauraa@codeaurora.org>2014-08-19 20:41:43 +0100
committerWill Deacon <will.deacon@arm.com>2014-09-08 14:39:18 +0100
commit11d91a770f1fff44dafdf88d6089a3451f99c9b6 (patch)
treedb7874516b61d7df4d85e4529b9ea6e1033624e6 /arch/arm64/Kconfig.debug
parentarm64: Introduce {set,clear}_pte_bit (diff)
downloadlinux-dev-11d91a770f1fff44dafdf88d6089a3451f99c9b6.tar.xz
linux-dev-11d91a770f1fff44dafdf88d6089a3451f99c9b6.zip
arm64: Add CONFIG_DEBUG_SET_MODULE_RONX support
In a similar fashion to other architecture, add the infrastructure and Kconfig to enable DEBUG_SET_MODULE_RONX support. When enabled, module ranges will be marked read-only/no-execute as appropriate. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> [will: fixed off-by-one in module end check] Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig.debug')
-rw-r--r--arch/arm64/Kconfig.debug11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug
index 4ee8e90b7a45..0a12933e50ed 100644
--- a/arch/arm64/Kconfig.debug
+++ b/arch/arm64/Kconfig.debug
@@ -43,4 +43,15 @@ config ARM64_RANDOMIZE_TEXT_OFFSET
of TEXT_OFFSET and platforms must not require a specific
value.
+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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