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authorRussell King <rmk+kernel@arm.linux.org.uk>2013-07-04 11:40:32 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-08-11 18:35:20 -0700
commitb85796fa1987e014a61c379e3cb753976e993a46 (patch)
treef80f85350b34fe91c2b67b31e86e497e4bf16b3f /arch/arm/Kconfig
parentddc8d5e58a818e543ac658a572b3155c8ea3e45d (diff)
downloadlinaro-lsk-b85796fa1987e014a61c379e3cb753976e993a46.tar.gz
ARM: move vector stubs
commit 19accfd373847ac3d10623c5d20f948846299741 upstream. Move the machine vector stubs into the page above the vector page, which we can prevent from being visible to userspace. Also move the reset stub, and place the swi vector at a location that the 'ldr' can get to it. This hides pointers into the kernel which could give valuable information to attackers, and reduces the number of exploitable instructions at a fixed address. Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm/Kconfig')
-rw-r--r--arch/arm/Kconfig3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 136f263ed47..d2e1f71cc19 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -213,7 +213,8 @@ config VECTORS_BASE
default DRAM_BASE if REMAP_VECTORS_TO_RAM
default 0x00000000
help
- The base address of exception vectors.
+ The base address of exception vectors. This must be two pages
+ in size.
config ARM_PATCH_PHYS_VIRT
bool "Patch physical to virtual translations at runtime" if EMBEDDED