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Subject[PATCH 3.12 38/84] arm64: kconfig: Move LIST_POISON to a safe value
Date
From: Jeff Vander Stoep <jeffv@google.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit bf0c4e04732479f650ff59d1ee82de761c0071f0 upstream.

Move the poison pointer offset to 0xdead000000000000, a
recognized value that is not mappable by user-space exploits.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Thierry Strudel <tstrudel@google.com>
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
arch/arm64/Kconfig | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index fe70eaea0e28..b07f9f356b87 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -56,6 +56,10 @@ config NO_IOPORT
config STACKTRACE_SUPPORT
def_bool y

+config ILLEGAL_POINTER_VALUE
+ hex
+ default 0xdead000000000000
+
config LOCKDEP_SUPPORT
def_bool y

--
2.6.0


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