From: Jeff Vander Stoep <jeffv@google.com>
Date: Tue, 18 Aug 2015 19:50:10 +0000 (+0100)
Subject: arm64: kconfig: Move LIST_POISON to a safe value
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=bf0c4e04732479f650ff59d1ee82de761c0071f0;p=linux-beck.git

arm64: kconfig: Move LIST_POISON to a safe value

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

Cc: <stable@vger.kernel.org>
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>
---

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 78b89fa337ee..f3d751a342f0 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -106,6 +106,10 @@ config NO_IOPORT_MAP
 config STACKTRACE_SUPPORT
 	def_bool y
 
+config ILLEGAL_POINTER_VALUE
+	hex
+	default 0xdead000000000000
+
 config LOCKDEP_SUPPORT
 	def_bool y