From: Jeff Vander Stoep <jeffv@google.com>
Date: Tue, 18 Aug 2015 18:15:53 +0000 (-0700)
Subject: arm64 Kconfig: Move LIST_POISON to a safe value
X-Git-Tag: firefly_0821_release~2958^2~122
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4003f6b715791eddb3eb429fb3787236403d320a;p=firefly-linux-kernel-4.4.55.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.

Change-Id: I558441a26a7c8390aa087f32c4cbe980de8c8ce3
Signed-off-by: Thierry Strudel <tstrudel@google.com>
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
---

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 871f21783866..a3a8ac304360 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -107,6 +107,10 @@ config MMU
 config NO_IOPORT_MAP
 	def_bool y if !PCI
 
+config ILLEGAL_POINTER_VALUE
+	hex
+	default 0xdead000000000000
+
 config STACKTRACE_SUPPORT
 	def_bool y