linux-kernel - [PATCH] arm64 Kconfig: Move LIST

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Message-Id: <1439926177-13839-1-git-send-email-jeffv@google.com>
Date:	Tue, 18 Aug 2015 12:29:37 -0700
From:	Jeff Vander Stoep <jeffv@...gle.com>
To:	catalin.marinas@....com
Cc:	rmk@....linux.org.uk, will.deacon@....com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	nnk@...gle.com, tstrudel@...gle.com,
	Jeff Vander Stoep <jeffv@...gle.com>
Subject: [PATCH] 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.

Signed-off-by: Jeff Vander Stoep <jeffv@...gle.com>
---
 arch/arm64/Kconfig | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 9532f8d..c003911 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -91,6 +91,11 @@ config NO_IOPORT_MAP
 config STACKTRACE_SUPPORT
 	def_bool y
 
+config ILLEGAL_POINTER_VALUE
+	hex
+	default 0xdead000000000000
+
+
 config LOCKDEP_SUPPORT
 	def_bool y
 
-- 
2.5.0.rc2.392.g76e840b

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