linux-kernel - [PATCH v2] arm64 Kconfig: Move LIST

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Message-Id: <1439927410-15522-1-git-send-email-jeffv@google.com>
Date:	Tue, 18 Aug 2015 12:50:10 -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 v2] 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: Thierry Strudel <tstrudel@...gle.com>
Signed-off-by: Jeff Vander Stoep <jeffv@...gle.com>
---
v2 removes an extra newline.

 arch/arm64/Kconfig | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 318175f..8f1789c 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -104,6 +104,10 @@ config NO_IOPORT_MAP
 config STACKTRACE_SUPPORT
 	def_bool y
 
+config ILLEGAL_POINTER_VALUE
+	hex
+	default 0xdead000000000000
+
 config LOCKDEP_SUPPORT
 	def_bool y
 
-- 
2.5.0.276.gf5e568e

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