[PATCH 3.16.y-ckt 051/133] arm64: kconfig: Move LIST_POISON to a safe value
Luis Henriques
luis.henriques at canonical.com
Wed Sep 30 09:49:59 UTC 2015
3.16.7-ckt18 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Jeff Vander Stoep <jeffv at google.com>
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 at arm.com>
Signed-off-by: Thierry Strudel <tstrudel at google.com>
Signed-off-by: Jeff Vander Stoep <jeffv at google.com>
Signed-off-by: Will Deacon <will.deacon at arm.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
arch/arm64/Kconfig | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 839f48c26ef0..316ed8cf5bc0 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -81,6 +81,10 @@ config NO_IOPORT_MAP
config STACKTRACE_SUPPORT
def_bool y
+config ILLEGAL_POINTER_VALUE
+ hex
+ default 0xdead000000000000
+
config LOCKDEP_SUPPORT
def_bool y
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