From: Vasily Kulikov <segoon@openwall.com>
Date: Wed, 21 Oct 2015 22:03:49 +0000 (+1100)
Subject: include/linux/poison.h: use POISON_POINTER_DELTA for poison pointers
X-Git-Tag: KARO-TX6UL-2015-11-03~14^2~69
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0077319e3e43196d5fe98e956c394d47b1024d03;p=karo-tx-linux.git

include/linux/poison.h: use POISON_POINTER_DELTA for poison pointers

TIMER_ENTRY_STATIC and TAIL_MAPPING are defined as poison pointers which
should point to nowhere.  Redefine them using POISON_POINTER_DELTA
arithmetics to make sure they really point to non-mappable area declared
by the target architecture.

Signed-off-by: Vasily Kulikov <segoon@openwall.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Solar Designer <solar@openwall.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/include/linux/poison.h b/include/linux/poison.h
index 76c3b6c38c16..4a27153574e2 100644
--- a/include/linux/poison.h
+++ b/include/linux/poison.h
@@ -27,14 +27,14 @@
  * Magic number "tsta" to indicate a static timer initializer
  * for the object debugging code.
  */
-#define TIMER_ENTRY_STATIC	((void *) 0x74737461)
+#define TIMER_ENTRY_STATIC	((void *) 0x300 + POISON_POINTER_DELTA)
 
 /********** mm/debug-pagealloc.c **********/
 #define PAGE_POISON 0xaa
 
 /********** mm/page_alloc.c ************/
 
-#define TAIL_MAPPING	((void *) 0x01014A11 + POISON_POINTER_DELTA)
+#define TAIL_MAPPING	((void *) 0x400 + POISON_POINTER_DELTA)
 
 /********** mm/slab.c **********/
 /*