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authorVasily Kulikov <segoon@openwall.com>2016-01-15 16:57:55 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-16 11:17:22 -0800
commitb8a0255db958b8f70c5267dda152e93b6fda1778 (patch)
tree3c37c21b3a4a2be86df8e87731e563c0bdbedda4
parent6611d8d76132f86faa501de9451a89bf23fb2371 (diff)
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> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/poison.h4
1 files changed, 2 insertions, 2 deletions
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 **********/
/*