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authorAndrey Ryabinin <a.ryabinin@samsung.com>2015-02-14 01:39:28 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-14 08:21:41 +0300
commitb8c73fc2493d42517be95cf2c89659fc6c6f4d02 (patch)
tree81e44f58a903a8093617f5db7806f0bfa4cf5691 /mm/kasan/kasan.h
parentef7f0d6a6ca8c9e4b27d78895af86c2fbfaeedb2 (diff)
downloadlinux-b8c73fc2493d42517be95cf2c89659fc6c6f4d02.tar.xz
mm: page_alloc: add kasan hooks on alloc and free paths
Add kernel address sanitizer hooks to mark allocated page's addresses as accessible in corresponding shadow region. Mark freed pages as inaccessible. Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Konstantin Serebryany <kcc@google.com> Cc: Dmitry Chernenkov <dmitryc@google.com> Signed-off-by: Andrey Konovalov <adech.fo@gmail.com> Cc: Yuri Gribov <tetra2005@gmail.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: Christoph Lameter <cl@linux.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/kasan/kasan.h')
-rw-r--r--mm/kasan/kasan.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index 648b9c006f3f..d3c90d5dd97a 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h
@@ -6,6 +6,8 @@
#define KASAN_SHADOW_SCALE_SIZE (1UL << KASAN_SHADOW_SCALE_SHIFT)
#define KASAN_SHADOW_MASK (KASAN_SHADOW_SCALE_SIZE - 1)
+#define KASAN_FREE_PAGE 0xFF /* page was freed */
+
struct kasan_access_info {
const void *access_addr;
const void *first_bad_addr;