]> git.baikalelectronics.ru Git - kernel.git/commit
x86_64: kasan: add interceptors for memset/memmove/memcpy functions
authorAndrey Ryabinin <a.ryabinin@samsung.com>
Fri, 13 Feb 2015 22:39:56 +0000 (14:39 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sat, 14 Feb 2015 05:21:41 +0000 (21:21 -0800)
commit74ea02098be85d73d4fb214718400d9ca451b791
treee78e96b38ecd36eec62325cc2cc21e8d79397bc1
parent1d065adb545db9d68443bd93af3ac93d24f61555
x86_64: kasan: add interceptors for memset/memmove/memcpy functions

Recently instrumentation of builtin functions calls was removed from GCC
5.0.  To check the memory accessed by such functions, userspace asan
always uses interceptors for them.

So now we should do this as well.  This patch declares
memset/memmove/memcpy as weak symbols.  In mm/kasan/kasan.c we have our
own implementation of those functions which checks memory before accessing
it.

Default memset/memmove/memcpy now now always have aliases with '__'
prefix.  For files that built without kasan instrumentation (e.g.
mm/slub.c) original mem* replaced (via #define) with prefixed variants,
cause we don't want to check memory accesses there.

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>
arch/x86/boot/compressed/eboot.c
arch/x86/boot/compressed/misc.h
arch/x86/include/asm/string_64.h
arch/x86/kernel/x8664_ksyms_64.c
arch/x86/lib/memcpy_64.S
arch/x86/lib/memmove_64.S
arch/x86/lib/memset_64.S
drivers/firmware/efi/libstub/efistub.h
mm/kasan/kasan.c