From 3ad78bad4fd43467f1fc6dff63076789b30c116b Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Thu, 23 Jun 2016 15:24:05 -0700
Subject: mm: SLUB hardened usercopy support

Under CONFIG_HARDENED_USERCOPY, this adds object size checking to the
SLUB allocator to catch any copies that may span objects. Includes a
redzone handling fix discovered by Michael Ellerman.

Based on code from PaX and grsecurity.

Signed-off-by: Kees Cook <keescook@chromium.org>
Tested-by: Michael Ellerman <mpe@ellerman.id.au>
Reviwed-by: Laura Abbott <labbott@redhat.com>
(cherry picked from commit ed18adc1cdd00a5c55a20fbdaed4804660772281)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
---
 init/Kconfig | 1 +
 1 file changed, 1 insertion(+)

(limited to 'init/Kconfig')

diff --git a/init/Kconfig b/init/Kconfig
index fa031a140397..e1d1d6936f92 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1727,6 +1727,7 @@ config SLAB
 
 config SLUB
 	bool "SLUB (Unqueued Allocator)"
+	select HAVE_HARDENED_USERCOPY_ALLOCATOR
 	help
 	   SLUB is a slab allocator that minimizes cache line usage
 	   instead of managing queues of cached objects (SLAB approach).
-- 
cgit v1.2.3