Re: [PATCH v2 11/11] mm: SLUB hardened usercopy support
From: Balbir Singh <bsingharora@gmail.com>
Date: 2016-07-15 02:06:17
Also in:
linux-arm-kernel, linux-mm, linuxppc-dev, lkml, sparclinux
On Wed, Jul 13, 2016 at 02:56:04PM -0700, Kees Cook wrote:
quoted hunk ↗ jump to hunk
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 from Michael Ellerman. Based on code from PaX and grsecurity. Signed-off-by: Kees Cook <redacted> --- init/Kconfig | 1 + mm/slub.c | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 37 insertions(+)diff --git a/init/Kconfig b/init/Kconfig index 798c2020ee7c..1c4711819dfd 100644 --- a/init/Kconfig +++ b/init/Kconfig@@ -1765,6 +1765,7 @@ config SLAB config SLUB bool "SLUB (Unqueued Allocator)" + select HAVE_HARDENED_USERCOPY_ALLOCATOR
Should this patch come in earlier from a build perspective? I think patch 1 introduces and uses __check_heap_object. Balbir Singh. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>