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Commit 4ea14115 authored by Patrick Daly's avatar Patrick Daly
Browse files

kasan: Kconfig: Add KASAN_SANITIZE_ALL 



Allow enabling KASAN on a per-directory or per-file basis rather than
for the entire kernel.

Change-Id: I9a491d3ab0df4c42302a258b9edb3b78cf4e1db0
Signed-off-by: default avatarPatrick Daly <pdaly@codeaurora.org>
parent c952020e

lib/Kconfig.kasan

+18 −0
Original line number Diff line number Diff line
@@ -17,6 +17,8 @@ config KASAN 
	  ~x3 performance slowdown.

	  For better error detection enable CONFIG_STACKTRACE,

	  and add slub_debug=U to boot cmdline.

	  See KASAN_SANITIZE_ALL for selectively compiling files and directories

	  with this compiler feature enabled.



config KASAN_SHADOW_OFFSET

	hex
@@ -47,6 +49,22 @@ config KASAN_INLINE 


endchoice



config KASAN_SANITIZE_ALL

	bool "KASan: Enable Instrumentation for entire kernel"

	depends on KASAN

	default y

	help

	  Enable compilation with $(CFLAGS_KASAN) by default.

	  KASAN_SANITIZE := n - exclude all files in a directory

	  KASAN_SANITIZE_file_name.o := n - exclude a single file

	  Setting KASAN_SANITIZE_ALL to 'n' allows enabling kasan in

	  only certain files or directories.

	  KASAN_SANITIZE := y - include all files in a directory

	  KASAN_SANITIZE_file_name.o := y - include single file



	  KASAN_SANITIZE does not affect subdirectories.

	  KASAN_SANITIZE_file_name.o has priority over KASAN_SANITIZE.



config TEST_KASAN

	tristate "Module for testing kasan for bug detection"

	depends on m && KASAN

scripts/Makefile.lib

+1 −1
Original line number Diff line number Diff line
@@ -125,7 +125,7 @@ endif 
#

ifeq ($(CONFIG_KASAN),y)

_c_flags += $(if $(patsubst n%,, \

		$(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \

		$(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)$(CONFIG_KASAN_SANITIZE_ALL)), \

		$(CFLAGS_KASAN))

endif