From 9e84af76a8c3c1022fe2f782cb2245bbd39fe197 Mon Sep 17 00:00:00 2001
From: Daniel Micay <danielmicay@gmail.com>
Date: Wed, 24 Jan 2018 23:54:08 -0500
Subject: [PATCH] wire up -fsanitize=local-init

---
 Makefile     | 4 ++++
 init/Kconfig | 6 ++++++
 2 files changed, 10 insertions(+)

diff --git a/Makefile b/Makefile
index c8b8e902d5a4f..c05aa678014cf 100644
--- a/Makefile
+++ b/Makefile
@@ -674,6 +674,10 @@ ifneq ($(CONFIG_FRAME_WARN),0)
 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
 endif
 
+ifdef CONFIG_LOCAL_SANITIZE
+KBUILD_CFLAGS   += -fsanitize=local-sanitize
+endif
+
 # This selects the stack protector compiler flag. Testing it is delayed
 # until after .config has been reprocessed, in the prepare-compiler-check
 # target.
diff --git a/init/Kconfig b/init/Kconfig
index f3bc2f21c394d..585ec832277da 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1039,6 +1039,12 @@ config CC_OPTIMIZE_FOR_SIZE
 
 endchoice
 
+config LOCAL_SANITIZE
+	bool "Zero uninitialized locals"
+	help
+	  Zero-fill uninitialized local variables, other than variable-length
+	  arrays. Requires compiler support.
+
 config SYSCTL
 	bool