lib-vsprintf-default-kptr_restrict-to-the-maximum-value.patch

From: Dave Weinstein <olorin@google.com>
Date: Wed, 11 Jan 2017 16:27:59 -0800
Subject: lib: vsprintf: default kptr_restrict to the maximum value

Set the initial value of kptr_restrict to the maximum
setting rather than the minimum setting, to ensure that
early boot logging is not leaking information.

Signed-off-by: Dave Weinstein <olorin@google.com>
---

---
 lib/vsprintf.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -395,7 +395,7 @@ struct printf_spec {
 #define FIELD_WIDTH_MAX ((1 << 23) - 1)
 #define PRECISION_MAX ((1 << 15) - 1)
 
-int kptr_restrict __read_mostly;
+int kptr_restrict __read_mostly = 4;
 
 /*
  * Always cleanse %p and %pK specifiers