linux-kernel - [PATCH 1/3] lkdtm: Include WARN format string

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Date:   Tue,  7 Nov 2017 16:27:47 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Kees Cook <keescook@...omium.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Joe Perches <joe@...ches.com>,
        Fengguang Wu <fengguang.wu@...el.com>,
        Arnd Bergmann <arnd@...db.de>, linux-am33-list@...hat.com,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: [PATCH 1/3] lkdtm: Include WARN format string

In order to test the ordering of WARN format strings, actually include one
in LKDTM.

Signed-off-by: Kees Cook <keescook@...omium.org>
---
 drivers/misc/lkdtm_bugs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/lkdtm_bugs.c b/drivers/misc/lkdtm_bugs.c
index 9e0b4f959987..8523f7dbac99 100644
--- a/drivers/misc/lkdtm_bugs.c
+++ b/drivers/misc/lkdtm_bugs.c
@@ -62,9 +62,11 @@ void lkdtm_BUG(void)
 	BUG();
 }
 
+static int warn_counter;
+
 void lkdtm_WARNING(void)
 {
-	WARN_ON(1);
+	WARN(1, "Warning message trigger count: %d\n", warn_counter++);
 }
 
 void lkdtm_EXCEPTION(void)
-- 
2.7.4