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Date:	Thu, 10 Jul 2014 13:16:11 -0700
From:	Kees Cook <>
To:	Greg Kroah-Hartman <>
	"John W. Linville" <>
Subject: [PATCH] staging: r8821ae: avoid leaking format string

This make sure a format string cannot leak into the work queue name nor
the printk buffer.

Signed-off-by: Kees Cook <>
This is the third time this set of macros has entered the kernel:


Can we extract these macros to some common place and keep them from returning?
 drivers/staging/rtl8821ae/btcoexist/halbtcoutsrc.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/rtl8821ae/btcoexist/halbtcoutsrc.h b/drivers/staging/rtl8821ae/btcoexist/halbtcoutsrc.h
index 787798e76217..fd233cc85a5b 100644
--- a/drivers/staging/rtl8821ae/btcoexist/halbtcoutsrc.h
+++ b/drivers/staging/rtl8821ae/btcoexist/halbtcoutsrc.h
@@ -88,7 +88,7 @@ extern u32 btc_dbg_type[];
 #define	CL_SPRINTF	snprintf
-#define	CL_PRINTF	printk
+#define	CL_PRINTF(buf)	printk("%s", buf)
 #define	BTC_PRINT(dbgtype, dbgflag, printstr, ...)		\
 	do { 							\

Kees Cook
Chrome OS Security
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