linux-kernel - [PATCH] rtlwifi: btcoexist: avoid format string in printk

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Message-ID: <20140610173724.GA29543@www.outflux.net>
Date:	Tue, 10 Jun 2014 10:37:24 -0700
From:	Kees Cook <keescook@...omium.org>
To:	linux-kernel@...r.kernel.org
Cc:	Larry Finger <Larry.Finger@...inger.net>,
	Chaoming Li <chaoming_li@...lsil.com.cn>,
	"John W. Linville" <linville@...driver.com>,
	Kees Cook <keescook@...omium.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH] rtlwifi: btcoexist: avoid format string in printk

Since CL_PRINTF only ever takes a single argument, make sure a format
string cannot leak into printk.

Signed-off-by: Kees Cook <keescook@...omium.org>
---
 .../net/wireless/rtlwifi/btcoexist/halbtcoutsrc.h  |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/rtlwifi/btcoexist/halbtcoutsrc.h b/drivers/net/wireless/rtlwifi/btcoexist/halbtcoutsrc.h
index 871fc3c6d559..049f4c8d98a8 100644
--- a/drivers/net/wireless/rtlwifi/btcoexist/halbtcoutsrc.h
+++ b/drivers/net/wireless/rtlwifi/btcoexist/halbtcoutsrc.h
@@ -114,7 +114,7 @@ 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 {							\
-- 
1.7.9.5


-- 
Kees Cook
Chrome OS Security
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