Subject: Re: [RESEND][PATCH] rtlwifi: btcoexist: avoid format string in printk

From: "John W. Linville" <[email-masked]>
Date: Tue, 1 Jul 2014 14:29:08 -0400

Please look in the git trees before reposting patches...

commit 6437f51ec36af8ef1e3e2659439b35c37e5498e2
Author: Kees Cook <[email-masked]>
Date:   Tue Jun 10 10:37:24 2014 -0700

    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 <[email-masked]>
    Signed-off-by: John W. Linville <[email-masked]>

On Mon, Jun 30, 2014 at 01:38:49PM -0700, Kees Cook wrote:
> Since CL_PRINTF only ever takes a single argument, make sure a format
> string cannot leak into printk.
> 
> Signed-off-by: Kees Cook <[email-masked]>
> ---
>  .../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
> 

-- 
John W. Linville		Someday the world will need a hero, and you
[email-masked]			might be all we have.  Be ready.