linux-kernel - Re: [RFC][PATCHv3 1/6] printk: use vprintk

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20161018124905.1c1b6291@gandalf.local.home>
Date:   Tue, 18 Oct 2016 12:49:05 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Cc:     Petr Mladek <pmladek@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jan Kara <jack@...e.cz>, Tejun Heo <tj@...nel.org>,
        Calvin Owens <calvinowens@...com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-kernel@...r.kernel.org,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Subject: Re: [RFC][PATCHv3 1/6] printk: use vprintk_func in vprintk()

On Wed, 19 Oct 2016 00:40:40 +0900
Sergey Senozhatsky <sergey.senozhatsky@...il.com> wrote:

> vprintk(), just like printk(), better be using per-cpu printk_func
> instead of direct vprintk_emit() call. Just in case if vprintk()
> will ever be called from NMI, or from any other context that can
> deadlock in printk().
> 
> Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>

Reviewed-by: Steven Rostedt <rostedt@...dmis.org>

-- Steve

> ---
>  kernel/printk/printk.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
> index d5e3973..be7f60b 100644
> --- a/kernel/printk/printk.c
> +++ b/kernel/printk/printk.c
> @@ -1917,7 +1917,7 @@ EXPORT_SYMBOL(vprintk_emit);
>  
>  asmlinkage int vprintk(const char *fmt, va_list args)
>  {
> -	return vprintk_emit(0, LOGLEVEL_DEFAULT, NULL, 0, fmt, args);
> +	return vprintk_func(fmt, args);
>  }
>  EXPORT_SYMBOL(vprintk);
>