linux-kernel - Re: [PATCH v7] x86: Avoid pr_cont() in show

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Date:   Thu, 19 Jul 2018 16:11:20 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Cc:     mingo@...hat.com, mingo@...nel.org, linux-kernel@...r.kernel.org,
        joe@...ches.com, Rasmus Villemoes <linux@...musvillemoes.dk>,
        Andy Lutomirski <luto@...capital.net>,
        Borislav Petkov <bp@...e.de>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v7] x86: Avoid pr_cont() in show_opcodes().

On Thu, Jul 19, 2018 at 11:07:58PM +0900, Tetsuo Handa wrote:
> From: Rasmus Villemoes <linux@...musvillemoes.dk>
> 
> Since syzbot is confused by concurrent printk() messages [1],
> this patch changes show_opcodes() to use %ph format string.
> 
> When we start adding prefix to each line of printk() output,
> we will be able to handle concurrent printk() messages.
> 
> [1] https://syzkaller.appspot.com/text?tag=CrashReport&x=139d342c400000
> 
> Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
> Signed-off-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
> Cc: Borislav Petkov <bp@...e.de>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Josh Poimboeuf <jpoimboe@...hat.com>
> Cc: Linus Torvalds <torvalds@...ux-foundation.org>
> Cc: Andy Lutomirski <luto@...capital.net>

Thanks!

Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>