linux-kernel - Re: [PATCH 0/2] printk: replace ringbuffer

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Message-ID: <20200205063640.GJ41358@google.com>
Date:   Wed, 5 Feb 2020 15:36:40 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     lijiang <lijiang@...hat.com>,
        John Ogness <john.ogness@...utronix.de>
Cc:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Petr Mladek <pmladek@...e.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrea Parri <parri.andrea@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        kexec@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] printk: replace ringbuffer

On (20/02/05 13:38), lijiang wrote:
> > On (20/02/05 13:48), Sergey Senozhatsky wrote:
> >> On (20/02/05 12:25), lijiang wrote:

[..]

> >>
> >> So there is a General protection fault. That's the type of a problem that
> >> kills the boot for me as well (different backtrace, tho).
> > 
> > Do you have CONFIG_RELOCATABLE and CONFIG_RANDOMIZE_BASE (KASLR) enabled?
> > 
> 
> Yes. These two options are enabled.
> 
> CONFIG_RELOCATABLE=y
> CONFIG_RANDOMIZE_BASE=y

So KASLR kills the boot for me. So does KASAN.

John, do you see any of these problems on your test machine?

	-ss