linux-kernel - Re: KASAN vs. boot-time switching between 4- and 5-level paging

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Message-ID: <20170710212403.7ycczkhhki3vrgac@node.shutemov.name>
Date:   Tue, 11 Jul 2017 00:24:04 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     Dmitry Vyukov <dvyukov@...gle.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "x86@...nel.org" <x86@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Andi Kleen <ak@...ux.intel.com>,
        Dave Hansen <dave.hansen@...el.com>,
        linux-arch <linux-arch@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        kasan-dev <kasan-dev@...glegroups.com>
Subject: Re: KASAN vs. boot-time switching between 4- and 5-level paging

On Mon, Jul 10, 2017 at 01:07:13PM -0700, Andy Lutomirski wrote:
> Can you give the disassembly of the backtrace lines?  Blaming the
> .endr doesn't make much sense to me.

I don't have backtrace. It's before printk() is functional. I only see
triple fault and reboot.

I had to rely on qemu tracing and gdb.

-- 
 Kirill A. Shutemov