linux-kernel - Re: ce56a86e2a ("x86/mm: Limit mmap() of /dev/mem to valid physical addresses"): kernel BUG at arch/x86/mm/physaddr.c:79!

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Date:   Wed, 25 Oct 2017 16:50:48 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Craig Bergstrom <craigb@...gle.com>
Cc:     Fengguang Wu <fengguang.wu@...el.com>, wfg@...ux.intel.com,
        Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
        LKP <lkp@...org>, Sander Eikelenboom <linux@...elenboom.it>
Subject: Re: ce56a86e2a ("x86/mm: Limit mmap() of /dev/mem to valid physical
 addresses"): kernel BUG at arch/x86/mm/physaddr.c:79!

On 10/23/2017 10:44 PM, Fengguang Wu wrote:
> Greetings,
>
> 0day kernel testing robot got the below dmesg and the first bad commit is
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>
> commit ce56a86e2ade45d052b3228cdfebe913a1ae7381
> Author:     Craig Bergstrom <craigb@...gle.com>
> AuthorDate: Thu Oct 19 13:28:56 2017 -0600
> Commit:     Ingo Molnar <mingo@...nel.org>
> CommitDate: Fri Oct 20 09:48:00 2017 +0200
>
>      x86/mm: Limit mmap() of /dev/mem to valid physical addresses

Also note
https://lists.xenproject.org/archives/html/xen-devel/2017-10/msg02935.html

-boris