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Date:      Tue, 21 Aug 2018 13:15:04 +0000
From:      "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
To:        "Olivier =?utf-8?q?Cochard-Labb=C3=A9?=" <olivier@freebsd.org>
Cc:        "Marko Zec" <zec@fer.hr>, freebsd-current <freebsd-current@freebsd.org>
Subject:   Re: Loading carp module crash i386 (12-ALPHA2), seems VNET related
Message-ID:  <D948BD06-D627-4D9B-BFDA-AA1D077ECEFB@lists.zabbadoz.net>
In-Reply-To: <CA%2Bq%2BTcr=LXEQ1tzgycY5hhJ6X5CKvu2QgW1J-rvoGjsXyD=L8A@mail.gmail.com>
References:  <CA%2Bq%2BTcqN-YAXKQuZPQcrjmgABJJ22Pm%2B9-B9%2BZ8LH==0o%2Bg2BA@mail.gmail.com> <20180821113051.7d35bc39@x23> <CA%2Bq%2BTcr=LXEQ1tzgycY5hhJ6X5CKvu2QgW1J-rvoGjsXyD=L8A@mail.gmail.com>

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On 21 Aug 2018, at 12:31, Olivier Cochard-Labb=C3=A9 wrote:

> On Tue, Aug 21, 2018 at 11:29 AM Marko Zec <zec@fer.hr> wrote:
>
>> On Mon, 20 Aug 2018 16:26:29 +0200
>> Olivier Cochard-Labb=C3=A9 <olivier@freebsd.org> wrote:
>>
>>> Just loading carp kernel module is enough to panic it:
>>>
>>> [root@router]~# uname -a
>>> FreeBSD router.bsdrp.net 12.0-ALPHA2 FreeBSD 12.0-ALPHA2  r338100M
>>> i386 [root@router]~# kldload carp
>>> Fatal trap 12: page fault while in kernel mode
>>
>> How many vnets were already instantiated at the time of kldloading
>> carp?  Does the panic ocur with no (non-default) vnets instantiated?
>>
>>
> Hi,
>
> None VNET were instantiated: Just start the latest 12-i386 image (
> https://download.freebsd.org/ftp/snapshots/VM-IMAGES/12.0-CURRENT/i386/=
Latest/)
> on a VM, and once logged as root enter 'kldload carp' to trigger a =

> panic.

 From the backtrace it seems like VNET_PCPUSTAT_SYSINIT() or the kernel =

linker, or possible pcpu things.  People have recently been touching =

almost all of this :(

Do you have a last-good revision?

/bz



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