Kernel panic on boot at dm_crypt

[Sepherosa Ziehau]

On Thu, Jul 7, 2016 at 10:57 AM, Sepherosa Ziehau <sepherosa at gmail.com> wrote:
> On Wed, Jul 6, 2016 at 5:54 AM, Stefan Unterweger
> <232.20711 at chiffre.aleturo.com> wrote:
>> Yet another problem on the same virtualised host as in the other thread
>> a few weeks back.
>>
>> As before, this is a presumably KVM virtualised host.  With the
>> exception of a small boot partition, all storage volumes are encrypted
>> via cryptsetup‘s LUKS mode.
>>
>> It looks like a race condition of some weird sort, and there’s no doubt
>> that the virtualisation is again playing tricks with me.  If I type in
>> the password incorrectly, then it will most likely crash violently right
>> there.  If typed in correctly, then in one of five it -might- boot.  The
>> kernel panic is attached below.
>
> It looks like a race between the dm init and the I/O path.  i.e. the
> read happens even before the dm init is completed.  Not sure about
> why...

Try this patch:
https://leaf.dragonflybsd.org/~sephe/dfly_dm_order.diff

Thanks,
sephe

-- 
Tomorrow Will Never Die