Re: kern/44652: 'gpt destroy' panics

[Christoph Egger <Christoph_Egger%gmx.de@localhost>]

On 03/02/11 11:45, Hauke Fath wrote:
> The following reply was made to PR kern/44652; it has been noted by GNATS.
>
> From: Hauke Fath<hf%spg.tu-darmstadt.de@localhost>
> To: gnats-bugs%NetBSD.org@localhost
> Cc: kern-bug-people%NetBSD.org@localhost
> Subject: Re: kern/44652: 'gpt destroy' panics
> Date: Wed, 2 Mar 2011 11:41:57 +0100
>
>   At 10:00 Uhr +0000 01.03.2011, Hauke Fath wrote:
>   >  I deconstructed wedges and gpts of the above installation in the right
>   >  sequence, dd(1)ed the beginning of the disk, and ten seconds or so later
>   >  was hit with
>   >  
> <http://la.causeuse.org/hauke/NetBSD/gpt-issues/gpt_destroy_raid_panic.jpg>.
>
>   And another one
>
>   <http://la.causeuse.org/hauke/NetBSD/gpt-issues/gpt_raidframe_panic.jpg>
>
>   which I got while deconstructing wedges and partitions out of order. As
>   Christoph pointed out, another null pointer issue; not sc though, which is
>   checked in the caller dkstrategy().

This time the crash happens in sys/dev/dkwedge/dk.c, line 1200:

      nbp->b_dev = sc->sc_parent->dk_rawvp->v_rdev;

dk_rawvp is NULL.

Christoph

>   {Con, DE}structing the gpt setup was done with the scripts at
>
>   <http://la.causeuse.org/hauke/NetBSD/gpt-issues/mk_gpt.sh>
>   <http://la.causeuse.org/hauke/NetBSD/gpt-issues/rm_gpt.sh>
>
>   with 'env testing=1 sh rm_gpt.sh' making a mess.