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Date: Fri, 07 Feb 2014 09:54:57 +0800
From: Anand Jain <Anand.Jain@oracle.com>
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To: Thermionix <thermionix@gmail.com>
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Subject: Re: device delete missing panic
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 > ~ # mount -o degraded,recovery /pool 

 > Killed

> Feb 07 09:53:44 store03 kernel: BUG: unable to handle kernel NULL pointer dereference at 00000050
> Feb 07 09:53:44 store03 kernel: IP: [<f834b7b7>] btrfs_sysfs_add_one+0x1a7/0x280 [btrfs]

Mostly the above Bug is fixed in the patch below..

   [RFC PATCH] btrfs: fix null pointer deference at 
btrfs_sysfs_add_one+0x105

If you are hitting the same panic again, could you test it ?

Thanks, Anand