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Date: Wed, 29 Aug 2012 10:35:01 -0400
From: Josef Bacik <jbacik@fusionio.com>
To: Marc MERLIN <marc@merlins.org>
CC: linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: BUG: unable to handle kernel NULL pointer
 rcu_string_strdup.constprop.63+0x14/0x48
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References: <20120824174233.GB18380@merlins.org>
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On Fri, Aug 24, 2012 at 11:42:33AM -0600, Marc MERLIN wrote:
> With 3.5.2, I created 5 dm-crypted devices from 5 drives.
> I created a raid0 btrfs filesystem and wrote stuff to it.
> One drive died.
> 

I fixed this in btrfs-next, please build that and verify it fixes your problem.
Thanks,

Josef