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Date:   Mon, 20 Jan 2020 20:46:50 +0100
From:   David Sterba <dsterba@suse.cz>
To:     Zygo Blaxell <ce3g8jdj@umail.furryterror.org>
Cc:     linux-btrfs@vger.kernel.org
Subject: Re: KASAN splat during mount on 5.4.5, no reproducer
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        Zygo Blaxell <ce3g8jdj@umail.furryterror.org>,
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References: <20191228200326.GD13306@hungrycats.org>
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On Sat, Dec 28, 2019 at 03:03:26PM -0500, Zygo Blaxell wrote:
> 
> [...etc...it dumps the same stacks again in the BUG]
> 
> The deepest level of fs/btrfs code is the list_del_init in
> clean_dirty_subvols.
> 
> After a reboot the next mount (and all subsequent mounts so far)
> was successful.  I don't have a reproducer.

For the record, this and other KASAN reports regarding reloc root, is
going to be fixed in 5.4.14, "btrfs: relocation: fix reloc_root lifespan
and access" (6282675e6708ec78). Thanks for the reports and debugging
help.