Date: Tue, 11 Oct 2016 16:11:39 +0100
From: Al Viro <viro@ZenIV.linux.org.uk>
To: Dave Jones <davej@codemonkey.org.uk>, Chris Mason <clm@fb.com>,
        Josef Bacik <jbacik@fb.com>, David Sterba <dsterba@suse.com>,
        linux-btrfs@vger.kernel.org,
        Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: btrfs bio linked list corruption.
Message-ID: <20161011151139.GD19539@ZenIV.linux.org.uk>
References: <20161011144507.okg6baqvodn2m2lh@codemonkey.org.uk>
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On Tue, Oct 11, 2016 at 10:45:08AM -0400, Dave Jones wrote:
> This is from Linus' current tree, with Al's iovec fixups on top.

Those iovec fixups are in the current tree...  TBH, I don't see anything
in splice-related stuff that could come anywhere near that (short of
some general memory corruption having random effects of that sort).

Could you try to bisect that sucker, or is it too hard to reproduce?