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Date: Wed, 30 Aug 2017 16:30:26 +0100
From: Al Viro <viro@ZenIV.linux.org.uk>
To: Christoph Hellwig <hch@lst.de>
Cc: arve@android.com, riandrews@android.com,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 02/16] autofs4: switch autofs4_write to __kernel_write
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On Wed, Aug 30, 2017 at 04:59:53PM +0200, Christoph Hellwig wrote:
> Instead of playing games with the address limit..

I wonder...  Do we verify that it's a pipe?  If so, ->f_pos can
(and should) be left alone...