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Date: Fri, 1 Sep 2017 12:22:48 +0200
From: Christoph Hellwig <hch@lst.de>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>, arve@android.com,
        riandrews@android.com, linux-fsdevel@vger.kernel.org,
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Subject: Re: [PATCH 02/16] autofs4: switch autofs4_write to __kernel_write
Message-ID: <20170901102248.GB25178@lst.de>
References: <20170830150007.3953-1-hch@lst.de> <20170830150007.3953-3-hch@lst.de> <20170830153026.GM5426@ZenIV.linux.org.uk>
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On Wed, Aug 30, 2017 at 04:30:26PM +0100, Al Viro wrote:
> 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...

currently nothing in autofs_dev_ioctl_setpipefd verifies that
it's a pipe.