linux-kernel - Re: NFS/d_splice

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Message-Id: <69B23CC3-E14B-44BA-9067-6AEC124F6461@linuxhacker.ru>
Date:	Mon, 20 Jun 2016 11:45:50 -0400
From:	Oleg Drokin <green@...uxhacker.ru>
To:	Anna Schumaker <Anna.Schumaker@...app.com>
Cc:	Al Viro <viro@...IV.linux.org.uk>,
	Trond Myklebust <trond.myklebust@...marydata.com>,
	"J. Bruce Fields" <bfields@...hat.com>,
	<linux-nfs@...r.kernel.org>,
	"<linux-kernel@...r.kernel.org> Mailing List" 
	<linux-kernel@...r.kernel.org>,
	"<linux-fsdevel@...r.kernel.org>" <linux-fsdevel@...r.kernel.org>
Subject: Re: NFS/d_splice_alias breakage


On Jun 20, 2016, at 11:43 AM, Anna Schumaker wrote:

> Hi,
> 
> On 06/20/2016 10:08 AM, Al Viro wrote:
>> On Mon, Jun 20, 2016 at 09:25:12AM -0400, Oleg Drokin wrote:
>>> It looks like this patch was totally forgotten?
>>> I don't see it in neither vfs nor nfs trees and yet it fixes a very easy to cause
>>> crash in nfs code. And I think it's unrelated to the other parallel case too.
>> 
>> I assumed it would go through NFS tree, seeing that it's NFS-specific and
>> has nothing to do with any of the recent VFS changes (oops is triggerable
>> starting from 3.11); I can certainly put it through vfs.git, and there
>> will be changes nearby, but this one should go into -stable as a separate
>> patch.
> 
> I was going to put together an nfs bugfixes pull request for 4.7 this week, so I can include the patch there if this is easy to hit.

Yes, it is very easy to hit.