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From: Nix <nix@esperi.org.uk>
To: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: "Bruno Prémont" <bonbons@linux-vserver.org>,
	"J. Bruce Fields" <bfields@fieldses.org>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"Linux NFS Mailing List" <linux-nfs@vger.kernel.org>
Subject: Re: [Patch] sunrpc: NULL utsname dereference on NFS umount during namespace cleanup
Date: Sat, 31 Jan 2015 00:44:18 +0000	[thread overview]
Message-ID: <87zj8z7p99.fsf@spindle.srvr.nix> (raw)
In-Reply-To: <1422661761.21259.5.camel@primarydata.com> (Trond Myklebust's message of "Fri, 30 Jan 2015 18:49:21 -0500")

On 30 Jan 2015, Trond Myklebust uttered the following:

> On Sun, 2015-01-25 at 16:55 -0500, Trond Myklebust wrote:
>> On Sun, Jan 25, 2015 at 4:06 PM, Bruno Prémont
>> <bonbons@linux-vserver.org> wrote:
>> > On a system running home-brown container (mntns, utsns, pidns, netns)
>> > with NFS mount-point bind-mounted into the container I hit the following
>> > trace if nfs filesystem is first umount()ed in init ns and then later
>> > umounted from container when the container exists.

I'm not using containers, but I *am* extensively bind-mounting
NFS filesystems, which probably has the same net effect.

> I was rather hoping that Bruno would fix up his patch and resend, but
> since other reports of the same bug are now surfacing... Please could
> you all check if something like the following patch fixes it.

I have to wait for another of those xprt != 0 warnings, I think. I've
had a couple of clean reboots, but I had the occasional clean reboot
even before this patch.

I'll let it run overnight and give it a reboot in the morning.

-- 
NULL && (void)

  reply	other threads:[~2015-01-31  0:44 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-25 21:06 Bruno Prémont
2015-01-25 21:55 ` Trond Myklebust
2015-01-30 23:49   ` Trond Myklebust
2015-01-31  0:44     ` Nix [this message]
2015-02-02 17:41       ` Nix
2015-02-02 22:54         ` Trond Myklebust
2015-02-03  0:20           ` Nix
2015-01-31  9:02     ` Bruno Prémont
2015-02-04 17:08     ` Bruno Prémont
2015-02-04 19:06       ` Trond Myklebust
2015-02-04 21:52         ` Bruno Prémont
2015-02-04 22:29           ` Trond Myklebust

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