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Re: lockdep warning when logging in with ssh

To: Prarit Bhargava <prarit@xxxxxxxxxx>
Subject: Re: lockdep warning when logging in with ssh
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Thu, 11 Sep 2014 06:23:48 +1000
Cc: xfs@xxxxxxxxxxx, Eric Sandeen <esandeen@xxxxxxxxxx>
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <54109F93.9020206@xxxxxxxxxx>
References: <54109F93.9020206@xxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Wed, Sep 10, 2014 at 02:59:31PM -0400, Prarit Bhargava wrote:
> I see this when I attempt to login via ssh.  I do not see it if I login on
> the serial console.  I recall seeing it earlier when chasing another patch but
> cannot recall the kernel version.

It's the shmem code that is broken - instantiating an inode while
holding the mmap_sem inverts lock orders all over the place,
especially in the security subsystem....


Dave Chinner

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