netdev - Re: possible circular locking dependency detected

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Message-ID: <CA+55aFz-TaU=C47Rna4b_pibKPfabXWtt88gaqWkUdcN9ay9nQ@mail.gmail.com>
Date:   Fri, 2 Sep 2016 10:12:08 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     Rainer Weikusat <rweikusat@...eradapt.com>,
        CAI Qian <caiqian@...hat.com>,
        Miklos Szeredi <miklos@...redi.hu>,
        Hannes Frederic Sowa <hannes@...essinduktion.org>,
        Rainer Weikusat <rweikusat@...ileactivedefense.com>,
        Eric Sandeen <esandeen@...hat.com>,
        Network Development <netdev@...r.kernel.org>
Subject: Re: possible circular locking dependency detected

On Fri, Sep 2, 2016 at 10:02 AM, Al Viro <viro@...iv.linux.org.uk> wrote:
>
> It's very much _not_ just overlayfs being pathological - that it certainly is,
> but the problem is much wider.

Al, can you take a look at my two patches, and see if you agree that
they fix it, though?

Of course, we now have *another* splice deadlock. That pipe inode is
nasty, it's very easy to deadlock on it in subtle ways.

             Linus