netdev - Re: shutdown(3) and bluetooth.

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Message-ID: <20131113140239.GA2154@tuxdriver.com>
Date:	Wed, 13 Nov 2013 09:02:40 -0500
From:	"John W. Linville" <linville@...driver.com>
To:	David Miller <davem@...emloft.net>
Cc:	davej@...hat.com, netdev@...r.kernel.org,
	linux-bluetooth@...r.kernel.org, linux-wireless@...r.kernel.org
Subject: Re: shutdown(3) and bluetooth.

On Tue, Nov 12, 2013 at 04:13:50PM -0500, David Miller wrote:
> From: Dave Jones <davej@...hat.com>
> Date: Tue, 12 Nov 2013 16:11:25 -0500
> 
> > Is shutdown() allowed to block indefinitely ? The man page doesn't say either way,
> > and I've noticed that my fuzz tester occasionally hangs for days spinning in bt_sock_wait_state()
> > 
> > Is there something I should be doing to guarantee that this operation
> > will either time out, or return instantly ?
> > 
> > In this specific case, I doubt anything is on the "sender" end of the socket, so
> > it's going to be waiting forever for a state change that won't arrive.
> 
> Adding bluetooth and wireless lists.  Dave, please consult MAINTAINERS when
> asking questions like this, thanks!

I don't have an authoritative answer.  I do, however, seem to recall
that trying to shutdown a SunOS box with a hung NFS mount would seem
to hang forever.  I don't think that is a great metric for how we
should behave, of course...

John
-- 
John W. Linville		Someday the world will need a hero, and you
linville@...driver.com			might be all we have.  Be ready.
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