netdev - Re: shutdown(3) and bluetooth.

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Message-Id: <DF4C2B40-BD87-4E88-911D-E3E5F488CAE4@holtmann.org>
Date:	Wed, 13 Nov 2013 06:56:23 +0900
From:	Marcel Holtmann <marcel@...tmann.org>
To:	Dave Jones <davej@...hat.com>
Cc:	netdev@...r.kernel.org,
	"linux-bluetooth@...r.kernel.org development" 
	<linux-bluetooth@...r.kernel.org>
Subject: Re: shutdown(3) and bluetooth.

Hi Dave,

> 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.

can you give us some extra information here. What kind of Bluetooth socket is this actually. From the top of my head, I have no idea why we would even wait forever. Normally when all low-level links are gone, the socket will shut down anyway.

Regards

Marcel

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