linux-kernel - Re: ODEBUG: free active (active state 0) object type: work_struct hint: flush_to

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Date:	Wed, 10 Oct 2012 10:56:44 -0400
From:	Dave Jones <davej@...hat.com>
To:	Jiri Slaby <jslaby@...e.cz>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Jiri Slaby <jirislaby@...il.com>
Subject: Re: ODEBUG: free active (active state 0) object type: work_struct
 hint: flush_to_ldisc+0x0/0x1a0

On Wed, Oct 10, 2012 at 10:11:44AM +0200, Jiri Slaby wrote:
 > On 10/10/2012 06:26 AM, Dave Jones wrote:
 > > Just hit this..
 > 
 > That'd be me perhaps. Do you have some serial device connected? Or is it
 > a pure terminals + ptys?

There's a usb serial tty connected. other than that, just regular ptys.

 > Did you do something special? This very smells

Box had been running fuzz testing for ~9 hours.
Unfortunatly because of another bug that still isn't fixed, I can't narrow
down the window yet.

 > like tty_port is being freed while flushing work_struct is still active.

The fuzzer forks multiple processes, so this sounds feasible.

	Dave

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