linux-kernel - Re: [tty bug] kernel BUG at drivers/char/tty

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Message-ID: <20090113122338.13a155a0@lxorguk.ukuu.org.uk>
Date:	Tue, 13 Jan 2009 12:23:38 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [tty bug] kernel BUG at drivers/char/tty_ldisc.c:359!

On Tue, 13 Jan 2009 13:10:39 +0100
Ingo Molnar <mingo@...e.hu> wrote:

> 
> FYI, -tip testing found a new warning in drivers/char/tty_ldisc.c:

Thanks - yes there is a real bug that is exposed by the BKL drop if you
manage to hit the flush ioctl as the ldisc changes 

Change the 
	ld = tty_ldisc_ref(tty)

to
	ld = tty_ldisc_ref_wait(tty);

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