linux-kernel - Re: [GIT PATCH] TTY patches for 3.7-rc1

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Message-ID: <20121001221350.GA10172@kroah.com>
Date:	Mon, 1 Oct 2012 15:13:50 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Jiri Slaby <jslaby@...e.cz>, Stanislav Kozina <skozina@...hat.com>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org, Stanislav Kozina <skozina@...hat.com>
Subject: Re: [GIT PATCH] TTY patches for 3.7-rc1

On Mon, Oct 01, 2012 at 11:48:58PM +0200, Jiri Slaby wrote:
> On 10/01/2012 08:30 PM, Greg KH wrote:
> > Stanislav Kozina (2):
> >       tty: Fix possible race in n_tty_read()
> 
> The (pretty hopeless) commit log says:
>     Fix possible panic caused by unlocked access to tty->read_cnt in
>     while-loop condition in n_tty_read().
> 
> Just curious, what kind of panic that can cause, can you be more
> concrete on that? I suppose two readers, one eats everything, the other
> is a killer? And should we backport to -stable?

Stanislav, you are the one who could reproduce this, any answers here?

thanks,

greg k-h
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