linux-kernel - Re: [PATCH] serial8250: Sanity check nr

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Message-ID: <20080711210516.02a04245@lxorguk.ukuu.org.uk>
Date:	Fri, 11 Jul 2008 21:05:16 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	ebiederm@...ssion.com (Eric W. Biederman)
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	<linux-kernel@...r.kernel.org>,
	Russell King <rmk+lkml@....linux.org.uk>,
	linux-serial@...r.kernel.org, Bryan Wu <cooloney@...nel.org>
Subject: Re: [PATCH] serial8250: Sanity check nr_uarts on all paths.

On Fri, 11 Jul 2008 12:30:42 -0700
ebiederm@...ssion.com (Eric W. Biederman) wrote:

> 
> 
> I had 8250.nr_uarts=16 in the boot line of a test kernel and I had a
> weird mysterious crash in sysfs.  After an taking in depth look I realized
> that CONFIG_SERIAL_8250_NR_UARTS was set to 4 and I was walking off
> the end of the serial8250_ports array.
> 
> Ouch!!!
> 
> Don't let this happen to someone else.
> 
> Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com>

Acked-by: Alan Cox <alan@...hat.com>

Added to ttydev tree but please fire straight at Linus in case he fancies
it for 2.6.26
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