linux-kernel - Re: [PATCH] USB: don't read past config->interface[] if usb_control_msg() fails in usb_reset

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Message-ID: <25e057c01002091409l83a7d7fwd2f7762725f83e50@mail.gmail.com>
Date:	Tue, 9 Feb 2010 23:09:45 +0100
From:	roel kluin <roel.kluin@...il.com>
To:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Greg Kroah-Hartman <gregkh@...e.de>, linux-usb@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] USB: don't read past config->interface[] if 
	usb_control_msg() fails in usb_reset_configuration()

On Tue, Feb 9, 2010 at 11:01 PM, Sarah Sharp
<sarah.a.sharp@...ux.intel.com> wrote:
> On Tue, Feb 09, 2010 at 05:01:53PM +0100, Roel Kluin wrote:
>> After the loop `for (i = 0; i < config->desc.bNumInterfaces; i++)' if no
>> break occurred, i equals config->desc.bNumInterfaces. so if
>> usb_control_msg() failed then after goto reset_old_alts we read from
>> config->interface[config->desc.bNumInterfaces].
>> We can safely decrement i as well if the break occurred.
>>
>> Signed-off-by: Roel Kluin <roel.kluin@...il.com>
>> Acked-by: Alan Stern <stern@...land.harvard.edu>
>
> Bah, yes, you're right. :)  Good catch.

Could you please confirm whether this patch is the better or the
other (in this same thread)?

Thanks,
Roel
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