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

From: roel kluin
Date: Tue Feb 09 2010 - 17:10:16 EST


On Tue, Feb 9, 2010 at 11:01 PM, Sarah Sharp
<sarah.a.sharp@xxxxxxxxxxxxxxx> 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@xxxxxxxxx>
>> Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
>
> Bah, yes, you're right. :) ÂGood catch.

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

Thanks,
Roel
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/