netdev - Re: [PATCH net v2] net: usbnet: prevent buggy devices from killing us

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Message-Id: <20130130.173633.1911213197565689159.davem@davemloft.net>
Date:	Wed, 30 Jan 2013 17:36:33 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	oliver@...kum.org
Cc:	bjorn@...k.no, netdev@...r.kernel.org, linux-usb@...r.kernel.org,
	joe@...ches.com
Subject: Re: [PATCH net v2] net: usbnet: prevent buggy devices from killing
 us

From: Oliver Neukum <oliver@...kum.org>
Date: Wed, 30 Jan 2013 08:44:35 +0100

> On Tuesday 29 January 2013 10:51:28 Bjørn Mork wrote:
>> A device sending 0 length frames as fast as it can has been
>> observed killing the host system due to the resulting memory
>> pressure.
>> 
>> Temporarily disable RX skb allocation and URB submission when
>> the current error ratio is high, preventing us from trying to
>> allocate an infinite number of skbs.  Reenable as soon as we
>> are finished processing the done queue, allowing the device
>> to continue working after short error bursts.
>> 
>> Signed-off-by: Bjørn Mork <bjorn@...k.no>
> Acked-by: Oliver Neukum <oneukum@...e.de>

Applied, thanks.
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