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Re: [PATCH] b43: Increase number of RX DMA slots

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From: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
Date: Tue, 19 Feb 2013 11:57:19 -0600

> The real problem is that some (perhaps all) versions of the firmware,
> which manages the 'in' pointer of the FIFO ring, appears to fail to
> detect the ring full condition. That is the real cause of the freeze;
> however, we do not have access to the firmware source. We don't even
> have the right to redistribute it, which is why we have the
> b43-fwcutter work around.

I understand your constraints, but this is a trivially remotely
DoS'able condition even on slow CPU atom laptops.

Send an "expansive" full sized frame followed by 300 or so 64-byte UDP
packets --> instant hang.
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