Re: [PATCH] usbnet.c, buf.overrun crash-bugfix, Kernel 2.6.12-rc1

[David Brownell]

On Thursday 24 March 2005 10:13 am, Jakemuksen spammiosote wrote:
> On Thu, 24 Mar 2005, David Brownell wrote:
> > On Thursday 24 March 2005 8:05 am, Jakemuksen spammiosote wrote:
> 
> >> +       if (unlikely((skb->tail + urb->actual_length) > skb->end)) {
> > 
> > This logic looks wrong.  If that ever happens, surely the problem is 
> > that the rx_submit() code submitted an urb with transfer_size that
> > mismatched the SKB.  The host controller isn't allowed to overrun the
> 
> Sounds reasonable. So, I'll go thru the HCD code

Better yet, start with the code supporting that device you're
under NDA for.


> instead if the  
> responsibility is there. Am i the first one to run into such crash 
> situation? If so, perhaps it's not ever worthy to fix in mainstream 
> kernel, as the device causes the crash under very specific - 
> 'abusing' one might say, situation only.

You're the first one to report such a problem.

- Dave
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