Re: [linux-usb-devel] Re: serious 2.6 bug in USB subsystem?

[David Brownell]

David Mosberger wrote:
> On x86, there is no OOps, it just freezes.  On ia64, I get a nice MCA
> and from that we can infer that a USB host controller read from
> address 0xf0000000 caused the problem but since this is asynchronous
> to the kernel's code path, the instruction pointer etc. in the MCA
> state dump isn't terribly helpful. 

Does that 0xf0000000 (on ia64) match any obvious address mapping
of the null pointer -- like a dma mapping?  I'm not sure that if
the HID driver were to pass a null buffer pointer, it would be
caught anywhere.

- Dave



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