[Xen-ia64-devel] RE: copy_from_user()

["Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx>]

I think that means that copy_from_user is copying from
or to a null pointer. 

> -----Original Message-----
> From: Haavard Bjerke [mailto:havard.bjerke@xxxxxxx] 
> Sent: Tuesday, April 26, 2005 9:56 AM
> To: Magenheimer, Dan (HP Labs Fort Collins)
> Cc: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
> Subject: copy_from_user()
> 
> I'm trying to get the privcmd interface working so that I can 
> interact with the event channel through /proc/xen/privcmd. 
> When dom0 tries to get parameters from the user with 
> copy_from_user(), Xen says:
> 
> $$$$$ PANIC in domain 0 (k6=f0000000040b0000): 
> ia64_do_page_fault: @ 0000000000000000???, iip=a0000001002c8)
> 
> copy_from_user() seems to be a large and complex routine, so 
> I'll just ask first if someone knows from the top of their 
> minds what's going on?
> 
> Håvard
> 

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