Paul Brook wrote:
> On Sunday 13 July 2008, Jan Kiszka wrote:
>> page_find_alloc, used e.g. for TB allocation, is not safe on 64-bit
>> hosts for 32-bit guests. Patch below fixes this by requesting new pages
>> only from the guest-reachable address range.
> 
> I'm pretty sure this is wrong. The structures allocated by page_find_alloc do 
> not need to be accessible by the guest. In fact it's better if they are 
> outside the guest address space.

Bet we have "addr = h2g(p);" in page_find_alloc(), ie. we expect to
retrieve a valid guest address (for use with page_set_flag). Something
is borken here, but you can surely better tell us what precisely than
I'm able to.

Jan