KVM: MMU: Set nx bit correctly on shadow ptes

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While the page table walker correctly generates a guest page fault
if a guest tries to execute a non-executable page, the shadow code does
not mark it non-executable.  This means that if a guest accesses an nx
page first with a read access, then subsequent code fetch accesses will
succeed.

Fix by setting the nx bit on shadow ptes.

Signed-off-by: Avi Kivity <avi@qumranet.com>

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Avi Kivity 2007-12-09 16:37:36 +02:00

parent fe135d2ceb

commit 8d87a03aea

1 changed files with 2 additions and 0 deletions

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drivers/kvm/paging_tmpl.h

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