commit 025dbbf36a7680bffe54d9dcbf0a8bc01a7cbd10
author Marcelo Tosatti <mtosatti@redhat.com> Wed Jul 22 13:05:49 2009 -0300
committer Avi Kivity <avi@redhat.com> Wed Aug 05 13:59:43 2009 +0300
tree 17ae3afc86e2cbd71101b136933432928e60b7b7
parent 4b656b1202498184a0ecef86b3b89ff613b9c6ab

KVM: MMU: handle n_free_mmu_pages > n_alloc_mmu_pages in kvm_mmu_change_mmu_pages

kvm_mmu_change_mmu_pages mishandles the case where n_alloc_mmu_pages is
smaller then n_free_mmu_pages, by not checking if the result of
the subtraction is negative.

Its a valid condition which can happen if a large number of pages has
been recently freed.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>