KVM: MMU: handle n_free_mmu_pages > n_alloc_mmu_pages in kvm_mmu_change_mmu_pages

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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>

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Marcelo Tosatti 2009-07-22 13:05:49 -03:00 • committed by Avi Kivity

parent 4b656b1202

commit 025dbbf36a

1 changed files with 8 additions and 7 deletions

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arch/x86/kvm/mmu.c

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