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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2009-08-03 14:57:48 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-09-08 20:33:27 -0700 |
| commit | 4877f4a4c8d80472228e0c843fee5957ae1f94d1 (patch) | |
| tree | c6c9651bc5c0b05f363d5e6b2b936a5380909428 | |
| parent | cbceeda22d9e11693b9ba81b8fd2c78acc87e341 (diff) | |
KVM: take mmu_lock when updating a deleted slot
(cherry picked from commit b43b1901ad282aeb74161837fb403927102687a1)
kvm_handle_hva relies on mmu_lock protection to safely access
the memslot structures.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | virt/kvm/kvm_main.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 148982913805..fe0b1eee0898 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1055,8 +1055,10 @@ int __kvm_set_memory_region(struct kvm *kvm, kvm_free_physmem_slot(&old, npages ? &new : NULL); /* Slot deletion case: we have to update the current slot */ + spin_lock(&kvm->mmu_lock); if (!npages) *memslot = old; + spin_unlock(&kvm->mmu_lock); #ifdef CONFIG_DMAR /* map the pages in iommu page table */ r = kvm_iommu_map_pages(kvm, base_gfn, npages); |