Commit eb64f1e8 authored Dec 09, 2008 by Marcelo Tosatti Committed by Avi Kivity Dec 31, 2008

KVM: MMU: check for present pdptr shadow page in walk_shadow



walk_shadow assumes the caller verified validity of the pdptr pointer in
question, which is not the case for the invlpg handler.

Fixes oops during Solaris 10 install.

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

parent ca9edaee

arch/x86/kvm/mmu.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1269,6 +1269,8 @@ static int walk_shadow(struct kvm_shadow_walk *walker,
		if (level == PT32E_ROOT_LEVEL) {
		shadow_addr = vcpu->arch.mmu.pae_root[(addr >> 30) & 3];
		shadow_addr &= PT64_BASE_ADDR_MASK;
		if (!shadow_addr)
		return 1;
		--level;
		}