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authorMarcelo Tosatti <mtosatti@redhat.com>2008-12-09 16:07:22 +0100
committerAvi Kivity <avi@redhat.com>2008-12-31 16:55:46 +0200
commiteb64f1e8cd5c3cae912db30a77d062367f7a11a6 (patch)
tree9a0f0f9774211b77cf6b5c2e6914e6e88c7b42f1 /arch/x86
parentca9edaee1aea34ebd9adb48910aba0b3d64b1b22 (diff)
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>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kvm/mmu.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 863baf70506..641c07844e6 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -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;
}