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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2008-12-09 16:07:22 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2008-12-31 16:55:46 +0200 |
| commit | eb64f1e8cd5c3cae912db30a77d062367f7a11a6 (patch) | |
| tree | 9a0f0f9774211b77cf6b5c2e6914e6e88c7b42f1 /arch/x86/kvm/mmu.c | |
| parent | ca9edaee1aea34ebd9adb48910aba0b3d64b1b22 (diff) | |
| download | blackbird-op-linux-eb64f1e8cd5c3cae912db30a77d062367f7a11a6.tar.gz blackbird-op-linux-eb64f1e8cd5c3cae912db30a77d062367f7a11a6.zip | |
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/kvm/mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 863baf70506e..641c07844e6e 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; } |
