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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2009-03-23 17:51:32 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-05-02 10:57:10 -0700 |
| commit | 3899af53551a9d5f0b316b9b5d1afba2ac47d0a9 (patch) | |
| tree | cb9d57b4356234a32734ebed0101df0a47a80cf6 | |
| parent | 14e360ee2c711a4ce10d90389773cadea30c54f6 (diff) | |
| download | linux-3899af53551a9d5f0b316b9b5d1afba2ac47d0a9.tar.gz linux-3899af53551a9d5f0b316b9b5d1afba2ac47d0a9.tar.bz2 linux-3899af53551a9d5f0b316b9b5d1afba2ac47d0a9.zip | |
KVM: MMU: check for present pdptr shadow page in walk_shadow
(cherry picked from eb64f1e8cd5c3cae912db30a77d062367f7a11a6)
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -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 47c5d3a47f96..0d2918632b88 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1159,6 +1159,8 @@ 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; } |