diff options
| author |   Avi Kivity <avi@redhat.com> | 2012-03-05 14:23:29 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-03-08 14:10:30 +0200 |
| commit | 3e515705a1f46beb1c942bb8043c16f8ac7b1e9e (patch) | |
| tree | fd0e53e5f51e6e03dda80d7aec6073f5cb694fd1 /Documentation/virtual | |
| parent | KVM: x86 emulator: Allow PM/VM86 switch during task switch (diff) | |
| download | linux-dev-3e515705a1f46beb1c942bb8043c16f8ac7b1e9e.tar.xz linux-dev-3e515705a1f46beb1c942bb8043c16f8ac7b1e9e.zip | |
KVM: Ensure all vcpus are consistent with in-kernel irqchip settings
If some vcpus are created before KVM_CREATE_IRQCHIP, then
irqchip_in_kernel() and vcpu->arch.apic will be inconsistent, leading
to potential NULL pointer dereferences.
Fix by:
- ensuring that no vcpus are installed when KVM_CREATE_IRQCHIP is called
- ensuring that a vcpu has an apic if it is installed after KVM_CREATE_IRQCHIP
This is somewhat long winded because vcpu->arch.apic is created without
kvm->lock held.
Based on earlier patch by Michael Ellerman.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'Documentation/virtual')
0 files changed, 0 insertions, 0 deletions