Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=eff708bc2bacd4f22cf844871341bef341bd096a
Commit: eff708bc2bacd4f22cf844871341bef341bd096a
Parent: 47ad8e689b4f94f9fc3b2588a7aaa65e4eca667c
Author: Avi Kivity <[EMAIL PROTECTED]>
AuthorDate: Sun May 6 16:10:01 2007 +0300
Committer: Avi Kivity <[EMAIL PROTECTED]>
CommitDate: Mon Jul 16 12:05:41 2007 +0300
KVM: VMX: Only reload guest msrs if they are already loaded
If we set an msr via an ioctl() instead of by handling a guest exit, we
have the host state loaded, so reloading the msrs would clobber host
state instead of guest state.
This fixes a host oops (and loss of a cpu) on a guest reboot.
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
---
drivers/kvm/vmx.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 096cb6a..b353eaa 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -600,7 +600,8 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, u32
msr_index, u64 data)
msr = find_msr_entry(vcpu, msr_index);
if (msr)
msr->data = data;
- load_msrs(vcpu->guest_msrs, NR_BAD_MSRS);
+ if (vcpu->vmx_host_state.loaded)
+ load_msrs(vcpu->guest_msrs, NR_BAD_MSRS);
break;
#endif
case MSR_IA32_SYSENTER_CS:
-
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