KVM: x86 emulator: do not call writeback if msr access fails.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 1393bf0..b89a8f2 100644 (file)
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2563,7 +2563,7 @@ twobyte_insn:
                        | ((u64)c->regs[VCPU_REGS_RDX] << 32);
                if (kvm_set_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], msr_data)) {
                        kvm_inject_gp(ctxt->vcpu, 0);
-                       c->eip = ctxt->eip;
+                       goto done;
                }
                rc = X86EMUL_CONTINUE;
                c->dst.type = OP_NONE;
@@ -2572,7 +2572,7 @@ twobyte_insn:
                /* rdmsr */
                if (kvm_get_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], &msr_data)) {
                        kvm_inject_gp(ctxt->vcpu, 0);
-                       c->eip = ctxt->eip;
+                       goto done;
                } else {
                        c->regs[VCPU_REGS_RAX] = (u32)msr_data;
                        c->regs[VCPU_REGS_RDX] = msr_data >> 32;