diff mbox

[6/6] kvm-s390: Verify memory in kvm run

Message ID 1242141713-20863-7-git-send-email-ehrhardt@linux.vnet.ibm.com (mailing list archive)
State New, archived
Headers show

Commit Message

ehrhardt@linux.vnet.ibm.com May 12, 2009, 3:21 p.m. UTC 
From: Carsten Otte <cotte@de.ibm.com>

This check verifies that the guest we're trying to run in KVM_RUN
has some memory assigned to it. It enters an endless exception
loop if this is not the case.

Reported-by: Mijo Safradin <mijo@linux.vnet.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Ehrhardt <ehrhardt@de.ibm.com>
---
 arch/s390/kvm/kvm-s390.c |    6 ++++++
 1 file changed, 6 insertions(+)

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diff mbox

Patch

Index: kvm/arch/s390/kvm/kvm-s390.c
===================================================================
--- kvm.orig/arch/s390/kvm/kvm-s390.c
+++ kvm/arch/s390/kvm/kvm-s390.c
@@ -478,6 +478,12 @@  int kvm_arch_vcpu_ioctl_run(struct kvm_v
 
 	vcpu_load(vcpu);
 
+	/* verify, that memory has been registered */
+	if (!vcpu->kvm->arch.guest_memsize) {
+		vcpu_put(vcpu);
+		return -EINVAL;
+	}
+
 	if (vcpu->sigset_active)
 		sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);