Commit 51e4d5ab authored May 12, 2009 by Carsten Otte Committed by Avi Kivity Jun 10, 2009

KVM: s390: Verify memory in kvm run



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>
Signed-off-by: Avi Kivity <avi@redhat.com>

parent 3edbcff9

arch/s390/kvm/kvm-s390.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -487,6 +487,12 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run kvm_run)

		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);