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KVM: s390: Verify memory in kvm run

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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>
This commit is contained in:
Carsten Otte 2009-05-12 17:21:53 +02:00 committed by Avi Kivity
parent 3edbcff9bf
commit 51e4d5ab28
1 changed files with 6 additions and 0 deletions
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6
arch/s390/kvm/kvm-s390.c
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@ -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);