From 51e4d5ab28c75d819b3840da11559ad5c1429135 Mon Sep 17 00:00:00 2001 From: Carsten Otte Date: Tue, 12 May 2009 17:21:53 +0200 Subject: [PATCH] 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 Signed-off-by: Carsten Otte Signed-off-by: Christian Ehrhardt Signed-off-by: Avi Kivity --- arch/s390/kvm/kvm-s390.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 628494a43425..10bccd1f8aee 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -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); -- GitLab