aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorCarsten Otte <cotte@de.ibm.com>2011-10-18 12:27:12 +0200
committerAvi Kivity <avi@redhat.com>2011-10-30 12:20:55 +0200
commit4d47555a80495657161a7e71ec3014ff2021e450 (patch)
treef5e12258ee93dc20c230e7dc60620c6d0194142e
parenta3e06bbe8445f57eb949e6474c5a9b30f24d2057 (diff)
KVM: s390: check cpu_id prior to using it
We use the cpu id provided by userspace as array index here. Thus we clearly need to check it first. Ooops. CC: <stable@vger.kernel.org> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
-rw-r--r--arch/s390/kvm/kvm-s390.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index dc2b580e27bc..0cba935d1282 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -312,11 +312,17 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
unsigned int id)
{
- struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL);
- int rc = -ENOMEM;
+ struct kvm_vcpu *vcpu;
+ int rc = -EINVAL;
+
+ if (id >= KVM_MAX_VCPUS)
+ goto out;
+
+ rc = -ENOMEM;
+ vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL);
if (!vcpu)
- goto out_nomem;
+ goto out;
vcpu->arch.sie_block = (struct kvm_s390_sie_block *)
get_zeroed_page(GFP_KERNEL);
@@ -352,7 +358,7 @@ out_free_sie_block:
free_page((unsigned long)(vcpu->arch.sie_block));
out_free_cpu:
kfree(vcpu);
-out_nomem:
+out:
return ERR_PTR(rc);
}

Privacy Policy