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-rw-r--r--arch/s390/kvm/gaccess.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/s390/kvm/gaccess.h b/arch/s390/kvm/gaccess.h
index 4703f12..84d01dd 100644
--- a/arch/s390/kvm/gaccess.h
+++ b/arch/s390/kvm/gaccess.h
@@ -22,13 +22,16 @@ static inline void __user *__guestaddr_to_user(struct kvm_vcpu *vcpu,
unsigned long guestaddr)
{
unsigned long prefix = vcpu->arch.sie_block->prefix;
+ unsigned long uaddress;
if (guestaddr < 2 * PAGE_SIZE)
guestaddr += prefix;
else if ((guestaddr >= prefix) && (guestaddr < prefix + 2 * PAGE_SIZE))
guestaddr -= prefix;
-
- return (void __user *) gmap_fault(guestaddr, vcpu->arch.gmap);
+ uaddress = gmap_fault(guestaddr, vcpu->arch.gmap);
+ if (IS_ERR_VALUE(uaddress))
+ uaddress = -EFAULT;
+ return (void __user *)uaddress;
}
static inline int get_guest_u64(struct kvm_vcpu *vcpu, unsigned long guestaddr,