[PATCH 2/2] KVM: Prevent overflow in largepages calculation

[Avi Kivity <avi@redhat.com>]

If userspace specifies a memory slot that is larger than 8 petabytes, it
could overflow the largepages variable.

Signed-off-by: Avi Kivity <avi@redhat.com>
---
 virt/kvm/kvm_main.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index b9ca73c..669eb4a 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1087,8 +1087,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
 	int r;
 	gfn_t base_gfn;
 	unsigned long npages, ugfn;
-	int largepages;
-	unsigned long i;
+	unsigned long largepages, i;
 	struct kvm_memory_slot *memslot;
 	struct kvm_memory_slot old, new;
 
-- 
1.6.0.6