From 83efa8edb43ad69a5f801334170d41557cdca89b Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Mon, 8 Jun 2009 15:55:21 +0300 Subject: KVM: Prevent overflow in largepages calculation commit 09f8ca74ae6c2d78b2c7f6c0751ed0cbe815a3d9 upstream. If userspace specifies a memory slot that is larger than 8 petabytes, it could overflow the largepages variable. Signed-off-by: Avi Kivity Signed-off-by: Greg Kroah-Hartman --- virt/kvm/kvm_main.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'virt') diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index cf4bdc97faa4..acef47527711 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -920,8 +920,7 @@ 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; -- cgit v1.2.3