Commit 09f8ca74 authored Jun 08, 2009 by Avi Kivity

KVM: Prevent overflow in largepages calculation



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

Cc: stable@kernel.org
Signed-off-by: Avi Kivity <avi@redhat.com>

parent ac04527f

virt/kvm/kvm_main.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -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;