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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>
hifive-unleashed-5.1
Avi Kivity 2009-06-08 15:55:21 +03:00
parent ac04527f79
commit 09f8ca74ae
1 changed files with 1 additions and 2 deletions
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3
virt/kvm/kvm_main.c
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@ -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;