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| author | Avi Kivity <avi@redhat.com> | 2009-06-08 15:55:21 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-06-10 15:18:16 +0300 |
| commit | 09f8ca74ae6c2d78b2c7f6c0751ed0cbe815a3d9 (patch) | |
| tree | fb45101cca1b35798c61fecfc28f590f071f755b /virt/kvm | |
| parent | ac04527f7947020c5890090b2ac87af4e98d977e (diff) | |
| download | lwn-09f8ca74ae6c2d78b2c7f6c0751ed0cbe815a3d9.tar.gz lwn-09f8ca74ae6c2d78b2c7f6c0751ed0cbe815a3d9.zip | |
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>
Diffstat (limited to 'virt/kvm')
| -rw-r--r-- | 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 5f865ed4c431..e21194566b71 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; |