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authorAvi Kivity <avi@redhat.com>2009-06-08 15:55:21 +0300
committerAvi Kivity <avi@redhat.com>2009-06-10 15:18:16 +0300
commit09f8ca74ae6c2d78b2c7f6c0751ed0cbe815a3d9 (patch)
treefb45101cca1b35798c61fecfc28f590f071f755b /virt
parentac04527f7947020c5890090b2ac87af4e98d977e (diff)
downloadlinux-linaro-stable-09f8ca74ae6c2d78b2c7f6c0751ed0cbe815a3d9.tar.gz
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')
-rw-r--r--virt/kvm/kvm_main.c3
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;