diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2008-04-04 17:21:22 -0300 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-04-05 00:23:49 +0300 |
| commit | 3743888cafbada95d9907a1b5fb001993b1ee03e (patch) | |
| tree | 247791ceee68be9f534c86e0ba81012f7ab8f7d6 | |
| parent | fafac27bad9f4d8fd9f0b50e41c5591eb0805cd7 (diff) | |
Account for the case where memslot size is largepage aligned, but does not
start on largepage aligned offset.
Otherwise it allocates one lpage_info struct less than what the memslot
spans, possibly resulting in memory corruption.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
| -rw-r--r-- | virt/kvm/kvm_main.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 3396a5f9be5d..93ed78b015c0 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -347,6 +347,9 @@ int __kvm_set_memory_region(struct kvm *kvm, int largepages = npages / KVM_PAGES_PER_HPAGE; if (npages % KVM_PAGES_PER_HPAGE) largepages++; + if (base_gfn % KVM_PAGES_PER_HPAGE) + largepages++; + new.lpage_info = vmalloc(largepages * sizeof(*new.lpage_info)); if (!new.lpage_info) |