diff options
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index a2a785472431..35f82f2c66f6 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3208,18 +3208,15 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_memslots *slots, *old_slots; unsigned long *dirty_bitmap; - r = -ENOMEM; - dirty_bitmap = vmalloc(n); - if (!dirty_bitmap) - goto out; + dirty_bitmap = memslot->dirty_bitmap_head; + if (memslot->dirty_bitmap == dirty_bitmap) + dirty_bitmap += n / sizeof(long); memset(dirty_bitmap, 0, n); r = -ENOMEM; slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); - if (!slots) { - vfree(dirty_bitmap); + if (!slots) goto out; - } memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots)); slots->memslots[log->slot].dirty_bitmap = dirty_bitmap; slots->generation++; @@ -3235,11 +3232,8 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, spin_unlock(&kvm->mmu_lock); r = -EFAULT; - if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n)) { - vfree(dirty_bitmap); + if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n)) goto out; - } - vfree(dirty_bitmap); } else { r = -EFAULT; if (clear_user(log->dirty_bitmap, n)) |