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Commit cd1a4a98 authored by Uri Lublin's avatar Uri Lublin Committed by Avi Kivity
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KVM: Fix dirty page log bitmap size/access calculation 



Since dirty_bitmap is an unsigned long array, the alignment and size need
to take that into account.

Signed-off-by: default avatarUri Lublin <uril@qumranet.com>
Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
parent ab51a434

drivers/kvm/kvm_main.c

+2 −2
Original line number Diff line number Diff line
@@ -792,9 +792,9 @@ static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 
	if (!memslot->dirty_bitmap)

		goto out;



	n = ALIGN(memslot->npages, 8) / 8;

	n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;



	for (i = 0; !any && i < n; ++i)

	for (i = 0; !any && i < n/sizeof(long); ++i)

		any = memslot->dirty_bitmap[i];



	r = -EFAULT;