Commit cd0d9137 authored by Nguyen Anh Quynh's avatar Nguyen Anh Quynh Committed by Avi Kivity
Browse files

KVM: Fix *nopage() in kvm_main.c 



*nopage() in kvm_main.c should only store the type of mmap() fault if
the pointers are not NULL. This patch fixes the problem.

Signed-off-by: default avatarNguyen Anh Quynh <aquynh@gmail.com>
Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
parent 81fe96bd

drivers/kvm/kvm_main.c

+6 −2
Original line number Diff line number Diff line
@@ -2285,7 +2285,6 @@ static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma, 
	unsigned long pgoff;

	struct page *page;



	*type = VM_FAULT_MINOR;

	pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;

	if (pgoff == 0)

		page = virt_to_page(vcpu->run);
@@ -2294,6 +2293,9 @@ static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma, 
	else

		return NOPAGE_SIGBUS;

	get_page(page);

	if (type != NULL)

		*type = VM_FAULT_MINOR;



	return page;

}
@@ -2768,12 +2770,14 @@ static struct page *kvm_vm_nopage(struct vm_area_struct *vma, 
	unsigned long pgoff;

	struct page *page;



	*type = VM_FAULT_MINOR;

	pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;

	page = gfn_to_page(kvm, pgoff);

	if (!page)

		return NOPAGE_SIGBUS;

	get_page(page);

	if (type != NULL)

		*type = VM_FAULT_MINOR;



	return page;

}