From: David Woodhouse <[email protected]> kvm_host_page_size() uses find_vma() to determine the host page size backing a guest page. find_vma() returns the next VMA when the address falls in an unmapped hole, which means an unmapped address inherits the page size of a completely unrelated VMA at a higher address. This is never a meaningful result.
Replace find_vma() with vma_lookup() so that a hole address returns NULL, causing the function to return PAGE_SIZE (the safe default) rather than an unrelated VMA's page size. This is currently only cosmetic, as the only caller is in PPC book3s support (kvmppc_xive_native_set_queue_config()) and subsequently returns failure if !gfn_to_page() anyway. Signed-off-by: David Woodhouse <[email protected]> --- virt/kvm/kvm_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 89489996fbc1..d33761123459 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -2693,7 +2693,7 @@ unsigned long kvm_host_page_size(struct kvm_vcpu *vcpu, gfn_t gfn) return PAGE_SIZE; mmap_read_lock(current->mm); - vma = find_vma(current->mm, addr); + vma = vma_lookup(current->mm, addr); if (!vma) goto out; -- 2.43.0
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