[PATCH v13 73/85] KVM: PPC: Remove extra get_page() to fix page refcount leak

Sean Christopherson
2024-10-10T23:01:34Z

Don't manually do get_page() when patching dcbz, as gfn_to_page() gifts
the caller a reference. I.e. doing get_page() will leak the page due to
not putting all references.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/powerpc/kvm/book3s_pr.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index d7721297b9b6..cd7ab6d85090 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -652,7 +652,6 @@ static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
hpage_offset &= ~0xFFFULL;
hpage_offset /= 4;

- get_page(hpage);
page = kmap_atomic(hpage);

/* patch dcbz into reserved instruction, so we trap */