linux-kernel - [PATCH 5.15 088/110] KVM: x86/mmu: kvm_faultin_pfn has to return false if pfh is returned

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Message-Id: <20220314112745.487207310@linuxfoundation.org>
Date:   Mon, 14 Mar 2022 12:54:30 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Maxim Levitsky <mlevitsk@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Andrei Vagin <avagin@...il.com>
Subject: [PATCH 5.15 088/110] KVM: x86/mmu: kvm_faultin_pfn has to return false if pfh is returned

From: Andrei Vagin <avagin@...il.com>

commit a7cc099f2ec3117678adeb69749bef7e9dde3148 upstream.

This looks like a typo in 8f32d5e563cb. This change didn't intend to do
any functional changes.

The problem was caught by gVisor tests.

Fixes: 8f32d5e563cb ("KVM: x86/mmu: allow kvm_faultin_pfn to return page fault handling code")
Cc: Maxim Levitsky <mlevitsk@...hat.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>
Signed-off-by: Andrei Vagin <avagin@...il.com>
Message-Id: <20211015163221.472508-1-avagin@...il.com>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/x86/kvm/mmu/mmu.c |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -3967,6 +3967,7 @@ static bool kvm_faultin_pfn(struct kvm_v
 
 	*pfn = __gfn_to_pfn_memslot(slot, gfn, false, NULL,
 				    write, writable, hva);
+	return false;
 
 out_retry:
 	*r = RET_PF_RETRY;