linux-kernel - [PATCH AUTOSEL 5.5 493/542] KVM: PPC: Book3S HV: Release lock on page-out failure path

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Message-Id: <20200214154854.6746-493-sashal@kernel.org>
Date:   Fri, 14 Feb 2020 10:48:05 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Bharata B Rao <bharata@...ux.ibm.com>,
        Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
        Paul Mackerras <paulus@...abs.org>,
        Sasha Levin <sashal@...nel.org>, kvm-ppc@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH AUTOSEL 5.5 493/542] KVM: PPC: Book3S HV: Release lock on page-out failure path

From: Bharata B Rao <bharata@...ux.ibm.com>

[ Upstream commit e032e3b55b6f487e48c163c5dca74086f147a169 ]

When migrate_vma_setup() fails in kvmppc_svm_page_out(),
release kvm->arch.uvmem_lock before returning.

Fixes: ca9f4942670 ("KVM: PPC: Book3S HV: Support for running secure guests")
Signed-off-by: Bharata B Rao <bharata@...ux.ibm.com>
Reviewed-by: Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@...abs.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/powerpc/kvm/book3s_hv_uvmem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kvm/book3s_hv_uvmem.c b/arch/powerpc/kvm/book3s_hv_uvmem.c
index 2de264fc31563..5914fbfa5e0a7 100644
--- a/arch/powerpc/kvm/book3s_hv_uvmem.c
+++ b/arch/powerpc/kvm/book3s_hv_uvmem.c
@@ -543,7 +543,7 @@ kvmppc_svm_page_out(struct vm_area_struct *vma, unsigned long start,
 
 	ret = migrate_vma_setup(&mig);
 	if (ret)
-		return ret;
+		goto out;
 
 	spage = migrate_pfn_to_page(*mig.src);
 	if (!spage || !(*mig.src & MIGRATE_PFN_MIGRATE))
-- 
2.20.1