[PATCH] KVM: SVM: Fix sparse: incorrect type in argument 1 (different base types)

From: Brijesh Singh <brijesh.singh@amd.com>
To: kvm@vger.kernel.org
Cc: "Brijesh Singh" <brijesh.singh@amd.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Radim Krčmář" <rkrcmar@redhat.com>,
	"Borislav Petkov" <bp@suse.de>,
	"Tom Lendacky" <thomas.lendacky@amd.com>,
	linux-kernel@vger.kernel.org, "Joerg Roedel" <joro@8bytes.org>
Subject: [PATCH] KVM: SVM: Fix sparse: incorrect type in argument 1 (different base types)
Date: Mon, 19 Feb 2018 10:12:28 -0600	[thread overview]
Message-ID: <20180219161228.46931-1-brijesh.singh@amd.com> (raw)

Fix sparse: incorrect type in argument 1 (different base types). Typecast
the userspace address argument.

Fixes: 0d0736f76347 (KVM: SVM: Add support for KVM_SEV_LAUNCH_MEASURE ...)
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: linux-kernel@vger.kernel.org
Cc: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
 arch/x86/kvm/svm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index b3e488a74828..a2f1bb73640c 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -6262,7 +6262,9 @@ static int sev_launch_measure(struct kvm *kvm, struct kvm_sev_cmd *argp)
 			goto e_free;
 		}
 
-		if (!access_ok(VERIFY_WRITE, params.uaddr, params.len)) {
+		if (!access_ok(VERIFY_WRITE,
+			       (void __user *)(uintptr_t)params.uaddr,
+			       params.len)) {
 			ret = -EFAULT;
 			goto e_free;
 		}
-- 
2.14.3
