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[PATCH 3.12 69/72] KVM: x86: Use new is_noncanonical_address in _linearize

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  [PATCH 3.12 69/72] KVM: x86: Use new is_noncanonical_address in _linearize Jiri Slaby <jslaby@suse.cz> - 2015-11-23 14:20 +0100

#1275324 — [PATCH 3.12 69/72] KVM: x86: Use new is_noncanonical_address in _linearize

From: Nadav Amit <namit@cs.technion.ac.il>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 4be4de7ef9fd3a4d77320d4713970299ffecd286 upstream.

Replace the current canonical address check with the new function which is
identical.

Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/x86/kvm/emulate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index ffae11d0754a..cad86cd56f82 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -664,7 +664,7 @@ static int __linearize(struct x86_emulate_ctxt *ctxt,
 	la = seg_base(ctxt, addr.seg) + addr.ea;
 	switch (ctxt->mode) {
 	case X86EMUL_MODE_PROT64:
-		if (((signed long)la << 16) >> 16 != la)
+		if (is_noncanonical_address(la))
 			return emulate_gp(ctxt, 0);
 		break;
 	default:
-- 
2.6.3

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