linux-kernel - [PATCH 3.12 69/72] KVM: x86: Use new is_noncanonical_address in

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Message-Id: <2b27106cd93020563185ea94618ea5019308226b.1448283890.git.jslaby@suse.cz>
Date:	Mon, 23 Nov 2015 14:12:30 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Nadav Amit <namit@...technion.ac.il>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 69/72] KVM: x86: Use new is_noncanonical_address in _linearize

From: Nadav Amit <namit@...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@...technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
Signed-off-by: Jiri Slaby <jslaby@...e.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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