linux-kernel - [PATCH 3.13.y-ckt 100/103] KVM: x86: Fix of previously incomplete fix for CVE-2014-8480

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Message-Id: <1424305990-17983-101-git-send-email-kamal@canonical.com>
Date:	Wed, 18 Feb 2015 16:33:07 -0800
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Nadav Amit <namit@...technion.ac.il>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13.y-ckt 100/103] KVM: x86: Fix of previously incomplete fix for CVE-2014-8480

3.13.11-ckt16 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nadav Amit <nadav.amit@...il.com>

commit 63ea0a49ae0b145b91ff2b070c01b66fc75854b9 upstream.

STR and SLDT with rip-relative operand can cause a host kernel oops.
Mark them as DstMem as well.

Signed-off-by: Nadav Amit <namit@...technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 arch/x86/kvm/emulate.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 4919b95..569c8ed 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -3733,8 +3733,8 @@ static const struct opcode group5[] = {
 };
 
 static const struct opcode group6[] = {
-	DI(Prot,	sldt),
-	DI(Prot,	str),
+	DI(Prot | DstMem,	sldt),
+	DI(Prot | DstMem,	str),
 	II(Prot | Priv | SrcMem16, em_lldt, lldt),
 	II(Prot | Priv | SrcMem16, em_ltr, ltr),
 	N, N, N, N,
-- 
1.9.1

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