linux-kernel - [PATCH 3.10 18/32] KVM: x86: Fix of previously incomplete fix for CVE-2014-8480

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Message-Id: <20150128012629.760129281@linuxfoundation.org>
Date:	Tue, 27 Jan 2015 17:26:48 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Nadav Amit <namit@...technion.ac.il>,
	Paolo Bonzini <pbonzini@...hat.com>
Subject: [PATCH 3.10 18/32] KVM: x86: Fix of previously incomplete fix for CVE-2014-8480

3.10-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: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/x86/kvm/emulate.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -3808,8 +3808,8 @@ 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,


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