From patchwork Wed Jan 18 23:17:37 2012
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Subject: [2/3] KVM: PPC: Initialize linears with zeros
Date: Wed, 18 Jan 2012 13:17:37 -0000
From: Alexander Graf <agraf@suse.de>
X-Patchwork-Id: 136724
Message-Id: <1326928658-10791-3-git-send-email-agraf@suse.de>
To: kvm-ppc <kvm-ppc@vger.kernel.org>
Cc: Paul Mackerras <paulus@samba.org>,
 "dvaleev@suse.com Valeev" <DValeev@suse.com>,
 KVM list <kvm@vger.kernel.org>, David Gibson <david@gibson.dropbear.id.au>

RMAs and HPT preallocated spaces should be zeroed, so we don't accidently
leak information from previous VM executions.

Signed-off-by: Alexander Graf <agraf@suse.de>
Acked-by: Paul Mackerras <paulus@samba.org>

---
arch/powerpc/kvm/book3s_hv_builtin.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c b/arch/powerpc/kvm/book3s_hv_builtin.c
index 1c7e6ab..7caed1d 100644
--- a/arch/powerpc/kvm/book3s_hv_builtin.c
+++ b/arch/powerpc/kvm/book3s_hv_builtin.c
@@ -152,6 +152,7 @@ static struct kvmppc_linear_info *kvm_alloc_linear(int type)
 		break;
 	}
 	spin_unlock(&linear_lock);
+	memset(ri->base_virt, 0, ri->npages << PAGE_SHIFT);
 	return ri;
 }