[3.16.y-ckt stable] Patch "KVM: s390: Zero out current VMDB of STSI before including level3 data." has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Wed May 6 09:49:25 UTC 2015


This is a note to let you know that I have just added a patch titled

    KVM: s390: Zero out current VMDB of STSI before including level3 data.

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt11.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From c6f29a86cc7e58f66322cac3180aad4989fb6315 Mon Sep 17 00:00:00 2001
From: Ekaterina Tumanova <tumanova at linux.vnet.ibm.com>
Date: Tue, 3 Mar 2015 09:54:41 +0100
Subject: KVM: s390: Zero out current VMDB of STSI before including level3
 data.

commit b75f4c9afac2604feb971441116c07a24ecca1ec upstream.

s390 documentation requires words 0 and 10-15 to be reserved and stored as
zeros. As we fill out all other fields, we can memset the full structure.

Signed-off-by: Ekaterina Tumanova <tumanova at linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi at linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger at de.ibm.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 arch/s390/kvm/priv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index 9f41229df1aa..3d2e3b7c50db 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -470,6 +470,7 @@ static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
 	for (n = mem->count - 1; n > 0 ; n--)
 		memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));

+	memset(&mem->vm[0], 0, sizeof(mem->vm[0]));
 	mem->vm[0].cpus_total = cpus;
 	mem->vm[0].cpus_configured = cpus;
 	mem->vm[0].cpus_standby = 0;




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