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KVM: s390: vsie: fix riccbd 

We store the address of riccbd at the wrong location, overwriting
gvrd. This means that our nested guest will not be able to use runtime
instrumentation. Also, a memory leak, if our KVM guest actually sets gvrd.

Not noticed until now, as KVM guests never make use of gvrd and runtime
instrumentation wasn't completely tested yet.

Reported-by: Fan Zhang <zhangfan@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
David Hildenbrand 2016-09-02 12:33:49 +02:00 committed by Cornelia Huck
parent 20b8f9e2dd
commit 4d21cef3ea
1 changed files with 1 additions and 1 deletions
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2
arch/s390/kvm/vsie.c
View File

@ -584,7 +584,7 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
/* Validity 0x0044 will be checked by SIE */
if (rc)
goto unpin;
scb_s->gvrd = hpa;
scb_s->riccbd = hpa;
}
return 0;
unpin: