mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-04 09:59:32 +00:00
Code Issues Releases Wiki Activity

KVM: s390: Return error on SIDA memop on normal guest

Browse source 
commit 2c212e1bae upstream.

Refuse SIDA memops on guests which are not protected.
For normal guests, the secure instruction data address designation,
which determines the location we access, is not under control of KVM.

Fixes: 19e1227768 (KVM: S390: protvirt: Introduce instruction data area bounce buffer)
Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Janis Schoetterl-Glausch 2022-01-28 15:06:43 +01:00 committed by Greg Kroah-Hartman
parent c28ee73fea
commit 14f880ea77
1 changed files with 2 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
arch/s390/kvm/kvm-s390.c
View file

@ -4708,6 +4708,8 @@ static long kvm_s390_guest_sida_op(struct kvm_vcpu *vcpu,
return -EINVAL;
if (mop->size + mop->sida_offset > sida_size(vcpu->arch.sie_block))
return -E2BIG;
if (!kvm_s390_pv_cpu_is_protected(vcpu))
return -EINVAL;
switch (mop->op) {
case KVM_S390_MEMOP_SIDA_READ: