diff options
| author | Halil Pasic | 2023-02-09 00:00:22 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-03-10 09:33:02 +0100 |
| commit | 19e29653c83254211732294d1e3b2b74fcac74d5 (patch) | |
| tree | c3a3b779a03ea99cef674cd21b912989e10c6c41 /drivers | |
| parent | 8f36f6e5770e059d321e06318b35a2256e042ddb (diff) | |
s390: vfio-ap: tighten the NIB validity check
[ Upstream commit a64a6d23874c574d30a9816124b2dc37467f3811 ]
The NIB is architecturally invalid if the address designates a
storage location that is not installed or if it is zero.
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Reported-by: Janosch Frank <frankja@linux.ibm.com>
Fixes: ec89b55e3bce ("s390: ap: implement PAPQ AQIC interception in kernel")
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/crypto/vfio_ap_ops.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index a109c59f18f7..934515959ebf 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -349,6 +349,8 @@ static int vfio_ap_validate_nib(struct kvm_vcpu *vcpu, dma_addr_t *nib) { *nib = vcpu->run->s.regs.gprs[2]; + if (!*nib) + return -EINVAL; if (kvm_is_error_hva(gfn_to_hva(vcpu->kvm, *nib >> PAGE_SHIFT))) return -EINVAL; |