As the IO Instruction format defines, the first 32 bits have to be ignored.
This fixes a bug, when the guest don't clear the first 32 bits and the host then tries to interpret this. Cc: [email protected] Signed-off-by: Dominik Dingel <[email protected]> --- arch/s390/kvm/diag.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/s390/kvm/diag.c b/arch/s390/kvm/diag.c index 4ad0336..213fccf 100644 --- a/arch/s390/kvm/diag.c +++ b/arch/s390/kvm/diag.c @@ -206,7 +206,8 @@ static int __diag_virtio_hypercall(struct kvm_vcpu *vcpu) * - gpr 4 contains the index on the bus (optionally) */ ret = kvm_io_bus_write_cookie(vcpu->kvm, KVM_VIRTIO_CCW_NOTIFY_BUS, - vcpu->run->s.regs.gprs[2], + vcpu->run->s.regs.gprs[2] & + 0x00000000ffffffff, 8, &vcpu->run->s.regs.gprs[3], vcpu->run->s.regs.gprs[4]); -- 1.8.3.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
