/* * KVM_SET_SREGS tests * * Copyright (C) 2018, Google LLC. * * This work is licensed under the terms of the GNU GPL, version 2. * * This is a regression test for the bug fixed by the following commit: * d3802286fa0f ("kvm: x86: Disallow illegal IA32_APIC_BASE MSR values") * * That bug allowed a user-mode program that called the KVM_SET_SREGS * ioctl to put a VCPU's local APIC into an invalid state. * */ #define _GNU_SOURCE /* for program_invocation_short_name */ #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/ioctl.h> #include "test_util.h" #include "kvm_util.h" #include "x86.h" #define VCPU_ID 5 int main(int argc, char *argv[]) { struct kvm_sregs sregs; struct kvm_vm *vm; int rc; /* Tell stdout not to buffer its content */ setbuf(stdout, NULL); /* Create VM */ vm = vm_create_default(VCPU_ID, 0, NULL); vcpu_sregs_get(vm, VCPU_ID, &sregs); sregs.apic_base = 1 << 10; rc = _vcpu_sregs_set(vm, VCPU_ID, &sregs); TEST_ASSERT(rc, "Set IA32_APIC_BASE to %llx (invalid)", sregs.apic_base); sregs.apic_base = 1 << 11; rc = _vcpu_sregs_set(vm, VCPU_ID, &sregs); TEST_ASSERT(!rc, "Couldn't set IA32_APIC_BASE to %llx (valid)", sregs.apic_base); kvm_vm_free(vm); return 0; }