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