# # requires: arch=amd64 -threaded # r0 = openat$kvm(0, &AUTO='/dev/kvm\x00', 0x0, 0x0) r1 = ioctl$KVM_CREATE_VM(r0, AUTO, 0x0) r2 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil) # Perform two uexits. The first one is done via a code blob: # 4831ff xor rdi,rdi # 48c7c600000400 mov rsi,0x40000 # 4881c600010000 add rsi,0x100 # 48893e mov QWORD PTR [rsi],rdi # The second uexit is done via a syzos API command that sets uexit exit code to 0xaaaa. # r3 = syz_kvm_add_vcpu$x86(r2, &AUTO={0x0, &AUTO=[@code={AUTO, AUTO, {"4831ff48c7c6000004004881c60001000048893e", 0xc3}}, @uexit={AUTO, AUTO, 0xaaaa}], AUTO}) r4 = ioctl$KVM_GET_VCPU_MMAP_SIZE(r0, AUTO) r5 = mmap$KVM_VCPU(&(0x7f0000009000/0x1000)=nil, r4, 0x3, 0x1, r3, 0x0) # Run till the first uexit. # ioctl$KVM_RUN(r3, AUTO, 0x0) syz_kvm_assert_syzos_uexit$x86(r3, r5, 0x0) # Run till the second uexit. # ioctl$KVM_RUN(r3, AUTO, 0x0) syz_kvm_assert_syzos_uexit$x86(r3, r5, 0xaaaa) # Run till the end of guest_main(). # ioctl$KVM_RUN(r3, AUTO, 0x0) # Ensure that exit reason is KVM_EXIT_MMIO and uexit code is UEXIT_END. # syz_kvm_assert_syzos_kvm_exit$x86(r5, 0x6) syz_kvm_assert_syzos_uexit$x86(r3, r5, 0xffffffffffffffff)