github.com/google/syzkaller@v0.0.0-20251211124644-a066d2bc4b02/sys/linux/test/arm64-syz_kvm_setup_syzos_vm-memwrite (about)

     1  #
     2  # requires: arch=arm64 -threaded
     3  #
     4  r0 = openat$kvm(0, &AUTO='/dev/kvm\x00', 0x0, 0x0)
     5  r1 = ioctl$KVM_CREATE_VM(r0, AUTO, 0x0)
     6  r2 = syz_kvm_setup_syzos_vm$arm64(r1, &(0x7f0000c00000/0x400000)=nil)
     7  # Emulate a uexit with the memwrite API command: write 0 at address ARM64_ADDR_UEXIT.
     8  #
     9  r3 = syz_kvm_add_vcpu$arm64(r2, &AUTO={0x0, &AUTO=[@memwrite={AUTO, AUTO, @generic={0xdddd0000, 0x100, 0x0, 0x8}}], AUTO}, 0x0, 0x0)
    10  
    11  r4 = ioctl$KVM_GET_VCPU_MMAP_SIZE(r0, AUTO)
    12  r5 = mmap$KVM_VCPU(&(0x7f0000009000/0x1000)=nil, r4, 0x3, 0x1, r3, 0x0)
    13  # Run till the emulated uexit.
    14  #
    15  ioctl$KVM_RUN(r3, AUTO, 0x0)
    16  syz_kvm_assert_syzos_uexit$arm64(r5, 0x0)
    17  # Run till the end of guest_main(). 0xffffffffffffffff is UEXIT_END.
    18  #
    19  ioctl$KVM_RUN(r3, AUTO, 0x0)
    20  syz_kvm_assert_syzos_uexit$arm64(r5, 0xffffffffffffffff)