r0 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./file1\x00', 0x145d42, 0x0)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000140)={<r1=>0xffffffffffffffff})
mount$9p_fd(0x0, &(0x7f0000000240)='./file1\x00', &(0x7f0000000280), 0x0, &(0x7f0000001780)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}})