r0 = openat$nvram(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$tun(r0, &(0x7f00000016c0)={@val, @val, @ipv4=@gre={{0x5, 0x4, 0x0, 0x0, 0x58, 0x0, 0x0, 0x0, 0x2f, 0x0, @empty, @dev}}}, 0x66)