Kernel: Remove SmapDisabler in sys$accept()

Kernel/Process.cpp

@@ -3157,13 +3157,14 @@ int Process::sys$listen(int sockfd, int backlog)
  return socket.listen(backlog);
 }
 
-int Process::sys$accept(int accepting_socket_fd, sockaddr* address, socklen_t* address_size)
+int Process::sys$accept(int accepting_socket_fd, sockaddr* user_address, socklen_t* user_address_size)
 {
  REQUIRE_PROMISE(accept);
- if (!validate_write_typed(address_size))
+ if (!validate_write_typed(user_address_size))
  return -EFAULT;
- SmapDisabler disabler;
- if (!validate_write(address, *address_size))
+ socklen_t address_size = 0;
+ copy_from_user(&address_size, user_address_size);
+ if (!validate_write(user_address, address_size))
  return -EFAULT;
  int accepted_socket_fd = alloc_fd();
  if (accepted_socket_fd < 0)
@@ -3184,7 +3185,13 @@ int Process::sys$accept(int accepting_socket_fd, sockaddr* address, socklen_t* a
  }
  auto accepted_socket = socket.accept();
  ASSERT(accepted_socket);
- accepted_socket->get_peer_address(address, address_size);
+
+ u8 address_buffer[sizeof(sockaddr_un)];
+ address_size = min(sizeof(sockaddr_un), static_cast<size_t>(address_size));
+ accepted_socket->get_peer_address((sockaddr*)address_buffer, &address_size);
+ copy_to_user(user_address, address_buffer, address_size);
+ copy_to_user(user_address_size, &address_size);
+
  auto accepted_socket_description = FileDescription::create(*accepted_socket);
  accepted_socket_description->set_readable(true);
  accepted_socket_description->set_writable(true);