SSH user activity fails sometimes

[landauermax]

Some of the SSH user state machines have the following error events in the sm.log files:

{"current_state": "ssh_executing_chain", "exception": "Traceback (most recent call last):\n File \"/opt/kyoushi/simulation/ait.beta_user/lib/python3.7/site-packages/cr_kyoushi/simulation/sm.py\", line 203, in execute_step\n self.execute_transition(log)\n File \"/opt/kyoushi/simulation/ait.beta_user/lib/python3.7/site-packages/cr_kyoushi/simulation/sm.py\", line 155, in execute_transition\n log, self.current_state, self.context\n File \"/opt/kyoushi/simulation/ait.beta_user/lib/python3.7/site-packages/cr_kyoushi/simulation/transitions.py\", line 144, in execute\n self.transition_function(log, current_state, context, self.target)\n File \"/opt/kyoushi/simulation/ait.beta_user/lib/python3.7/site-packages/cr_kyoushi/statemachines/ssh_user/actions.py\", line 261, in execute_command\n user.output = _receive(log, user.shell, expect)\n File \"/opt/kyoushi/simulation/ait.beta_user/lib/python3.7/site-packages/cr_kyoushi/statemachines/ssh_user/actions.py\", line 40, in _receive\n output_part = shell.recvS()\n File \"/opt/kyoushi/simulation/ait.beta_user/lib/python3.7/site-packages/pwnlib/tubes/tube.py\", line 1407, in wrapperS\n return packing._decode(func(self, *a, **kw))\n File \"/opt/kyoushi/simulation/ait.beta_user/lib/python3.7/site-packages/pwnlib/tubes/tube.py\", line 105, in recv\n return self._recv(numb, timeout) or b''\n File \"/opt/kyoushi/simulation/ait.beta_user/lib/python3.7/site-packages/pwnlib/tubes/tube.py\", line 183, in _recv\n if not self.buffer and not self._fillbuffer(timeout):\n File \"/opt/kyoushi/simulation/ait.beta_user/lib/python3.7/site-packages/pwnlib/tubes/tube.py\", line 154, in _fillbuffer\n data = self.recv_raw(self.buffer.get_fill_size())\n File \"/opt/kyoushi/simulation/ait.beta_user/lib/python3.7/site-packages/pwnlib/tubes/process.py\", line 686, in recv_raw\n raise EOFError\nEOFError", "level": "error", "message": "State machine execution failure", "run": "e0e7085b-7a37-4eb9-bad7-e64600b2d70e", "target": "ssh_sudo_check", "timestamp": 1641610053.623244, "transition": "ssh_exec_command", "transition_id": "dcb55624-4413-4896-bfb8-97f98912501d"}