vsmserver tries to check the environment of the process creating a session by digging around in /proc. It doesn't seem to handle failures though as I get this traceback when it goes wrong: > 2021-02-12 12:47:49 ERROR vsmserver.session: Unhandled exception trying to start new session for user1 on 127.0.0.1:904: <type 'exceptions.IOError'> [Errno 13] Permission denied: '/proc/3411/environ' Traceback (most recent call last): > File "/opt/thinlinc/modules/thinlinc/vsm/async.py", line 105, in i1Iii > obj . handle_read_event ( ) > File "/usr/lib64/python2.7/asyncore.py", line 449, in handle_read_event > self.handle_read() > File "/usr/lib64/python2.7/asynchat.py", line 147, in handle_read > self.found_terminator() > File "/opt/thinlinc/modules/thinlinc/vsm/xmlrpc.py", line 447, in found_terminator > self . handle_response ( ) > File "/opt/thinlinc/modules/thinlinc/vsm/xmlrpc.py", line 479, in handle_response > self . handle_returnvalue ( ) > File "/opt/thinlinc/modules/thinlinc/vsm/call_reqsession.py", line 43, in handle_returnvalue > self . callback ( self . returnvalue ) > File "/opt/thinlinc/modules/thinlinc/vsm/handler_newsession.py", line 196, in req_session_finished > self . handle_successful_sessionstart ( sessinfo ) > File "/opt/thinlinc/modules/thinlinc/vsm/handler_newsession.py", line 203, in handle_successful_sessionstart > sessinfo [ 'client_ip' ] = self . get_client_ip ( ) > File "/opt/thinlinc/modules/thinlinc/vsm/loginhandler_common.py", line 126, in get_client_ip > i11Iiii = open ( oo0oooooO0 , "r" ) > IOError: [Errno 13] Permission denied: '/proc/3411/environ' > . This happened in a test container and not in a real world scenario. Still, we shouldn't crash.