Unhandled exception: FileNotFoundError: [Errno 2] No such file or directory: 'cgroup' with HWE kernels

[Stéphane Loeuillet]

Ubuntu focal with HWE kernel (Linux haproxy00-proxy-ovh 5.15.0-43-generic #46~20.04.1-Ubuntu SMP Thu Jul 14 15:20:17 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux)

```
ERROR: apport (pid 4411) Tue Aug 2 19:02:05 2022: called for pid 1246, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 4411) Tue Aug 2 19:02:05 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 4411) Tue Aug 2 19:02:05 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 4411) Tue Aug 2 19:02:05 2022: pid: 4411, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 4411) Tue Aug 2 19:02:05 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 17639) Thu Aug 4 16:47:47 2022: called for pid 17107, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 17639) Thu Aug 4 16:47:47 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 17639) Thu Aug 4 16:47:47 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 17639) Thu Aug 4 16:47:47 2022: pid: 17639, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 17639) Thu Aug 4 16:47:47 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 133901) Tue Aug 16 12:33:50 2022: called for pid 133767, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 133901) Tue Aug 16 12:33:50 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 133901) Tue Aug 16 12:33:50 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 133901) Tue Aug 16 12:33:50 2022: pid: 133901, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 133901) Tue Aug 16 12:33:50 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 155335) Fri Aug 19 18:21:15 2022: called for pid 133910, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 155335) Fri Aug 19 18:21:15 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 155335) Fri Aug 19 18:21:15 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 155335) Fri Aug 19 18:21:15 2022: pid: 155335, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 155335) Fri Aug 19 18:21:15 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 156015) Fri Aug 19 21:01:02 2022: called for pid 155344, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 156015) Fri Aug 19 21:01:02 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 156015) Fri Aug 19 21:01:02 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 156015) Fri Aug 19 21:01:02 2022: pid: 156015, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 156015) Fri Aug 19 21:01:02 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 169278) Sun Aug 21 21:01:01 2022: called for pid 156024, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 169278) Sun Aug 21 21:01:01 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 169278) Sun Aug 21 21:01:01 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 169278) Sun Aug 21 21:01:01 2022: pid: 169278, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 169278) Sun Aug 21 21:01:01 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 178040) Tue Aug 23 03:59:15 2022: called for pid 169287, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 178040) Tue Aug 23 03:59:15 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 178040) Tue Aug 23 03:59:15 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 178040) Tue Aug 23 03:59:15 2022: pid: 178040, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 178040) Tue Aug 23 03:59:15 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 184064) Wed Aug 24 03:59:15 2022: called for pid 178049, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 184064) Wed Aug 24 03:59:15 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 184064) Wed Aug 24 03:59:15 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 184064) Wed Aug 24 03:59:15 2022: pid: 184064, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 184064) Wed Aug 24 03:59:15 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 208209) Sat Aug 27 18:48:30 2022: called for pid 184073, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 208209) Sat Aug 27 18:48:30 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 208209) Sat Aug 27 18:48:30 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 208209) Sat Aug 27 18:48:30 2022: pid: 208209, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 208209) Sat Aug 27 18:48:30 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 208360) Sat Aug 27 19:20:31 2022: called for pid 208218, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 208360) Sat Aug 27 19:20:31 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 208360) Sat Aug 27 19:20:31 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 208360) Sat Aug 27 19:20:31 2022: pid: 208360, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 208360) Sat Aug 27 19:20:31 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 209015) Sat Aug 27 21:39:25 2022: called for pid 208369, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 209015) Sat Aug 27 21:39:25 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 209015) Sat Aug 27 21:39:25 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 209015) Sat Aug 27 21:39:25 2022: pid: 209015, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 209015) Sat Aug 27 21:39:25 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 243217) Thu Sep 1 21:01:01 2022: called for pid 209024, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 243217) Thu Sep 1 21:01:01 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 243217) Thu Sep 1 21:01:01 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 243217) Thu Sep 1 21:01:01 2022: pid: 243217, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 243217) Thu Sep 1 21:01:01 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 276199) Sun Sep 4 21:01:03 2022: called for pid 243225, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 276199) Sun Sep 4 21:01:03 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 276199) Sun Sep 4 21:01:03 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 276199) Sun Sep 4 21:01:03 2022: pid: 276199, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 276199) Sun Sep 4 21:01:03 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 305913) Thu Sep 8 21:58:55 2022: called for pid 276207, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 305913) Thu Sep 8 21:58:55 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 305913) Thu Sep 8 21:58:55 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 305913) Thu Sep 8 21:58:55 2022: pid: 305913, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 305913) Thu Sep 8 21:58:55 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 337171) Tue Sep 13 17:07:35 2022: called for pid 305922, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 337171) Tue Sep 13 17:07:35 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 337171) Tue Sep 13 17:07:35 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 337171) Tue Sep 13 17:07:35 2022: pid: 337171, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 337171) Tue Sep 13 17:07:35 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 342853) Wed Sep 14 13:28:30 2022: called for pid 337180, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 342853) Wed Sep 14 13:28:30 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 342853) Wed Sep 14 13:28:30 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 342853) Wed Sep 14 13:28:30 2022: pid: 342853, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 342853) Wed Sep 14 13:28:30 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 347512) Wed Sep 14 21:01:01 2022: called for pid 346016, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 347512) Wed Sep 14 21:01:01 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 347512) Wed Sep 14 21:01:01 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 347512) Wed Sep 14 21:01:01 2022: pid: 347512, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 347512) Wed Sep 14 21:01:01 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 363794) Sat Sep 17 04:17:25 2022: called for pid 360935, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 363794) Sat Sep 17 04:17:25 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 363794) Sat Sep 17 04:17:25 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 363794) Sat Sep 17 04:17:25 2022: pid: 363794, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 363794) Sat Sep 17 04:17:25 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 368646) Sat Sep 17 21:01:05 2022: called for pid 363803, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 368646) Sat Sep 17 21:01:05 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 368646) Sat Sep 17 21:01:05 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 368646) Sat Sep 17 21:01:05 2022: pid: 368646, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 368646) Sat Sep 17 21:01:05 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 384699) Mon Sep 19 15:07:40 2022: called for pid 384095, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 384699) Mon Sep 19 15:07:40 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 384699) Mon Sep 19 15:07:40 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 384699) Mon Sep 19 15:07:40 2022: pid: 384699, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 384699) Mon Sep 19 15:07:40 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 386743) Mon Sep 19 23:11:35 2022: called for pid 384708, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 386743) Mon Sep 19 23:11:35 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 386743) Mon Sep 19 23:11:35 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 386743) Mon Sep 19 23:11:35 2022: pid: 386743, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 386743) Mon Sep 19 23:11:35 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 390987) Tue Sep 20 12:47:38 2022: called for pid 386753, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 390987) Tue Sep 20 12:47:38 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 390987) Tue Sep 20 12:47:38 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 390987) Tue Sep 20 12:47:38 2022: pid: 390987, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 390987) Tue Sep 20 12:47:38 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
ERROR: apport (pid 430837) Thu Sep 22 14:42:01 2022: called for pid 395266, signal 11, core limit 18446744073709551615, dump mode 1
ERROR: apport (pid 430837) Thu Sep 22 14:42:01 2022: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 430837) Thu Sep 22 14:42:01 2022: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 712, in <module>
    info.add_proc_info(proc_pid_fd=proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 649, in add_proc_info
    ret = self.get_logind_session(pid, proc_pid_fd)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 1777, in get_logind_session
    cgroup_file = os.open('cgroup', os.O_RDONLY, dir_fd=proc_pid_fd)
FileNotFoundError: [Errno 2] No such file or directory: 'cgroup'
ERROR: apport (pid 430837) Thu Sep 22 14:42:01 2022: pid: 430837, uid: 0, gid: 0, euid: 64814, egid: 992
ERROR: apport (pid 430837) Thu Sep 22 14:42:01 2022: environment: environ({'LC_CTYPE': 'C.UTF-8'})
```

[Stéphane Loeuillet (leroutier)]

apport crashes started on 2022-08-02, the day I rebooted to HWE 5.15 kernel
was working with 5.4.0

[Benjamin Drung (bdrung)]

Checked upstream apport. get_logind_session is still unchanged and therefore affected as well.

To correctly fix that: Is cgroup disabled? Is there a login session running?

[Stéphane Loeuillet (leroutier)]

root@haproxy00-proxy-ovh:~# find /proc/430844 /proc/430846 |egrep cgroup
/proc/430844/task/430844/ns/cgroup
/proc/430844/task/430844/cgroup
/proc/430844/ns/cgroup
/proc/430844/cgroup
/proc/430846/task/430846/ns/cgroup
/proc/430846/task/430846/cgroup
/proc/430846/task/430847/ns/cgroup
/proc/430846/task/430847/cgroup
/proc/430846/task/430848/ns/cgroup
/proc/430846/task/430848/cgroup
/proc/430846/task/430849/ns/cgroup
/proc/430846/task/430849/cgroup
/proc/430846/task/430850/ns/cgroup
/proc/430846/task/430850/cgroup
/proc/430846/task/430851/ns/cgroup
/proc/430846/task/430851/cgroup
/proc/430846/task/430852/ns/cgroup
/proc/430846/task/430852/cgroup
/proc/430846/task/430853/ns/cgroup
/proc/430846/task/430853/cgroup
/proc/430846/ns/cgroup
/proc/430846/cgroup

So, cgroups are not disabled

BOOT_IMAGE=/boot/vmlinuz-5.15.0-43-generic root=/dev/md2 ro crashkernel=auto ipv6.disable=1 mitigations=off transparent_hugepage=never processor.max_cstate=1 intel_idle.max_cstate=0 clocksource=tsc tsc=reliable console=tty1 console=ttyS0 modprobe.blacklist=btrfs

For login session running, I have no clue.
That's on a server, no one was connected on the console or via SSH during the crash (no human)

[Stéphane Loeuillet (leroutier)]

systemd 245.4-4ubuntu3.17
systemd-logind.service running but service that did crash (haproxy) was not running via interactive session

[Benjamin Drung (bdrung)]

Catch FileNotFoundError: https://github.com/canonical/apport/pull/7

This does not explain why /proc/<pid>/cgroup is not present.

[Benjamin Drung (bdrung)]

Can you check if the currently running haproxy has /proc/<pid>/cgroup?

[Stéphane Loeuillet (leroutier)]

In comment #3, I did do a find /proc/#haproxy_pids | grep cgroup

[Stéphane Loeuillet (leroutier)]

root@haproxy00-proxy-ovh:/var/crash# cat /proc/430844/cgroup
13:cpu,cpuacct:/system.slice/haproxy.service
12:freezer:/
11:blkio:/system.slice/haproxy.service
10:memory:/system.slice/haproxy.service
9:misc:/
8:rdma:/
7:devices:/system.slice/haproxy.service
6:perf_event:/
5:pids:/system.slice/haproxy.service
4:net_cls,net_prio:/
3:cpuset:/
2:hugetlb:/
1:name=systemd:/system.slice/haproxy.service
0::/system.slice/haproxy.service

root@haproxy00-proxy-ovh:/var/crash# cat /proc/430846/cgroup
13:cpu,cpuacct:/system.slice/haproxy.service
12:freezer:/
11:blkio:/system.slice/haproxy.service
10:memory:/system.slice/haproxy.service
9:misc:/
8:rdma:/
7:devices:/system.slice/haproxy.service
6:perf_event:/
5:pids:/system.slice/haproxy.service
4:net_cls,net_prio:/
3:cpuset:/
2:hugetlb:/
1:name=systemd:/system.slice/haproxy.service
0::/system.slice/haproxy.service

[Benjamin Drung (bdrung)]

Then I cannot explain why apport crashed with FileNotFoundError.

Can you add some debugging to apport/report.py in get_logind_session() to print the directory information at that point and then try to trigger the crash again?

if proc_pid_fd:
    p = f"/proc/self/fd/{proc_pid_fd}"
    apport.logging.error("Directory path: %s", os.readlink(p))
    apport.logging.error("Directory content: %s", os.listdir(p))

[Stéphane Loeuillet (leroutier)]

Did apport.logging exist in the version on Focal ?
I see no use of it inside the apport python dir

[Stéphane Loeuillet (leroutier)]

I did take the apport/logging.py file, dumped it there and imported it in that file

If i make python3 crash via buggy code or if I kill -11 a process, it works and gives you the data you want/expect.

One thing specific to my haproxy : it runs as a systemd dynamic user :
DynamicUser=yes

Could it matter ?

[Stéphane Loeuillet (leroutier)]

Even if we don't know the root cause, could you protect the following code (function called in same file) with try/catch ?

        ret = self.get_logind_session(pid, proc_pid_fd)
        if ret:
            self['_LogindSession'] = ret[0]

[Benjamin Drung (bdrung)]

Oh, right. In focal it is just "apport" instead of "apport.logging":

if proc_pid_fd:
    p = f"/proc/self/fd/{proc_pid_fd}"
    apport.error("Directory path: %s", os.readlink(p))
    apport.error("Directory content: %s", os.listdir(p))

The protection would look like this if you want to record the failure in the report:

        try:
            ret = self.get_logind_session(pid, proc_pid_fd)
            if ret:
                self["_LogindSession"] = ret[0]
        except OSError as error:
            self["_LogindSessionFailed"] = str(error)

[Benjamin Drung (bdrung)]

I tried to reproduce this kind of failure:

* Download ubuntu-20.04.5-live-server-amd64.iso
* Install Ubuntu 20.04 server in a VM
* sudo apt install haproxy linux-image-5.15.0-43-generic
* Reboot into 5.15.0-43
* "systemctl status haproxy" -> get $pid
* sudo kill -11 $pid

I checked /var/log/apport.log. It looks like it should and /var/crash/_usr_sbin_haproxy.0.crash is correctly created.

[Launchpad Janitor (janitor)]

[Expired for apport (Ubuntu) because there has been no activity for 60 days.]