Comment 3 for bug 1932523

Thank you for your bug report.

I can confirm this bug. Here are the steps to reproduce it:

# lxc launch images:ubuntu/focal iotop-bug1932523
# lxc shell iotop-bug1932523
$ apt update && apt install -y iotop gcc
$ echo -e '#include <unistd.h>\nint main(){sleep(1000);return 0;}' | gcc -x c -o 'Инстанц�' -
$ ./Инстанц�
## <Type Control-Z here to put the program in the backgroun>
$ iotop
Traceback (most recent call last):
  File "/usr/sbin/iotop", line 17, in <module>
    main()
  File "/usr/lib/python3/dist-packages/iotop/ui.py", line 737, in main
    main_loop()
  File "/usr/lib/python3/dist-packages/iotop/ui.py", line 727, in <lambda>
    main_loop = lambda: run_iotop(options)
  File "/usr/lib/python3/dist-packages/iotop/ui.py", line 620, in run_iotop
    return curses.wrapper(run_iotop_window, options)
  File "/usr/lib/python3.8/curses/__init__.py", line 105, in wrapper
    return func(stdscr, *args, **kwds)
  File "/usr/lib/python3/dist-packages/iotop/ui.py", line 612, in run_iotop_window
    ui.run()
  File "/usr/lib/python3/dist-packages/iotop/ui.py", line 188, in run
    self.refresh_display(iterations == 0, total, current,
  File "/usr/lib/python3/dist-packages/iotop/ui.py", line 476, in refresh_display
    lines = self.get_data()
  File "/usr/lib/python3/dist-packages/iotop/ui.py", line 457, in get_data
    return list(map(format, processes))
  File "/usr/lib/python3/dist-packages/iotop/ui.py", line 432, in format
    cmdline = p.get_cmdline()
  File "/usr/lib/python3/dist-packages/iotop/data.py", line 308, in get_cmdline
    proc_status = parse_proc_pid_status(self.pid)
  File "/usr/lib/python3/dist-packages/iotop/data.py", line 210, in parse_proc_pid_status
    for line in open('/proc/%d/status' % pid):
  File "/usr/lib/python3.8/codecs.py", line 322, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xef in position 20: invalid continuation byte

I was able to verify that this bug still happens on impish, using a recent version of iotop (0.6-24-g733f3f8-1.1).

@Mingun, I think the best course of action for this bug is to contact upstream and suggest the patch to them first. Woud you be willing to do that, please?

Thank you.