Version-Release number of selected component:
mock-3.5-1.fc37

Additional info:
reporter:       libreport-2.17.4
cgroup:         0::/user.slice/user-1000.slice/user/app.slice/app-org.gnome.Terminal.slice/vte-spawn-e883274f-854d-48a3-9bca-2f95f96d7568.scope
cmdline:        /usr/bin/python3 -tt /usr/libexec/mock/mock -r ././fedora-37-new.cfg --init
crash_function: rmtree
exception_type: OSError
executable:     /usr/libexec/mock/mock
interpreter:    python3-3.11.0-1.fc37.x86_64
kernel:         6.0.12-300.fc37.x86_64
runlevel:       N 5
type:           Python3
uid:            0

Truncated backtrace:
file_util.py:67:rmtree:OSError: [Errno 16] Device or resource busy: '/var/lib/mock/fedora-37-x86_64/root/proc/filesystems'

Traceback (most recent call last):
  File "/usr/libexec/mock/mock", line 1087, in <module>
    exitStatus = main()
                 ^^^^^^
  File "/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py", line 93, in trace
    result = func(*args, **kw)
             ^^^^^^^^^^^^^^^^^
  File "/usr/libexec/mock/mock", line 847, in main
    result = run_command(options, args, config_opts, commands, buildroot, state)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py", line 93, in trace
    result = func(*args, **kw)
             ^^^^^^^^^^^^^^^^^
  File "/usr/libexec/mock/mock", line 874, in run_command
    commands.clean()
  File "/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py", line 93, in trace
    result = func(*args, **kw)
             ^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/mockbuild/backend.py", line 97, in clean
    self.buildroot.delete()
  File "/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py", line 93, in trace
    result = func(*args, **kw)
             ^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/mockbuild/buildroot.py", line 884, in delete
    file_util.rmtree(self.basedir, selinux=self.selinux)
  File "/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py", line 93, in trace
    result = func(*args, **kw)
             ^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/mockbuild/file_util.py", line 59, in rmtree
    rmtree(fullname, selinux=selinux, exclude=exclude)
  File "/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py", line 93, in trace
    result = func(*args, **kw)
             ^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/mockbuild/file_util.py", line 59, in rmtree
    rmtree(fullname, selinux=selinux, exclude=exclude)
  File "/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py", line 93, in trace
    result = func(*args, **kw)
             ^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/mockbuild/file_util.py", line 67, in rmtree
    os.remove(fullname)
OSError: [Errno 16] Device or resource busy: '/var/lib/mock/fedora-37-x86_64/root/proc/filesystems'

Local variables in innermost frame:
path: '/var/lib/mock/fedora-37-x86_64/root/proc'
selinux: False
exclude: ()
try_again: False
retries: 2
failed_to_handle: False
failed_filename: None
names: ['filesystems']
name: 'filesystems'
fullname: '/var/lib/mock/fedora-37-x86_64/root/proc/filesystems'
mode: 33060