aa-logprof creates invalid regex for firefox{,*[^s][^h]}

Bug #1700416 reported by Buz Finork on 2017-06-25
This bug affects 1 person
Affects Status Importance Assigned to Milestone

Bug Description

I was working on profiling syncthing and syncthing-gtk.. and running aa-logprof got this error.. (not sure what went wrong)

Reading log entries from /var/log/syslog.
Updating AppArmor profiles in /etc/apparmor.d.
Traceback (most recent call last):
  File "/usr/sbin/aa-logprof", line 50, in <module>
  File "/usr/lib/python3/dist-packages/apparmor/aa.py", line 2200, in do_logprof_pass
  File "/usr/lib/python3/dist-packages/apparmor/aa.py", line 2451, in collapse_log
    if not is_known_rule(aa[profile][hat], 'ptrace', ptrace_event):
  File "/usr/lib/python3/dist-packages/apparmor/aa.py", line 4100, in is_known_rule
    if profile[rule_type].is_covered(rule_obj, False):
  File "/usr/lib/python3/dist-packages/apparmor/rule/__init__.py", line 363, in is_covered
    if r.is_covered(rule, check_allow_deny, check_audit):
  File "/usr/lib/python3/dist-packages/apparmor/rule/__init__.py", line 148, in is_covered
    return self.is_covered_localvars(other_rule)
  File "/usr/lib/python3/dist-packages/apparmor/rule/ptrace.py", line 141, in is_covered_localvars
    if not self._is_covered_aare(self.peer, self.all_peers, other_rule.peer, other_rule.all_peers, 'peer'):
  File "/usr/lib/python3/dist-packages/apparmor/rule/__init__.py", line 194, in _is_covered_aare
    if not self_value.match(other_value.regex): # XXX should check against other_value (without .regex) - but that gives different (more strict) results
  File "/usr/lib/python3/dist-packages/apparmor/aare.py", line 68, in match
    self._regex_compiled = re.compile(convert_regexp(self.regex))
  File "/usr/lib/python3.5/re.py", line 224, in compile
    return _compile(pattern, flags)
  File "/usr/lib/python3.5/re.py", line 293, in _compile
    p = sre_compile.compile(pattern, flags)
  File "/usr/lib/python3.5/sre_compile.py", line 536, in compile
    p = sre_parse.parse(p, flags)
  File "/usr/lib/python3.5/sre_parse.py", line 834, in parse
    raise source.error("unbalanced parenthesis")
sre_constants.error: unbalanced parenthesis at position 59

An unexpected error occoured!

For details, see /tmp/apparmor-bugreport-iwq9ml40.txt
Please consider reporting a bug at https://bugs.launchpad.net/apparmor/
and attach this file.

Buz Finork (m321v123m) wrote :

For details, see /tmp/apparmor-bugreport-iwq9ml40.txt

Christian Boltz (cboltz) wrote :

Thanks for the bugreport!

Looks like the profile name
gets miscompiled to an invalid regex.

Workaround: Change the profile to
    profile firefox /usr/lib/firefox/firefox{,*[^s][^h]}

tags: added: aa-tools
summary: - aa-logprof error
+ aa-logprof creates invalid regex for firefox{,*[^s][^h]}
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