Comment 0 for bug 1310598

Version:
14.04 Fresh Install.

$ uname -a
Linux alain-Desktop 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

AppArmor crashes with this stack trace:

PythonArgs: ['/usr/sbin/aa-status']
Traceback:
 Traceback (most recent call last):
   File "/usr/sbin/aa-status", line 194, in <module>
     commands[cmd]()
   File "/usr/sbin/aa-status", line 17, in cmd_enabled
     if get_profiles() == {}:
   File "/usr/sbin/aa-status", line 82, in get_profiles
     apparmorfs = find_apparmorfs()
   File "/usr/sbin/aa-status", line 137, in find_apparmorfs
     for p in open("/proc/mounts").readlines():
   File "/usr/lib/python3.4/encodings/ascii.py", line 26, in decode
     return codecs.ascii_decode(input, self.errors)[0]
 UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1200: ordinal not in range(128)

That is because I have a UTF-8 non-Ascii character in one of my mounts:
$ mount
/dev/sdb1 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)

(...)
/dev/sda6 on /home/alain/Vidéos type ext4 (rw,relatime,errors=remount-ro)
(...)

The Python code of aastatus near line 135 shows:

def find_apparmorfs():
    '''Finds AppArmor mount point'''
    for p in open("/proc/mounts").readlines():
        if p.split()[2] == "securityfs" and \
           os.path.exists(os.path.join(p.split()[1], "apparmor")):
            return os.path.join(p.split()[1], "apparmor")
    return False

So if I do:
$ cat /proc/mounts
rootfs / rootfs rw 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0

(...)
/dev/sda6 /home/alain/Vidéos ext4 rw,relatime,errors=remount-ro,data=ordered 0 0
(...)

There is indeed a line with a 'é'

UTF-8 code of the 'é' is 0xC3 0xA9

But apparently the call to .readlines() is set as ASCII and hence does NOT support the 0xC3 (first byte of the 'é' in UTF-8) and then it crashes.

I assume the solution could be to correctly read as UTF-8 as there are some non-Americans/English out there!

Sorry my knowledge of Python is just enough to understand the bug, and not enough to submit a patch.

Regards.
Alain