Bug 1473917 - Terminator may crash on 32bit systems due to invalid dbus-interface name
Terminator may crash on 32bit systems due to invalid dbus-interface name
Status: NEW
Product: Fedora
Classification: Fedora
Component: terminator (Show other bugs)
26
i686 Linux
unspecified Severity medium
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Assigned To: Dominic Hopf
Fedora Extras Quality Assurance
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Reported: 2017-07-22 07:49 EDT by Andreas Bleischwitz
Modified: 2017-07-22 08:00 EDT (History)
2 users (show)

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Attachments (Terms of Use)
Fix to avout output of hash() to be negative value (707 bytes, patch)
2017-07-22 07:49 EDT, Andreas Bleischwitz
no flags Details | Diff


External Trackers
Tracker ID Priority Status Summary Last Updated
Launchpad 1705816 None None None 2017-07-22 07:49 EDT

  None (edit)
Description Andreas Bleischwitz 2017-07-22 07:49:02 EDT
Created attachment 1302724 [details]
Fix to avout output of hash() to be negative value

Description of problem:
When starting terminator under a 32bit system it may crash due to an invalid dbus-interface name which is combined from a base and a hex-hash of the display. If the hash has a negative value, the hyphen is included in the name which is invalid. The hash value has to be a positive value at any time, which hash() does not ensure.

Version-Release number of selected component (if applicable):
terminator-1.91-2.fc26.noarch

How reproducible:
Install 'terminator' on a 32bit system, open a terminal and invoke 'terminator'. Depending on the hash() of your display-session you may be able to start terminator or it fails with a complaint about an invalid DBus interface name.

Steps to Reproduce:
1. on Fedora-26.i686, install terminator-1.91-2.fc26.noarch
2. wayland-session, start 'termininator' from console
3. 'terminator' may or may not crash - in relation to the value of Gdk.get_display().partition('.')[0]

Actual results:
Terminator does crash on start

Expected results:
Terminator does not crash

Additional info:
Comment 1 Andreas Bleischwitz 2017-07-22 08:00:35 EDT
Output from terminator when hash() returns negative value:

Traceback (most recent call last):
  File "/usr/bin/terminator", line 83, in <module>
    from terminatorlib import ipc
  File "/usr/lib/python2.7/site-packages/terminatorlib/ipc.py", line 30, in <module>
    class DBusService(Borg, dbus.service.Object):
  File "/usr/lib/python2.7/site-packages/terminatorlib/ipc.py", line 61, in DBusService
    @dbus.service.method(BUS_NAME, in_signature='a{ss}')
  File "/usr/lib/python2.7/site-packages/dbus/decorators.py", line 155, in method
    validate_interface_name(dbus_interface)
ValueError: Invalid interface or error name 'net.tenshu.Terminator2-0x21012a2c': contains invalid character '-'

Checking line 61:
/usr/lib/python2.7/site-packages/terminatorlib/ipc.py:
     61     @dbus.service.method(BUS_NAME, in_signature='a{ss}')
     62     def new_window_cmdline(self, options=dbus.Dictionary()):

Fixed value of in_signature and variable BUS_NAME.

Checking line 30:
/usr/lib/python2.7/site-packages/terminatorlib/ipc.py:
     30 class DBusService(Borg, dbus.service.Object):
     31     """DBus Server class. This is implemented as a Borg"""

This is the instanciation of the DBus service.

Checking the origin of BUS_NAME:

     22 BUS_BASE = 'net.tenshu.Terminator2'
     23 BUS_PATH = '/net/tenshu/Terminator2'
     24 try:
     25     # Try and include the X11 display name in the dbus bus name
     26     DISPLAY  = hex(c_size_t(hash(Gdk.get_display().partition('.')[0])).value)
     27     BUS_NAME = '%s%s' % (BUS_BASE, DISPLAY)
     28 except:
     29     BUS_NAME = BUS_BASE

BUS_NAME is build from BUS_BASE (fixed) and DISPLAY - hex() of hash().
As DISPLAY is negative, and hex() does not introduce such negation, hash() is creating negative values.

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