[Bug 1926298] Re: Segfault added in the recent changes

Sebastien Bacher 1926298 at bugs.launchpad.net
Fri Apr 30 09:17:39 UTC 2021

** Changed in: update-notifier (Ubuntu)
       Status: Confirmed => Fix Committed

** Changed in: update-notifier (Ubuntu Hirsute)
     Assignee: (unassigned) => Dan Bungert (dbungert)

** Changed in: update-notifier (Ubuntu Hirsute)
   Importance: Undecided => High

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  Segfault added in the recent changes

Status in update-notifier package in Ubuntu:
  Fix Committed
Status in update-notifier source package in Hirsute:

Bug description:

  On Hirsute/Impish, update-notifier can crash when attempting to run

  [Test Case]

  Create a file 'bug'

  'Name: bug
  Priority: Low
  Command: "/bin/true"
  DisplayIf: /bin/true
  Description: update notifier bug'

  and copy it to /var/lib/update-notifier/user.d

  [Where problems could occur]

  This is not the most absolute minimal version of this fix.
  If the minimal version of the fix is desired, I can provide that, which should be a +2/-2 diff.
  The fix changeset includes other glib usage improvements which sound good from a maintainability perspective and may even close other yet unknown bugs but add their own risk of regressions if said maintainability was not done correctly.

  [Original Bug Report Description]

  The issue is new using https://code.launchpad.net/~dbungert/update-
  notifier/+git/update-notifier/+merge/397367 , the previous revision
  didn't have the issue

  * Create a file 'bug'

  'Name: bug
  Priority: Low
  Command: "/bin/true"
  DisplayIf: /bin/true
  Description: update notifier bug'

  and copy it to /var/lib/update-notifier/user.d

  ->  update-notifier segfaults

  (gdb) bt
  #0  0x00007ffff718c769 in __GI___libc_free (mem=0x5550000aa7f9) at malloc.c:3288
  #1  0x00007ffff7365215 in g_strfreev (str_array=<optimized out>) at ../../../glib/gstrfuncs.c:2553
  #2  g_strfreev (str_array=0x5555555d9e00) at ../../../glib/gstrfuncs.c:2546
  #3  0x000055555555dd2d in hook_command_exists (cmd=0x555555702600 "\"/usr/bin/eog\"") at hooks.c:137
  #4  0x000055555555fd6e in is_hook_relevant (hook_file=0x555555829e7b "apt-file.update-notifier")
      at hooks.c:717
  #5  0x000055555555ffb1 in check_update_hooks (ta=0x5555556c9a20) at hooks.c:781
  #6  0x0000555555560715 in hook_tray_icon_init (ta=0x5555556c9a20) at hooks.c:969
  #7  0x000055555555cd77 in tray_icons_init (un=0x55555562c3e0,

  It seems likely to be the error on top of the weekly report for
  hirsute but that's missing a stacktrace

  One comment in addition on the change there, was the env split +
  iterate over pathdirs basically a re-implementation of
  Functions.html#g-find-program-in-path ? If there is particular reason
  to do that I would recommend just using the glib function instead
  (which might also fix the issue as a side effect, I didn't check)

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