[Bug 1700468] Re: "krb5-auth-dialog --auto" segfaults on startup

2017-07-07 Thread Launchpad Bug Tracker 
This bug was fixed in the package krb5-auth-dialog - 3.20.0-3

---
krb5-auth-dialog (3.20.0-3) unstable; urgency=medium

  * [5a7fe1c] Don't depend on unused libnm-glib-dev (Closes: #823568)
  * [1455a30] credentials_expiring_real: check if kcontext is valid
(LP: #1700468)
  * [2593f51] Bump standards version to 4.0.0
  * [cc2b1c0] Bump standards version to 3.9.8
  * [083647b] Switch to debhelper 10
  * [f92d782] Use https vcs urls.

 -- Guido Günther   Fri, 07 Jul 2017 10:11:16 +0200

** Changed in: krb5-auth-dialog (Ubuntu)
   Status: New => Fix Released

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  "krb5-auth-dialog --auto" segfaults on startup

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[Bug 1700468] Re: "krb5-auth-dialog --auto" segfaults on startup

2017-07-07 Thread Daniel Richard G. 
Confirmed that this fixes the segfault for me when applied to version
3.20.0. Thanks :)

(Figured this would be easy to reproduce...)

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Re: [Bug 1700468] Re: "krb5-auth-dialog --auto" segfaults on startup

2017-07-07 Thread Guido Günther 
On Thu, Jul 06, 2017 at 08:33:06PM -, Daniel Richard G. wrote:
> Er...
> 
> $ klist -v
> klist: invalid option -- 'v'
> Usage: klist [-e] [-V] [[-c] [-l] [-A] [-d] [-f] [-s] [-a [-n]]] [-k [-t] 
> [-K]] [name]
> [...]
> 
> Remember, the segfault occurs with a user that is local-only. Kerberos
> infrastructure is installed on the system, but the user has no Kerberos
> tickets, no Kerberos envvars set, no cache file, nothing at all.
> 
> $ klist
> klist: Credentials cache file '/tmp/krb5cc_1000' not found

I can reproduce this now and this

https://git.gnome.org/browse/krb5-auth-
dialog/commit/?id=23ba826890d60c3c556a8d1a021e97b8d3fb416c

fixes it for me.

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[Bug 1700468] Re: "krb5-auth-dialog --auto" segfaults on startup

2017-07-06 Thread Daniel Richard G. 
Er...

$ klist -v
klist: invalid option -- 'v'
Usage: klist [-e] [-V] [[-c] [-l] [-A] [-d] [-f] [-s] [-a [-n]]] [-k [-t] 
[-K]] [name]
[...]

Remember, the segfault occurs with a user that is local-only. Kerberos
infrastructure is installed on the system, but the user has no Kerberos
tickets, no Kerberos envvars set, no cache file, nothing at all.

$ klist
klist: Credentials cache file '/tmp/krb5cc_1000' not found

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Re: [Bug 1700468] Re: "krb5-auth-dialog --auto" segfaults on startup

2017-07-06 Thread Guido Günther 
Hi Daniel,
On Wed, Jul 05, 2017 at 10:38:35PM -, Daniel Richard G. wrote:
> Hi Guido, I think you mean "klist -V" (uppercase) :-)
> 
> On the system in question, that returns
> 
> $ klist -V
> Kerberos 5 version 1.13.2

Thath's useful too but I meant "klist -v" to get your ticket details.

> 
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> 
> Title:
>   "krb5-auth-dialog --auto" segfaults on startup
> 
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[Bug 1700468] Re: "krb5-auth-dialog --auto" segfaults on startup

2017-07-05 Thread Daniel Richard G. 
Hi Guido, I think you mean "klist -V" (uppercase) :-)

On the system in question, that returns

$ klist -V
Kerberos 5 version 1.13.2

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Re: [Bug 1700468] Re: "krb5-auth-dialog --auto" segfaults on startup

2017-07-03 Thread Guido Günther 
Hi Daniel,
On Fri, Jun 30, 2017 at 04:39:15AM -, Daniel Richard G. wrote:
> Attached is a Valgrind log file produced from a debug build of k-a-d
> version 3.20.0.
> 
> All the errors appear to be accesses within freed memory...

Yeah that look suspicious. Can you either post (or send via private
mail) the output of "klist -v"?

> 
> ** Attachment added: "kad-valgrind-log.txt"
>
> https://bugs.launchpad.net/ubuntu/+source/krb5-auth-dialog/+bug/1700468/+attachment/4906188/+files/kad-valgrind-log.txt
> 
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> Title:
>   "krb5-auth-dialog --auto" segfaults on startup
> 
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[Bug 1700468] Re: "krb5-auth-dialog --auto" segfaults on startup

2017-06-29 Thread Daniel Richard G. 
Attached is a Valgrind log file produced from a debug build of k-a-d
version 3.20.0.

All the errors appear to be accesses within freed memory...

** Attachment added: "kad-valgrind-log.txt"
   
https://bugs.launchpad.net/ubuntu/+source/krb5-auth-dialog/+bug/1700468/+attachment/4906188/+files/kad-valgrind-log.txt

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Re: [Bug 1700468] Re: "krb5-auth-dialog --auto" segfaults on startup

2017-06-29 Thread Guido Günther 
On Tue, Jun 27, 2017 at 07:49:07PM -, Daniel Richard G. wrote:
> Hunh. How odd... I can't imagine that there would be something
> particular to this system that is causing the crash. As you requested:
> 
> skunk@darkstar:/tmp/krb5-auth-dialog-3.20.0/_build/src$ G_MESSAGES_DEBUG=all 
> ./krb5-auth-dialog -a
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> principal: 
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> pk-userid: 
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> pk-anchors: 
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> pw-prompt-mins: 30
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> tgt-forwardable: False
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> tgt-proxiable: False
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> tgt-renewable: False
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> conf-tickets: False
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> principal: 
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> pk-userid: 
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> pk-anchors: 
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> pw-prompt-mins: 30
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> tgt-forwardable: False
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> tgt-proxiable: False
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> tgt-renewable: False
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
> conf-tickets: False
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_local_command_line: 
> Parsing local command line
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_startup: Primary 
> application
> (krb5-auth-dialog:16500): Gtk-DEBUG: Connecting to session manager
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_nm_client_state_changed_cb: 
> Network connected
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: monitor_ccache: Monitoring 
> /tmp/krb5cc_1000
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_command_line: 
> Evaluating command line
> (krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: credentials_expiring: Checking 
> expiry <1800s

That looks sane.

> Segmentation fault (core dumped)

That still doesn't. Does running under valgrind's memcheck yield
anything?

valgrind /usr/bin/krb5-auth-dialog

It might make sense to either build with debugging symbpols or install
the distro's krb5-auth-dialog-dbsym package.
Cheers,
 -- Guido

> 
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[Bug 1700468] Re: "krb5-auth-dialog --auto" segfaults on startup

2017-06-27 Thread Daniel Richard G. 
Hunh. How odd... I can't imagine that there would be something
particular to this system that is causing the crash. As you requested:

skunk@darkstar:/tmp/krb5-auth-dialog-3.20.0/_build/src$ G_MESSAGES_DEBUG=all 
./krb5-auth-dialog -a
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
principal: 
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
pk-userid: 
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
pk-anchors: 
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
pw-prompt-mins: 30
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
tgt-forwardable: False
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
tgt-proxiable: False
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
tgt-renewable: False
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
conf-tickets: False
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
principal: 
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
pk-userid: 
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
pk-anchors: 
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
pw-prompt-mins: 30
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
tgt-forwardable: False
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
tgt-proxiable: False
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
tgt-renewable: False
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_set_property: 
conf-tickets: False
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_local_command_line: 
Parsing local command line
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_startup: Primary 
application
(krb5-auth-dialog:16500): Gtk-DEBUG: Connecting to session manager
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_nm_client_state_changed_cb: 
Network connected
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: monitor_ccache: Monitoring 
/tmp/krb5cc_1000
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: ka_applet_command_line: 
Evaluating command line
(krb5-auth-dialog:16500): KrbAuthDialog-DEBUG: credentials_expiring: Checking 
expiry <1800s
Segmentation fault (core dumped)

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Title:
  "krb5-auth-dialog --auto" segfaults on startup

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[Bug 1700468] Re: "krb5-auth-dialog --auto" segfaults on startup

2017-06-27 Thread Guido Günther 
I can't reproduce here neither when linked against MIT (as in Debian)
nor against heimdal (as in Xenial). Can you do a

G_MESSAGES_DEBUG=all ./src/krb5-auth-dialog -a

maybe this shows s.th. interesting before the crash.

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[Bug 1700468] Re: "krb5-auth-dialog --auto" segfaults on startup

2017-06-26 Thread Daniel Richard G. 
I'm afraid I see the same failure mode with 3.20. The GDB session is
below.

(You're not able to reproduce this? This is a system with all the
Kerberos infrastructure, but a local-only user---no KRB* envvars set)


$ gdb --args /tmp/krb5-auth-dialog-3.20.0/_build/src/krb5-auth-dialog --auto
GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.04) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later 
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
.
Find the GDB manual and other documentation resources online at:
.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from 
/tmp/krb5-auth-dialog-3.20.0/_build/src/krb5-auth-dialog...done.
(gdb) r
Starting program: /tmp/krb5-auth-dialog-3.20.0/_build/src/krb5-auth-dialog 
--auto
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe9bf6700 (LWP 5105)]
[New Thread 0x7fffe93f5700 (LWP 5106)]
[New Thread 0x7fffe895a700 (LWP 5107)]
[New Thread 0x7fffdbdb9700 (LWP 5108)]

Thread 1 "krb5-auth-dialo" received signal SIGSEGV, Segmentation fault.
0x77928b8f in krb5_cc_resolve (context=0x99df40, 
name=0x95a130 "Broadway", id=0x7fffda90) at cache.c:270
270 cache.c: No such file or directory.
(gdb) bt
#0  0x77928b8f in krb5_cc_resolve (context=0x99df40, 
name=0x95a130 "Broadway", id=0x7fffda90) at cache.c:270
#1  0x00409aae in ka_get_tgt_from_ccache (context=0x99df40, 
creds=0x7fffdb90) at ../../src/ka-kerberos.c:897
#2  0x0040804c in credentials_expiring_real (applet=0x6c7190)
at ../../src/ka-kerberos.c:227
#3  0x00408c2e in credentials_expiring (data=0x6c7190)
at ../../src/ka-kerberos.c:531
#4  0x00408cc7 in credentials_expiring_once (data=0x6c7190)
at ../../src/ka-kerberos.c:547
#5  0x7604e04a in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x7604e3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x7604e49c in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x76615e30 in g_application_run ()
   from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#9  0x0040cd28 in main (argc=2, argv=0x7fffdf18)
at ../../src/ka-applet.c:1252
(gdb) up
#1  0x00409aae in ka_get_tgt_from_ccache (context=0x99df40, 
creds=0x7fffdb90) at ../../src/ka-kerberos.c:897
897 if (krb5_cc_default (context, ))
(gdb) p kcontext_valid
$1 = 0
(gdb)

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  "krb5-auth-dialog --auto" segfaults on startup

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[Bug 1700468] Re: "krb5-auth-dialog --auto" segfaults on startup

2017-06-26 Thread Guido Günther 
But it seems ka_krb5_context_init got called (you can check
kcontext_valid == TRUE) so in this case it got corrupted. Any chance you
can check 3.20?

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