+++ This bug was initially created as a clone of Bug #965370 +++

Version-Release number of selected component:
gdm-3.8.1.1-3.fc19

Additional info:
reporter:       libreport-2.1.4
backtrace_rating: 4
cmdline:        'gdm-session-worker [pam/gdm-password]'
crash_function: act_user_is_loaded
executable:     /usr/libexec/gdm-session-worker
kernel:         3.9.2-301.fc19.x86_64
runlevel:       N 5
uid:            0
var_log_messages: May 20 18:00:07 vinesh-teotia abrt[7166]: Saved core dump of pid 7163 (/usr/libexec/gdm-session-worker) to /var/tmp/abrt/ccpp-2013-05-20-18:00:06-7163 (18575360 bytes)

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 act_user_is_loaded at act-user.c:1463
 #1 gdm_session_settings_load at gdm-session-settings.c:321
 #2 attempt_to_load_user_settings at gdm-session-worker.c:618
 #3 gdm_session_worker_update_username at gdm-session-worker.c:659
 #4 gdm_session_worker_process_pam_message at gdm-session-worker.c:756
 #5 gdm_session_worker_pam_new_messages_handler at gdm-session-worker.c:849
 #6 pam_vprompt at pam_vprompt.c:83
 #7 pam_prompt at pam_vprompt.c:111
 #8 _unix_read_password at support.c:825
 #9 pam_sm_authenticate at pam_unix_auth.c:160

--- Additional comment from vineshteotia on 20130521T03:52:28 ---

Created attachment 750829 [details]
File: backtrace

--- Additional comment from vineshteotia on 20130521T03:52:33 ---

Created attachment 750830 [details]
File: cgroup

--- Additional comment from vineshteotia on 20130521T03:52:36 ---

Created attachment 750831 [details]
File: core_backtrace

--- Additional comment from vineshteotia on 20130521T03:52:41 ---

Created attachment 750832 [details]
File: dso_list

--- Additional comment from vineshteotia on 20130521T03:52:45 ---

Created attachment 750833 [details]
File: environ

--- Additional comment from vineshteotia on 20130521T03:52:50 ---

Created attachment 750834 [details]
File: limits

--- Additional comment from vineshteotia on 20130521T03:52:54 ---

Created attachment 750835 [details]
File: maps

--- Additional comment from vineshteotia on 20130521T03:53:02 ---

Created attachment 750836 [details]
File: open_fds

--- Additional comment from vineshteotia on 20130521T03:53:06 ---

Created attachment 750837 [details]
File: proc_pid_status

--- Additional comment from jay.finger on 20131008T15:50:07 ---

I was just mucking around with dropbox from inside chrome, 

reporter:       libreport-2.1.7
backtrace_rating: 4
cmdline:        'gdm-session-worker [pam/gdm-password]'
crash_function: act_user_is_loaded
executable:     /usr/libexec/gdm-session-worker
kernel:         3.11.3-201.fc19.x86_64
package:        gdm-3.8.4-2.fc19
reason:         Process /usr/libexec/gdm-session-worker was killed by signal 11 (SIGSEGV)
runlevel:       N 5
type:           CCpp
uid:            0

--- Additional comment from mclasen on 20140108T00:43:08 ---

Looks like gdm_session_worker_update_username passes any non-NULL username down to gdm_session_settings_load, which in turn calls act_user_manager_get_user with that name. 

But act_user_manager_get_user rejects the empty string as invalid argument, and returns NULL. Things go downhill from there.