we had no crashes of indicator-session in the last 12 days ** Tags removed: verification-needed ** Tags added: verification-done
-- You received this bug notification because you are a member of DX Packages, which is subscribed to indicator-session in Ubuntu. Matching subscriptions: dx-packages https://bugs.launchpad.net/bugs/1501244 Title: indicator-session sporadically segfaults if used with winbind Status in indicator-session package in Ubuntu: Fix Released Status in indicator-session source package in Trusty: Fix Committed Bug description: when looking into our pc pool with 44 machines, in around 2-5 sessions the System Menu is missing after a crash of indicator-session-service, making the users unable to log out using the mouse. There are arround 100 ubuntu machines for students with 32000 real users from an active directory. The users cannot see any users real name. I wasn't able to find the right debug symbols, but in the disassembly it looks like a crash in service.c:321 . In the attached crash dump the instruction pointer points to 0x4120a0 in memory, which should be the get_current_realname function. static const char * get_current_real_name (IndicatorSessionService * self) { GHashTableIter iter; gpointer key, value; /* is it the guest? */ if (indicator_session_guest_is_active (self->priv->backend_guest)) return _("Guest"); /* is it a user? */ g_hash_table_iter_init (&iter, self->priv->users); while (g_hash_table_iter_next (&iter, &key, &value)) { IndicatorSessionUser * user = value; if (user->is_current_user) // SEGFAULT PROBABLY HERE (movzx edx, byte ptr [r13]), r13=user ist NULL return get_user_label (user); } return ""; } The strange thing is: before inserting into the hashmap, every user is checked to be != NULL. So maybe I guessed the wrong function, or there are threading issues. Disassembly: 0x0000000000412081 <+1484>: mov r13,rax 0x0000000000412084 <+1487>: setne al 0x0000000000412087 <+1490>: test al,al 0x0000000000412089 <+1492>: je 0x411f56 <_start+1185> 0x000000000041208f <+1498>: jmp 0x411f51 <_start+1180> 0x0000000000412094 <+1503>: nop DWORD PTR [rax+0x0] 0x0000000000412098 <+1507>: mov r13,QWORD PTR [rdx+0x20] 0x000000000041209c <+1511>: mov rsi,QWORD PTR [rdx+0x18] => 0x00000000004120a0 <+1515>: movzx edx,BYTE PTR [r13+0x0] 0x00000000004120a5 <+1520>: test dl,dl 0x00000000004120a7 <+1522>: je 0x4120d6 <_start+1569> 0x00000000004120a9 <+1524>: mov rax,QWORD PTR [rip+0x248770] # 0x65a820 <g_ascii_table> 0x00000000004120b0 <+1531>: test BYTE PTR [rax+rdx*2+0x1],0x1 0x00000000004120b5 <+1536>: je 0x411f51 <_start+1180> 0x00000000004120bb <+1542>: mov rdx,r13 0x00000000004120be <+1545>: jmp 0x4120cb <_start+1558> Some command output: $> lsb_release -rd Description: Ubuntu 14.04.3 LTS Release: 14.04 Package version: $> dpkg -l | grep indicator-session ii indicator-session 12.10.5+14.04.20150404-0ubuntu1 amd64 indicator showing session management, status and user switching ~$> gsettings list-recursively com.canonical.indicator.session com.canonical.indicator.session show-real-name-on-panel false com.canonical.indicator.session suppress-logout-menuitem false com.canonical.indicator.session suppress-restart-menuitem false com.canonical.indicator.session suppress-shutdown-menuitem false com.canonical.indicator.session suppress-logout-restart-shutdown false com.canonical.indicator.session user-show-menu false ~$> wbinfo -u | wc -l 127390 iw18ejyg@cip-54-54: ~$> python -c 'print(__import__("pwd").getpwnam("iw18ejyg"))' pwd.struct_passwd(pw_name='iw18ejyg', pw_passwd='*', pw_uid=1069023, pw_gid=1000513, pw_gecos='', pw_dir='/home/stud/iw18ejyg', pw_shell='/bin/bash') To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/indicator-session/+bug/1501244/+subscriptions -- Mailing list: https://launchpad.net/~dx-packages Post to : dx-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~dx-packages More help : https://help.launchpad.net/ListHelp