fprintd fails to start through core-dump

[Vincent Gerris]

some more info :
feb 25 21:14:03 ubuntu-inspiron-5482 systemd[1]: fprintd.service: Main process exited, code=dumped, status=11/SEGV
░░ Subject: Unit process exited
░░ Defined-By: systemd
░░ Support: http://www.ubuntu.com/support
░░
░░ An ExecStart= process belonging to unit fprintd.service has exited.
░░
░░ The process' exit code is 'dumped' and its exit status is 11.
feb 25 21:14:03 ubuntu-inspiron-5482 systemd[1]: fprintd.service: Failed with result 'core-dump'.
░░ Subject: Unit failed
░░ Defined-By: systemd
░░ Support: http://www.ubuntu.com/support
░░
░░ The unit fprintd.service has entered the 'failed' state with result 'core-dump'.
feb 25 21:14:03 ubuntu-inspiron-5482 systemd[1]: Failed to start Fingerprint Authentication Daemon.
░░ Subject: A start job for unit fprintd.service has failed
░░ Defined-By: systemd
░░ Support: http://www.ubuntu.com/support
░░
░░ A start job for unit fprintd.service has finished with a failure.
░░
░░ The job identifier is 4596 and the job result is failed.
ubuntu@ubuntu-inspiron-5482:~$ dpkg -l fprintd
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-==============-============-============-==========================================
ii fprintd 1.94.2-1 amd64 D-Bus daemon for fingerprint reader access

if the fprintd package is installed and fprintd-enroll is run, it times out.
That triggers a bug in gdm3 at login, where the user account is not visibe and one cannot login.

I have a goodix fingerprint reader:
Bus 001 Device 002: ID 27c6:538c Shenzhen Goodix Technology Co.,Ltd. Fingerprint Reader

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: fprintd 1.94.2-1
Uname: Linux 5.12.19-051219-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia wl
ApportVersion: 2.20.11-0ubuntu78
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Fri Feb 25 21:19:31 2022
InstallationDate: Installed on 2019-12-17 (801 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
SourcePackage: fprintd
UpgradeStatus: No upgrade log present (probably fresh install)

[Vincent Gerris (vgerris)]

reference to login bug:
https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1960336

snippet from journalctl:
ubuntu@ubuntu-inspiron-5482:~$ journalctl -b 0 | grep fprintd
feb 25 21:09:27 ubuntu-inspiron-5482 sudo[12402]: ubuntu : TTY=pts/0 ; PWD=/home/ubuntu ; USER=root ; COMMAND=/usr/bin/apt install fprintd
feb 25 21:10:14 ubuntu-inspiron-5482 dbus-daemon[1737]: [system] Activating via systemd: service name='net.reactivated.Fprint' unit='fprintd.service' requested by ':1.153' (uid=1000 pid=12715 comm="fprintd-list ")
feb 25 21:10:15 ubuntu-inspiron-5482 kernel: fprintd[12718]: segfault at 40 ip 00007f96fd1b2056 sp 00007ffe9717a980 error 4 in libusb-1.0.so.0.3.0[7f96fd1a8000+f000]
feb 25 21:10:15 ubuntu-inspiron-5482 kernel: fprintd[12723]: segfault at 40 ip 00007f96fd1b2056 sp 00007f96f2ffca60 error 4 in libusb-1.0.so.0.3.0[7f96fd1a8000+f000]
feb 25 21:10:15 ubuntu-inspiron-5482 whoopsie-upload-all[12725]: INFO:root:Collecting info for /var/crash/_usr_libexec_fprintd.0.crash...
feb 25 21:10:16 ubuntu-inspiron-5482 systemd[1]: fprintd.service: Main process exited, code=dumped, status=11/SEGV
feb 25 21:10:16 ubuntu-inspiron-5482 systemd[1]: fprintd.service: Failed with result 'core-dump'.
feb 25 21:10:20 ubuntu-inspiron-5482 whoopsie-upload-all[12725]: INFO:root:Marking /var/crash/_usr_libexec_fprintd.0.crash for whoopsie upload
feb 25 21:10:20 ubuntu-inspiron-5482 whoopsie-upload-all[12725]: INFO:root: missing (remaining: 20 s): /var/crash/_usr_libexec_fprintd.0.uploaded /var/crash/_usr_libexec_tracker-miner-fs-3.1000.uploaded
feb 25 21:10:30 ubuntu-inspiron-5482 whoopsie-upload-all[12725]: INFO:root: missing (remaining: 10 s): /var/crash/_usr_libexec_fprintd.0.uploaded
feb 25 21:10:40 ubuntu-inspiron-5482 whoopsie-upload-all[12725]: INFO:root: missing (remaining: 0 s): /var/crash/_usr_libexec_fprintd.0.uploaded
feb 25 21:14:02 ubuntu-inspiron-5482 polkitd(authority=local)[1769]: Operator of unix-session:2 successfully authenticated as unix-user:root to gain TEMPORARY authorization for action org.freedesktop.systemd1.manage-units for system-bus-name::1.165 [systemctl restart fprintd.service] (owned by unix-user:ubuntu)
feb 25 21:14:03 ubuntu-inspiron-5482 kernel: fprintd[13512]: segfault at 40 ip 00007f49958e0056 sp 00007ffd6ef58100 error 4 in libusb-1.0.so.0.3.0[7f49958d6000+f000]
feb 25 21:14:03 ubuntu-inspiron-5482 systemd[1]: fprintd.service: Main process exited, code=dumped, status=11/SEGV
feb 25 21:14:03 ubuntu-inspiron-5482 systemd[1]: fprintd.service: Failed with result 'core-dump'.

possibly related:
https://bugs.launchpad.net/ubuntu/+source/fprintd/+bug/1933633

from my comment there:
files updates in /etc/pam.d :
-rw-r--r-- 1 root root 1415 feb 9 15:15 gdm-smartcard-sssd-or-password
-rw-r--r-- 1 root root 1373 feb 9 15:15 gdm-smartcard-sssd-exclusive
-rw-r--r-- 1 root root 1408 feb 9 15:15 gdm-smartcard-pkcs11-exclusive
-rw-r--r-- 1 root root 1320 feb 9 15:15 gdm-password
-rw-r--r-- 1 root root 383 feb 9 15:15 gdm-launch-environment
-rw-r--r-- 1 root root 1342 feb 9 15:15 gdm-fingerprint
-rw-r--r-- 1 root root 1192 feb 9 15:15 gdm-autologin

gdm-fingerprint references:
auth required pam_fprintd.so
password required pam_fprin...

[Vincent Gerris (vgerris)]

I found the issue, I had this installed from the Dell repo for 20.04 LTS:
libfprint-2-tod1-goodix
more specifically:
libfprint-2-tod1-goodix_0.0.6-0ubuntu1_somerville1_amd64.deb

This worked great with 20.04 and the fprintd version in there, but apparently it breaks the current version.
Seems I have to wait untill Dell/goodix releases a new version.

I will close this one since the issue is not with fprintd itself.

[Vincent Gerris (vgerris)]

tracked in https://bugs.launchpad.net/libfprint-2-tod1-goodix/+bug/1944369