crash cups-proxyd

[Ionut Nechita]

Ubuntu IOT Desktop 22.04 LTS

# cat /etc/os-release
PRETTY_NAME="Ubuntu 22.04.2 LTS"
NAME="Ubuntu"
VERSION_ID="22.04"
VERSION="22.04.2 LTS (Jammy Jellyfish)"
VERSION_CODENAME=jammy
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=jammy

Kernel Version: 5.15.0-1028-intel-iotg

# journalctl --no-hostname -b --no-pager | grep cups-proxyd
mai 31 11:51:22 cups.cupsd[949]: + PROXY_DAEMON=cups-proxyd
mai 31 11:51:22 cups.cupsd[3032]: exec cups-proxyd /var/snap/cups/common/run/cups.sock /run/cups/cups.sock -l --logdir /var/snap/cups/872/var/log
mai 31 11:51:23 audit[3032]: SECCOMP auid=4294967295 uid=0 gid=0 ses=4294967295 subj=snap.cups.cupsd pid=3032 comm="cups-proxyd" exe="/snap/cups/872/sbin/cups-proxyd" sig=0 arch=c000003e syscall=314 compat=0 ip=0x7fb050c2973d code=0x50000
mai 31 11:51:23 kernel: audit: type=1326 audit(1685523083.773:85): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=snap.cups.cupsd pid=3032 comm="cups-proxyd" exe="/snap/cups/872/sbin/cups-proxyd" sig=0 arch=c000003e syscall=314 compat=0 ip=0x7fb050c2973d code=0x50000
mai 31 11:51:24 kernel: cups-proxyd[3032]: segfault at 18 ip 0000558e95990d6e sp 00007ffe2436a230 error 4 in cups-proxyd[558e9598d000+7000]

Error: cups-proxyd[3032]: segfault at 18 ip 0000558e95990d6e sp 00007ffe2436a230 error 4 in cups-proxyd[558e9598d000+7000]

Snap list:
# snap list
Name Version Rev Tracking Publisher Notes
bare 1.0 5 latest/stable canonical✓ base
chromium 113.0.5672.126 2477 latest/stable canonical✓ -
core20 20230503 1891 latest/stable canonical✓ base
core22 20230503 634 latest/stable canonical✓ base
cups 2.4.2-5 872 latest/stable openprinting✓ -
firefox 111.0-2 2432 latest/stable/… mozilla✓ -
gnome-3-38-2004 0+git.6f39565 140 latest/stable/… canonical✓ -
gnome-42-2204 0+git.587e965 102 latest/stable canonical✓ -
gtk-common-themes 0.1-81-g442e511 1535 latest/stable/… canonical✓ -
snap-store 41.3-71-g709398e 959 latest/stable/… canonical✓ -
snapd 2.59.2 19122 latest/stable canonical✓ snapd
snapd-desktop-integration 0.9 83 latest/stable/… canonical✓ -

Reproduced: At every boot OS

[Till Kamppeter (till-kamppeter)]

cups-proxyd is replicating your system CUPS' print queues and IPP print services available to your system on the CUPS of the CUPS Snap. Therefore | need to know what is available on your system. So please run the following commands and post the output here:

lpstat -v
driverless
driverless --std-ipp-uris
ippfind

Also please attach your file

/var/snap/cups/current/var/log/cups-proxyd_log

Do not compress the file.

[Nathan Bryant (nbryant42)]

This also affects me (identical IP in the segfault) but I don't have any printers set up.

[Ro (robert-markula)]

I also experience this issue on a freshly installed Ubuntu 22.04 Desktop with no printers atteched.

First I give an overview of my system and then I'll try to add the missing information.

*** Kernel version: ***
# uname -a
Linux hostname 5.15.0-76-generic #83-Ubuntu SMP Thu Jun 15 19:16:32 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

*** OS information: ***
# cat /etc/os-release
PRETTY_NAME="Ubuntu 22.04.2 LTS"
NAME="Ubuntu"
VERSION_ID="22.04"
VERSION="22.04.2 LTS (Jammy Jellyfish)"
VERSION_CODENAME=jammy
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=jammy

*** List of installed Snaps: ***
root@hostname:~# snap list
Name Version Revision Tracking Herausgeber Hinweise
bare 1.0 5 latest/stable canonical✓ base
chromium 114.0.5735.198 2529 latest/stable canonical✓ -
core18 20230530 2785 latest/stable canonical✓ base
core20 20230622 1974 latest/stable canonical✓ base
core22 20230703 817 latest/stable canonical✓ base
cups 2.4.6-4 980 latest/stable openprinting✓ -
firefox 115.0.2-1 2908 latest/stable mozilla✓ -
gnome-3-28-1804 3.28.0-19-g98f9e67.98f9e67 198 latest/stable canonical✓ -
gnome-3-38-2004 0+git.efb213a 143 latest/stable canonical✓ -
gnome-42-2204 0+git.ff35a85 120 latest/stable canonical✓ -
gtk-common-themes 0.1-81-g442e511 1535 latest/stable canonical✓ -
mqtt-explorer 0.3.5 29 latest/stable thomasnordquist -
snapd 2.59.5 19457 latest/stable canonical✓ snapd

*** Segfault in the syslog: ***
# less /var/log/syslog:
Jul 20 09:48:29 hostname kernel: [ 86.133013] audit: type=1326 audit(1689839309.216:87): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=snap.cups.cupsd pid=8278 comm="cupsd" exe="/snap/cups/980/sbin/cupsd" sig=0 arch=c000003e syscall=93 compat=0 ip=0x7fd3108a8c4b code=0x50000
Jul 20 09:48:30 hostname kernel: [ 87.194090] audit: type=1326 audit(1689839310.280:88): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=snap.cups.cupsd pid=8280 comm="cups-proxyd" exe="/snap/cups/980/sbin/cups-proxyd" sig=0 arch=c000003e syscall=314 compat=0 ip=0x7f652264ca3d code=0x50000
Jul 20 09:48:30 hostname kernel: [ 87.861485] cups-proxyd[8280]: segfault at 18 ip 000056043483ad75 sp 00007fffff58ad80 error 4 in cups-proxyd[560434837000+7000]
Jul 20 09:48:30 hostname kernel: [ 87.861534] Code: 83 3d ee b2 00 00 00 41 54 55 48 89 fd 53 0f 85 f4 00 00 00 48 8d 1d 69 3d 00 00 48 63 45 1c 48 89 df 48 c1 e0 05 48 03 45 08 <48> 8b 50 18 8b 70 14 e8 0f d0 ff ff 44 8b 65 18 48 89 c7 45 85 e4

*** cups-proxyd_log from the...

[Ro (robert-markula)]

Upon further investigation, I noticed that the cups snap was installed alongside the apt package from the Ubuntu repositories, which is installed by default on ubuntu-desktop and ubuntu-desktop-minimal:

# dpkg -l | grep cups
ii bluez-cups 5.64-0ubuntu1 amd64 Bluetooth printer driver for CUPS
ii cups 2.4.1op1-1ubuntu4.4 amd64 Common UNIX Printing System(tm) - PPD/driver support, web interface
ii cups-browsed 1.28.15-0ubuntu1.2 amd64 OpenPrinting CUPS Filters - cups-browsed
ii cups-bsd 2.4.1op1-1ubuntu4.4 amd64 Common UNIX Printing System(tm) - BSD commands
ii cups-client 2.4.1op1-1ubuntu4.4 amd64 Common UNIX Printing System(tm) - client programs (SysV)
ii cups-common 2.4.1op1-1ubuntu4.4 all Common UNIX Printing System(tm) - common files
ii cups-core-drivers 2.4.1op1-1ubuntu4.4 amd64 Common UNIX Printing System(tm) - driverless printing
ii cups-daemon 2.4.1op1-1ubuntu4.4 amd64 Common UNIX Printing System(tm) - daemon
ii cups-filters 1.28.15-0ubuntu1.2 amd64 OpenPrinting CUPS Filters - Main Package
ii cups-filters-core-drivers 1.28.15-0ubuntu1.2 amd64 OpenPrinting CUPS Filters - Driverless printing
ii cups-ipp-utils 2.4.1op1-1ubuntu4.4 amd64 Common UNIX Printing System(tm) - IPP developer/admin utilities
ii cups-pk-helper 0.2.6-1ubuntu5 amd64 PolicyKit helper to configure cups with fine-grained privileges
ii cups-ppdc 2.4.1op1-1ubuntu4.4 amd64 Common UNIX Printing System(tm) - PPD manipulation utilities
ii cups-server-common 2.4.1op1-1ubuntu4.4 all Common UNIX Printing System(tm) - server common files
ii libcups2:amd64 2.4.1op1-1ubuntu4.4 amd64 Common UNIX Printing System(tm) - Core library
ii libcupsfilters1:amd64 1.28.15-0ubuntu1.2 amd64 OpenPrinting CUPS Filters - Shared library
ii libcupsimage2:amd64 2.4.1op1-1ubuntu4.4 amd64 Common UNIX Printing System(tm) - Raster image library
ii printer-driver-hpcups 3.21.12+dfsg0-1 amd64 HP Linux Printing and Imaging - CUPS Raster driver (hpcups)
ii python3-cups:amd64 2.0.1-5build1 amd64 Python3 bindings for CUPS
ii python3-cupshelpers 1.5.16-0ubuntu3 all Python utility modules...

[Nathan Bryant (nbryant42)]

Maybe that's because it was upgraded from Focal? Seems like the probable cause at least on my machine

[Launchpad Janitor (janitor)]

[Expired for cups (Ubuntu) because there has been no activity for 60 days.]

[Islam (islam)]

I'm getting this error on 23.10:
cups-proxyd[2415]: segfault at 18 ip 000055efd95e6d75 sp 00007ffc3ee0d810 error 4 in cups-proxyd[55efd95e3000+7000] likely on CPU 1 (core 1, socket 0)

[Eugene San (eugenesan)]

I can confirm the issue on 23.10 with no printers configured

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Islam (islam)]

Still happening in 24.04.

[Birgit Edel (biredel)]

From 22.04, no printers (LP: #2017447):

2024-06-12 16:15:04.871 kernel cups-proxyd[1716]: segfault at 18 ip 00005ab34f1b1d75 sp 00007fff18534040 error 4 in cups-proxyd[5ab34f1ae000+7000] likely on CPU 1 (core 1, socket 0)
2024-06-12 16:15:04.871+02 kernel Code: 83 3d ee b2 00 00 00 41 54 55 48 89 fd 53 0f 85 f4 00 00 00 48 8d 1d 69 3d 00 00 48 63 45 1c 48 89 df 48 c1 e0 05 48 03 45 08 <48> 8b 50 18 8b 70 14 e8 0f d0 ff ff 44 8b 65 18 48 89 c7 45 85 e4
2024-06-12 16:15:40.830 snap.cups.cupsd.service cups.cupsd[3630]: ==> Shutting down cups-browsed first
2024-06-12 16:15:40.830 snap.cups.cupsd.service cups.cupsd[3659]: /snap/cups/1047/scripts/stop-cupsd: 15: /snap/cups/1047/stop-cups-browsed: not found
2024-06-12 16:15:40.833 init.scope systemd[1]: snap.cups.cupsd.service: Control process exited, code=exited, status=127/n/a
2024-06-12 16:15:40.899 init.scope systemd[1]: snap.cups.cupsd.service: Failed with result 'exit-code'.
2024-06-12 16:15:41.000 init.scope systemd[1]: snap.cups.cups-browsed.service: Main process exited, code=exited, status=143/n/a
2024-06-12 16:15:41.013 init.scope systemd[1]: snap.cups.cups-browsed.service: Failed with result 'exit-code'.
2024-06-12 16:15:53.858 kernel cups-proxyd[4275]: segfault at 18 ip 0000562d38300d75 sp 00007ffe3755adc0 error 4 in cups-proxyd[562d382fd000+7000] likely on CPU 0 (core 0, socket 0)
2024-06-12 16:15:53.859 kernel Code: 83 3d ee b2 00 00 00 41 54 55 48 89 fd 53 0f 85 f4 00 00 00 48 8d 1d 69 3d 00 00 48 63 45 1c 48 89 df 48 c1 e0 05 48 03 45 08 <48> 8b 50 18 8b 70 14 e8 0f d0 ff ff 44 8b 65 18 48 89 c7 45 85 e4