cups-proxyd[2318]: segfault at 18 ip 00005975fb88bd75

[Etienne Lorrain]

dmesg shows, ubuntu-24.04 just updated and no more booting to graphic, more details in the attached tgz:
It might be apparmor fault, or the other problems before in dmesg attached...

[ 5.391769] show_signal: 175 callbacks suppressed
[ 5.391770] traps: gdm3[2173] trap int3 ip:7285a1f066a1 sp:7ffdddd5cf10 error:0 in libglib-2.0.so.0.8000.0[7285a1ec2000+a0000]
[ 5.412320] audit: type=1400 audit(1715335404.407:186): apparmor="DENIED" operation="capable" class="cap" profile="/usr/lib/snapd/snap-confine" pid=2251 comm="snap-confine" capability=12 capname="net_admin"
[ 5.412324] audit: type=1400 audit(1715335404.407:187): apparmor="DENIED" operation="capable" class="cap" profile="/usr/lib/snapd/snap-confine" pid=2251 comm="snap-confine" capability=38 capname="perfmon"
[ 5.667941] audit: type=1326 audit(1715335404.663:188): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=snap.cups.cupsd pid=2317 comm="cupsd" exe="/snap/cups/1047/sbin/cupsd" sig=0 arch=c000003e syscall=93 compat=0 ip=0x70f5f208da9b code=0x50000
[ 5.902432] Bluetooth: RFCOMM TTY layer initialized
[ 5.902436] Bluetooth: RFCOMM socket layer initialized
[ 5.902440] Bluetooth: RFCOMM ver 1.11
[ 6.666335] audit: type=1326 audit(1715335405.661:189): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=snap.cups.cupsd pid=2318 comm="cups-proxyd" exe="/snap/cups/1047/sbin/cups-proxyd" sig=0 arch=c000003e syscall=314 compat=0 ip=0x7b88291e988d code=0x50000
[ 6.935390] fbcon: Taking over console
[ 6.936953] Console: switching to colour frame buffer device 240x67
[ 7.485887] r8169 0000:0b:00.0 enp11s0: Link is Up - 1Gbps/Full - flow control off
[ 7.711372] cups-proxyd[2318]: segfault at 18 ip 00005975fb88bd75 sp 00007ffeb2abfb70 error 4 in cups-proxyd[5975fb888000+7000] likely on CPU 28 (core 12, socket 0)
[ 7.711384] 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
[ 8.278587] traps: gdm3[2576] trap int3 ip:71bcaf7b16a1 sp:7ffd0797dc40 error:0 in libglib-2.0.so.0.8000.0[71bcaf76d000+a0000]
[ 9.711404] traps: gdm3[2636] trap int3 ip:7b4bc456d6a1 sp:7fff0fc29d20 error:0 in libglib-2.0.so.0.8000.0[7b4bc4529000+a0000]
[ 11.146862] traps: gdm3[2675] trap int3 ip:743a31d656a1 sp:7ffe515ac6a0 error:0 in libglib-2.0.so.0.8000.0[743a31d21000+a0000]
[ 12.574764] traps: gdm3[2712] trap int3 ip:74eb70fec6a1 sp:7ffe64dae640 error:0 in libglib-2.0.so.0.8000.0[74eb70fa8000+a0000]
[ 71.176574] audit: type=1400 audit(1715335470.457:190): apparmor="DENIED" operation="capable" class="cap" profile="/usr/lib/snapd/snap-confine" pid=2892 comm="snap-confine" capability=12 capname="net_admin"
[ 71.176585] audit: type=1400 audit(1715335470.457:191): apparmor="DENIED" operation="capable" class="cap" profile="/usr/lib/snapd/snap-confine" pid=2892 comm="snap-confine" capability=38 capname="perfmon"
[ 981.636089] sd 6:0:0:0: [sda] 7759872 512-byte logical blocks: (3.97 GB/3.70 GiB)
[ 981.637873] sda: detected capacity change from 0 to 7759872
[ 981.640768] sda: sda1

[Launchpad Janitor (janitor)]

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

[lioncub (lioncub)]

/etc/cups/cupsd.conf with LogLevel debug
debug log:
```
2024-05-10T21:37:29.451316+05:00 home systemd[1]: Started cups.path - CUPS Scheduler.
2024-05-10T21:37:29.451414+05:00 home systemd[1]: Listening on cups.socket - CUPS Scheduler.
2024-05-10T21:37:30.510367+05:00 home systemd[1]: Starting cups.service - CUPS Scheduler...
2024-05-10T21:37:30.514362+05:00 home systemd[1]: Started snap.cups.cups-browsed.service - Service for snap application cups.cups-browsed.
2024-05-10T21:37:30.515438+05:00 home systemd[1]: Started snap.cups.cupsd.service - Service for snap application cups.cupsd.
2024-05-10T21:37:30.569987+05:00 home systemd[1]: Started cups.service - CUPS Scheduler.
2024-05-10T21:37:30.804911+05:00 home cups.cups-browsed[1450]: + mkdir -p /var/snap/cups/1047/var/log
2024-05-10T21:37:30.805066+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/1047/var/spool/tmp
2024-05-10T21:37:30.899651+05:00 home cups.cups-browsed[1450]: + mkdir -p /var/snap/cups/1047/var/cache
2024-05-10T21:37:30.899697+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/1047/var/run/certs
2024-05-10T21:37:30.900751+05:00 home cups.cups-browsed[1450]: + mkdir -p /var/snap/cups/1047/var/run
2024-05-10T21:37:30.900871+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/1047/var/log
2024-05-10T21:37:30.901845+05:00 home cups.cups-browsed[1450]: + mkdir -p /var/snap/cups/common/etc/cups
2024-05-10T21:37:30.901889+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/1047/var/cache/fontconfig
2024-05-10T21:37:30.902908+05:00 home cups.cups-browsed[1450]: + CONF=/var/snap/cups/common/etc/cups/cups-browsed.conf
2024-05-10T21:37:30.902930+05:00 home cups.cups-browsed[1450]: + CLIENTCONF=/var/snap/cups/common/etc/cups/client.conf
2024-05-10T21:37:30.902945+05:00 home cups.cups-browsed[1450]: + DAEMON=cups-browsed
2024-05-10T21:37:30.902957+05:00 home cups.cups-browsed[1450]: + export LC_ALL=C.UTF-8
2024-05-10T21:37:30.902969+05:00 home cups.cups-browsed[1450]: + export LANG=C.UTF-8
2024-05-10T21:37:30.902980+05:00 home cups.cups-browsed[1450]: + TMPDIR=/var/snap/cups/1047/tmp
2024-05-10T21:37:30.902992+05:00 home cups.cups-browsed[1450]: + mkdir -p /var/snap/cups/1047/tmp
2024-05-10T21:37:30.903012+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/common/etc/cups/ppd
2024-05-10T21:37:30.904170+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/common/etc/cups/ssl
2024-05-10T21:37:30.905185+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/common/run
2024-05-10T21:37:30.906250+05:00 home cups.cupsd[1453]: + mkdir -m 0755 -p /run/cups
2024-05-10T21:37:30.907276+05:00 home cups.cupsd[1453]: + export LC_ALL=C.UTF-8
2024-05-10T21:37:30.907298+05:00 home cups.cupsd[1453]: + export LANG=C.UTF-8
2024-05-10T21:37:30.907311+05:00 home cups.cupsd[1453]: + export TMPDIR=/var/snap/cups/1047/tmp
2024-05-10T21:37:30.907323+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/1047/tmp
2024-05-10T21:37:30.911642+05:00 home cups.cups-browsed[1450]: + CUPSSTARTED=0
2024-05-10T21:37:30.911676+05:00 home cups.cupsd[1453]: + CUPSTMPDIR=/var/snap/cups/1047/var/spool/tmp
2024-05-10T21:37:30.911691+05:00 home cups.cupsd[1453]: + [ -d /var/snap/cups/1047/tmp ]
2024-05-10T21:3...

[Etienne Lorrain (etienne-lorrain)]

For information, ubuntu-24.04 has updated Linux kernel from 6.5.0-28 to 6.8.0-31

The problem reported is only with newer 6.8.0-31, and also failure to reach a working system is only with new kernel.

The previous Linux kernel is still available in the Grub menu, and choosing "6.5.0-28-generic" to boot does bring a working system, with the only line containing "cups" in dmesg being:
[ 5.404257] audit: type=1400 audit(1715587151.264:47): apparmor="DENIED" operation="capable" class="cap" profile="/usr/sbin/cupsd" pid=1039 comm="cupsd" capability=12 capname="net_admin"

[Sebastien Bacher (seb128)]

Thank you for your bug report. You are focusing the cups issue which is a printing component but from the description the most problematic problem is

[ 8.278587] traps: gdm3[2576] trap int3 ip:71bcaf7b16a1 sp:7ffd0797dc40 error:0 in libglib-2.0.so.0.8000.0[71bcaf76d000+a0000]

which is the login manager not starting

could you Look in /var/crash for crash files and if found run:
    ubuntu-bug YOURFILE.crash
Then tell us the ID of the newly-created bug.

If that step failed then look at https://errors.ubuntu.com/user/ID where ID is the content of file /var/lib/whoopsie/whoopsie-id on the machine. Do you find any links to recent problems on that page? If so then please send the links to us.

[Etienne Lorrain (etienne-lorrain)]

Unfortunately /var/crash is empty, maybe due to the failure to start.
sudo cat /var/lib/whoopsie/whoopsie-id
ad33826e2f810e105835159dfb99f6a96d895ef0f2572f8db1cf7693a913ff9e35a336244664aaa184f4ed2f0f925f99e481379028b0c7eba2bd9df9363ca035
So there seem to be stuff at:
https://errors.ubuntu.com/user/ad33826e2f810e105835159dfb99f6a96d895ef0f2572f8db1cf7693a913ff9e35a336244664aaa184f4ed2f0f925f99e481379028b0c7eba2bd9df9363ca035

But I can't read that myself, hopefully you are:
Sorry, you are not a member of a group that is allowed to see the data from error reports. Please fill out this form to request access.

[Kent (revek)]

I have this problem. I have the cups error but think the main problem is the problem with libglib-2.0.so.0.8000.0. Its a fresh install(13 days) on a laptop with a 1st generation I3.

I have two crash files which I ran ubuntu-bug on and sent them. Since I have no GUI it did not launch a web browser to fill out the report. Is there a ID in the report on the two crash files I have?

The filenames are _usr_libexec_gdm-session-worker.0.crash and _usr_sbin_gdm3.0.crash.

Since it may be of help my whoopsie id is
9bf8a2458c673c7d3326545c891233e751b5f207a81c39a8e01cb9a8b23759736495296ec45c53034c53473d6e3cf09635a95ebbc5e6d38f1458ec526f2b6a3e

[Etienne Lorrain (etienne-lorrain)]

Hi Kent,

you should be able to still run a previous version of the kernel with the boot menu, like what I do, and you can see if your problems are listed at: https://errors.ubuntu.com/user/9bf8a2458c673c7d3326545c891233e751b5f207a81c39a8e01cb9a8b23759736495296ec45c53034c53473d6e3cf09635a95ebbc5e6d38f1458ec526f2b6a3e
I can see "No errors have been reported from this system " for your whoopsie, maybe you did not allow automatic upload, I have some report there because I did...

I did not investigate the login manager not starting with the newer kernel myself, lack of time...
It would probably be good to create a new bug number for that, keeping that bug report for cups-proxyd

[Kent (revek)]

I didn't have the old kernel since it was a new install. I solved it by switching to pure debian on that laptop.