cupsd crashed with SIGSEGV in avahi_entry_group_free()

[Markward Kufleitner]

after updates of cups-filter and reboot

ProblemType: Crash
DistroRelease: Ubuntu 17.10
Package: cups-daemon 2.2.4-7
ProcVersionSignature: Ubuntu 4.13.0-11.12-generic 4.13.1
Uname: Linux 4.13.0-11-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
Date: Thu Sep 21 17:43:42 2017
ExecutablePath: /usr/sbin/cupsd
Lpstat:
 device for HP-LaserJet-4200: hp:/net/hp_LaserJet_4200?ip=192.168.10.21
 device for PDF: cups-pdf:/
MachineType: Dell Inc. OptiPlex 960
Papersize: a4
PpdFiles:
 PDF: Generic CUPS-PDF Printer (w/ options)
 HP-LaserJet-4200: HP LaserJet 4200 Series Postscript (recommended)
ProcAttrCurrent: /usr/sbin/cupsd (enforce)
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.13.0-11-generic root=UUID=b7879efd-332b-42e8-9e7c-4ec466c90bac ro agp=off quiet splash vt.handoff=7
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-11-generic root=UUID=b7879efd-332b-42e8-9e7c-4ec466c90bac ro agp=off quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x7f32dc0c7954 <avahi_entry_group_free+4>: cmpq $0x0,(%rdi)
 PC (0x7f32dc0c7954) ok
 source "$0x0" ok
 destination "(%rdi)" (0x00000000) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: cups
StacktraceTop:
 avahi_entry_group_free () from /usr/lib/x86_64-linux-gnu/libavahi-client.so.3
 ?? ()
 ?? ()
 ?? ()
 ?? ()
Title: cupsd crashed with SIGSEGV in avahi_entry_group_free()
UpgradeStatus: Upgraded to artful on 2017-09-19 (2 days ago)
UserGroups:

dmi.bios.date: 08/06/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A18
dmi.board.name: 0Y958C
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA18:bd08/06/2013:svnDellInc.:pnOptiPlex960:pvr:rvnDellInc.:rn0Y958C:rvrA00:cvnDellInc.:ct6:cvr:
dmi.product.name: OptiPlex 960
dmi.sys.vendor: Dell Inc.

[Apport retracing service (apport)]

StacktraceTop:
 avahi_entry_group_free (group=0x0) at entrygroup.c:242
 dnssdDeregisterInstance (srv=0x56336dce7608 <WebIFSrv>, from_callback=from_callback@entry=0) at dirsvc.c:684
 dnssdDeregisterInstance (from_callback=0, srv=<optimized out>) at dirsvc.c:670
 dnssdStop () at dirsvc.c:1297
 cupsdStopBrowsing () at dirsvc.c:270

[Till Kamppeter (till-kamppeter)]

Principally this kind of problem got already fixed and should not occur again with the cups-daemon 2.2.4-7 package or newer. It is possible that perhaps your /usr/sbin/cupsd file got somehow overwritten by an older version.

So please try at first the following:

sudo apt install --reinstall cups-daemon

Then reboot the system and observe whether this makes the problem going away.

Please report back here.

[Markward Kufleitner (c-infv-9)]

Since I executed

sudo apt install --reinstall cups-daemon

bug doesn't come up again.

[Till Kamppeter (till-kamppeter)]

Thanks for the feedback, but "Fix released" means that there is actually released a newer package version which fixes the problem. In your case the bug report was caused by some error on your system, so I mark the bug report as "Invalid".

[Markward Kufleitner (c-infv-9)]

This bug is not fixed. It just came up again after reboot.

[Markward Kufleitner (c-infv-9)]

This Bug came again just after shutdown, reboot and logging in to cinnamon.

Any hints, what's wrong with my system?

[Launchpad Janitor (janitor)]

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

[Markward Kufleitner (c-infv-9)]

Still comes up just after logging in to cinnamon.