cupsd assert failure: cupsd: ../avahi-common/dbus-watch-glue.c:205: timeout_data_ref: Assertion `t->ref >= 1' failed.

[Moti Ochayun]

Binary package hint: cups

I startup the computer and i get the error

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: cups 1.4.6-4
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
AssertionMessage: cupsd: ../avahi-common/dbus-watch-glue.c:205: timeout_data_ref: Assertion `t->ref >= 1' failed.
Date: Fri Apr 8 17:31:24 2011
ExecutablePath: /usr/sbin/cupsd
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110202)
Lpstat: Error: command ['lpstat', '-v'] failed with exit code 1: lpstat: No destinations added.
MachineType: BIOSTAR Group H55 HD
Papersize: letter
ProcAttrCurrent: /usr/sbin/cupsd (enforce)
ProcCmdline: /usr/sbin/cupsd -F
ProcEnviron: PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-8-generic root=UUID=f3e18dc1-085b-4283-a518-78713f8ba763 ro single
Signal: 6
SourcePackage: cups
StacktraceTop:
 __kernel_vsyscall ()
 raise () from /lib/i386-linux-gnu/libc.so.6
 abort () from /lib/i386-linux-gnu/libc.so.6
 __assert_fail () from /lib/i386-linux-gnu/libc.so.6
 ?? ()
Title: cupsd assert failure: cupsd: ../avahi-common/dbus-watch-glue.c:205: timeout_data_ref: Assertion `t->ref >= 1' failed.
UpgradeStatus: Upgraded to natty on 2011-04-11 (0 days ago)
UserGroups:

dmi.bios.date: 06/15/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 080015
dmi.board.asset.tag: None
dmi.board.name: H55 HD
dmi.board.vendor: BIOSTAR Group
dmi.chassis.asset.tag: None
dmi.chassis.type: 3
dmi.chassis.vendor: BIOSTAR Group
dmi.chassis.version: 6.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr080015:bd06/15/2010:svnBIOSTARGroup:pnH55HD:pvr6.0:rvnBIOSTARGroup:rnH55HD:rvr:cvnBIOSTARGroup:ct3:cvr6.0:
dmi.product.name: H55 HD
dmi.product.version: 6.0
dmi.sys.vendor: BIOSTAR Group

[Apport retracing service (apport)]

This crash has the same stack trace characteristics as bug #707592. However, the latter was already fixed in an earlier package version than the one in this report. This might be a regression or because the problem is in a dependent package.

[Martin Pitt (pitti)]

Till, this was supposed to be fixed already in bug 707592, seems there's a missing case here?

[Till Kamppeter (till-kamppeter)]

Tim, did you do any fixes on the Avahi patches for CUPS after my initial fixes? It seems that there are still many instabilities, not only this bug.

[Tim Waugh (twaugh)]

Yes, a couple. The complete set (needs re-squashing) is here:

http://twaugh.fedorapeople.org/cups-avahi/

[Till Kamppeter (till-kamppeter)]

Tim, thank you very much.

I have now updated our patch for Avahi support in CUPS using Tim's newest patches (comment #5). I hope that fixes this bug and several other CUPS crashers: bug #754567, bug #751770, bug #754567, bug #744372.

[Till Kamppeter (till-kamppeter)]

The new CUPS package will get released soon as cups 1.4.6-5.

[Martin Pitt (pitti)]

cups (1.4.6-5) unstable; urgency=low

  [ Till Kamppeter ]
  * debian/patches/cups-avahi.dpatch: Updated the patch to add Avahi support
    to the newest state of the art from
    http://twaugh.fedorapeople.org/cups-avahi/ (upstream of the patch),
    in the hope to fix CUPS crashers like LP #759031, #754567, #711875,
    #751770.

  [ Martin Pitt ]
  * debian/local/apparmor-profile: Add cap_dac_read_search for cups-pdf. This
    circumvents the sandboxing even more, but with cups-pdf's architecture
    there is no way around it. (LP: #295536)

 -- Martin Pitt <email address hidden> Mon, 18 Apr 2011 19:22:20 +0200