I reproduced the crash again today, this time with dbus debug symbols installed. The stack trace is attached. The stack is entirely avahi + dbus code, and the signature is very similar to other crashes reported in other applications. Looks like there might be a locking problem in the way cups uses avahi?
This thread describes a similar stack trace, and has some tips about using avahi in a threaded environment: http://marc.info/?l=freedesktop-avahi&m=122021745832173 Comment #12 of bug 524566 shows a very similar stack (without avahi), and the remainder of the bug has additional analysis. Bug 1055060 has a crash at the same location within dbus, though the bottom of the stack is much different. ** Attachment added: "stack trace w/ dbus debug symbols" https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1086019/+attachment/3453990/+files/Stacktrace -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to cups in Ubuntu. https://bugs.launchpad.net/bugs/1086019 Title: cupsd crashes regularly (daily) Status in “cups” package in Ubuntu: New Bug description: Every day I get a 'System Problem Detected' dialog that says that cupsd has crashed. The symptom is similar to the one described in bug 1034045. I expected this would be fixed by cups 1.6.1-0ubuntu11, but I have that version installed and the errors persist. The test case in bug 1034045 does not result in an immediate crash of cupsd. Specifically, this does not produce a crash on my system: 1. Run 'sudo rm -f /var/crash/_usr_sbin_cupsd.0.crash' 2. Run 'sudo service cupsd restart' 3. Verify that a new /var/crash/_usr_sbin_cupsd.0.crash file has been created (and if on a desktop, that a new crash notification has been shown). ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: cups 1.6.1-0ubuntu11 ProcVersionSignature: Error: [Errno 2] No such file or directory: '/proc/version_signature' Uname: Linux 3.6.3-030603-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 CupsErrorLog: Date: Mon Dec 3 10:49:54 2012 InstallationDate: Installed on 2010-09-17 (808 days ago) InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta amd64 (20100901.1) KernLog: Dec 3 10:41:14 steve-laptop kernel: [71466.813974] type=1400 audit(1354549274.550:29): apparmor="STATUS" operation="profile_replace" name="/usr/lib/cups/backend/cups-pdf" pid=15433 comm="apparmor_parser" Dec 3 10:41:14 steve-laptop kernel: [71466.814450] type=1400 audit(1354549274.550:30): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/cupsd" pid=15433 comm="apparmor_parser" MachineType: Apple Inc. MacBookPro3,1 MarkForUpload: True Papersize: letter ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.6.3-030603-generic root=UUID=4b3d81ed-fb5d-4946-97c0-ec537e1bfa3f ro quiet splash SourcePackage: cups UpgradeStatus: Upgraded to quantal on 2012-08-07 (118 days ago) dmi.bios.date: 03/05/08 dmi.bios.vendor: Apple Inc. dmi.bios.version: MBP31.88Z.0070.B07.0803051658 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: Mac-F4238BC8 dmi.board.vendor: Apple Inc. dmi.board.version: PVT dmi.chassis.asset.tag: Asset Tag# dmi.chassis.type: 2 dmi.chassis.vendor: Apple Inc. dmi.chassis.version: Mac-F4238BC8 dmi.modalias: dmi:bvnAppleInc.:bvrMBP31.88Z.0070.B07.0803051658:bd03/05/08:svnAppleInc.:pnMacBookPro3,1:pvr1.0:rvnAppleInc.:rnMac-F4238BC8:rvrPVT:cvnAppleInc.:ct2:cvrMac-F4238BC8: dmi.product.name: MacBookPro3,1 dmi.product.version: 1.0 dmi.sys.vendor: Apple Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1086019/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
