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[Bug 1156398] Re: "scp-dbus-service" creates 100s of thousands symlinks to the ppd-file in "/tmp" untill the root filesystem runs out of inodes everytime I print something


The clue is "every time I print something". scp-dbus-service is not
involved in the print path, and is only used when configuring queues.

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  "scp-dbus-service" creates 100s of thousands symlinks to the ppd-file
  in "/tmp" untill the root filesystem runs out of inodes everytime I
  print something

Status in “system-config-printer” package in Ubuntu:
Status in “system-config-printer” package in Debian:

Bug description:
  When I print e.g. a webpage in Firefox, shortly after the printing finished, the root filesystem is running out of available inodes.
  "/tmp/" is populated with hundreds of thousands of symlinks to "/etc/cups/ppd/Hewlett-Packard-hp-LaserJet-4350.ppd" which are all named like "51465xxxxxxxx" (where x is a hexadecimal digit) and are created at a rate of aprox. 1500 new symlinks per second. The filenames are not counted up but seem to appear in random order.

  During this time the process "/usr/bin/python /usr/share/system-
  config-printer/scp-dbus-service.py" is using ~130% CPU.

  As soon as I kill this process, no more symlinks are created.
  When I wait for the inodes to run out, this process's CPU usage drops to ~7% for a few seconds before the process suddenly disapears from the process list. This indicates that all the symlinks are created by this one process.

  If I delete the symlinks now and print another document, things start
  over again.

  ---+ Furher notes
  This does not happen when printing with

  It does happen when printing with

  An unpriviledged user could break down the system by filling up all
  free inodes on the root fs, so this might be security relevant.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: system-config-printer-common 1.3.11+20120807-0ubuntu10
  ProcVersionSignature: Ubuntu 3.5.0-25.39-generic
  Uname: Linux 3.5.0-25-generic x86_64
  NonfreeKernelModules: openafs fglrx
  ApportVersion: 2.6.1-0ubuntu10
  Architecture: amd64
  Date: Mon Mar 18 00:45:56 2013
  Lpstat: Error: command ['lpstat', '-v'] failed with exit code 1: lpstat: Transport endpoint is not connected
  MachineType: Gigabyte Technology Co., Ltd. GA-A75M-UD2H
  MarkForUpload: True
  PackageArchitecture: all
  Papersize: letter
  PpdFiles: Hewlett-Packard-hp-LaserJet-4350: HP LaserJet 4350 pcl3, hpcups 3.12.2
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.5.0-25-generic root=/dev/mapper/hostname-root ro splash quiet vt.handoff=7
  SourcePackage: system-config-printer
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/03/2011
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F5
  dmi.board.name: GA-A75M-UD2H
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF5:bd11/03/2011:svnGigabyteTechnologyCo.,Ltd.:pnGA-A75M-UD2H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-A75M-UD2H:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
  dmi.product.name: GA-A75M-UD2H
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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