cupsd crashed with SIGSEGV in _IO_vfprintf_internal()

[Peter Troesch]

happened upon login after update.

problems with the update:
the update recommended unity-settings-deamon, but did not require it.

on reboot, login had no unity menu. the system log said
gnome-session[2281]: WARNING: Unable to find required component 'unity-settings-daemon'

I installed unity-settings-deamon from a console, rebooted and upon login got this cupsd crash

ProblemType: Crash
DistroRelease: Ubuntu 14.04
Package: cups-daemon 1.7.1-5ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-8.28-generic 3.13.2
Uname: Linux 3.13.0-8-generic x86_64
ApportVersion: 2.13.2-0ubuntu5
Architecture: amd64
Date: Thu Feb 20 10:34:39 2014
ExecutablePath: /usr/sbin/cupsd
InstallationDate: Installed on 2014-01-03 (47 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140102)
MachineType: LENOVO 4270CTO
Papersize: letter
PpdFiles:
 Officejet_7300: HP Officejet 7300 Series, hpcups 3.14.1
 Officejet_7300_fax: HP Fax hpcups
 HP-7510-series: HP Photosmart 7510 Series, hpcups 3.14.1
 lj-engr: HP LaserJet 4250 Postscript (recommended)
 lj-accounting: HP LaserJet 4250 Postscript (recommended)
ProcAttrCurrent: /usr/sbin/cupsd (enforce)
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-3.13.0-8-generic root=UUID=e63be20d-7355-4392-b5dd-6c9ce693e72f ro quiet splash i915.semaphores=0
ProcEnviron:
 PATH=(custom, no user)
 TERM=linux
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-8-generic root=UUID=e63be20d-7355-4392-b5dd-6c9ce693e72f ro quiet splash i915.semaphores=0
SegvAnalysis:
 Segfault happened at: 0x7fd6c312ebec <_IO_vfprintf_internal+7180>: repnz scas %es:(%rdi),%al
 PC (0x7fd6c312ebec) ok
 source "%es:(%rdi)" (0x0000000c) not located in a known VMA region (needed readable region)!
 destination "%al" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: cups
StacktraceTop:
 _IO_vfprintf_internal (s=s@entry=0x7fff7c1e09c0, format=<optimized out>, format@entry=0x7fd6c4d34b16 "File %d %s/%s %d\n", ap=ap@entry=0x7fff7c1e0b38) at vfprintf.c:1655
 ___vsnprintf_chk (s=0x7fd6c6f003d0 "File 1 s 1\n", maxlen=<optimized out>, flags=1, slen=<optimized out>, format=0x7fd6c4d34b16 "File %d %s/%s %d\n", args=0x7fff7c1e0b38) at vsnprintf_chk.c:63
 cupsFilePrintf () from /usr/lib/x86_64-linux-gnu/libcups.so.2
 ?? ()
 ?? ()
Title: cupsd crashed with SIGSEGV in _IO_vfprintf_internal()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

dmi.bios.date: 03/21/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 8BET61WW (1.41 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4270CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr8BET61WW(1.41):bd03/21/2013:svnLENOVO:pn4270CTO:pvrThinkPadW520:rvnLENOVO:rn4270CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4270CTO
dmi.product.version: ThinkPad W520
dmi.sys.vendor: LENOVO

[Apport retracing service (apport)]

StacktraceTop:
 _IO_vfprintf_internal (s=s@entry=0x7fff7c1e09c0, format=<optimized out>, format@entry=0x7fd6c4d34b16 "File %d %s/%s %d\n", ap=ap@entry=0x7fff7c1e0b38) at vfprintf.c:1655
 ___vsnprintf_chk (s=0x7fd6c6f003d0 "File 1 s 1\n", maxlen=<optimized out>, flags=flags@entry=1, slen=slen@entry=18446744073709551615, format=format@entry=0x7fd6c4d34b16 "File %d %s/%s %d\n", args=args@entry=0x7fff7c1e0b38) at vsnprintf_chk.c:63
 vsnprintf (__ap=0x7fff7c1e0b38, __fmt=0x7fd6c4d34b16 "File %d %s/%s %d\n", __n=<optimized out>, __s=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/stdio2.h:77
 cupsFilePrintf (fp=fp@entry=0x7fd6c7248070, format=format@entry=0x7fd6c4d34b16 "File %d %s/%s %d\n") at file.c:1329
 cupsdSaveAllJobs () at job.c:2109

[Till Kamppeter (till-kamppeter)]

Reported the bug upstream:

https://www.cups.org/str.php?L4394

Michael Sweet, the author of CUPS, is working on it ...