On Mon 08 Oct 2012 at 21:47:46 +0200, Sergio Gelato wrote:
> I've created a print queue with an
> AllowUser user1
> option. When submitting a print job as user1 all goes as expected, but
> if I submit it as some other user I see a flood of error messages appear
> (observed rates: 375-500 Hz, depending on the client) in
> /var/log/cups/error_log:
>
> E [08/Oct/2012:20:31:23 +0200] Returning IPP client-error-not-authorized for
> Create-Job (ipp://xxx.yyy.zzz.ttt:631/printers/test1) from aaa.bbb.ccc.ddd
>
> cupsd consumes significant amounts of CPU time while the client is trying
> to submit the job. Both the log flood and the CPU consumption stop as soon
> as I cancel the print job on the client.
>
> Conclusion: use of AllowUser/DenyUser can lead to (often inadvertent) denial
Hello Sergio,
Thank you for your comprehensive bug report.
I've done some preliminary work on this by creating a print queue on an
Wheezy machine:
lpadmin -p TEST-AllowUser -v /dev/null -u allow:debian -m <any_ppd_you_want>
>From the same machine I do (as user brian):
lp -d TEST-AllowUser ~/.profile ,
which gives
lp: Not allowed to print.
The error_log says
E [20/Mar/2013:21:36:06 +0000] Returning IPP client-error-not-authorized for
Create-Job (ipp://localhost:631/printers/TEST-AllowUser) from localhost
which looks as one would expect.
Then the same command was issued from a Sid machine. This lead to the
message flood mentioned above.
On the client:
top - 22:10:00 up 12:42, 2 users, load average: 0.56, 0.15, 0.09
Tasks: 65 total, 2 running, 63 sleeping, 0 stopped, 0 zombie
%Cpu(s): 37.6 us, 35.5 sy, 0.0 ni, 17.2 id, 0.0 wa, 0.0 hi, 9.7 si, 0.0 st
KiB Mem: 1034180 total, 172860 used, 861320 free, 52412 buffers
KiB Swap: 0 total, 0 used, 0 free, 62840 cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2121 root 20 0 11128 6784 2532 R 44.8 0.7 22:49.43 cupsd
13420 root 20 0 19244 6684 1432 S 34.8 0.6 0:09.40 ipp
On the server:
top - 22:15:37 up 4:45, 2 users, load average: 0.51, 0.38, 0.20
Tasks: 67 total, 2 running, 65 sleeping, 0 stopped, 0 zombie
%Cpu(s): 13.0 us, 9.1 sy, 0.0 ni, 76.0 id, 0.8 wa, 0.0 hi, 1.0 si, 0.0 st
KiB Mem: 2072492 total, 740336 used, 1332156 free, 15332 buffers
KiB Swap: 0 total, 0 used, 0 free, 676132 cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3405 root 20 0 9176 3304 2516 R 44.2 0.2 2:45.24 cupsd
So, Sergio, which one one of us is going to report this upstream? You or
I?
Regards,
Brian.
--
To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org
with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
