[pkg-apparmor] Bug#883765: cups-client: Unsupported document-format "application/octet-stream".

[P V Mathew]

On 2017-12-12 05:24, Brian Potkin wrote:
> On Mon 11 Dec 2017 at 20:02:42 +0000, Brian Potkin wrote:
>
>> On Mon 11 Dec 2017 at 22:28:15 +0530, P V Mathew wrote:
>>
>>> dmesg showed some sort of infinite loop?
>>>
>>> Oops. realize now, may be about 2-3 years ago when my var partition got
>>> full,
>>>
>>> had moved the var/log on to /home/ and sym-linked to it in var. May be
>>>
>>> this is not consistent with apparmor(not sure?).
>> When I do that I can still print but the error_log is not written to
>> because cupsd cannot change the permissions on /var/log/cups (as shown
>> by systemctl status cups after restarting cups).
> I reckon the location of /var/log and the permissions on it is the
> cause of your getting an empty error_log and has nothing to do with
> the subject of your report. It would occur whether or not apparmor
> is installed. You can check this.
Sorry once again. Even /usr/share was as symlink.

This symlinking business happened over a period of
15 years. Each time one partition gets full I had the habit
of symlinking it to some place where space is available
rather than resizing partitions etc. When I change my
hardware, I always clone the existing system. So the
symlinks continued...

After following integri solution of mount bind for every
symlink, all is right and working fine.

>
>>> any way,  pieces of dmesg|grep cups attached.  Not possible to attach full
>>>
>>> file as similar lines keeps repeating.
>>>
>>> Please let me know if any more input is required.
>> Thanks, Mathew.
>>
>>  From bb.bbz2:
>>
>> [ 2121.775238] audit: type=1400 audit(1513009058.480:17316): apparmor="DENIED" \
>>                 operation="chown" profile="/usr/sbin/cupsd" name="/home/log/cups/" \
>>                 pid=5896 comm="cupsd" requested_mask="w" denied_mask="w" fsuid=0 ouid=0
>>
>> [ 2121.775251] audit: type=1400 audit(1513009058.480:17317): apparmor="DENIED" \
>>                 operation="capable" profile="/usr/sbin/cupsd" pid=5896 comm="cupsd" \
>>                 capability=12  capname="net_admin"
>>
>> apparmor is new to buster and I am new to apparmor; but this looks like
>> cupsd has been refused write permission.
>>
>> intrigeri is our lifeline for things apparmor, so I have cc'ed him (her?)
>> for advice.
> I missed this in bb.bz2:
>
>   [ 2153.319653] cupsd[5896]: segfault at c ip 00007f36a1f13f46 sp 00007ffc5bb5ba28 error 4 in libc-2.25.so[7f36a1e92000199000]
>
> You did say cupsd crashed?
Yes. Even this issue seems to have resolved.
> I am out of my depth with this sort of thing but came across
>
>   https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1706052
>
> Please read and carry out the instructions in message #38 there. You
> don't need sudo. How do you go on?
Did not have to do this.
I Do not use sudo(some how not my preference.), use ssh instead.
> Cheers,
>
> Brian.
>
Thanks for all the help.

May I remove apparmor now. Have no need for it. All this arose

because Debian had introduced it as default.   But I am happy to

have a learned a few things in between.

Regards and thanks once again for all your help.

Mathew