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Re: Apparmor pain

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	Hi.

On Fri, Jan 29, 2021 at 12:49:42PM +0000, Tony van der Hoff wrote:
> This is a simplified scenario: Say I have 2 machines, both running Debian 10.7. Each machine has 3 users: A, B and C. Each machine has an identical (mantained
> by Unison) directoery: /home/C/pictures, with permissions ugo:rwx owned by C. Each file therein has permissions ugo:r
...
> I don't understand why my two machines are behaving so differently.

uid difference between hosts A and B, most probably.
Along the other things, thunderbird's apparmor policy contains this:

    owner @{HOME}/** r,

I.e. it's allowed to read any file at /home as long as the file is owned
by thunderbird's uid.


> I don't think I really want apparmor running at all,

Add apparmor=0 to kernel's cmdline. Building a kernel without apparmor
helps with that too, but that's straying too far from Debian's defaults.


> The debian wiki gives me a way to disable apparmor by patching grub,
> but that seems like overkill.

You probably got it wrong. Modifying a kernel cmdline and rebuilding
grub with custom patches are different, and they should suggest former
at Debian's wiki.


> Does anyone pease have any suggestions on how to enable an application
> without major surgery? any help appreciated. Thanks

Disabling a problematic apparmor profile altogether is done by:

/usr/sbin/aa-disable /usr/bin/thunderbird

Disabling a problematic apparmor profile but keeping audit records
generation is done by

/usr/sbin/aa-complain /usr/bin/thunderbird

You'll want the first one, probably.

Reco

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Thread

Apparmor pain Tony van der Hoff <lists@vanderhoff.org> - 2021-01-29 14:10 +0100
  Re: Apparmor pain Reco <recoverym4n@enotuniq.net> - 2021-01-29 14:30 +0100
    Re: Apparmor pain Tony van der Hoff <lists@vanderhoff.org> - 2021-01-29 15:30 +0100
      Re: Apparmor pain Brian <ad44@cityscape.co.uk> - 2021-01-29 16:50 +0100
      Re: Apparmor pain David Wright <deblis@lionunicorn.co.uk> - 2021-01-29 18:00 +0100

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