Re: [PATCH] apparmor: Add support for local profile customizations

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On Tue, Jun 06, 2023 at 04:06:12PM -0600, Jim Fehlig wrote:
> Apparmor profiles in /etc/apparmor.d/ are config files that can and should
> be replaced on package upgrade, which introduces the potential to overwrite
> any local changes. Apparmor supports local profile customizations via
> /etc/apparmor.d/local/<service> [1].
>
> This change makes the support explicit by adding libvirtd, virtqemud, and
> virtxend profile customization stubs to /etc/apparmor.d/local/. The stubs
> are conditionally included by the corresponding main profiles.
>
> [1] https://ubuntu.com/server/docs/security-apparmor
> See "Profile customization" section
>
> Signed-off-by: Jim Fehlig <jfehlig@xxxxxxxx>
> ---
>
> This patch was inspired by an internal bug report. The SUSE libvirt package
> has marked /etc/apparmor.d/<some-libvirt-service> profiles as
> 'config(noreplace)' for as long as I can remember. On rare occasions a
> profile receives a change that is required to avoid regression. And on rarer
> occasions a user might have made local customizations to the profile. With
> 'noreplace', the trap is set for the user to experience the regression.
>
> Unless other apparmor users convince me otherwise, I'm planning to make
> this change in the SUSE package, along with changing the main
> /etc/apparmor.d/ profiles to 'config' and using 'config(noreplace)' for the
> local customizations only.
>
> Note: I'm fine keeping this as a downstream-only patch if upstream isn't
> interested in the clutter.

I think this is a good change.

Note that the Debian package has included this patch[1] for many
years, and while it partially overlaps with what you've added here, I
see that local overrides for abstractions are missing.

Is there a specific reason why you skipped them? Or should we add
those too?


[1] https://salsa.debian.org/libvirt-team/libvirt/-/blob/debian/latest/debian/patches/debian/apparmor_profiles_local_include.patch
-- 
Andrea Bolognani / Red Hat / Virtualization




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