Drop audit/suspend block/checkpoint capabilities from fwupd #7135
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This PR aims to drop the AUDIT subsystem, suspend block and checkpoint restore capabilties from fwupd, as well as explicitly drops the capabilities which have been implicitly dropped as a result of other settings.
Type of pull request:
It is my intention to follow a similar process here as done with SystemCallFilter: drop cautiously, and hopefully transition to a whitelist at the end of the process (although blacklisting will also work - I see no systemd recommendation as to the best option).
Some calls have been implicitly dropped as a result of other settings, assumptions below:
I shall provide some details for the other capabilities in the comments. Multiple lines are permitted (and combined) if prefaced with ~ - from the man page:
This option may appear more than once, in which case the bounding sets are merged by OR, or by AND if the lines are prefixed with "~"
Source: https://www.freedesktop.org/software/systemd/man/latest/systemd.exec.html
The details of the respective capabilities can be found at https://man7.org/linux/man-pages/man7/capabilities.7.html