kernel-5.15: disable IMA and SafeSetID LSM #2789
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
The integrity measurement architecture is a kernel feature to allow for runtime integrity checking of files. As the file system is immutable in Bottlerocket and we are doing boot time integrity checking there is no real use for IMA. Signed-off-by: Leonard Foerster <foersleo@amazon.com>
We do not grant CAP_SETUID of CAP_SETGID to any of the users we have on the host system. Using this LSM to controll uid/gid transitions in a finer grained way is not useful for our use case. Signed-off-by: Leonard Foerster <foersleo@amazon.com>
stmcginnis
approved these changes
Feb 9, 2023
markusboehme
approved these changes
Feb 9, 2023
arnaldo2792
approved these changes
Feb 9, 2023
This was referenced Feb 10, 2023
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
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Outdated suggestions cannot be applied.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.
Issue number:
Closes # #2708 #2707
Description of changes:
As a fallout of the latest kernel updates we inherited some additional hardening features. Evaluating both of these features (IMA, SafeSetID LSM) we identified them as not applicable in a meaningful way in Bottlerocket. Hence, disable them to keep our kernel as lean as possible.
Testing done:
With disabling IMA we also remove a bunch of IMA sub-configurations that are not reachable anymore. We do not remove any unwanted options:
A full config diff for all versions can be found in this gist.
Running the a test build locally in qemu worked as expected.
Terms of contribution:
By submitting this pull request, I agree that this contribution is dual-licensed under the terms of both the Apache License, version 2.0, and the MIT license.