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[24.0 backport] Do not drop effective&permitted set #46221
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Currently moby drops ep sets before the entrypoint is executed. This does mean that with combination of no-new-privileges the file capabilities stops working with non-root containers. This is undesired as the usability of such containers is harmed comparing to running root containers. This commit therefore sets the effective/permitted set in order to allow use of file capabilities or libcap(3)/prctl(2) respectively with combination of no-new-privileges and without respectively. For no-new-privileges the container will be able to obtain capabilities that are requested. Signed-off-by: Luboslav Pivarc <lpivarc@redhat.com> Signed-off-by: Bjorn Neergaard <bjorn.neergaard@docker.com> (cherry picked from commit 3aef732) Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Verify non-root containers are able to use file capabilities. Signed-off-by: Luboslav Pivarc <lpivarc@redhat.com> Co-authored-by: Cory Snider <csnider@mirantis.com> Signed-off-by: Cory Snider <csnider@mirantis.com> (cherry picked from commit 42fa7a1) Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
thaJeztah
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thaJeztah
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neersighted
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Aug 15, 2023
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--security-opt=no-new-privileges#45491- What I did
Currently moby drops ep sets before the entrypoint is executed. This does mean that with combination of no-new-privileges the file capabilities stops working with non-root containers. This is undesired as the usability of such containers is harmed comparing to running root containers.
This commit therefore sets the effective/permitted set in order to allow use of file capabilities or libcap(3)/prctl(2) respectively with combination of no-new-privileges and without respectively.
For no-new-privileges the container will be able to obtain capabilities that are requested.
- How I did it
- How to verify it
Use the below as Dockerfile
docker run --security-opt=no-new-privileges --user=100 --cap-add sys_admin <tag of the build Dockerfile> capsh --printYou should see
Current: = cap_sys_admin+eprather thanCurrent:- Description for the changelog
- A picture of a cute animal (not mandatory but encouraged)