On Wed, Jul 21, 2021 at 2:46 PM Sujithra P <sujithrap@xxxxxxxxx> wrote: > > Hi SELinux Experts, > > The following issue is described in the below post as well. > https://github.com/containers/container-selinux/issues/141 > > Occasionally running into the following selinux denials for docker > > type=AVC msg=audit(1626732057.636:4583): avc: denied { associate } > for pid=57450 comm="dockerd" name="/" dev="tmpfs" ino=150014 > scontext=system_u:object_r:container_file_t:s0:c263,c914 > tcontext=system_u:object_r:lib_t:s0 tclass=filesystem permissive=0 > > type=AVC msg=audit(1626812823.170:9434): avc: denied { associate } > for pid=20027 comm="dockerd" name="/" dev="tmpfs" ino=198147 > scontext=system_u:object_r:container_file_t:s0:c578,c672 > tcontext=system_u:object_r:locale_t:s0 tclass=filesystem permissive=0 > > > level=error msg="Handler for POST > /v1.40/containers/a3a875e7896384e3bff53b8317e91ed4301a13957f42187eb227f28e09bd877c/start > returned error: error setting label on mount source > '/var/lib/kubelet/pods/f7cee5b2-bcd9-4aa1-9d67-c75b677ba2a1/volumes/kubernetes.io~secret/secret': > failed to set file label on > /var/lib/kubelet/pods/f7cee5b2-bcd9-4aa1-9d67-c75b677ba2a1/volumes/kubernetes.io~secret/secret: > permission denied" > > > Docker is not able to set labels for these tmpfs mounts because they > end up having wrong labels when they are created (sometimes > "locale_t", sometimes "lib_t" which of course is not the > default/correct context for tmpfs fs). > Apparently semodule -R and deleting these tmps files or reboot of the > node fixes the problem. > Not sure what is causing the tmpfs mounts to get wrong labels in the > first place. > > Everything seems to be fine to begin with, but as the system keeps > scheduling pods on the node, this behavior is observed sometimes (not > consistent always). > > > OS Details: > > NAME="CentOS Linux" > VERSION="8 (Core)" > ID="centos" > ID_LIKE="rhel fedora" > VERSION_ID="8" > PLATFORM_ID="platform:el8" > PRETTY_NAME="CentOS Linux 8 (Core)" > > Docker Version: > Client: Docker Engine - Community > Version: 19.03.13 > API version: 1.40 > Go version: go1.13.15 > Git commit: 4484c46d9d > Built: Wed Sep 16 17:02:36 2020 > OS/Arch: linux/amd64 > Experimental: false > > Kubernetes Version* > v1.20.8-gke.1500 > > > Any help on how to debug this issue would be greatly appreciated. This sounds like it might be a problem with CentOS and/or your Docker install, have you tried talking with the RH/CentOS folks about this problem? We focus mostly on upstream issues here and it isn't clear to me at this moment that this is an upstream issue. -- paul moore www.paul-moore.com
