rule update: Add kubelet to user_known_chmod_applications list

[rung]

Signed-off-by: Hiroki Suezawa suezawa@gmail.com

What type of PR is this?

/kind bug
/kind rule-update

Any specific area of the project related to this PR?

/area rules

What this PR does / why we need it:

• What this PR does
  • Add kubelet to user_known_chmod_applications list
• Why we need it
  • To reduce false positives
  • I got massive false positives of "Setuid or setgid bit is set via chmod", because kubelet uses chmod syscall every time mounting configmap, secret and so on.
  • Sample Flase Positive Log(GKE 1.14.8-gke.12 on Ubuntu)

output: "14:02:11.496777755: Notice Setuid or setgid bit is set via chmod (fd=<NA> filename=/var/lib/kubelet/pods/1029fd94-140a-11ea-93b8-42010a80001b/volumes/kubernetes.io~secret/heapster-token-5rjw6 mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|S_IRUSR|S_ISVTX|S_ISGID user=root process=kubelet command=kubelet --v=2 --cloud-provider=gce --experimental-check-node-capabilities-before-mount=true --experimental-mounter-path=/home/kubernetes/containerized_mounter/mounter --cert-dir=/var/lib/kubelet/pki/ --cni-bin-dir=/home/kubernetes/bin --kubeconfig=/var/lib/kubelet/kubeconfig --experimental-kernel-memcg-notification=true --max-pods=110 --non-masquerade-cidr=0.0.0.0/0 --network-plugin=kubenet --node-labels=beta.kubernetes.io/fluentd-ds-ready=true,cloud.google.com/gke-nodepool=default-pool,cloud.google.com/gke-os-distribution=ubuntu --volume-plugin-dir=/home/kubernetes/flexvolume --bootstrap-kubeconfig=/var/lib/kubelet/bootstrap-kubeconfig --node-status-max-images=25 --registry-qps=10 --registry-burst=20 --config /home/kubernetes/kubelet-config.yaml --pod-sysctls=net.core.somaxconn=1024,net.ipv4.conf.all.accept_redirects=0,net.ipv4.conf.all.forwarding=1,net.ipv4.conf.all.route_localnet=1,net.ipv4.conf.default.forwarding=1,net.ipv4.ip_forward=1,net.ipv4.tcp_fin_timeout=60,net.ipv4.tcp_keepalive_intvl=75,net.ipv4.tcp_keepalive_probes=9,net.ipv4.tcp_keepalive_time=7200,net.ipv4.tcp_max_syn_backlog=128,net.ipv4.tcp_max_tw_buckets=16384,net.ipv4.tcp_rmem=4096 87380 6291456,net.ipv4.tcp_syn_retries=6,net.ipv4.tcp_tw_reuse=0,net.ipv4.tcp_wmem=4096 16384 4194304,net.netfilter.nf_conntrack_generic_timeout=600,net.netfilter.nf_conntrack_tcp_timeout_close_wait=3600,net.netfilter.nf_conntrack_tcp_timeout_established=86400 container_id=host container_name=host image=<NA>:<NA>) k8s.ns=<NA> k8s.pod=<NA> container=host k8s.ns=<NA> k8s.pod=<NA> container=host k8s.ns=<NA> k8s.pod=<NA> container=host" 

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:
NONE

rules(list user_known_chmod_applications): add kubelet

[fntlnz]

/milestone 0.19.0

[fntlnz]

Good to see you again @rung !
LGTM

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fntlnz

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• rules/OWNERS [fntlnz]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[poiana]

LGTM label has been added.

Git tree hash: fd15f344187c7d864986c9ee4314ff85187d1534