Allow kubelet_t to create a sock file kubelet_var_lib_t

We want to allow container_device_plugin_t to communicate with kublet_t over a kubelet_var_lib_t socket. Signed-off-by: Daniel J Walsh <[email protected]>
containers · Sep 16, 2024 · 0d2ca1c · 0d2ca1c
1 parent 45cb5d0
commit 0d2ca1c
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Showing 2 changed files with 16 additions and 4 deletions.
diff --git a/container.fc b/container.fc
@@ -131,7 +131,7 @@ HOME_DIR/\.local/share/containers/storage/volumes/[^/]*/.*	gen_context(system_u:
 /var/lib/kubernetes/pods(/.*)?	gen_context(system_u:object_r:container_file_t,s0)
 
 /var/lib/kubelet(/.*)?		gen_context(system_u:object_r:container_var_lib_t,s0)
-/var/lib/kubelet/pod-resources/kubelet.sock		gen_context(system_u:object_r:container_file_t,s0)
+/var/lib/kubelet/pod-resources/kubelet.sock	gen_context(system_u:object_r:kubelet_var_lib_t,s0)
 /var/lib/docker-latest(/.*)?		gen_context(system_u:object_r:container_var_lib_t,s0)
 /var/lib/docker-latest/.*/config\.env	gen_context(system_u:object_r:container_ro_file_t,s0)
 /var/lib/docker-latest/containers/.*/.*\.log	gen_context(system_u:object_r:container_log_t,s0)

diff --git a/container.te b/container.te
@@ -1,4 +1,4 @@
-policy_module(container, 2.233.0)
+policy_module(container, 2.234.0)
 
 gen_require(`
 	class passwd rootok;
@@ -1450,13 +1450,13 @@ allow container_engine_t sysctl_t:{dir file} mounton;
 allow container_engine_t fusefs_t:dir { relabelfrom relabelto };
 allow container_engine_t fusefs_t:file relabelto;
 allow container_engine_t kernel_t:system module_request;
-allow container_engine_t null_device_t:chr_file { mounton setattr };
+allow container_engine_t null_device_t:chr_file { mounton setattr_chr_file_perms };
 allow container_engine_t random_device_t:chr_file mounton;
 allow container_engine_t self:netlink_tcpdiag_socket nlmsg_read;
 allow container_engine_t urandom_device_t:chr_file mounton;
 allow container_engine_t zero_device_t:chr_file mounton;
 allow container_engine_t container_file_t:sock_file mounton;
-allow container_engine_t container_runtime_tmpfs_t:dir ioctl;
+allow container_engine_t container_runtime_tmpfs_t:dir list_dir_perms;
 
 manage_chr_files_pattern(container_engine_t, fusefs_t, fusefs_t)
 
@@ -1485,6 +1485,17 @@ application_executable_file(kubelet_exec_t)
 can_exec(container_runtime_t, kubelet_exec_t)
 allow kubelet_t kubelet_exec_t:file entrypoint;
 
+type kubelet_var_lib_t;
+files_type(kubelet_var_lib_t)
+
+manage_dirs_pattern(kubelet_t, kubelet_var_lib_t, kubelet_var_lib_t)
+manage_files_pattern(kubelet_t, kubelet_var_lib_t, kubelet_var_lib_t)
+manage_lnk_files_pattern(kubelet_t, kubelet_var_lib_t, kubelet_var_lib_t)
+manage_sock_files_pattern(kubelet_t, kubelet_var_lib_t, kubelet_var_lib_t)
+
+files_var_lib_filetrans(kubelet_t, kubelet_var_lib_t, sock_file, "kubelet.sock")
+filetrans_pattern(kubelet_t, container_var_lib_t, kubelet_var_lib_t, sock_file, "kubelet.sock")
+
 ifdef(`enable_mcs',`
 	init_ranged_daemon_domain(kubelet_t, kubelet_exec_t, s0 - mcs_systemhigh)
 ')
@@ -1523,6 +1534,7 @@ allow container_device_plugin_t device_node:chr_file rw_chr_file_perms;
 dev_rw_sysfs(container_device_plugin_t)
 kernel_read_debugfs(container_device_plugin_t)
 container_kubelet_stream_connect(container_device_plugin_t)
+stream_connect_pattern(container_device_plugin_t, container_var_lib_t,  kubelet_var_lib_t, kubelet_t)
 
 # Standard container which needs to be allowed to use any device and
 # modify kubelet configuration