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lxc set's up a new session keyring for every container by default. If executed on an SELinux enabled system, by default, the keyring inherits the label of the creating process. If executed with the currently available SELinux policy, this means that the keyring is labeled with the lxc_t type. Applications inside the container, however, might expect that the keyring is labeled with a certain context (and will fail to access the keyring if it's not explicitly allowed in the global policy). This patch introduces the config option lxc.selinux.context.keyring which enables to specify the label of the newly created keyring. That is, the keyring can be labeled with the label expected by the started application. Signed-off-by: Maximilian Blenk <Maximilian.Blenk@bmw.de>
92 lines
2.8 KiB
Plaintext
92 lines
2.8 KiB
Plaintext
#
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# SELinux policy for LXC for RHEL/CentOS/Oracle 6.5.
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# It attempts to restrict the container to the same amount of access
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# as an unprivileged user. To build and insert this policy module:
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#
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# make -f /usr/share/selinux/devel/Makefile lxc.pp
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# semodule -i lxc.pp
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#
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# In your container's lxc config:
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# lxc.selinux.context = system_u:system_r:lxc_t:s0:c62,c86,c150,c228
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#
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# Ensure your container's rootfs files are labeled:
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# chcon -R system_u:object_r:lxc_file_t:s0:c62,c86,c150,c228 /path/to/rootfs
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#
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# To keep containers separated from each other, you should vary the MCS
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# portion of the contexts above to be a unique set of values for each
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# container, each MCS compartment can be a number from 0-1023.
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#
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policy_module(lxc,0.35)
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userdom_unpriv_user_template(lxc)
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type lxc_file_t;
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files_type(lxc_file_t);
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role system_r types { lxc_t lxc_file_t };
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gen_require(`
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type devpts_t;
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type proc_t;
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type ssh_port_t;
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type sysctl_kernel_t;
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type sysctl_modprobe_t;
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type sysctl_net_t;
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type tmpfs_t;
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type unconfined_t;
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class filesystem { relabelfrom unmount };
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class tcp_socket name_bind;
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class udp_socket name_bind;
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');
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# So lxc can transition to lxc_t on exec
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allow unconfined_t lxc_t:process transition;
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can_exec(lxc_t, lxc_file_t)
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# So lxc can dyntransition to lxc_t for attach executing a function
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allow unconfined_t lxc_t:process dyntransition;
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# So lxc-start can relabel the pty allocated for the console
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allow lxc_file_t devpts_t:filesystem associate;
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# So container can mount /dev/shm and relabel it
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allow lxc_t tmpfs_t:filesystem relabelfrom;
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# Allow all access to an lxc_file_t type; devices can be restricted
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# with the device cgroup, they are not here
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allow lxc_t lxc_file_t:file *;
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allow lxc_t lxc_file_t:lnk_file *;
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allow lxc_t lxc_file_t:chr_file *;
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allow lxc_t lxc_file_t:blk_file *;
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allow lxc_t lxc_file_t:sock_file *;
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allow lxc_t lxc_file_t:fifo_file *;
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allow lxc_t lxc_file_t:socket *;
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allow lxc_t lxc_file_t:dir *;
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allow lxc_t lxc_file_t:filesystem unmount;
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fs_unmount_all_fs(lxc_t)
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allow lxc_t proc_t:dir mounton;
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allow lxc_t proc_t:filesystem mount;
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allow lxc_t tmpfs_t:filesystem mount;
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allow lxc_t self:capability { dac_override dac_read_search fsetid ipc_lock net_admin net_bind_service net_broadcast net_raw sys_admin sys_boot sys_tty_config };
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allow lxc_t sysctl_net_t:file write;
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allow lxc_t ssh_port_t:tcp_socket name_bind;
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corenet_tcp_connect_all_ports(lxc_t)
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corenet_tcp_bind_all_ports(lxc_t)
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corenet_udp_bind_all_ports(lxc_t)
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# Needed for ifup/ip/dhcp
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allow lxc_t self:packet_socket create_socket_perms;
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allow lxc_t self:rawip_socket create_socket_perms;
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allow lxc_t self:netlink_route_socket create_netlink_socket_perms;
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# Needed to set label that the keyring will be created with
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allow lxc_t self:process { setkeycreate };
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dontaudit lxc_t sysctl_kernel_t:file write;
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dontaudit lxc_t sysctl_modprobe_t:file write;
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