Russell Coker <russell@xxxxxxxxxxxx> writes:
> Signed-off-by: Russell Coker <russell@xxxxxxxxxxxx>
>
> I think this resolves all issues Chris raised.
>
>
> Index: refpolicy-2.20200410/policy/modules/services/memlockd.fc
> ===================================================================
> --- /dev/null
> +++ refpolicy-2.20200410/policy/modules/services/memlockd.fc
> @@ -0,0 +1 @@
> +/usr/sbin/memlockd -- gen_context(system_u:object_r:memlockd_exec_t,s0)
> Index: refpolicy-2.20200410/policy/modules/services/memlockd.if
> ===================================================================
> --- /dev/null
> +++ refpolicy-2.20200410/policy/modules/services/memlockd.if
> @@ -0,0 +1,2 @@
> +## <summary>memory lock daemon, keeps important files in RAM.</summary>
> +
> Index: refpolicy-2.20200410/policy/modules/services/memlockd.te
> ===================================================================
> --- /dev/null
> +++ refpolicy-2.20200410/policy/modules/services/memlockd.te
> @@ -0,0 +1,37 @@
> +policy_module(memlockd, 1.0.0)
> +
> +########################################
> +#
> +# Declarations
> +#
> +
> +type memlockd_t;
> +type memlockd_exec_t;
> +init_daemon_domain(memlockd_t, memlockd_exec_t)
> +
> +########################################
> +#
> +# Local policy
> +#
> +
> +allow memlockd_t self:capability { setgid setuid ipc_lock };
> +allow memlockd_t self:fifo_file rw_file_perms;
> +allow memlockd_t self:unix_dgram_socket { create connect };
the unix dgram socket creating is probably redundant and implied with
logging_send_logs_msg() as journald uses dgram_sendto for logging?
> +
> +# cache /etc/shadow too
> +auth_read_shadow(memlockd_t)
Hmm since /etc/shadow is mode 000, how is memlock able to read this
without cap_dac_read_search access. is that implied?
> +auth_map_shadow(memlockd_t)
> +
> +corecmd_exec_all_executables(memlockd_t)
> +corecmd_exec_bin(memlockd_t)
> +corecmd_exec_shell(memlockd_t)
> +corecmd_read_all_executables(memlockd_t)
> +corecmd_search_bin(memlockd_t)
> +files_read_etc_files(memlockd_t)
> +libs_exec_ld_so(memlockd_t)
> +files_map_etc_files(memlockd_t)
> +
> +logging_send_syslog_msg(memlockd_t)
> +miscfiles_read_localization(memlockd_t)
> +
> +sysnet_mmap_read_config(memlockd_t)
> Index: refpolicy-2.20200410/policy/modules/system/sysnetwork.if
> ===================================================================
> --- refpolicy-2.20200410.orig/policy/modules/system/sysnetwork.if
> +++ refpolicy-2.20200410/policy/modules/system/sysnetwork.if
> @@ -391,6 +391,31 @@ interface(`sysnet_mmap_config_files',`
>
> #######################################
> ## <summary>
> +## map network config files.
> +## </summary>
> +## <desc>
> +## <p>
> +## Allow the specified domain to mmap the
> +## general network configuration files.
> +## </p>
> +## </desc>
> +## <param name="domain">
> +## <summary>
> +## Domain allowed access.
> +## </summary>
> +## </param>
> +#
> +interface(`sysnet_mmap_read_config',`
> + gen_require(`
> + type net_conf_t;
> + ')
> +
> + files_search_etc($1)
> + allow $1 net_conf_t:file mmap_read_file_perms;
> +')
> +
> +#######################################
> +## <summary>
> ## Do not audit attempts to read network config files.
> ## </summary>
> ## <param name="domain">
> Index: refpolicy-2.20200410/policy/modules/system/authlogin.if
> ===================================================================
> --- refpolicy-2.20200410.orig/policy/modules/system/authlogin.if
> +++ refpolicy-2.20200410/policy/modules/system/authlogin.if
> @@ -577,6 +577,23 @@ interface(`auth_read_shadow',`
>
> ########################################
> ## <summary>
> +## Map the shadow passwords file (/etc/shadow)
> +## </summary>
> +## <param name="domain">
> +## <summary>
> +## Domain allowed access.
> +## </summary>
> +## </param>
> +#
> +interface(`auth_map_shadow',`
> + gen_require(`
> + type shadow_t;
> + ')
> + allow $1 shadow_t:file map;
> +')
> +
> +########################################
> +## <summary>
> ## Pass shadow assertion for reading.
> ## </summary>
> ## <desc>
--
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Dominick Grift
