Re: [PATCH testsuite v6] policy: use the kernel_request_load_module() interface

[Stephen Smalley <sds@tycho.nsa.gov>]

On 11/28/19 9:08 AM, Ondrej Mosnacek wrote:
> ...instead of open-coding the rules. Also define a fallback to allow the
> policy to build even if the interface is not defined.
> 
> Fixes: f5e5a0b8d005 ("selinux-testsuite: Add key_socket tests")
> Cc: Richard Haines <richard_c_haines@btinternet.com>
> Suggested-by: Stephen Smalley <sds@tycho.nsa.gov>
> Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>

Acked-by: Stephen Smalley <sds@tycho.nsa.gov>

> ---
> 
> Change in v6: avoid apostrophes in comments
> Change in v5: call the macro only once for the whole domain
> Change in v4: fix copy-paste mistakes spotted by Richard
> Change in v3: use different approach as suggested by Stephen
> Change in v2: update also tests/Makefile for consistency
> 
>   policy/test_key_socket.te | 8 +++-----
>   policy/test_policy.if     | 8 +++++++-
>   2 files changed, 10 insertions(+), 6 deletions(-)
> 
> diff --git a/policy/test_key_socket.te b/policy/test_key_socket.te
> index cde426b..64d2cee 100644
> --- a/policy/test_key_socket.te
> +++ b/policy/test_key_socket.te
> @@ -12,8 +12,6 @@ typeattribute test_key_sock_t keysockdomain;
>   # key_socket rules:
>   allow test_key_sock_t self:capability { net_admin };
>   allow test_key_sock_t self:key_socket { create write read setopt };
> -# For CONFIG_NET_KEY=m
> -allow test_key_sock_t kernel_t:system { module_request };
>   
>   ################## Deny capability { net_admin } ##########################
>   #
> @@ -29,7 +27,6 @@ typeattribute test_key_sock_no_net_admin_t testdomain;
>   typeattribute test_key_sock_no_net_admin_t keysockdomain;
>   
>   allow test_key_sock_no_net_admin_t self:key_socket { create write read setopt };
> -allow test_key_sock_no_net_admin_t kernel_t:system { module_request };
>   
>   ####################### Deny key_socket { create } ##########################
>   type test_key_sock_no_create_t;
> @@ -50,7 +47,6 @@ typeattribute test_key_sock_no_write_t keysockdomain;
>   
>   allow test_key_sock_no_write_t self:capability { net_admin };
>   allow test_key_sock_no_write_t self:key_socket { create read setopt };
> -allow test_key_sock_no_write_t kernel_t:system { module_request };
>   
>   ####################### Deny key_socket { read } ##########################
>   type test_key_sock_no_read_t;
> @@ -61,10 +57,12 @@ typeattribute test_key_sock_no_read_t keysockdomain;
>   
>   allow test_key_sock_no_read_t self:capability { net_admin };
>   allow test_key_sock_no_read_t self:key_socket { create write setopt };
> -allow test_key_sock_no_read_t kernel_t:system { module_request };
>   
>   #
>   ########### Allow these domains to be entered from sysadm domain ############
>   #
>   miscfiles_domain_entry_test_files(keysockdomain)
>   userdom_sysadm_entry_spec_domtrans_to(keysockdomain)
> +
> +# For CONFIG_NET_KEY=m
> +kernel_request_load_module(keysockdomain)
> diff --git a/policy/test_policy.if b/policy/test_policy.if
> index e1175e8..cefc8fb 100644
> --- a/policy/test_policy.if
> +++ b/policy/test_policy.if
> @@ -76,9 +76,15 @@ interface(`mount_rw_pid_files', `
>   ')
>   ')
>   
> -# Refpolicy doesn't have admin_home_t - assume /root will be user_home_dir_t.
> +# Refpolicy does not have admin_home_t - assume /root will be user_home_dir_t.
>   ifdef(`userdom_search_admin_dir', `', ` dnl
>   interface(`userdom_search_admin_dir', `
>       userdom_search_user_home_content($1)
>   ')
>   ')
> +
> +# If the macro is not defined, then most probably module_request permission
> +# is just not supported (and relevant operations should be just allowed).
> +ifdef(`kernel_request_load_module', `', ` dnl
> +interface(`kernel_request_load_module', `')
> +')
>