selinux: log policy capability state when a policy is loaded
Log the state of SELinux policy capabilities when a policy is loaded.
For each policy capability known to the kernel, log the policy capability
name and the value set in the policy. For policy capabilities that are
set in the loaded policy but unknown to the kernel, log the policy
capability index, since this is the only information presently available
in the policy.
Sample output with a policy created with a new capability defined
that is not known to the kernel:
SELinux: policy capability network_peer_controls=1
SELinux: policy capability open_perms=1
SELinux: policy capability extended_socket_class=1
SELinux: policy capability always_check_network=0
SELinux: policy capability cgroup_seclabel=0
SELinux: unknown policy capability 5
Resolves: https://github.com/SELinuxProject/selinux-kernel/issues/32
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Paul Moore <paul@paul-moore.com>
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 60d9b02..2dccba4 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -70,6 +70,15 @@
#include "ebitmap.h"
#include "audit.h"
+/* Policy capability names */
+char *selinux_policycap_names[__POLICYDB_CAPABILITY_MAX] = {
+ "network_peer_controls",
+ "open_perms",
+ "extended_socket_class",
+ "always_check_network",
+ "cgroup_seclabel"
+};
+
int selinux_policycap_netpeer;
int selinux_policycap_openperm;
int selinux_policycap_extsockclass;
@@ -1986,6 +1995,9 @@ static int convert_context(u32 key,
static void security_load_policycaps(void)
{
+ unsigned int i;
+ struct ebitmap_node *node;
+
selinux_policycap_netpeer = ebitmap_get_bit(&policydb.policycaps,
POLICYDB_CAPABILITY_NETPEER);
selinux_policycap_openperm = ebitmap_get_bit(&policydb.policycaps,
@@ -1997,6 +2009,17 @@ static void security_load_policycaps(void)
selinux_policycap_cgroupseclabel =
ebitmap_get_bit(&policydb.policycaps,
POLICYDB_CAPABILITY_CGROUPSECLABEL);
+
+ for (i = 0; i < ARRAY_SIZE(selinux_policycap_names); i++)
+ pr_info("SELinux: policy capability %s=%d\n",
+ selinux_policycap_names[i],
+ ebitmap_get_bit(&policydb.policycaps, i));
+
+ ebitmap_for_each_positive_bit(&policydb.policycaps, node, i) {
+ if (i >= ARRAY_SIZE(selinux_policycap_names))
+ pr_info("SELinux: unknown policy capability %u\n",
+ i);
+ }
}
static int security_preserve_bools(struct policydb *p);