diff options
Diffstat (limited to 'net/netlabel')
| -rw-r--r-- | net/netlabel/netlabel_cipso_v4.c | 5 | ||||
| -rw-r--r-- | net/netlabel/netlabel_domainhash.c | 10 | ||||
| -rw-r--r-- | net/netlabel/netlabel_kapi.c | 21 | ||||
| -rw-r--r-- | net/netlabel/netlabel_mgmt.c | 65 | ||||
| -rw-r--r-- | net/netlabel/netlabel_mgmt.h | 5 | ||||
| -rw-r--r-- | net/netlabel/netlabel_user.c | 8 |
6 files changed, 105 insertions, 9 deletions
diff --git a/net/netlabel/netlabel_cipso_v4.c b/net/netlabel/netlabel_cipso_v4.c index 24b660f16ce3..c060e3f991f1 100644 --- a/net/netlabel/netlabel_cipso_v4.c +++ b/net/netlabel/netlabel_cipso_v4.c @@ -41,6 +41,7 @@ #include "netlabel_user.h" #include "netlabel_cipso_v4.h" +#include "netlabel_mgmt.h" /* Argument struct for cipso_v4_doi_walk() */ struct netlbl_cipsov4_doiwalk_arg { @@ -419,6 +420,8 @@ static int netlbl_cipsov4_add(struct sk_buff *skb, struct genl_info *info) ret_val = netlbl_cipsov4_add_pass(info); break; } + if (ret_val == 0) + netlbl_mgmt_protocount_inc(); audit_buf = netlbl_audit_start_common(AUDIT_MAC_CIPSOV4_ADD, &audit_info); @@ -694,6 +697,8 @@ static int netlbl_cipsov4_remove(struct sk_buff *skb, struct genl_info *info) ret_val = cipso_v4_doi_remove(doi, &audit_info, netlbl_cipsov4_doi_free); + if (ret_val == 0) + netlbl_mgmt_protocount_dec(); audit_buf = netlbl_audit_start_common(AUDIT_MAC_CIPSOV4_DEL, &audit_info); diff --git a/net/netlabel/netlabel_domainhash.c b/net/netlabel/netlabel_domainhash.c index f46a0aeec44f..b6c844b7e1c1 100644 --- a/net/netlabel/netlabel_domainhash.c +++ b/net/netlabel/netlabel_domainhash.c @@ -126,7 +126,9 @@ static struct netlbl_dom_map *netlbl_domhsh_search(const char *domain, u32 def) if (domain != NULL) { bkt = netlbl_domhsh_hash(domain); - list_for_each_entry_rcu(iter, &netlbl_domhsh->tbl[bkt], list) + list_for_each_entry_rcu(iter, + &rcu_dereference(netlbl_domhsh)->tbl[bkt], + list) if (iter->valid && strcmp(iter->domain, domain) == 0) return iter; } @@ -227,7 +229,7 @@ int netlbl_domhsh_add(struct netlbl_dom_map *entry, spin_lock(&netlbl_domhsh_lock); if (netlbl_domhsh_search(entry->domain, 0) == NULL) list_add_tail_rcu(&entry->list, - &netlbl_domhsh->tbl[bkt]); + &rcu_dereference(netlbl_domhsh)->tbl[bkt]); else ret_val = -EEXIST; spin_unlock(&netlbl_domhsh_lock); @@ -423,8 +425,8 @@ int netlbl_domhsh_walk(u32 *skip_bkt, iter_bkt < rcu_dereference(netlbl_domhsh)->size; iter_bkt++, chain_cnt = 0) { list_for_each_entry_rcu(iter_entry, - &netlbl_domhsh->tbl[iter_bkt], - list) + &rcu_dereference(netlbl_domhsh)->tbl[iter_bkt], + list) if (iter_entry->valid) { if (chain_cnt++ < *skip_chain) continue; diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c index b165712aaa70..4f50949722a9 100644 --- a/net/netlabel/netlabel_kapi.c +++ b/net/netlabel/netlabel_kapi.c @@ -38,6 +38,7 @@ #include "netlabel_domainhash.h" #include "netlabel_unlabeled.h" #include "netlabel_user.h" +#include "netlabel_mgmt.h" /* * Security Attribute Functions @@ -245,6 +246,26 @@ int netlbl_secattr_catmap_setrng(struct netlbl_lsm_secattr_catmap *catmap, */ /** + * netlbl_enabled - Determine if the NetLabel subsystem is enabled + * + * Description: + * The LSM can use this function to determine if it should use NetLabel + * security attributes in it's enforcement mechanism. Currently, NetLabel is + * considered to be enabled when it's configuration contains a valid setup for + * at least one labeled protocol (i.e. NetLabel can understand incoming + * labeled packets of at least one type); otherwise NetLabel is considered to + * be disabled. + * + */ +int netlbl_enabled(void) +{ + /* At some point we probably want to expose this mechanism to the user + * as well so that admins can toggle NetLabel regardless of the + * configuration */ + return (netlbl_mgmt_protocount_value() > 0 ? 1 : 0); +} + +/** * netlbl_socket_setattr - Label a socket using the correct protocol * @sk: the socket to label * @secattr: the security attributes diff --git a/net/netlabel/netlabel_mgmt.c b/net/netlabel/netlabel_mgmt.c index e00fc219c72b..5315dacc5222 100644 --- a/net/netlabel/netlabel_mgmt.c +++ b/net/netlabel/netlabel_mgmt.c @@ -42,6 +42,10 @@ #include "netlabel_user.h" #include "netlabel_mgmt.h" +/* NetLabel configured protocol count */ +static DEFINE_SPINLOCK(netlabel_mgmt_protocount_lock); +static u32 netlabel_mgmt_protocount = 0; + /* Argument struct for netlbl_domhsh_walk() */ struct netlbl_domhsh_walk_arg { struct netlink_callback *nl_cb; @@ -67,6 +71,67 @@ static const struct nla_policy netlbl_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = { }; /* + * NetLabel Misc Managment Functions + */ + +/** + * netlbl_mgmt_protocount_inc - Increment the configured labeled protocol count + * + * Description: + * Increment the number of labeled protocol configurations in the current + * NetLabel configuration. Keep track of this for use in determining if + * NetLabel label enforcement should be active/enabled or not in the LSM. + * + */ +void netlbl_mgmt_protocount_inc(void) +{ + rcu_read_lock(); + spin_lock(&netlabel_mgmt_protocount_lock); + netlabel_mgmt_protocount++; + spin_unlock(&netlabel_mgmt_protocount_lock); + rcu_read_unlock(); +} + +/** + * netlbl_mgmt_protocount_dec - Decrement the configured labeled protocol count + * + * Description: + * Decrement the number of labeled protocol configurations in the current + * NetLabel configuration. Keep track of this for use in determining if + * NetLabel label enforcement should be active/enabled or not in the LSM. + * + */ +void netlbl_mgmt_protocount_dec(void) +{ + rcu_read_lock(); + spin_lock(&netlabel_mgmt_protocount_lock); + if (netlabel_mgmt_protocount > 0) + netlabel_mgmt_protocount--; + spin_unlock(&netlabel_mgmt_protocount_lock); + rcu_read_unlock(); +} + +/** + * netlbl_mgmt_protocount_value - Return the number of configured protocols + * + * Description: + * Return the number of labeled protocols in the current NetLabel + * configuration. This value is useful in determining if NetLabel label + * enforcement should be active/enabled or not in the LSM. + * + */ +u32 netlbl_mgmt_protocount_value(void) +{ + u32 val; + + rcu_read_lock(); + val = netlabel_mgmt_protocount; + rcu_read_unlock(); + + return val; +} + +/* * NetLabel Command Handlers */ diff --git a/net/netlabel/netlabel_mgmt.h b/net/netlabel/netlabel_mgmt.h index 3642d3bfc8eb..ccb2b3923591 100644 --- a/net/netlabel/netlabel_mgmt.h +++ b/net/netlabel/netlabel_mgmt.h @@ -168,4 +168,9 @@ enum { /* NetLabel protocol functions */ int netlbl_mgmt_genl_init(void); +/* NetLabel misc management functions */ +void netlbl_mgmt_protocount_inc(void); +void netlbl_mgmt_protocount_dec(void); +u32 netlbl_mgmt_protocount_value(void); + #endif diff --git a/net/netlabel/netlabel_user.c b/net/netlabel/netlabel_user.c index 42f12bd65964..85a96a3fddaa 100644 --- a/net/netlabel/netlabel_user.c +++ b/net/netlabel/netlabel_user.c @@ -46,10 +46,6 @@ #include "netlabel_cipso_v4.h" #include "netlabel_user.h" -/* do not do any auditing if audit_enabled == 0, see kernel/audit.c for - * details */ -extern int audit_enabled; - /* * NetLabel NETLINK Setup Functions */ @@ -117,8 +113,10 @@ struct audit_buffer *netlbl_audit_start_common(int type, if (audit_info->secid != 0 && security_secid_to_secctx(audit_info->secid, &secctx, - &secctx_len) == 0) + &secctx_len) == 0) { audit_log_format(audit_buf, " subj=%s", secctx); + security_release_secctx(secctx, secctx_len); + } return audit_buf; } |