| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| 594 | 87.61% | 1 | 7.14% | |
| 58 | 8.55% | 5 | 35.71% | |
| 7 | 1.03% | 1 | 7.14% | |
| 4 | 0.59% | 2 | 14.29% | |
| 4 | 0.59% | 1 | 7.14% | |
| 4 | 0.59% | 1 | 7.14% | |
| 3 | 0.44% | 1 | 7.14% | |
| 3 | 0.44% | 1 | 7.14% | |
| 1 | 0.15% | 1 | 7.14% | |
| Total | 678 | 14 |
| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| James Morris | 594 | 87.61% | 1 | 7.14% |
| Paul Moore | 58 | 8.55% | 5 | 35.71% |
| David Howells | 7 | 1.03% | 1 | 7.14% |
| Stephen D. Smalley | 4 | 0.59% | 2 | 14.29% |
| pender01 | 4 | 0.59% | 1 | 7.14% |
| Lai Jiangshan | 4 | 0.59% | 1 | 7.14% |
| Thomas Gleixner | 3 | 0.44% | 1 | 7.14% |
| Tejun Heo | 3 | 0.44% | 1 | 7.14% |
| lihao | 1 | 0.15% | 1 | 7.14% |
| Total | 678 | 14 |
// SPDX-License-Identifier: GPL-2.0-only /* * Network port table * * SELinux must keep a mapping of network ports to labels/SIDs. This * mapping is maintained as part of the normal policy but a fast cache is * needed to reduce the lookup overhead. * * Author: Paul Moore <paul@paul-moore.com> * * This code is heavily based on the "netif" concept originally developed by * James Morris <jmorris@redhat.com> * (see security/selinux/netif.c for more information) */ /* * (c) Copyright Hewlett-Packard Development Company, L.P., 2008 */ #include <linux/types.h> #include <linux/rcupdate.h> #include <linux/list.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/in.h> #include <linux/in6.h> #include <linux/ip.h> #include <linux/ipv6.h> #include <net/ip.h> #include <net/ipv6.h> #include "netport.h" #include "objsec.h" #define SEL_NETPORT_HASH_SIZE 256 #define SEL_NETPORT_HASH_BKT_LIMIT 16 struct sel_netport_bkt { int size; struct list_head list; }; struct sel_netport { struct netport_security_struct psec; struct list_head list; struct rcu_head rcu; }; /* NOTE: we are using a combined hash table for both IPv4 and IPv6, the reason * for this is that I suspect most users will not make heavy use of both * address families at the same time so one table will usually end up wasted, * if this becomes a problem we can always add a hash table for each address * family later */ static DEFINE_SPINLOCK(sel_netport_lock); static struct sel_netport_bkt sel_netport_hash[SEL_NETPORT_HASH_SIZE]; /** * sel_netport_hashfn - Hashing function for the port table * @pnum: port number * * Description: * This is the hashing function for the port table, it returns the bucket * number for the given port. * */ static unsigned int sel_netport_hashfn(u16 pnum) { return (pnum & (SEL_NETPORT_HASH_SIZE - 1)); } /** * sel_netport_find - Search for a port record * @protocol: protocol * @pnum: port * * Description: * Search the network port table and return the matching record. If an entry * can not be found in the table return NULL. * */ static struct sel_netport *sel_netport_find(u8 protocol, u16 pnum) { unsigned int idx; struct sel_netport *port; idx = sel_netport_hashfn(pnum); list_for_each_entry_rcu(port, &sel_netport_hash[idx].list, list) if (port->psec.port == pnum && port->psec.protocol == protocol) return port; return NULL; } /** * sel_netport_insert - Insert a new port into the table * @port: the new port record * * Description: * Add a new port record to the network address hash table. * */ static void sel_netport_insert(struct sel_netport *port) { unsigned int idx; /* we need to impose a limit on the growth of the hash table so check * this bucket to make sure it is within the specified bounds */ idx = sel_netport_hashfn(port->psec.port); list_add_rcu(&port->list, &sel_netport_hash[idx].list); if (sel_netport_hash[idx].size == SEL_NETPORT_HASH_BKT_LIMIT) { struct sel_netport *tail; tail = list_entry( rcu_dereference_protected( list_tail_rcu(&sel_netport_hash[idx].list), lockdep_is_held(&sel_netport_lock)), struct sel_netport, list); list_del_rcu(&tail->list); kfree_rcu(tail, rcu); } else sel_netport_hash[idx].size++; } /** * sel_netport_sid_slow - Lookup the SID of a network address using the policy * @protocol: protocol * @pnum: port * @sid: port SID * * Description: * This function determines the SID of a network port by querying the security * policy. The result is added to the network port table to speedup future * queries. Returns zero on success, negative values on failure. * */ static int sel_netport_sid_slow(u8 protocol, u16 pnum, u32 *sid) { int ret; struct sel_netport *port; struct sel_netport *new; spin_lock_bh(&sel_netport_lock); port = sel_netport_find(protocol, pnum); if (port != NULL) { *sid = port->psec.sid; spin_unlock_bh(&sel_netport_lock); return 0; } ret = security_port_sid(&selinux_state, protocol, pnum, sid); if (ret != 0) goto out; new = kzalloc(sizeof(*new), GFP_ATOMIC); if (new) { new->psec.port = pnum; new->psec.protocol = protocol; new->psec.sid = *sid; sel_netport_insert(new); } out: spin_unlock_bh(&sel_netport_lock); if (unlikely(ret)) pr_warn("SELinux: failure in %s(), unable to determine network port label\n", __func__); return ret; } /** * sel_netport_sid - Lookup the SID of a network port * @protocol: protocol * @pnum: port * @sid: port SID * * Description: * This function determines the SID of a network port using the fastest method * possible. First the port table is queried, but if an entry can't be found * then the policy is queried and the result is added to the table to speedup * future queries. Returns zero on success, negative values on failure. * */ int sel_netport_sid(u8 protocol, u16 pnum, u32 *sid) { struct sel_netport *port; rcu_read_lock(); port = sel_netport_find(protocol, pnum); if (port != NULL) { *sid = port->psec.sid; rcu_read_unlock(); return 0; } rcu_read_unlock(); return sel_netport_sid_slow(protocol, pnum, sid); } /** * sel_netport_flush - Flush the entire network port table * * Description: * Remove all entries from the network address table. * */ void sel_netport_flush(void) { unsigned int idx; struct sel_netport *port, *port_tmp; spin_lock_bh(&sel_netport_lock); for (idx = 0; idx < SEL_NETPORT_HASH_SIZE; idx++) { list_for_each_entry_safe(port, port_tmp, &sel_netport_hash[idx].list, list) { list_del_rcu(&port->list); kfree_rcu(port, rcu); } sel_netport_hash[idx].size = 0; } spin_unlock_bh(&sel_netport_lock); } static __init int sel_netport_init(void) { int iter; if (!selinux_enabled_boot) return 0; for (iter = 0; iter < SEL_NETPORT_HASH_SIZE; iter++) { INIT_LIST_HEAD(&sel_netport_hash[iter].list); sel_netport_hash[iter].size = 0; } return 0; } __initcall(sel_netport_init);