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-rw-r--r--net/netlabel/netlabel_mgmt.c410
1 files changed, 304 insertions, 106 deletions
diff --git a/net/netlabel/netlabel_mgmt.c b/net/netlabel/netlabel_mgmt.c
index 44be5d5261f4..ee769ecaa13c 100644
--- a/net/netlabel/netlabel_mgmt.c
+++ b/net/netlabel/netlabel_mgmt.c
@@ -10,7 +10,7 @@
10 */ 10 */
11 11
12/* 12/*
13 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006 13 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
14 * 14 *
15 * This program is free software; you can redistribute it and/or modify 15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by 16 * it under the terms of the GNU General Public License as published by
@@ -32,9 +32,13 @@
32#include <linux/socket.h> 32#include <linux/socket.h>
33#include <linux/string.h> 33#include <linux/string.h>
34#include <linux/skbuff.h> 34#include <linux/skbuff.h>
35#include <linux/in.h>
36#include <linux/in6.h>
35#include <net/sock.h> 37#include <net/sock.h>
36#include <net/netlink.h> 38#include <net/netlink.h>
37#include <net/genetlink.h> 39#include <net/genetlink.h>
40#include <net/ip.h>
41#include <net/ipv6.h>
38#include <net/netlabel.h> 42#include <net/netlabel.h>
39#include <net/cipso_ipv4.h> 43#include <net/cipso_ipv4.h>
40#include <asm/atomic.h> 44#include <asm/atomic.h>
@@ -71,86 +75,337 @@ static const struct nla_policy netlbl_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = {
71}; 75};
72 76
73/* 77/*
74 * NetLabel Command Handlers 78 * Helper Functions
75 */ 79 */
76 80
77/** 81/**
78 * netlbl_mgmt_add - Handle an ADD message 82 * netlbl_mgmt_add - Handle an ADD message
79 * @skb: the NETLINK buffer
80 * @info: the Generic NETLINK info block 83 * @info: the Generic NETLINK info block
84 * @audit_info: NetLabel audit information
81 * 85 *
82 * Description: 86 * Description:
83 * Process a user generated ADD message and add the domains from the message 87 * Helper function for the ADD and ADDDEF messages to add the domain mappings
84 * to the hash table. See netlabel.h for a description of the message format. 88 * from the message to the hash table. See netlabel.h for a description of the
85 * Returns zero on success, negative values on failure. 89 * message format. Returns zero on success, negative values on failure.
86 * 90 *
87 */ 91 */
88static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info) 92static int netlbl_mgmt_add_common(struct genl_info *info,
93 struct netlbl_audit *audit_info)
89{ 94{
90 int ret_val = -EINVAL; 95 int ret_val = -EINVAL;
91 struct netlbl_dom_map *entry = NULL; 96 struct netlbl_dom_map *entry = NULL;
92 size_t tmp_size; 97 struct netlbl_domaddr_map *addrmap = NULL;
98 struct cipso_v4_doi *cipsov4 = NULL;
93 u32 tmp_val; 99 u32 tmp_val;
94 struct netlbl_audit audit_info;
95
96 if (!info->attrs[NLBL_MGMT_A_DOMAIN] ||
97 !info->attrs[NLBL_MGMT_A_PROTOCOL])
98 goto add_failure;
99
100 netlbl_netlink_auditinfo(skb, &audit_info);
101 100
102 entry = kzalloc(sizeof(*entry), GFP_KERNEL); 101 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
103 if (entry == NULL) { 102 if (entry == NULL) {
104 ret_val = -ENOMEM; 103 ret_val = -ENOMEM;
105 goto add_failure; 104 goto add_failure;
106 } 105 }
107 tmp_size = nla_len(info->attrs[NLBL_MGMT_A_DOMAIN]);
108 entry->domain = kmalloc(tmp_size, GFP_KERNEL);
109 if (entry->domain == NULL) {
110 ret_val = -ENOMEM;
111 goto add_failure;
112 }
113 entry->type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]); 106 entry->type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]);
114 nla_strlcpy(entry->domain, info->attrs[NLBL_MGMT_A_DOMAIN], tmp_size); 107 if (info->attrs[NLBL_MGMT_A_DOMAIN]) {
108 size_t tmp_size = nla_len(info->attrs[NLBL_MGMT_A_DOMAIN]);
109 entry->domain = kmalloc(tmp_size, GFP_KERNEL);
110 if (entry->domain == NULL) {
111 ret_val = -ENOMEM;
112 goto add_failure;
113 }
114 nla_strlcpy(entry->domain,
115 info->attrs[NLBL_MGMT_A_DOMAIN], tmp_size);
116 }
117
118 /* NOTE: internally we allow/use a entry->type value of
119 * NETLBL_NLTYPE_ADDRSELECT but we don't currently allow users
120 * to pass that as a protocol value because we need to know the
121 * "real" protocol */
115 122
116 switch (entry->type) { 123 switch (entry->type) {
117 case NETLBL_NLTYPE_UNLABELED: 124 case NETLBL_NLTYPE_UNLABELED:
118 ret_val = netlbl_domhsh_add(entry, &audit_info);
119 break; 125 break;
120 case NETLBL_NLTYPE_CIPSOV4: 126 case NETLBL_NLTYPE_CIPSOV4:
121 if (!info->attrs[NLBL_MGMT_A_CV4DOI]) 127 if (!info->attrs[NLBL_MGMT_A_CV4DOI])
122 goto add_failure; 128 goto add_failure;
123 129
124 tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]); 130 tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]);
125 /* We should be holding a rcu_read_lock() here while we hold 131 cipsov4 = cipso_v4_doi_getdef(tmp_val);
126 * the result but since the entry will always be deleted when 132 if (cipsov4 == NULL)
127 * the CIPSO DOI is deleted we aren't going to keep the
128 * lock. */
129 rcu_read_lock();
130 entry->type_def.cipsov4 = cipso_v4_doi_getdef(tmp_val);
131 if (entry->type_def.cipsov4 == NULL) {
132 rcu_read_unlock();
133 goto add_failure; 133 goto add_failure;
134 } 134 entry->type_def.cipsov4 = cipsov4;
135 ret_val = netlbl_domhsh_add(entry, &audit_info);
136 rcu_read_unlock();
137 break; 135 break;
138 default: 136 default:
139 goto add_failure; 137 goto add_failure;
140 } 138 }
139
140 if (info->attrs[NLBL_MGMT_A_IPV4ADDR]) {
141 struct in_addr *addr;
142 struct in_addr *mask;
143 struct netlbl_domaddr4_map *map;
144
145 addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL);
146 if (addrmap == NULL) {
147 ret_val = -ENOMEM;
148 goto add_failure;
149 }
150 INIT_LIST_HEAD(&addrmap->list4);
151 INIT_LIST_HEAD(&addrmap->list6);
152
153 if (nla_len(info->attrs[NLBL_MGMT_A_IPV4ADDR]) !=
154 sizeof(struct in_addr)) {
155 ret_val = -EINVAL;
156 goto add_failure;
157 }
158 if (nla_len(info->attrs[NLBL_MGMT_A_IPV4MASK]) !=
159 sizeof(struct in_addr)) {
160 ret_val = -EINVAL;
161 goto add_failure;
162 }
163 addr = nla_data(info->attrs[NLBL_MGMT_A_IPV4ADDR]);
164 mask = nla_data(info->attrs[NLBL_MGMT_A_IPV4MASK]);
165
166 map = kzalloc(sizeof(*map), GFP_KERNEL);
167 if (map == NULL) {
168 ret_val = -ENOMEM;
169 goto add_failure;
170 }
171 map->list.addr = addr->s_addr & mask->s_addr;
172 map->list.mask = mask->s_addr;
173 map->list.valid = 1;
174 map->type = entry->type;
175 if (cipsov4)
176 map->type_def.cipsov4 = cipsov4;
177
178 ret_val = netlbl_af4list_add(&map->list, &addrmap->list4);
179 if (ret_val != 0) {
180 kfree(map);
181 goto add_failure;
182 }
183
184 entry->type = NETLBL_NLTYPE_ADDRSELECT;
185 entry->type_def.addrsel = addrmap;
186#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
187 } else if (info->attrs[NLBL_MGMT_A_IPV6ADDR]) {
188 struct in6_addr *addr;
189 struct in6_addr *mask;
190 struct netlbl_domaddr6_map *map;
191
192 addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL);
193 if (addrmap == NULL) {
194 ret_val = -ENOMEM;
195 goto add_failure;
196 }
197 INIT_LIST_HEAD(&addrmap->list4);
198 INIT_LIST_HEAD(&addrmap->list6);
199
200 if (nla_len(info->attrs[NLBL_MGMT_A_IPV6ADDR]) !=
201 sizeof(struct in6_addr)) {
202 ret_val = -EINVAL;
203 goto add_failure;
204 }
205 if (nla_len(info->attrs[NLBL_MGMT_A_IPV6MASK]) !=
206 sizeof(struct in6_addr)) {
207 ret_val = -EINVAL;
208 goto add_failure;
209 }
210 addr = nla_data(info->attrs[NLBL_MGMT_A_IPV6ADDR]);
211 mask = nla_data(info->attrs[NLBL_MGMT_A_IPV6MASK]);
212
213 map = kzalloc(sizeof(*map), GFP_KERNEL);
214 if (map == NULL) {
215 ret_val = -ENOMEM;
216 goto add_failure;
217 }
218 ipv6_addr_copy(&map->list.addr, addr);
219 map->list.addr.s6_addr32[0] &= mask->s6_addr32[0];
220 map->list.addr.s6_addr32[1] &= mask->s6_addr32[1];
221 map->list.addr.s6_addr32[2] &= mask->s6_addr32[2];
222 map->list.addr.s6_addr32[3] &= mask->s6_addr32[3];
223 ipv6_addr_copy(&map->list.mask, mask);
224 map->list.valid = 1;
225 map->type = entry->type;
226
227 ret_val = netlbl_af6list_add(&map->list, &addrmap->list6);
228 if (ret_val != 0) {
229 kfree(map);
230 goto add_failure;
231 }
232
233 entry->type = NETLBL_NLTYPE_ADDRSELECT;
234 entry->type_def.addrsel = addrmap;
235#endif /* IPv6 */
236 }
237
238 ret_val = netlbl_domhsh_add(entry, audit_info);
141 if (ret_val != 0) 239 if (ret_val != 0)
142 goto add_failure; 240 goto add_failure;
143 241
144 return 0; 242 return 0;
145 243
146add_failure: 244add_failure:
245 if (cipsov4)
246 cipso_v4_doi_putdef(cipsov4);
147 if (entry) 247 if (entry)
148 kfree(entry->domain); 248 kfree(entry->domain);
249 kfree(addrmap);
149 kfree(entry); 250 kfree(entry);
150 return ret_val; 251 return ret_val;
151} 252}
152 253
153/** 254/**
255 * netlbl_mgmt_listentry - List a NetLabel/LSM domain map entry
256 * @skb: the NETLINK buffer
257 * @entry: the map entry
258 *
259 * Description:
260 * This function is a helper function used by the LISTALL and LISTDEF command
261 * handlers. The caller is responsibile for ensuring that the RCU read lock
262 * is held. Returns zero on success, negative values on failure.
263 *
264 */
265static int netlbl_mgmt_listentry(struct sk_buff *skb,
266 struct netlbl_dom_map *entry)
267{
268 int ret_val;
269 struct nlattr *nla_a;
270 struct nlattr *nla_b;
271 struct netlbl_af4list *iter4;
272#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
273 struct netlbl_af6list *iter6;
274#endif
275
276 if (entry->domain != NULL) {
277 ret_val = nla_put_string(skb,
278 NLBL_MGMT_A_DOMAIN, entry->domain);
279 if (ret_val != 0)
280 return ret_val;
281 }
282
283 switch (entry->type) {
284 case NETLBL_NLTYPE_ADDRSELECT:
285 nla_a = nla_nest_start(skb, NLBL_MGMT_A_SELECTORLIST);
286 if (nla_a == NULL)
287 return -ENOMEM;
288
289 netlbl_af4list_foreach_rcu(iter4,
290 &entry->type_def.addrsel->list4) {
291 struct netlbl_domaddr4_map *map4;
292 struct in_addr addr_struct;
293
294 nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR);
295 if (nla_b == NULL)
296 return -ENOMEM;
297
298 addr_struct.s_addr = iter4->addr;
299 ret_val = nla_put(skb, NLBL_MGMT_A_IPV4ADDR,
300 sizeof(struct in_addr),
301 &addr_struct);
302 if (ret_val != 0)
303 return ret_val;
304 addr_struct.s_addr = iter4->mask;
305 ret_val = nla_put(skb, NLBL_MGMT_A_IPV4MASK,
306 sizeof(struct in_addr),
307 &addr_struct);
308 if (ret_val != 0)
309 return ret_val;
310 map4 = netlbl_domhsh_addr4_entry(iter4);
311 ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL,
312 map4->type);
313 if (ret_val != 0)
314 return ret_val;
315 switch (map4->type) {
316 case NETLBL_NLTYPE_CIPSOV4:
317 ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI,
318 map4->type_def.cipsov4->doi);
319 if (ret_val != 0)
320 return ret_val;
321 break;
322 }
323
324 nla_nest_end(skb, nla_b);
325 }
326#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
327 netlbl_af6list_foreach_rcu(iter6,
328 &entry->type_def.addrsel->list6) {
329 struct netlbl_domaddr6_map *map6;
330
331 nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR);
332 if (nla_b == NULL)
333 return -ENOMEM;
334
335 ret_val = nla_put(skb, NLBL_MGMT_A_IPV6ADDR,
336 sizeof(struct in6_addr),
337 &iter6->addr);
338 if (ret_val != 0)
339 return ret_val;
340 ret_val = nla_put(skb, NLBL_MGMT_A_IPV6MASK,
341 sizeof(struct in6_addr),
342 &iter6->mask);
343 if (ret_val != 0)
344 return ret_val;
345 map6 = netlbl_domhsh_addr6_entry(iter6);
346 ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL,
347 map6->type);
348 if (ret_val != 0)
349 return ret_val;
350
351 nla_nest_end(skb, nla_b);
352 }
353#endif /* IPv6 */
354
355 nla_nest_end(skb, nla_a);
356 break;
357 case NETLBL_NLTYPE_UNLABELED:
358 ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, entry->type);
359 break;
360 case NETLBL_NLTYPE_CIPSOV4:
361 ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, entry->type);
362 if (ret_val != 0)
363 return ret_val;
364 ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI,
365 entry->type_def.cipsov4->doi);
366 break;
367 }
368
369 return ret_val;
370}
371
372/*
373 * NetLabel Command Handlers
374 */
375
376/**
377 * netlbl_mgmt_add - Handle an ADD message
378 * @skb: the NETLINK buffer
379 * @info: the Generic NETLINK info block
380 *
381 * Description:
382 * Process a user generated ADD message and add the domains from the message
383 * to the hash table. See netlabel.h for a description of the message format.
384 * Returns zero on success, negative values on failure.
385 *
386 */
387static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info)
388{
389 struct netlbl_audit audit_info;
390
391 if ((!info->attrs[NLBL_MGMT_A_DOMAIN]) ||
392 (!info->attrs[NLBL_MGMT_A_PROTOCOL]) ||
393 (info->attrs[NLBL_MGMT_A_IPV4ADDR] &&
394 info->attrs[NLBL_MGMT_A_IPV6ADDR]) ||
395 (info->attrs[NLBL_MGMT_A_IPV4MASK] &&
396 info->attrs[NLBL_MGMT_A_IPV6MASK]) ||
397 ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^
398 (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) ||
399 ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^
400 (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL)))
401 return -EINVAL;
402
403 netlbl_netlink_auditinfo(skb, &audit_info);
404
405 return netlbl_mgmt_add_common(info, &audit_info);
406}
407
408/**
154 * netlbl_mgmt_remove - Handle a REMOVE message 409 * netlbl_mgmt_remove - Handle a REMOVE message
155 * @skb: the NETLINK buffer 410 * @skb: the NETLINK buffer
156 * @info: the Generic NETLINK info block 411 * @info: the Generic NETLINK info block
@@ -198,23 +453,9 @@ static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg)
198 if (data == NULL) 453 if (data == NULL)
199 goto listall_cb_failure; 454 goto listall_cb_failure;
200 455
201 ret_val = nla_put_string(cb_arg->skb, 456 ret_val = netlbl_mgmt_listentry(cb_arg->skb, entry);
202 NLBL_MGMT_A_DOMAIN,
203 entry->domain);
204 if (ret_val != 0) 457 if (ret_val != 0)
205 goto listall_cb_failure; 458 goto listall_cb_failure;
206 ret_val = nla_put_u32(cb_arg->skb, NLBL_MGMT_A_PROTOCOL, entry->type);
207 if (ret_val != 0)
208 goto listall_cb_failure;
209 switch (entry->type) {
210 case NETLBL_NLTYPE_CIPSOV4:
211 ret_val = nla_put_u32(cb_arg->skb,
212 NLBL_MGMT_A_CV4DOI,
213 entry->type_def.cipsov4->doi);
214 if (ret_val != 0)
215 goto listall_cb_failure;
216 break;
217 }
218 459
219 cb_arg->seq++; 460 cb_arg->seq++;
220 return genlmsg_end(cb_arg->skb, data); 461 return genlmsg_end(cb_arg->skb, data);
@@ -268,56 +509,22 @@ static int netlbl_mgmt_listall(struct sk_buff *skb,
268 */ 509 */
269static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info) 510static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info)
270{ 511{
271 int ret_val = -EINVAL;
272 struct netlbl_dom_map *entry = NULL;
273 u32 tmp_val;
274 struct netlbl_audit audit_info; 512 struct netlbl_audit audit_info;
275 513
276 if (!info->attrs[NLBL_MGMT_A_PROTOCOL]) 514 if ((!info->attrs[NLBL_MGMT_A_PROTOCOL]) ||
277 goto adddef_failure; 515 (info->attrs[NLBL_MGMT_A_IPV4ADDR] &&
516 info->attrs[NLBL_MGMT_A_IPV6ADDR]) ||
517 (info->attrs[NLBL_MGMT_A_IPV4MASK] &&
518 info->attrs[NLBL_MGMT_A_IPV6MASK]) ||
519 ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^
520 (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) ||
521 ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^
522 (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL)))
523 return -EINVAL;
278 524
279 netlbl_netlink_auditinfo(skb, &audit_info); 525 netlbl_netlink_auditinfo(skb, &audit_info);
280 526
281 entry = kzalloc(sizeof(*entry), GFP_KERNEL); 527 return netlbl_mgmt_add_common(info, &audit_info);
282 if (entry == NULL) {
283 ret_val = -ENOMEM;
284 goto adddef_failure;
285 }
286 entry->type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]);
287
288 switch (entry->type) {
289 case NETLBL_NLTYPE_UNLABELED:
290 ret_val = netlbl_domhsh_add_default(entry, &audit_info);
291 break;
292 case NETLBL_NLTYPE_CIPSOV4:
293 if (!info->attrs[NLBL_MGMT_A_CV4DOI])
294 goto adddef_failure;
295
296 tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]);
297 /* We should be holding a rcu_read_lock() here while we hold
298 * the result but since the entry will always be deleted when
299 * the CIPSO DOI is deleted we aren't going to keep the
300 * lock. */
301 rcu_read_lock();
302 entry->type_def.cipsov4 = cipso_v4_doi_getdef(tmp_val);
303 if (entry->type_def.cipsov4 == NULL) {
304 rcu_read_unlock();
305 goto adddef_failure;
306 }
307 ret_val = netlbl_domhsh_add_default(entry, &audit_info);
308 rcu_read_unlock();
309 break;
310 default:
311 goto adddef_failure;
312 }
313 if (ret_val != 0)
314 goto adddef_failure;
315
316 return 0;
317
318adddef_failure:
319 kfree(entry);
320 return ret_val;
321} 528}
322 529
323/** 530/**
@@ -371,19 +578,10 @@ static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info)
371 ret_val = -ENOENT; 578 ret_val = -ENOENT;
372 goto listdef_failure_lock; 579 goto listdef_failure_lock;
373 } 580 }
374 ret_val = nla_put_u32(ans_skb, NLBL_MGMT_A_PROTOCOL, entry->type); 581 ret_val = netlbl_mgmt_listentry(ans_skb, entry);
375 if (ret_val != 0)
376 goto listdef_failure_lock;
377 switch (entry->type) {
378 case NETLBL_NLTYPE_CIPSOV4:
379 ret_val = nla_put_u32(ans_skb,
380 NLBL_MGMT_A_CV4DOI,
381 entry->type_def.cipsov4->doi);
382 if (ret_val != 0)
383 goto listdef_failure_lock;
384 break;
385 }
386 rcu_read_unlock(); 582 rcu_read_unlock();
583 if (ret_val != 0)
584 goto listdef_failure;
387 585
388 genlmsg_end(ans_skb, data); 586 genlmsg_end(ans_skb, data);
389 return genlmsg_reply(ans_skb, info); 587 return genlmsg_reply(ans_skb, info);
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-01 08:39:01 -0500