1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31#include <linux/types.h>
32#include <linux/rcupdate.h>
33#include <linux/list.h>
34#include <linux/spinlock.h>
35#include <linux/socket.h>
36#include <linux/string.h>
37#include <linux/skbuff.h>
38#include <linux/audit.h>
39#include <linux/in.h>
40#include <linux/in6.h>
41#include <linux/ip.h>
42#include <linux/ipv6.h>
43#include <linux/notifier.h>
44#include <linux/netdevice.h>
45#include <linux/security.h>
46#include <linux/slab.h>
47#include <net/sock.h>
48#include <net/netlink.h>
49#include <net/genetlink.h>
50#include <net/ip.h>
51#include <net/ipv6.h>
52#include <net/net_namespace.h>
53#include <net/netlabel.h>
54#include <asm/bug.h>
55#include <linux/atomic.h>
56
57#include "netlabel_user.h"
58#include "netlabel_addrlist.h"
59#include "netlabel_domainhash.h"
60#include "netlabel_unlabeled.h"
61#include "netlabel_mgmt.h"
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77struct netlbl_unlhsh_tbl {
78 struct list_head *tbl;
79 u32 size;
80};
81#define netlbl_unlhsh_addr4_entry(iter) \
82 container_of(iter, struct netlbl_unlhsh_addr4, list)
83struct netlbl_unlhsh_addr4 {
84 u32 secid;
85
86 struct netlbl_af4list list;
87 struct rcu_head rcu;
88};
89#define netlbl_unlhsh_addr6_entry(iter) \
90 container_of(iter, struct netlbl_unlhsh_addr6, list)
91struct netlbl_unlhsh_addr6 {
92 u32 secid;
93
94 struct netlbl_af6list list;
95 struct rcu_head rcu;
96};
97struct netlbl_unlhsh_iface {
98 int ifindex;
99 struct list_head addr4_list;
100 struct list_head addr6_list;
101
102 u32 valid;
103 struct list_head list;
104 struct rcu_head rcu;
105};
106
107
108struct netlbl_unlhsh_walk_arg {
109 struct netlink_callback *nl_cb;
110 struct sk_buff *skb;
111 u32 seq;
112};
113
114
115
116
117static DEFINE_SPINLOCK(netlbl_unlhsh_lock);
118#define netlbl_unlhsh_rcu_deref(p) \
119 rcu_dereference_check(p, lockdep_is_held(&netlbl_unlhsh_lock))
120static struct netlbl_unlhsh_tbl *netlbl_unlhsh = NULL;
121static struct netlbl_unlhsh_iface *netlbl_unlhsh_def = NULL;
122
123
124static u8 netlabel_unlabel_acceptflg = 0;
125
126
127static struct genl_family netlbl_unlabel_gnl_family = {
128 .id = GENL_ID_GENERATE,
129 .hdrsize = 0,
130 .name = NETLBL_NLTYPE_UNLABELED_NAME,
131 .version = NETLBL_PROTO_VERSION,
132 .maxattr = NLBL_UNLABEL_A_MAX,
133};
134
135
136static const struct nla_policy netlbl_unlabel_genl_policy[NLBL_UNLABEL_A_MAX + 1] = {
137 [NLBL_UNLABEL_A_ACPTFLG] = { .type = NLA_U8 },
138 [NLBL_UNLABEL_A_IPV6ADDR] = { .type = NLA_BINARY,
139 .len = sizeof(struct in6_addr) },
140 [NLBL_UNLABEL_A_IPV6MASK] = { .type = NLA_BINARY,
141 .len = sizeof(struct in6_addr) },
142 [NLBL_UNLABEL_A_IPV4ADDR] = { .type = NLA_BINARY,
143 .len = sizeof(struct in_addr) },
144 [NLBL_UNLABEL_A_IPV4MASK] = { .type = NLA_BINARY,
145 .len = sizeof(struct in_addr) },
146 [NLBL_UNLABEL_A_IFACE] = { .type = NLA_NUL_STRING,
147 .len = IFNAMSIZ - 1 },
148 [NLBL_UNLABEL_A_SECCTX] = { .type = NLA_BINARY }
149};
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168static void netlbl_unlhsh_free_iface(struct rcu_head *entry)
169{
170 struct netlbl_unlhsh_iface *iface;
171 struct netlbl_af4list *iter4;
172 struct netlbl_af4list *tmp4;
173#if IS_ENABLED(CONFIG_IPV6)
174 struct netlbl_af6list *iter6;
175 struct netlbl_af6list *tmp6;
176#endif
177
178 iface = container_of(entry, struct netlbl_unlhsh_iface, rcu);
179
180
181
182
183 netlbl_af4list_foreach_safe(iter4, tmp4, &iface->addr4_list) {
184 netlbl_af4list_remove_entry(iter4);
185 kfree(netlbl_unlhsh_addr4_entry(iter4));
186 }
187#if IS_ENABLED(CONFIG_IPV6)
188 netlbl_af6list_foreach_safe(iter6, tmp6, &iface->addr6_list) {
189 netlbl_af6list_remove_entry(iter6);
190 kfree(netlbl_unlhsh_addr6_entry(iter6));
191 }
192#endif
193 kfree(iface);
194}
195
196
197
198
199
200
201
202
203
204
205
206
207static u32 netlbl_unlhsh_hash(int ifindex)
208{
209 return ifindex & (netlbl_unlhsh_rcu_deref(netlbl_unlhsh)->size - 1);
210}
211
212
213
214
215
216
217
218
219
220
221
222
223static struct netlbl_unlhsh_iface *netlbl_unlhsh_search_iface(int ifindex)
224{
225 u32 bkt;
226 struct list_head *bkt_list;
227 struct netlbl_unlhsh_iface *iter;
228
229 bkt = netlbl_unlhsh_hash(ifindex);
230 bkt_list = &netlbl_unlhsh_rcu_deref(netlbl_unlhsh)->tbl[bkt];
231 list_for_each_entry_rcu(iter, bkt_list, list)
232 if (iter->valid && iter->ifindex == ifindex)
233 return iter;
234
235 return NULL;
236}
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251static int netlbl_unlhsh_add_addr4(struct netlbl_unlhsh_iface *iface,
252 const struct in_addr *addr,
253 const struct in_addr *mask,
254 u32 secid)
255{
256 int ret_val;
257 struct netlbl_unlhsh_addr4 *entry;
258
259 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
260 if (entry == NULL)
261 return -ENOMEM;
262
263 entry->list.addr = addr->s_addr & mask->s_addr;
264 entry->list.mask = mask->s_addr;
265 entry->list.valid = 1;
266 entry->secid = secid;
267
268 spin_lock(&netlbl_unlhsh_lock);
269 ret_val = netlbl_af4list_add(&entry->list, &iface->addr4_list);
270 spin_unlock(&netlbl_unlhsh_lock);
271
272 if (ret_val != 0)
273 kfree(entry);
274 return ret_val;
275}
276
277#if IS_ENABLED(CONFIG_IPV6)
278
279
280
281
282
283
284
285
286
287
288
289
290
291static int netlbl_unlhsh_add_addr6(struct netlbl_unlhsh_iface *iface,
292 const struct in6_addr *addr,
293 const struct in6_addr *mask,
294 u32 secid)
295{
296 int ret_val;
297 struct netlbl_unlhsh_addr6 *entry;
298
299 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
300 if (entry == NULL)
301 return -ENOMEM;
302
303 entry->list.addr = *addr;
304 entry->list.addr.s6_addr32[0] &= mask->s6_addr32[0];
305 entry->list.addr.s6_addr32[1] &= mask->s6_addr32[1];
306 entry->list.addr.s6_addr32[2] &= mask->s6_addr32[2];
307 entry->list.addr.s6_addr32[3] &= mask->s6_addr32[3];
308 entry->list.mask = *mask;
309 entry->list.valid = 1;
310 entry->secid = secid;
311
312 spin_lock(&netlbl_unlhsh_lock);
313 ret_val = netlbl_af6list_add(&entry->list, &iface->addr6_list);
314 spin_unlock(&netlbl_unlhsh_lock);
315
316 if (ret_val != 0)
317 kfree(entry);
318 return 0;
319}
320#endif
321
322
323
324
325
326
327
328
329
330
331
332static struct netlbl_unlhsh_iface *netlbl_unlhsh_add_iface(int ifindex)
333{
334 u32 bkt;
335 struct netlbl_unlhsh_iface *iface;
336
337 iface = kzalloc(sizeof(*iface), GFP_ATOMIC);
338 if (iface == NULL)
339 return NULL;
340
341 iface->ifindex = ifindex;
342 INIT_LIST_HEAD(&iface->addr4_list);
343 INIT_LIST_HEAD(&iface->addr6_list);
344 iface->valid = 1;
345
346 spin_lock(&netlbl_unlhsh_lock);
347 if (ifindex > 0) {
348 bkt = netlbl_unlhsh_hash(ifindex);
349 if (netlbl_unlhsh_search_iface(ifindex) != NULL)
350 goto add_iface_failure;
351 list_add_tail_rcu(&iface->list,
352 &netlbl_unlhsh_rcu_deref(netlbl_unlhsh)->tbl[bkt]);
353 } else {
354 INIT_LIST_HEAD(&iface->list);
355 if (netlbl_unlhsh_rcu_deref(netlbl_unlhsh_def) != NULL)
356 goto add_iface_failure;
357 rcu_assign_pointer(netlbl_unlhsh_def, iface);
358 }
359 spin_unlock(&netlbl_unlhsh_lock);
360
361 return iface;
362
363add_iface_failure:
364 spin_unlock(&netlbl_unlhsh_lock);
365 kfree(iface);
366 return NULL;
367}
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384int netlbl_unlhsh_add(struct net *net,
385 const char *dev_name,
386 const void *addr,
387 const void *mask,
388 u32 addr_len,
389 u32 secid,
390 struct netlbl_audit *audit_info)
391{
392 int ret_val;
393 int ifindex;
394 struct net_device *dev;
395 struct netlbl_unlhsh_iface *iface;
396 struct audit_buffer *audit_buf = NULL;
397 char *secctx = NULL;
398 u32 secctx_len;
399
400 if (addr_len != sizeof(struct in_addr) &&
401 addr_len != sizeof(struct in6_addr))
402 return -EINVAL;
403
404 rcu_read_lock();
405 if (dev_name != NULL) {
406 dev = dev_get_by_name_rcu(net, dev_name);
407 if (dev == NULL) {
408 ret_val = -ENODEV;
409 goto unlhsh_add_return;
410 }
411 ifindex = dev->ifindex;
412 iface = netlbl_unlhsh_search_iface(ifindex);
413 } else {
414 ifindex = 0;
415 iface = rcu_dereference(netlbl_unlhsh_def);
416 }
417 if (iface == NULL) {
418 iface = netlbl_unlhsh_add_iface(ifindex);
419 if (iface == NULL) {
420 ret_val = -ENOMEM;
421 goto unlhsh_add_return;
422 }
423 }
424 audit_buf = netlbl_audit_start_common(AUDIT_MAC_UNLBL_STCADD,
425 audit_info);
426 switch (addr_len) {
427 case sizeof(struct in_addr): {
428 const struct in_addr *addr4 = addr;
429 const struct in_addr *mask4 = mask;
430
431 ret_val = netlbl_unlhsh_add_addr4(iface, addr4, mask4, secid);
432 if (audit_buf != NULL)
433 netlbl_af4list_audit_addr(audit_buf, 1,
434 dev_name,
435 addr4->s_addr,
436 mask4->s_addr);
437 break;
438 }
439#if IS_ENABLED(CONFIG_IPV6)
440 case sizeof(struct in6_addr): {
441 const struct in6_addr *addr6 = addr;
442 const struct in6_addr *mask6 = mask;
443
444 ret_val = netlbl_unlhsh_add_addr6(iface, addr6, mask6, secid);
445 if (audit_buf != NULL)
446 netlbl_af6list_audit_addr(audit_buf, 1,
447 dev_name,
448 addr6, mask6);
449 break;
450 }
451#endif
452 default:
453 ret_val = -EINVAL;
454 }
455 if (ret_val == 0)
456 atomic_inc(&netlabel_mgmt_protocount);
457
458unlhsh_add_return:
459 rcu_read_unlock();
460 if (audit_buf != NULL) {
461 if (security_secid_to_secctx(secid,
462 &secctx,
463 &secctx_len) == 0) {
464 audit_log_format(audit_buf, " sec_obj=%s", secctx);
465 security_release_secctx(secctx, secctx_len);
466 }
467 audit_log_format(audit_buf, " res=%u", ret_val == 0 ? 1 : 0);
468 audit_log_end(audit_buf);
469 }
470 return ret_val;
471}
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486static int netlbl_unlhsh_remove_addr4(struct net *net,
487 struct netlbl_unlhsh_iface *iface,
488 const struct in_addr *addr,
489 const struct in_addr *mask,
490 struct netlbl_audit *audit_info)
491{
492 struct netlbl_af4list *list_entry;
493 struct netlbl_unlhsh_addr4 *entry;
494 struct audit_buffer *audit_buf;
495 struct net_device *dev;
496 char *secctx;
497 u32 secctx_len;
498
499 spin_lock(&netlbl_unlhsh_lock);
500 list_entry = netlbl_af4list_remove(addr->s_addr, mask->s_addr,
501 &iface->addr4_list);
502 spin_unlock(&netlbl_unlhsh_lock);
503 if (list_entry != NULL)
504 entry = netlbl_unlhsh_addr4_entry(list_entry);
505 else
506 entry = NULL;
507
508 audit_buf = netlbl_audit_start_common(AUDIT_MAC_UNLBL_STCDEL,
509 audit_info);
510 if (audit_buf != NULL) {
511 dev = dev_get_by_index(net, iface->ifindex);
512 netlbl_af4list_audit_addr(audit_buf, 1,
513 (dev != NULL ? dev->name : NULL),
514 addr->s_addr, mask->s_addr);
515 if (dev != NULL)
516 dev_put(dev);
517 if (entry != NULL &&
518 security_secid_to_secctx(entry->secid,
519 &secctx, &secctx_len) == 0) {
520 audit_log_format(audit_buf, " sec_obj=%s", secctx);
521 security_release_secctx(secctx, secctx_len);
522 }
523 audit_log_format(audit_buf, " res=%u", entry != NULL ? 1 : 0);
524 audit_log_end(audit_buf);
525 }
526
527 if (entry == NULL)
528 return -ENOENT;
529
530 kfree_rcu(entry, rcu);
531 return 0;
532}
533
534#if IS_ENABLED(CONFIG_IPV6)
535
536
537
538
539
540
541
542
543
544
545
546
547
548static int netlbl_unlhsh_remove_addr6(struct net *net,
549 struct netlbl_unlhsh_iface *iface,
550 const struct in6_addr *addr,
551 const struct in6_addr *mask,
552 struct netlbl_audit *audit_info)
553{
554 struct netlbl_af6list *list_entry;
555 struct netlbl_unlhsh_addr6 *entry;
556 struct audit_buffer *audit_buf;
557 struct net_device *dev;
558 char *secctx;
559 u32 secctx_len;
560
561 spin_lock(&netlbl_unlhsh_lock);
562 list_entry = netlbl_af6list_remove(addr, mask, &iface->addr6_list);
563 spin_unlock(&netlbl_unlhsh_lock);
564 if (list_entry != NULL)
565 entry = netlbl_unlhsh_addr6_entry(list_entry);
566 else
567 entry = NULL;
568
569 audit_buf = netlbl_audit_start_common(AUDIT_MAC_UNLBL_STCDEL,
570 audit_info);
571 if (audit_buf != NULL) {
572 dev = dev_get_by_index(net, iface->ifindex);
573 netlbl_af6list_audit_addr(audit_buf, 1,
574 (dev != NULL ? dev->name : NULL),
575 addr, mask);
576 if (dev != NULL)
577 dev_put(dev);
578 if (entry != NULL &&
579 security_secid_to_secctx(entry->secid,
580 &secctx, &secctx_len) == 0) {
581 audit_log_format(audit_buf, " sec_obj=%s", secctx);
582 security_release_secctx(secctx, secctx_len);
583 }
584 audit_log_format(audit_buf, " res=%u", entry != NULL ? 1 : 0);
585 audit_log_end(audit_buf);
586 }
587
588 if (entry == NULL)
589 return -ENOENT;
590
591 kfree_rcu(entry, rcu);
592 return 0;
593}
594#endif
595
596
597
598
599
600
601
602
603
604
605
606static void netlbl_unlhsh_condremove_iface(struct netlbl_unlhsh_iface *iface)
607{
608 struct netlbl_af4list *iter4;
609#if IS_ENABLED(CONFIG_IPV6)
610 struct netlbl_af6list *iter6;
611#endif
612
613 spin_lock(&netlbl_unlhsh_lock);
614 netlbl_af4list_foreach_rcu(iter4, &iface->addr4_list)
615 goto unlhsh_condremove_failure;
616#if IS_ENABLED(CONFIG_IPV6)
617 netlbl_af6list_foreach_rcu(iter6, &iface->addr6_list)
618 goto unlhsh_condremove_failure;
619#endif
620 iface->valid = 0;
621 if (iface->ifindex > 0)
622 list_del_rcu(&iface->list);
623 else
624 RCU_INIT_POINTER(netlbl_unlhsh_def, NULL);
625 spin_unlock(&netlbl_unlhsh_lock);
626
627 call_rcu(&iface->rcu, netlbl_unlhsh_free_iface);
628 return;
629
630unlhsh_condremove_failure:
631 spin_unlock(&netlbl_unlhsh_lock);
632}
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648int netlbl_unlhsh_remove(struct net *net,
649 const char *dev_name,
650 const void *addr,
651 const void *mask,
652 u32 addr_len,
653 struct netlbl_audit *audit_info)
654{
655 int ret_val;
656 struct net_device *dev;
657 struct netlbl_unlhsh_iface *iface;
658
659 if (addr_len != sizeof(struct in_addr) &&
660 addr_len != sizeof(struct in6_addr))
661 return -EINVAL;
662
663 rcu_read_lock();
664 if (dev_name != NULL) {
665 dev = dev_get_by_name_rcu(net, dev_name);
666 if (dev == NULL) {
667 ret_val = -ENODEV;
668 goto unlhsh_remove_return;
669 }
670 iface = netlbl_unlhsh_search_iface(dev->ifindex);
671 } else
672 iface = rcu_dereference(netlbl_unlhsh_def);
673 if (iface == NULL) {
674 ret_val = -ENOENT;
675 goto unlhsh_remove_return;
676 }
677 switch (addr_len) {
678 case sizeof(struct in_addr):
679 ret_val = netlbl_unlhsh_remove_addr4(net,
680 iface, addr, mask,
681 audit_info);
682 break;
683#if IS_ENABLED(CONFIG_IPV6)
684 case sizeof(struct in6_addr):
685 ret_val = netlbl_unlhsh_remove_addr6(net,
686 iface, addr, mask,
687 audit_info);
688 break;
689#endif
690 default:
691 ret_val = -EINVAL;
692 }
693 if (ret_val == 0) {
694 netlbl_unlhsh_condremove_iface(iface);
695 atomic_dec(&netlabel_mgmt_protocount);
696 }
697
698unlhsh_remove_return:
699 rcu_read_unlock();
700 return ret_val;
701}
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719static int netlbl_unlhsh_netdev_handler(struct notifier_block *this,
720 unsigned long event, void *ptr)
721{
722 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
723 struct netlbl_unlhsh_iface *iface = NULL;
724
725 if (!net_eq(dev_net(dev), &init_net))
726 return NOTIFY_DONE;
727
728
729 if (event == NETDEV_DOWN) {
730 spin_lock(&netlbl_unlhsh_lock);
731 iface = netlbl_unlhsh_search_iface(dev->ifindex);
732 if (iface != NULL && iface->valid) {
733 iface->valid = 0;
734 list_del_rcu(&iface->list);
735 } else
736 iface = NULL;
737 spin_unlock(&netlbl_unlhsh_lock);
738 }
739
740 if (iface != NULL)
741 call_rcu(&iface->rcu, netlbl_unlhsh_free_iface);
742
743 return NOTIFY_DONE;
744}
745
746
747
748
749
750
751
752
753
754
755static void netlbl_unlabel_acceptflg_set(u8 value,
756 struct netlbl_audit *audit_info)
757{
758 struct audit_buffer *audit_buf;
759 u8 old_val;
760
761 old_val = netlabel_unlabel_acceptflg;
762 netlabel_unlabel_acceptflg = value;
763 audit_buf = netlbl_audit_start_common(AUDIT_MAC_UNLBL_ALLOW,
764 audit_info);
765 if (audit_buf != NULL) {
766 audit_log_format(audit_buf,
767 " unlbl_accept=%u old=%u", value, old_val);
768 audit_log_end(audit_buf);
769 }
770}
771
772
773
774
775
776
777
778
779
780
781
782
783
784static int netlbl_unlabel_addrinfo_get(struct genl_info *info,
785 void **addr,
786 void **mask,
787 u32 *len)
788{
789 u32 addr_len;
790
791 if (info->attrs[NLBL_UNLABEL_A_IPV4ADDR]) {
792 addr_len = nla_len(info->attrs[NLBL_UNLABEL_A_IPV4ADDR]);
793 if (addr_len != sizeof(struct in_addr) &&
794 addr_len != nla_len(info->attrs[NLBL_UNLABEL_A_IPV4MASK]))
795 return -EINVAL;
796 *len = addr_len;
797 *addr = nla_data(info->attrs[NLBL_UNLABEL_A_IPV4ADDR]);
798 *mask = nla_data(info->attrs[NLBL_UNLABEL_A_IPV4MASK]);
799 return 0;
800 } else if (info->attrs[NLBL_UNLABEL_A_IPV6ADDR]) {
801 addr_len = nla_len(info->attrs[NLBL_UNLABEL_A_IPV6ADDR]);
802 if (addr_len != sizeof(struct in6_addr) &&
803 addr_len != nla_len(info->attrs[NLBL_UNLABEL_A_IPV6MASK]))
804 return -EINVAL;
805 *len = addr_len;
806 *addr = nla_data(info->attrs[NLBL_UNLABEL_A_IPV6ADDR]);
807 *mask = nla_data(info->attrs[NLBL_UNLABEL_A_IPV6MASK]);
808 return 0;
809 }
810
811 return -EINVAL;
812}
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828static int netlbl_unlabel_accept(struct sk_buff *skb, struct genl_info *info)
829{
830 u8 value;
831 struct netlbl_audit audit_info;
832
833 if (info->attrs[NLBL_UNLABEL_A_ACPTFLG]) {
834 value = nla_get_u8(info->attrs[NLBL_UNLABEL_A_ACPTFLG]);
835 if (value == 1 || value == 0) {
836 netlbl_netlink_auditinfo(skb, &audit_info);
837 netlbl_unlabel_acceptflg_set(value, &audit_info);
838 return 0;
839 }
840 }
841
842 return -EINVAL;
843}
844
845
846
847
848
849
850
851
852
853
854
855static int netlbl_unlabel_list(struct sk_buff *skb, struct genl_info *info)
856{
857 int ret_val = -EINVAL;
858 struct sk_buff *ans_skb;
859 void *data;
860
861 ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
862 if (ans_skb == NULL)
863 goto list_failure;
864 data = genlmsg_put_reply(ans_skb, info, &netlbl_unlabel_gnl_family,
865 0, NLBL_UNLABEL_C_LIST);
866 if (data == NULL) {
867 ret_val = -ENOMEM;
868 goto list_failure;
869 }
870
871 ret_val = nla_put_u8(ans_skb,
872 NLBL_UNLABEL_A_ACPTFLG,
873 netlabel_unlabel_acceptflg);
874 if (ret_val != 0)
875 goto list_failure;
876
877 genlmsg_end(ans_skb, data);
878 return genlmsg_reply(ans_skb, info);
879
880list_failure:
881 kfree_skb(ans_skb);
882 return ret_val;
883}
884
885
886
887
888
889
890
891
892
893
894
895
896static int netlbl_unlabel_staticadd(struct sk_buff *skb,
897 struct genl_info *info)
898{
899 int ret_val;
900 char *dev_name;
901 void *addr;
902 void *mask;
903 u32 addr_len;
904 u32 secid;
905 struct netlbl_audit audit_info;
906
907
908
909
910
911 if (!info->attrs[NLBL_UNLABEL_A_SECCTX] ||
912 !info->attrs[NLBL_UNLABEL_A_IFACE] ||
913 !((!info->attrs[NLBL_UNLABEL_A_IPV4ADDR] ||
914 !info->attrs[NLBL_UNLABEL_A_IPV4MASK]) ^
915 (!info->attrs[NLBL_UNLABEL_A_IPV6ADDR] ||
916 !info->attrs[NLBL_UNLABEL_A_IPV6MASK])))
917 return -EINVAL;
918
919 netlbl_netlink_auditinfo(skb, &audit_info);
920
921 ret_val = netlbl_unlabel_addrinfo_get(info, &addr, &mask, &addr_len);
922 if (ret_val != 0)
923 return ret_val;
924 dev_name = nla_data(info->attrs[NLBL_UNLABEL_A_IFACE]);
925 ret_val = security_secctx_to_secid(
926 nla_data(info->attrs[NLBL_UNLABEL_A_SECCTX]),
927 nla_len(info->attrs[NLBL_UNLABEL_A_SECCTX]),
928 &secid);
929 if (ret_val != 0)
930 return ret_val;
931
932 return netlbl_unlhsh_add(&init_net,
933 dev_name, addr, mask, addr_len, secid,
934 &audit_info);
935}
936
937
938
939
940
941
942
943
944
945
946
947
948static int netlbl_unlabel_staticadddef(struct sk_buff *skb,
949 struct genl_info *info)
950{
951 int ret_val;
952 void *addr;
953 void *mask;
954 u32 addr_len;
955 u32 secid;
956 struct netlbl_audit audit_info;
957
958
959
960
961
962 if (!info->attrs[NLBL_UNLABEL_A_SECCTX] ||
963 !((!info->attrs[NLBL_UNLABEL_A_IPV4ADDR] ||
964 !info->attrs[NLBL_UNLABEL_A_IPV4MASK]) ^
965 (!info->attrs[NLBL_UNLABEL_A_IPV6ADDR] ||
966 !info->attrs[NLBL_UNLABEL_A_IPV6MASK])))
967 return -EINVAL;
968
969 netlbl_netlink_auditinfo(skb, &audit_info);
970
971 ret_val = netlbl_unlabel_addrinfo_get(info, &addr, &mask, &addr_len);
972 if (ret_val != 0)
973 return ret_val;
974 ret_val = security_secctx_to_secid(
975 nla_data(info->attrs[NLBL_UNLABEL_A_SECCTX]),
976 nla_len(info->attrs[NLBL_UNLABEL_A_SECCTX]),
977 &secid);
978 if (ret_val != 0)
979 return ret_val;
980
981 return netlbl_unlhsh_add(&init_net,
982 NULL, addr, mask, addr_len, secid,
983 &audit_info);
984}
985
986
987
988
989
990
991
992
993
994
995
996
997static int netlbl_unlabel_staticremove(struct sk_buff *skb,
998 struct genl_info *info)
999{
1000 int ret_val;
1001 char *dev_name;
1002 void *addr;
1003 void *mask;
1004 u32 addr_len;
1005 struct netlbl_audit audit_info;
1006
1007
1008
1009 if (!info->attrs[NLBL_UNLABEL_A_IFACE] ||
1010 !((!info->attrs[NLBL_UNLABEL_A_IPV4ADDR] ||
1011 !info->attrs[NLBL_UNLABEL_A_IPV4MASK]) ^
1012 (!info->attrs[NLBL_UNLABEL_A_IPV6ADDR] ||
1013 !info->attrs[NLBL_UNLABEL_A_IPV6MASK])))
1014 return -EINVAL;
1015
1016 netlbl_netlink_auditinfo(skb, &audit_info);
1017
1018 ret_val = netlbl_unlabel_addrinfo_get(info, &addr, &mask, &addr_len);
1019 if (ret_val != 0)
1020 return ret_val;
1021 dev_name = nla_data(info->attrs[NLBL_UNLABEL_A_IFACE]);
1022
1023 return netlbl_unlhsh_remove(&init_net,
1024 dev_name, addr, mask, addr_len,
1025 &audit_info);
1026}
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039static int netlbl_unlabel_staticremovedef(struct sk_buff *skb,
1040 struct genl_info *info)
1041{
1042 int ret_val;
1043 void *addr;
1044 void *mask;
1045 u32 addr_len;
1046 struct netlbl_audit audit_info;
1047
1048
1049
1050 if (!((!info->attrs[NLBL_UNLABEL_A_IPV4ADDR] ||
1051 !info->attrs[NLBL_UNLABEL_A_IPV4MASK]) ^
1052 (!info->attrs[NLBL_UNLABEL_A_IPV6ADDR] ||
1053 !info->attrs[NLBL_UNLABEL_A_IPV6MASK])))
1054 return -EINVAL;
1055
1056 netlbl_netlink_auditinfo(skb, &audit_info);
1057
1058 ret_val = netlbl_unlabel_addrinfo_get(info, &addr, &mask, &addr_len);
1059 if (ret_val != 0)
1060 return ret_val;
1061
1062 return netlbl_unlhsh_remove(&init_net,
1063 NULL, addr, mask, addr_len,
1064 &audit_info);
1065}
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084static int netlbl_unlabel_staticlist_gen(u32 cmd,
1085 const struct netlbl_unlhsh_iface *iface,
1086 const struct netlbl_unlhsh_addr4 *addr4,
1087 const struct netlbl_unlhsh_addr6 *addr6,
1088 void *arg)
1089{
1090 int ret_val = -ENOMEM;
1091 struct netlbl_unlhsh_walk_arg *cb_arg = arg;
1092 struct net_device *dev;
1093 void *data;
1094 u32 secid;
1095 char *secctx;
1096 u32 secctx_len;
1097
1098 data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid,
1099 cb_arg->seq, &netlbl_unlabel_gnl_family,
1100 NLM_F_MULTI, cmd);
1101 if (data == NULL)
1102 goto list_cb_failure;
1103
1104 if (iface->ifindex > 0) {
1105 dev = dev_get_by_index(&init_net, iface->ifindex);
1106 if (!dev) {
1107 ret_val = -ENODEV;
1108 goto list_cb_failure;
1109 }
1110 ret_val = nla_put_string(cb_arg->skb,
1111 NLBL_UNLABEL_A_IFACE, dev->name);
1112 dev_put(dev);
1113 if (ret_val != 0)
1114 goto list_cb_failure;
1115 }
1116
1117 if (addr4) {
1118 struct in_addr addr_struct;
1119
1120 addr_struct.s_addr = addr4->list.addr;
1121 ret_val = nla_put(cb_arg->skb,
1122 NLBL_UNLABEL_A_IPV4ADDR,
1123 sizeof(struct in_addr),
1124 &addr_struct);
1125 if (ret_val != 0)
1126 goto list_cb_failure;
1127
1128 addr_struct.s_addr = addr4->list.mask;
1129 ret_val = nla_put(cb_arg->skb,
1130 NLBL_UNLABEL_A_IPV4MASK,
1131 sizeof(struct in_addr),
1132 &addr_struct);
1133 if (ret_val != 0)
1134 goto list_cb_failure;
1135
1136 secid = addr4->secid;
1137 } else {
1138 ret_val = nla_put(cb_arg->skb,
1139 NLBL_UNLABEL_A_IPV6ADDR,
1140 sizeof(struct in6_addr),
1141 &addr6->list.addr);
1142 if (ret_val != 0)
1143 goto list_cb_failure;
1144
1145 ret_val = nla_put(cb_arg->skb,
1146 NLBL_UNLABEL_A_IPV6MASK,
1147 sizeof(struct in6_addr),
1148 &addr6->list.mask);
1149 if (ret_val != 0)
1150 goto list_cb_failure;
1151
1152 secid = addr6->secid;
1153 }
1154
1155 ret_val = security_secid_to_secctx(secid, &secctx, &secctx_len);
1156 if (ret_val != 0)
1157 goto list_cb_failure;
1158 ret_val = nla_put(cb_arg->skb,
1159 NLBL_UNLABEL_A_SECCTX,
1160 secctx_len,
1161 secctx);
1162 security_release_secctx(secctx, secctx_len);
1163 if (ret_val != 0)
1164 goto list_cb_failure;
1165
1166 cb_arg->seq++;
1167 return genlmsg_end(cb_arg->skb, data);
1168
1169list_cb_failure:
1170 genlmsg_cancel(cb_arg->skb, data);
1171 return ret_val;
1172}
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185static int netlbl_unlabel_staticlist(struct sk_buff *skb,
1186 struct netlink_callback *cb)
1187{
1188 struct netlbl_unlhsh_walk_arg cb_arg;
1189 u32 skip_bkt = cb->args[0];
1190 u32 skip_chain = cb->args[1];
1191 u32 iter_bkt;
1192 u32 iter_chain = 0, iter_addr4 = 0, iter_addr6 = 0;
1193 struct netlbl_unlhsh_iface *iface;
1194 struct list_head *iter_list;
1195 struct netlbl_af4list *addr4;
1196#if IS_ENABLED(CONFIG_IPV6)
1197 struct netlbl_af6list *addr6;
1198#endif
1199
1200 cb_arg.nl_cb = cb;
1201 cb_arg.skb = skb;
1202 cb_arg.seq = cb->nlh->nlmsg_seq;
1203
1204 rcu_read_lock();
1205 for (iter_bkt = skip_bkt;
1206 iter_bkt < rcu_dereference(netlbl_unlhsh)->size;
1207 iter_bkt++, iter_chain = 0, iter_addr4 = 0, iter_addr6 = 0) {
1208 iter_list = &rcu_dereference(netlbl_unlhsh)->tbl[iter_bkt];
1209 list_for_each_entry_rcu(iface, iter_list, list) {
1210 if (!iface->valid ||
1211 iter_chain++ < skip_chain)
1212 continue;
1213 netlbl_af4list_foreach_rcu(addr4,
1214 &iface->addr4_list) {
1215 if (iter_addr4++ < cb->args[2])
1216 continue;
1217 if (netlbl_unlabel_staticlist_gen(
1218 NLBL_UNLABEL_C_STATICLIST,
1219 iface,
1220 netlbl_unlhsh_addr4_entry(addr4),
1221 NULL,
1222 &cb_arg) < 0) {
1223 iter_addr4--;
1224 iter_chain--;
1225 goto unlabel_staticlist_return;
1226 }
1227 }
1228#if IS_ENABLED(CONFIG_IPV6)
1229 netlbl_af6list_foreach_rcu(addr6,
1230 &iface->addr6_list) {
1231 if (iter_addr6++ < cb->args[3])
1232 continue;
1233 if (netlbl_unlabel_staticlist_gen(
1234 NLBL_UNLABEL_C_STATICLIST,
1235 iface,
1236 NULL,
1237 netlbl_unlhsh_addr6_entry(addr6),
1238 &cb_arg) < 0) {
1239 iter_addr6--;
1240 iter_chain--;
1241 goto unlabel_staticlist_return;
1242 }
1243 }
1244#endif
1245 }
1246 }
1247
1248unlabel_staticlist_return:
1249 rcu_read_unlock();
1250 cb->args[0] = iter_bkt;
1251 cb->args[1] = iter_chain;
1252 cb->args[2] = iter_addr4;
1253 cb->args[3] = iter_addr6;
1254 return skb->len;
1255}
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268static int netlbl_unlabel_staticlistdef(struct sk_buff *skb,
1269 struct netlink_callback *cb)
1270{
1271 struct netlbl_unlhsh_walk_arg cb_arg;
1272 struct netlbl_unlhsh_iface *iface;
1273 u32 iter_addr4 = 0, iter_addr6 = 0;
1274 struct netlbl_af4list *addr4;
1275#if IS_ENABLED(CONFIG_IPV6)
1276 struct netlbl_af6list *addr6;
1277#endif
1278
1279 cb_arg.nl_cb = cb;
1280 cb_arg.skb = skb;
1281 cb_arg.seq = cb->nlh->nlmsg_seq;
1282
1283 rcu_read_lock();
1284 iface = rcu_dereference(netlbl_unlhsh_def);
1285 if (iface == NULL || !iface->valid)
1286 goto unlabel_staticlistdef_return;
1287
1288 netlbl_af4list_foreach_rcu(addr4, &iface->addr4_list) {
1289 if (iter_addr4++ < cb->args[0])
1290 continue;
1291 if (netlbl_unlabel_staticlist_gen(NLBL_UNLABEL_C_STATICLISTDEF,
1292 iface,
1293 netlbl_unlhsh_addr4_entry(addr4),
1294 NULL,
1295 &cb_arg) < 0) {
1296 iter_addr4--;
1297 goto unlabel_staticlistdef_return;
1298 }
1299 }
1300#if IS_ENABLED(CONFIG_IPV6)
1301 netlbl_af6list_foreach_rcu(addr6, &iface->addr6_list) {
1302 if (iter_addr6++ < cb->args[1])
1303 continue;
1304 if (netlbl_unlabel_staticlist_gen(NLBL_UNLABEL_C_STATICLISTDEF,
1305 iface,
1306 NULL,
1307 netlbl_unlhsh_addr6_entry(addr6),
1308 &cb_arg) < 0) {
1309 iter_addr6--;
1310 goto unlabel_staticlistdef_return;
1311 }
1312 }
1313#endif
1314
1315unlabel_staticlistdef_return:
1316 rcu_read_unlock();
1317 cb->args[0] = iter_addr4;
1318 cb->args[1] = iter_addr6;
1319 return skb->len;
1320}
1321
1322
1323
1324
1325
1326static struct genl_ops netlbl_unlabel_genl_ops[] = {
1327 {
1328 .cmd = NLBL_UNLABEL_C_STATICADD,
1329 .flags = GENL_ADMIN_PERM,
1330 .policy = netlbl_unlabel_genl_policy,
1331 .doit = netlbl_unlabel_staticadd,
1332 .dumpit = NULL,
1333 },
1334 {
1335 .cmd = NLBL_UNLABEL_C_STATICREMOVE,
1336 .flags = GENL_ADMIN_PERM,
1337 .policy = netlbl_unlabel_genl_policy,
1338 .doit = netlbl_unlabel_staticremove,
1339 .dumpit = NULL,
1340 },
1341 {
1342 .cmd = NLBL_UNLABEL_C_STATICLIST,
1343 .flags = 0,
1344 .policy = netlbl_unlabel_genl_policy,
1345 .doit = NULL,
1346 .dumpit = netlbl_unlabel_staticlist,
1347 },
1348 {
1349 .cmd = NLBL_UNLABEL_C_STATICADDDEF,
1350 .flags = GENL_ADMIN_PERM,
1351 .policy = netlbl_unlabel_genl_policy,
1352 .doit = netlbl_unlabel_staticadddef,
1353 .dumpit = NULL,
1354 },
1355 {
1356 .cmd = NLBL_UNLABEL_C_STATICREMOVEDEF,
1357 .flags = GENL_ADMIN_PERM,
1358 .policy = netlbl_unlabel_genl_policy,
1359 .doit = netlbl_unlabel_staticremovedef,
1360 .dumpit = NULL,
1361 },
1362 {
1363 .cmd = NLBL_UNLABEL_C_STATICLISTDEF,
1364 .flags = 0,
1365 .policy = netlbl_unlabel_genl_policy,
1366 .doit = NULL,
1367 .dumpit = netlbl_unlabel_staticlistdef,
1368 },
1369 {
1370 .cmd = NLBL_UNLABEL_C_ACCEPT,
1371 .flags = GENL_ADMIN_PERM,
1372 .policy = netlbl_unlabel_genl_policy,
1373 .doit = netlbl_unlabel_accept,
1374 .dumpit = NULL,
1375 },
1376 {
1377 .cmd = NLBL_UNLABEL_C_LIST,
1378 .flags = 0,
1379 .policy = netlbl_unlabel_genl_policy,
1380 .doit = netlbl_unlabel_list,
1381 .dumpit = NULL,
1382 },
1383};
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397int __init netlbl_unlabel_genl_init(void)
1398{
1399 return genl_register_family_with_ops(&netlbl_unlabel_gnl_family,
1400 netlbl_unlabel_genl_ops, ARRAY_SIZE(netlbl_unlabel_genl_ops));
1401}
1402
1403
1404
1405
1406
1407static struct notifier_block netlbl_unlhsh_netdev_notifier = {
1408 .notifier_call = netlbl_unlhsh_netdev_handler,
1409};
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422int __init netlbl_unlabel_init(u32 size)
1423{
1424 u32 iter;
1425 struct netlbl_unlhsh_tbl *hsh_tbl;
1426
1427 if (size == 0)
1428 return -EINVAL;
1429
1430 hsh_tbl = kmalloc(sizeof(*hsh_tbl), GFP_KERNEL);
1431 if (hsh_tbl == NULL)
1432 return -ENOMEM;
1433 hsh_tbl->size = 1 << size;
1434 hsh_tbl->tbl = kcalloc(hsh_tbl->size,
1435 sizeof(struct list_head),
1436 GFP_KERNEL);
1437 if (hsh_tbl->tbl == NULL) {
1438 kfree(hsh_tbl);
1439 return -ENOMEM;
1440 }
1441 for (iter = 0; iter < hsh_tbl->size; iter++)
1442 INIT_LIST_HEAD(&hsh_tbl->tbl[iter]);
1443
1444 spin_lock(&netlbl_unlhsh_lock);
1445 rcu_assign_pointer(netlbl_unlhsh, hsh_tbl);
1446 spin_unlock(&netlbl_unlhsh_lock);
1447
1448 register_netdevice_notifier(&netlbl_unlhsh_netdev_notifier);
1449
1450 return 0;
1451}
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464int netlbl_unlabel_getattr(const struct sk_buff *skb,
1465 u16 family,
1466 struct netlbl_lsm_secattr *secattr)
1467{
1468 struct netlbl_unlhsh_iface *iface;
1469
1470 rcu_read_lock();
1471 iface = netlbl_unlhsh_search_iface(skb->skb_iif);
1472 if (iface == NULL)
1473 iface = rcu_dereference(netlbl_unlhsh_def);
1474 if (iface == NULL || !iface->valid)
1475 goto unlabel_getattr_nolabel;
1476 switch (family) {
1477 case PF_INET: {
1478 struct iphdr *hdr4;
1479 struct netlbl_af4list *addr4;
1480
1481 hdr4 = ip_hdr(skb);
1482 addr4 = netlbl_af4list_search(hdr4->saddr,
1483 &iface->addr4_list);
1484 if (addr4 == NULL)
1485 goto unlabel_getattr_nolabel;
1486 secattr->attr.secid = netlbl_unlhsh_addr4_entry(addr4)->secid;
1487 break;
1488 }
1489#if IS_ENABLED(CONFIG_IPV6)
1490 case PF_INET6: {
1491 struct ipv6hdr *hdr6;
1492 struct netlbl_af6list *addr6;
1493
1494 hdr6 = ipv6_hdr(skb);
1495 addr6 = netlbl_af6list_search(&hdr6->saddr,
1496 &iface->addr6_list);
1497 if (addr6 == NULL)
1498 goto unlabel_getattr_nolabel;
1499 secattr->attr.secid = netlbl_unlhsh_addr6_entry(addr6)->secid;
1500 break;
1501 }
1502#endif
1503 default:
1504 goto unlabel_getattr_nolabel;
1505 }
1506 rcu_read_unlock();
1507
1508 secattr->flags |= NETLBL_SECATTR_SECID;
1509 secattr->type = NETLBL_NLTYPE_UNLABELED;
1510 return 0;
1511
1512unlabel_getattr_nolabel:
1513 rcu_read_unlock();
1514 if (netlabel_unlabel_acceptflg == 0)
1515 return -ENOMSG;
1516 secattr->type = NETLBL_NLTYPE_UNLABELED;
1517 return 0;
1518}
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528int __init netlbl_unlabel_defconf(void)
1529{
1530 int ret_val;
1531 struct netlbl_dom_map *entry;
1532 struct netlbl_audit audit_info;
1533
1534
1535
1536
1537 security_task_getsecid(current, &audit_info.secid);
1538 audit_info.loginuid = GLOBAL_ROOT_UID;
1539 audit_info.sessionid = 0;
1540
1541 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
1542 if (entry == NULL)
1543 return -ENOMEM;
1544 entry->def.type = NETLBL_NLTYPE_UNLABELED;
1545 ret_val = netlbl_domhsh_add_default(entry, &audit_info);
1546 if (ret_val != 0)
1547 return ret_val;
1548
1549 netlbl_unlabel_acceptflg_set(1, &audit_info);
1550
1551 return 0;
1552}
1553