1
2
3
4
5
6
7
8
9#ifndef _SECURITY_SMACK_H
10#define _SECURITY_SMACK_H
11
12#include <linux/capability.h>
13#include <linux/spinlock.h>
14#include <linux/lsm_hooks.h>
15#include <linux/in.h>
16#if IS_ENABLED(CONFIG_IPV6)
17#include <linux/in6.h>
18#endif
19#include <net/netlabel.h>
20#include <linux/list.h>
21#include <linux/rculist.h>
22#include <linux/lsm_audit.h>
23#include <linux/msg.h>
24
25
26
27
28
29#if IS_ENABLED(CONFIG_IPV6) && !defined(CONFIG_SECURITY_SMACK_NETFILTER)
30#define SMACK_IPV6_PORT_LABELING 1
31#endif
32
33#if IS_ENABLED(CONFIG_IPV6) && defined(CONFIG_SECURITY_SMACK_NETFILTER)
34#define SMACK_IPV6_SECMARK_LABELING 1
35#endif
36
37
38
39
40#define SMK_LABELLEN 24
41#define SMK_LONGLABEL 256
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66struct smack_known {
67 struct list_head list;
68 struct hlist_node smk_hashed;
69 char *smk_known;
70 u32 smk_secid;
71 struct netlbl_lsm_secattr smk_netlabel;
72 struct list_head smk_rules;
73 struct mutex smk_rules_lock;
74};
75
76
77
78
79
80
81
82
83#define SMK_CIPSOLEN 24
84
85struct superblock_smack {
86 struct smack_known *smk_root;
87 struct smack_known *smk_floor;
88 struct smack_known *smk_hat;
89 struct smack_known *smk_default;
90 int smk_flags;
91};
92
93
94
95
96#define SMK_SB_INITIALIZED 0x01
97#define SMK_SB_UNTRUSTED 0x02
98
99struct socket_smack {
100 struct smack_known *smk_out;
101 struct smack_known *smk_in;
102 struct smack_known *smk_packet;
103 int smk_state;
104};
105#define SMK_NETLBL_UNSET 0
106#define SMK_NETLBL_UNLABELED 1
107#define SMK_NETLBL_LABELED 2
108#define SMK_NETLBL_REQSKB 3
109
110
111
112
113struct inode_smack {
114 struct smack_known *smk_inode;
115 struct smack_known *smk_task;
116 struct smack_known *smk_mmap;
117 int smk_flags;
118};
119
120struct task_smack {
121 struct smack_known *smk_task;
122 struct smack_known *smk_forked;
123 struct list_head smk_rules;
124 struct mutex smk_rules_lock;
125 struct list_head smk_relabel;
126};
127
128#define SMK_INODE_INSTANT 0x01
129#define SMK_INODE_TRANSMUTE 0x02
130#define SMK_INODE_CHANGED 0x04
131#define SMK_INODE_IMPURE 0x08
132
133
134
135
136struct smack_rule {
137 struct list_head list;
138 struct smack_known *smk_subject;
139 struct smack_known *smk_object;
140 int smk_access;
141};
142
143
144
145
146struct smk_net4addr {
147 struct list_head list;
148 struct in_addr smk_host;
149 struct in_addr smk_mask;
150 int smk_masks;
151 struct smack_known *smk_label;
152};
153
154
155
156
157struct smk_net6addr {
158 struct list_head list;
159 struct in6_addr smk_host;
160 struct in6_addr smk_mask;
161 int smk_masks;
162 struct smack_known *smk_label;
163};
164
165
166
167
168struct smk_port_label {
169 struct list_head list;
170 struct sock *smk_sock;
171 unsigned short smk_port;
172 struct smack_known *smk_in;
173 struct smack_known *smk_out;
174 short smk_sock_type;
175 short smk_can_reuse;
176};
177
178struct smack_known_list_elem {
179 struct list_head list;
180 struct smack_known *smk_label;
181};
182
183
184#define FSDEFAULT_MNT 0x01
185#define FSFLOOR_MNT 0x02
186#define FSHAT_MNT 0x04
187#define FSROOT_MNT 0x08
188#define FSTRANS_MNT 0x10
189
190#define NUM_SMK_MNT_OPTS 5
191
192enum {
193 Opt_error = -1,
194 Opt_fsdefault = 0,
195 Opt_fsfloor = 1,
196 Opt_fshat = 2,
197 Opt_fsroot = 3,
198 Opt_fstransmute = 4,
199};
200
201#define SMACK_DELETE_OPTION "-DELETE"
202#define SMACK_CIPSO_OPTION "-CIPSO"
203
204
205
206
207#define SMACK_CIPSO_DOI_DEFAULT 3
208#define SMACK_CIPSO_DOI_INVALID -1
209#define SMACK_CIPSO_DIRECT_DEFAULT 250
210#define SMACK_CIPSO_MAPPED_DEFAULT 251
211#define SMACK_CIPSO_MAXLEVEL 255
212
213
214
215
216
217#define SMACK_CIPSO_MAXCATNUM 184
218
219
220
221
222#define SMACK_PTRACE_DEFAULT 0
223#define SMACK_PTRACE_EXACT 1
224#define SMACK_PTRACE_DRACONIAN 2
225#define SMACK_PTRACE_MAX SMACK_PTRACE_DRACONIAN
226
227
228
229
230
231
232#define MAY_TRANSMUTE 0x00001000
233#define MAY_LOCK 0x00002000
234#define MAY_BRINGUP 0x00004000
235
236
237
238
239
240#ifdef CONFIG_SECURITY_SMACK_APPEND_SIGNALS
241#define MAY_DELIVER MAY_APPEND
242#else
243#define MAY_DELIVER MAY_WRITE
244#endif
245
246#define SMACK_BRINGUP_ALLOW 1
247#define SMACK_UNCONFINED_SUBJECT 2
248#define SMACK_UNCONFINED_OBJECT 3
249
250
251
252
253#define MAY_ANYREAD (MAY_READ | MAY_EXEC)
254#define MAY_READWRITE (MAY_READ | MAY_WRITE)
255#define MAY_NOT 0
256
257
258
259
260#define SMK_NUM_ACCESS_TYPE 7
261
262
263struct smack_audit_data {
264 const char *function;
265 char *subject;
266 char *object;
267 char *request;
268 int result;
269};
270
271
272
273
274
275struct smk_audit_info {
276#ifdef CONFIG_AUDIT
277 struct common_audit_data a;
278 struct smack_audit_data sad;
279#endif
280};
281
282
283
284
285int smk_access_entry(char *, char *, struct list_head *);
286int smk_access(struct smack_known *, struct smack_known *,
287 int, struct smk_audit_info *);
288int smk_tskacc(struct task_smack *, struct smack_known *,
289 u32, struct smk_audit_info *);
290int smk_curacc(struct smack_known *, u32, struct smk_audit_info *);
291struct smack_known *smack_from_secid(const u32);
292char *smk_parse_smack(const char *string, int len);
293int smk_netlbl_mls(int, char *, struct netlbl_lsm_secattr *, int);
294struct smack_known *smk_import_entry(const char *, int);
295void smk_insert_entry(struct smack_known *skp);
296struct smack_known *smk_find_entry(const char *);
297bool smack_privileged(int cap);
298bool smack_privileged_cred(int cap, const struct cred *cred);
299void smk_destroy_label_list(struct list_head *list);
300int smack_populate_secattr(struct smack_known *skp);
301
302
303
304
305extern int smack_enabled;
306extern int smack_cipso_direct;
307extern int smack_cipso_mapped;
308extern struct smack_known *smack_net_ambient;
309extern struct smack_known *smack_syslog_label;
310#ifdef CONFIG_SECURITY_SMACK_BRINGUP
311extern struct smack_known *smack_unconfined;
312#endif
313extern int smack_ptrace_rule;
314extern struct lsm_blob_sizes smack_blob_sizes;
315
316extern struct smack_known smack_known_floor;
317extern struct smack_known smack_known_hat;
318extern struct smack_known smack_known_huh;
319extern struct smack_known smack_known_star;
320extern struct smack_known smack_known_web;
321
322extern struct mutex smack_known_lock;
323extern struct list_head smack_known_list;
324extern struct list_head smk_net4addr_list;
325extern struct list_head smk_net6addr_list;
326
327extern struct mutex smack_onlycap_lock;
328extern struct list_head smack_onlycap_list;
329
330#define SMACK_HASH_SLOTS 16
331extern struct hlist_head smack_known_hash[SMACK_HASH_SLOTS];
332extern struct kmem_cache *smack_rule_cache;
333
334static inline struct task_smack *smack_cred(const struct cred *cred)
335{
336 return cred->security + smack_blob_sizes.lbs_cred;
337}
338
339static inline struct smack_known **smack_file(const struct file *file)
340{
341 return (struct smack_known **)(file->f_security +
342 smack_blob_sizes.lbs_file);
343}
344
345static inline struct inode_smack *smack_inode(const struct inode *inode)
346{
347 return inode->i_security + smack_blob_sizes.lbs_inode;
348}
349
350static inline struct smack_known **smack_msg_msg(const struct msg_msg *msg)
351{
352 return msg->security + smack_blob_sizes.lbs_msg_msg;
353}
354
355static inline struct smack_known **smack_ipc(const struct kern_ipc_perm *ipc)
356{
357 return ipc->security + smack_blob_sizes.lbs_ipc;
358}
359
360
361
362
363static inline int smk_inode_transmutable(const struct inode *isp)
364{
365 struct inode_smack *sip = smack_inode(isp);
366 return (sip->smk_flags & SMK_INODE_TRANSMUTE) != 0;
367}
368
369
370
371
372static inline struct smack_known *smk_of_inode(const struct inode *isp)
373{
374 struct inode_smack *sip = smack_inode(isp);
375 return sip->smk_inode;
376}
377
378
379
380
381static inline struct smack_known *smk_of_task(const struct task_smack *tsp)
382{
383 return tsp->smk_task;
384}
385
386static inline struct smack_known *smk_of_task_struct(
387 const struct task_struct *t)
388{
389 struct smack_known *skp;
390 const struct cred *cred;
391
392 rcu_read_lock();
393
394 cred = __task_cred(t);
395 skp = smk_of_task(smack_cred(cred));
396
397 rcu_read_unlock();
398
399 return skp;
400}
401
402
403
404
405static inline struct smack_known *smk_of_forked(const struct task_smack *tsp)
406{
407 return tsp->smk_forked;
408}
409
410
411
412
413static inline struct smack_known *smk_of_current(void)
414{
415 return smk_of_task(smack_cred(current_cred()));
416}
417
418
419
420
421#define SMACK_AUDIT_DENIED 0x1
422#define SMACK_AUDIT_ACCEPT 0x2
423extern int log_policy;
424
425void smack_log(char *subject_label, char *object_label,
426 int request,
427 int result, struct smk_audit_info *auditdata);
428
429#ifdef CONFIG_AUDIT
430
431
432
433
434
435
436static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
437 char type)
438{
439 memset(&a->sad, 0, sizeof(a->sad));
440 a->a.type = type;
441 a->a.smack_audit_data = &a->sad;
442 a->a.smack_audit_data->function = func;
443}
444
445static inline void smk_ad_init_net(struct smk_audit_info *a, const char *func,
446 char type, struct lsm_network_audit *net)
447{
448 smk_ad_init(a, func, type);
449 memset(net, 0, sizeof(*net));
450 a->a.u.net = net;
451}
452
453static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
454 struct task_struct *t)
455{
456 a->a.u.tsk = t;
457}
458static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
459 struct dentry *d)
460{
461 a->a.u.dentry = d;
462}
463static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
464 struct inode *i)
465{
466 a->a.u.inode = i;
467}
468static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
469 struct path p)
470{
471 a->a.u.path = p;
472}
473static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
474 struct sock *sk)
475{
476 a->a.u.net->sk = sk;
477}
478
479#else
480
481static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
482 char type)
483{
484}
485static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
486 struct task_struct *t)
487{
488}
489static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
490 struct dentry *d)
491{
492}
493static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
494 struct inode *i)
495{
496}
497static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
498 struct path p)
499{
500}
501static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
502 struct sock *sk)
503{
504}
505#endif
506
507#endif
508