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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
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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
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38
39
40#define SMK_LABELLEN 24
41#define SMK_LONGLABEL 256
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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};
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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
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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};
104
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107
108struct inode_smack {
109 struct smack_known *smk_inode;
110 struct smack_known *smk_task;
111 struct smack_known *smk_mmap;
112 struct mutex smk_lock;
113 int smk_flags;
114 struct rcu_head smk_rcu;
115};
116
117struct task_smack {
118 struct smack_known *smk_task;
119 struct smack_known *smk_forked;
120 struct list_head smk_rules;
121 struct mutex smk_rules_lock;
122 struct list_head smk_relabel;
123};
124
125#define SMK_INODE_INSTANT 0x01
126#define SMK_INODE_TRANSMUTE 0x02
127#define SMK_INODE_CHANGED 0x04
128#define SMK_INODE_IMPURE 0x08
129
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132
133struct smack_rule {
134 struct list_head list;
135 struct smack_known *smk_subject;
136 struct smack_known *smk_object;
137 int smk_access;
138};
139
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142
143struct smk_net4addr {
144 struct list_head list;
145 struct in_addr smk_host;
146 struct in_addr smk_mask;
147 int smk_masks;
148 struct smack_known *smk_label;
149};
150
151#if IS_ENABLED(CONFIG_IPV6)
152
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154
155struct smk_net6addr {
156 struct list_head list;
157 struct in6_addr smk_host;
158 struct in6_addr smk_mask;
159 int smk_masks;
160 struct smack_known *smk_label;
161};
162#endif
163
164#ifdef SMACK_IPV6_PORT_LABELING
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#endif
178
179struct smack_known_list_elem {
180 struct list_head list;
181 struct smack_known *smk_label;
182};
183
184
185#define FSDEFAULT_MNT 0x01
186#define FSFLOOR_MNT 0x02
187#define FSHAT_MNT 0x04
188#define FSROOT_MNT 0x08
189#define FSTRANS_MNT 0x10
190
191#define NUM_SMK_MNT_OPTS 5
192
193enum {
194 Opt_error = -1,
195 Opt_fsdefault = 0,
196 Opt_fsfloor = 1,
197 Opt_fshat = 2,
198 Opt_fsroot = 3,
199 Opt_fstransmute = 4,
200};
201
202#define SMACK_DELETE_OPTION "-DELETE"
203#define SMACK_CIPSO_OPTION "-CIPSO"
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214
215#define SMACK_UNLABELED_SOCKET 0
216#define SMACK_CIPSO_SOCKET 1
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221#define SMACK_CIPSO_DOI_DEFAULT 3
222#define SMACK_CIPSO_DOI_INVALID -1
223#define SMACK_CIPSO_DIRECT_DEFAULT 250
224#define SMACK_CIPSO_MAPPED_DEFAULT 251
225#define SMACK_CIPSO_MAXLEVEL 255
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231#define SMACK_CIPSO_MAXCATNUM 184
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236#define SMACK_PTRACE_DEFAULT 0
237#define SMACK_PTRACE_EXACT 1
238#define SMACK_PTRACE_DRACONIAN 2
239#define SMACK_PTRACE_MAX SMACK_PTRACE_DRACONIAN
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245
246#define MAY_TRANSMUTE 0x00001000
247#define MAY_LOCK 0x00002000
248#define MAY_BRINGUP 0x00004000
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253
254#ifdef CONFIG_SECURITY_SMACK_APPEND_SIGNALS
255#define MAY_DELIVER MAY_APPEND
256#else
257#define MAY_DELIVER MAY_WRITE
258#endif
259
260#define SMACK_BRINGUP_ALLOW 1
261#define SMACK_UNCONFINED_SUBJECT 2
262#define SMACK_UNCONFINED_OBJECT 3
263
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266
267#define MAY_ANYREAD (MAY_READ | MAY_EXEC)
268#define MAY_READWRITE (MAY_READ | MAY_WRITE)
269#define MAY_NOT 0
270
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272
273
274#define SMK_NUM_ACCESS_TYPE 7
275
276
277struct smack_audit_data {
278 const char *function;
279 char *subject;
280 char *object;
281 char *request;
282 int result;
283};
284
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289struct smk_audit_info {
290#ifdef CONFIG_AUDIT
291 struct common_audit_data a;
292 struct smack_audit_data sad;
293#endif
294};
295
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298
299int smk_access_entry(char *, char *, struct list_head *);
300int smk_access(struct smack_known *, struct smack_known *,
301 int, struct smk_audit_info *);
302int smk_tskacc(struct task_smack *, struct smack_known *,
303 u32, struct smk_audit_info *);
304int smk_curacc(struct smack_known *, u32, struct smk_audit_info *);
305struct smack_known *smack_from_secid(const u32);
306char *smk_parse_smack(const char *string, int len);
307int smk_netlbl_mls(int, char *, struct netlbl_lsm_secattr *, int);
308struct smack_known *smk_import_entry(const char *, int);
309void smk_insert_entry(struct smack_known *skp);
310struct smack_known *smk_find_entry(const char *);
311bool smack_privileged(int cap);
312bool smack_privileged_cred(int cap, const struct cred *cred);
313void smk_destroy_label_list(struct list_head *list);
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318extern int smack_enabled;
319extern int smack_cipso_direct;
320extern int smack_cipso_mapped;
321extern struct smack_known *smack_net_ambient;
322extern struct smack_known *smack_syslog_label;
323#ifdef CONFIG_SECURITY_SMACK_BRINGUP
324extern struct smack_known *smack_unconfined;
325#endif
326extern int smack_ptrace_rule;
327extern struct lsm_blob_sizes smack_blob_sizes;
328
329extern struct smack_known smack_known_floor;
330extern struct smack_known smack_known_hat;
331extern struct smack_known smack_known_huh;
332extern struct smack_known smack_known_star;
333extern struct smack_known smack_known_web;
334
335extern struct mutex smack_known_lock;
336extern struct list_head smack_known_list;
337extern struct list_head smk_net4addr_list;
338#if IS_ENABLED(CONFIG_IPV6)
339extern struct list_head smk_net6addr_list;
340#endif
341
342extern struct mutex smack_onlycap_lock;
343extern struct list_head smack_onlycap_list;
344
345#define SMACK_HASH_SLOTS 16
346extern struct hlist_head smack_known_hash[SMACK_HASH_SLOTS];
347extern struct kmem_cache *smack_rule_cache;
348
349static inline struct task_smack *smack_cred(const struct cred *cred)
350{
351 return cred->security + smack_blob_sizes.lbs_cred;
352}
353
354static inline struct smack_known **smack_file(const struct file *file)
355{
356 return (struct smack_known **)(file->f_security +
357 smack_blob_sizes.lbs_file);
358}
359
360static inline struct inode_smack *smack_inode(const struct inode *inode)
361{
362 return inode->i_security + smack_blob_sizes.lbs_inode;
363}
364
365static inline struct smack_known **smack_msg_msg(const struct msg_msg *msg)
366{
367 return msg->security + smack_blob_sizes.lbs_msg_msg;
368}
369
370static inline struct smack_known **smack_ipc(const struct kern_ipc_perm *ipc)
371{
372 return ipc->security + smack_blob_sizes.lbs_ipc;
373}
374
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378static inline int smk_inode_transmutable(const struct inode *isp)
379{
380 struct inode_smack *sip = smack_inode(isp);
381 return (sip->smk_flags & SMK_INODE_TRANSMUTE) != 0;
382}
383
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387static inline struct smack_known *smk_of_inode(const struct inode *isp)
388{
389 struct inode_smack *sip = smack_inode(isp);
390 return sip->smk_inode;
391}
392
393
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396static inline struct smack_known *smk_of_task(const struct task_smack *tsp)
397{
398 return tsp->smk_task;
399}
400
401static inline struct smack_known *smk_of_task_struct(
402 const struct task_struct *t)
403{
404 struct smack_known *skp;
405 const struct cred *cred;
406
407 rcu_read_lock();
408
409 cred = __task_cred(t);
410 skp = smk_of_task(smack_cred(cred));
411
412 rcu_read_unlock();
413
414 return skp;
415}
416
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420static inline struct smack_known *smk_of_forked(const struct task_smack *tsp)
421{
422 return tsp->smk_forked;
423}
424
425
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428static inline struct smack_known *smk_of_current(void)
429{
430 return smk_of_task(smack_cred(current_cred()));
431}
432
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434
435
436#define SMACK_AUDIT_DENIED 0x1
437#define SMACK_AUDIT_ACCEPT 0x2
438extern int log_policy;
439
440void smack_log(char *subject_label, char *object_label,
441 int request,
442 int result, struct smk_audit_info *auditdata);
443
444#ifdef CONFIG_AUDIT
445
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450
451static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
452 char type)
453{
454 memset(&a->sad, 0, sizeof(a->sad));
455 a->a.type = type;
456 a->a.smack_audit_data = &a->sad;
457 a->a.smack_audit_data->function = func;
458}
459
460static inline void smk_ad_init_net(struct smk_audit_info *a, const char *func,
461 char type, struct lsm_network_audit *net)
462{
463 smk_ad_init(a, func, type);
464 memset(net, 0, sizeof(*net));
465 a->a.u.net = net;
466}
467
468static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
469 struct task_struct *t)
470{
471 a->a.u.tsk = t;
472}
473static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
474 struct dentry *d)
475{
476 a->a.u.dentry = d;
477}
478static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
479 struct inode *i)
480{
481 a->a.u.inode = i;
482}
483static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
484 struct path p)
485{
486 a->a.u.path = p;
487}
488static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
489 struct sock *sk)
490{
491 a->a.u.net->sk = sk;
492}
493
494#else
495
496static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
497 char type)
498{
499}
500static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
501 struct task_struct *t)
502{
503}
504static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
505 struct dentry *d)
506{
507}
508static inline void smk_ad_setfield_u_fs_path_mnt(struct smk_audit_info *a,
509 struct vfsmount *m)
510{
511}
512static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
513 struct inode *i)
514{
515}
516static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
517 struct path p)
518{
519}
520static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
521 struct sock *sk)
522{
523}
524#endif
525
526#endif
527