1 // SPDX-License-Identifier: GPL-2.0-only
9 * Special thanks to the authors of selinuxfs.
15 #include <linux/kernel.h>
16 #include <linux/vmalloc.h>
17 #include <linux/security.h>
18 #include <linux/mutex.h>
19 #include <linux/slab.h>
20 #include <net/net_namespace.h>
21 #include <net/cipso_ipv4.h>
22 #include <linux/seq_file.h>
23 #include <linux/ctype.h>
24 #include <linux/audit.h>
25 #include <linux/magic.h>
26 #include <linux/fs_context.h>
29 #define BEBITS (sizeof(__be32) * 8)
31 * smackfs pseudo filesystem.
36 SMK_LOAD = 3, /* load policy */
37 SMK_CIPSO = 4, /* load label -> CIPSO mapping */
38 SMK_DOI = 5, /* CIPSO DOI */
39 SMK_DIRECT = 6, /* CIPSO level indicating direct label */
40 SMK_AMBIENT = 7, /* internet ambient label */
41 SMK_NET4ADDR = 8, /* single label hosts */
42 SMK_ONLYCAP = 9, /* the only "capable" label */
43 SMK_LOGGING = 10, /* logging */
44 SMK_LOAD_SELF = 11, /* task specific rules */
45 SMK_ACCESSES = 12, /* access policy */
46 SMK_MAPPED = 13, /* CIPSO level indicating mapped label */
47 SMK_LOAD2 = 14, /* load policy with long labels */
48 SMK_LOAD_SELF2 = 15, /* load task specific rules with long labels */
49 SMK_ACCESS2 = 16, /* make an access check with long labels */
50 SMK_CIPSO2 = 17, /* load long label -> CIPSO mapping */
51 SMK_REVOKE_SUBJ = 18, /* set rules with subject label to '-' */
52 SMK_CHANGE_RULE = 19, /* change or add rules (long labels) */
53 SMK_SYSLOG = 20, /* change syslog label) */
54 SMK_PTRACE = 21, /* set ptrace rule */
55 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
56 SMK_UNCONFINED = 22, /* define an unconfined label */
58 #if IS_ENABLED(CONFIG_IPV6)
59 SMK_NET6ADDR = 23, /* single label IPv6 hosts */
60 #endif /* CONFIG_IPV6 */
61 SMK_RELABEL_SELF = 24, /* relabel possible without CAP_MAC_ADMIN */
67 static DEFINE_MUTEX(smack_cipso_lock);
68 static DEFINE_MUTEX(smack_ambient_lock);
69 static DEFINE_MUTEX(smk_net4addr_lock);
70 #if IS_ENABLED(CONFIG_IPV6)
71 static DEFINE_MUTEX(smk_net6addr_lock);
72 #endif /* CONFIG_IPV6 */
75 * This is the "ambient" label for network traffic.
76 * If it isn't somehow marked, use this.
77 * It can be reset via smackfs/ambient
79 struct smack_known *smack_net_ambient;
82 * This is the level in a CIPSO header that indicates a
83 * smack label is contained directly in the category set.
84 * It can be reset via smackfs/direct
86 int smack_cipso_direct = SMACK_CIPSO_DIRECT_DEFAULT;
89 * This is the level in a CIPSO header that indicates a
90 * secid is contained directly in the category set.
91 * It can be reset via smackfs/mapped
93 int smack_cipso_mapped = SMACK_CIPSO_MAPPED_DEFAULT;
95 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
97 * Allow one label to be unconfined. This is for
98 * debugging and application bring-up purposes only.
99 * It is bad and wrong, but everyone seems to expect
102 struct smack_known *smack_unconfined;
106 * If this value is set restrict syslog use to the label specified.
107 * It can be reset via smackfs/syslog
109 struct smack_known *smack_syslog_label;
112 * Ptrace current rule
113 * SMACK_PTRACE_DEFAULT regular smack ptrace rules (/proc based)
114 * SMACK_PTRACE_EXACT labels must match, but can be overriden with
116 * SMACK_PTRACE_DRACONIAN lables must match, CAP_SYS_PTRACE has no effect
118 int smack_ptrace_rule = SMACK_PTRACE_DEFAULT;
121 * Certain IP addresses may be designated as single label hosts.
122 * Packets are sent there unlabeled, but only from tasks that
123 * can write to the specified label.
126 LIST_HEAD(smk_net4addr_list);
127 #if IS_ENABLED(CONFIG_IPV6)
128 LIST_HEAD(smk_net6addr_list);
129 #endif /* CONFIG_IPV6 */
132 * Rule lists are maintained for each label.
134 struct smack_parsed_rule {
135 struct smack_known *smk_subject;
136 struct smack_known *smk_object;
141 static int smk_cipso_doi_value = SMACK_CIPSO_DOI_DEFAULT;
144 * Values for parsing cipso rules
145 * SMK_DIGITLEN: Length of a digit field in a rule.
146 * SMK_CIPSOMIN: Minimum possible cipso rule length.
147 * SMK_CIPSOMAX: Maximum possible cipso rule length.
149 #define SMK_DIGITLEN 4
150 #define SMK_CIPSOMIN (SMK_LABELLEN + 2 * SMK_DIGITLEN)
151 #define SMK_CIPSOMAX (SMK_CIPSOMIN + SMACK_CIPSO_MAXCATNUM * SMK_DIGITLEN)
154 * Values for parsing MAC rules
155 * SMK_ACCESS: Maximum possible combination of access permissions
156 * SMK_ACCESSLEN: Maximum length for a rule access field
157 * SMK_LOADLEN: Smack rule length
159 #define SMK_OACCESS "rwxa"
160 #define SMK_ACCESS "rwxatl"
161 #define SMK_OACCESSLEN (sizeof(SMK_OACCESS) - 1)
162 #define SMK_ACCESSLEN (sizeof(SMK_ACCESS) - 1)
163 #define SMK_OLOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_OACCESSLEN)
164 #define SMK_LOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_ACCESSLEN)
167 * Stricly for CIPSO level manipulation.
168 * Set the category bit number in a smack label sized buffer.
170 static inline void smack_catset_bit(unsigned int cat, char *catsetp)
172 if (cat == 0 || cat > (SMK_CIPSOLEN * 8))
175 catsetp[(cat - 1) / 8] |= 0x80 >> ((cat - 1) % 8);
179 * smk_netlabel_audit_set - fill a netlbl_audit struct
180 * @nap: structure to fill
182 static void smk_netlabel_audit_set(struct netlbl_audit *nap)
184 struct smack_known *skp = smk_of_current();
186 nap->loginuid = audit_get_loginuid(current);
187 nap->sessionid = audit_get_sessionid(current);
188 nap->secid = skp->smk_secid;
192 * Value for parsing single label host rules
195 #define SMK_NETLBLADDRMIN 9
198 * smk_set_access - add a rule to the rule list or replace an old rule
199 * @srp: the rule to add or replace
200 * @rule_list: the list of rules
201 * @rule_lock: the rule list lock
203 * Looks through the current subject/object/access list for
204 * the subject/object pair and replaces the access that was
205 * there. If the pair isn't found add it with the specified
208 * Returns 0 if nothing goes wrong or -ENOMEM if it fails
209 * during the allocation of the new pair to add.
211 static int smk_set_access(struct smack_parsed_rule *srp,
212 struct list_head *rule_list,
213 struct mutex *rule_lock)
215 struct smack_rule *sp;
219 mutex_lock(rule_lock);
222 * Because the object label is less likely to match
223 * than the subject label check it first
225 list_for_each_entry_rcu(sp, rule_list, list) {
226 if (sp->smk_object == srp->smk_object &&
227 sp->smk_subject == srp->smk_subject) {
229 sp->smk_access |= srp->smk_access1;
230 sp->smk_access &= ~srp->smk_access2;
236 sp = kmem_cache_zalloc(smack_rule_cache, GFP_KERNEL);
242 sp->smk_subject = srp->smk_subject;
243 sp->smk_object = srp->smk_object;
244 sp->smk_access = srp->smk_access1 & ~srp->smk_access2;
246 list_add_rcu(&sp->list, rule_list);
250 mutex_unlock(rule_lock);
255 * smk_perm_from_str - parse smack accesses from a text string
256 * @string: a text string that contains a Smack accesses code
258 * Returns an integer with respective bits set for specified accesses.
260 static int smk_perm_from_str(const char *string)
265 for (cp = string; ; cp++)
287 perm |= MAY_TRANSMUTE;
303 * smk_fill_rule - Fill Smack rule from strings
304 * @subject: subject label string
305 * @object: object label string
306 * @access1: access string
307 * @access2: string with permissions to be removed
309 * @import: if non-zero, import labels
310 * @len: label length limit
312 * Returns 0 on success, appropriate error code on failure.
314 static int smk_fill_rule(const char *subject, const char *object,
315 const char *access1, const char *access2,
316 struct smack_parsed_rule *rule, int import,
320 struct smack_known *skp;
323 rule->smk_subject = smk_import_entry(subject, len);
324 if (IS_ERR(rule->smk_subject))
325 return PTR_ERR(rule->smk_subject);
327 rule->smk_object = smk_import_entry(object, len);
328 if (IS_ERR(rule->smk_object))
329 return PTR_ERR(rule->smk_object);
331 cp = smk_parse_smack(subject, len);
334 skp = smk_find_entry(cp);
338 rule->smk_subject = skp;
340 cp = smk_parse_smack(object, len);
343 skp = smk_find_entry(cp);
347 rule->smk_object = skp;
350 rule->smk_access1 = smk_perm_from_str(access1);
352 rule->smk_access2 = smk_perm_from_str(access2);
354 rule->smk_access2 = ~rule->smk_access1;
360 * smk_parse_rule - parse Smack rule from load string
361 * @data: string to be parsed whose size is SMK_LOADLEN
363 * @import: if non-zero, import labels
365 * Returns 0 on success, -1 on errors.
367 static int smk_parse_rule(const char *data, struct smack_parsed_rule *rule,
372 rc = smk_fill_rule(data, data + SMK_LABELLEN,
373 data + SMK_LABELLEN + SMK_LABELLEN, NULL, rule,
374 import, SMK_LABELLEN);
379 * smk_parse_long_rule - parse Smack rule from rule string
380 * @data: string to be parsed, null terminated
381 * @rule: Will be filled with Smack parsed rule
382 * @import: if non-zero, import labels
383 * @tokens: numer of substrings expected in data
385 * Returns number of processed bytes on success, -ERRNO on failure.
387 static ssize_t smk_parse_long_rule(char *data, struct smack_parsed_rule *rule,
388 int import, int tokens)
396 * Parsing the rule in-place, filling all white-spaces with '\0'
398 for (i = 0; i < tokens; ++i) {
399 while (isspace(data[cnt]))
402 if (data[cnt] == '\0')
403 /* Unexpected end of data */
408 while (data[cnt] && !isspace(data[cnt]))
411 while (isspace(data[cnt]))
417 rc = smk_fill_rule(tok[0], tok[1], tok[2], tok[3], rule, import, 0);
418 return rc == 0 ? cnt : rc;
421 #define SMK_FIXED24_FMT 0 /* Fixed 24byte label format */
422 #define SMK_LONG_FMT 1 /* Variable long label format */
423 #define SMK_CHANGE_FMT 2 /* Rule modification format */
425 * smk_write_rules_list - write() for any /smack rule file
426 * @file: file pointer, not actually used
427 * @buf: where to get the data from
429 * @ppos: where to start - must be 0
430 * @rule_list: the list of rules to write to
431 * @rule_lock: lock for the rule list
432 * @format: /smack/load or /smack/load2 or /smack/change-rule format.
434 * Get one smack access rule from above.
435 * The format for SMK_LONG_FMT is:
436 * "subject<whitespace>object<whitespace>access[<whitespace>...]"
437 * The format for SMK_FIXED24_FMT is exactly:
438 * "subject object rwxat"
439 * The format for SMK_CHANGE_FMT is:
440 * "subject<whitespace>object<whitespace>
441 * acc_enable<whitespace>acc_disable[<whitespace>...]"
443 static ssize_t smk_write_rules_list(struct file *file, const char __user *buf,
444 size_t count, loff_t *ppos,
445 struct list_head *rule_list,
446 struct mutex *rule_lock, int format)
448 struct smack_parsed_rule rule;
457 * Enough data must be present.
462 if (format == SMK_FIXED24_FMT) {
464 * Minor hack for backward compatibility
466 if (count < SMK_OLOADLEN || count > SMK_LOADLEN)
469 if (count >= PAGE_SIZE) {
470 count = PAGE_SIZE - 1;
475 data = memdup_user_nul(buf, count);
477 return PTR_ERR(data);
480 * In case of parsing only part of user buf,
481 * avoid having partial rule at the data buffer
484 while (count > 0 && (data[count - 1] != '\n'))
493 tokens = (format == SMK_CHANGE_FMT ? 4 : 3);
494 while (cnt < count) {
495 if (format == SMK_FIXED24_FMT) {
496 rc = smk_parse_rule(data, &rule, 1);
501 rc = smk_parse_long_rule(data + cnt, &rule, 1, tokens);
511 if (rule_list == NULL)
512 rc = smk_set_access(&rule, &rule.smk_subject->smk_rules,
513 &rule.smk_subject->smk_rules_lock);
515 rc = smk_set_access(&rule, rule_list, rule_lock);
528 * Core logic for smackfs seq list operations.
531 static void *smk_seq_start(struct seq_file *s, loff_t *pos,
532 struct list_head *head)
534 struct list_head *list;
538 for (list = rcu_dereference(list_next_rcu(head));
540 list = rcu_dereference(list_next_rcu(list))) {
548 static void *smk_seq_next(struct seq_file *s, void *v, loff_t *pos,
549 struct list_head *head)
551 struct list_head *list = v;
554 list = rcu_dereference(list_next_rcu(list));
556 return (list == head) ? NULL : list;
559 static void smk_seq_stop(struct seq_file *s, void *v)
564 static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max)
567 * Don't show any rules with label names too long for
568 * interface file (/smack/load or /smack/load2)
569 * because you should expect to be able to write
570 * anything you read back.
572 if (strlen(srp->smk_subject->smk_known) >= max ||
573 strlen(srp->smk_object->smk_known) >= max)
576 if (srp->smk_access == 0)
579 seq_printf(s, "%s %s",
580 srp->smk_subject->smk_known,
581 srp->smk_object->smk_known);
585 if (srp->smk_access & MAY_READ)
587 if (srp->smk_access & MAY_WRITE)
589 if (srp->smk_access & MAY_EXEC)
591 if (srp->smk_access & MAY_APPEND)
593 if (srp->smk_access & MAY_TRANSMUTE)
595 if (srp->smk_access & MAY_LOCK)
597 if (srp->smk_access & MAY_BRINGUP)
604 * Seq_file read operations for /smack/load
607 static void *load2_seq_start(struct seq_file *s, loff_t *pos)
609 return smk_seq_start(s, pos, &smack_known_list);
612 static void *load2_seq_next(struct seq_file *s, void *v, loff_t *pos)
614 return smk_seq_next(s, v, pos, &smack_known_list);
617 static int load_seq_show(struct seq_file *s, void *v)
619 struct list_head *list = v;
620 struct smack_rule *srp;
621 struct smack_known *skp =
622 list_entry_rcu(list, struct smack_known, list);
624 list_for_each_entry_rcu(srp, &skp->smk_rules, list)
625 smk_rule_show(s, srp, SMK_LABELLEN);
630 static const struct seq_operations load_seq_ops = {
631 .start = load2_seq_start,
632 .next = load2_seq_next,
633 .show = load_seq_show,
634 .stop = smk_seq_stop,
638 * smk_open_load - open() for /smack/load
639 * @inode: inode structure representing file
640 * @file: "load" file pointer
642 * For reading, use load_seq_* seq_file reading operations.
644 static int smk_open_load(struct inode *inode, struct file *file)
646 return seq_open(file, &load_seq_ops);
650 * smk_write_load - write() for /smack/load
651 * @file: file pointer, not actually used
652 * @buf: where to get the data from
654 * @ppos: where to start - must be 0
657 static ssize_t smk_write_load(struct file *file, const char __user *buf,
658 size_t count, loff_t *ppos)
661 * Must have privilege.
663 * Enough data must be present.
665 if (!smack_privileged(CAP_MAC_ADMIN))
668 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
672 static const struct file_operations smk_load_ops = {
673 .open = smk_open_load,
676 .write = smk_write_load,
677 .release = seq_release,
681 * smk_cipso_doi - initialize the CIPSO domain
683 static void smk_cipso_doi(void)
686 struct cipso_v4_doi *doip;
687 struct netlbl_audit nai;
689 smk_netlabel_audit_set(&nai);
691 rc = netlbl_cfg_map_del(NULL, PF_INET, NULL, NULL, &nai);
693 printk(KERN_WARNING "%s:%d remove rc = %d\n",
694 __func__, __LINE__, rc);
696 doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL);
698 panic("smack: Failed to initialize cipso DOI.\n");
699 doip->map.std = NULL;
700 doip->doi = smk_cipso_doi_value;
701 doip->type = CIPSO_V4_MAP_PASS;
702 doip->tags[0] = CIPSO_V4_TAG_RBITMAP;
703 for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++)
704 doip->tags[rc] = CIPSO_V4_TAG_INVALID;
706 rc = netlbl_cfg_cipsov4_add(doip, &nai);
708 printk(KERN_WARNING "%s:%d cipso add rc = %d\n",
709 __func__, __LINE__, rc);
713 rc = netlbl_cfg_cipsov4_map_add(doip->doi, NULL, NULL, NULL, &nai);
715 printk(KERN_WARNING "%s:%d map add rc = %d\n",
716 __func__, __LINE__, rc);
723 * smk_unlbl_ambient - initialize the unlabeled domain
724 * @oldambient: previous domain string
726 static void smk_unlbl_ambient(char *oldambient)
729 struct netlbl_audit nai;
731 smk_netlabel_audit_set(&nai);
733 if (oldambient != NULL) {
734 rc = netlbl_cfg_map_del(oldambient, PF_INET, NULL, NULL, &nai);
736 printk(KERN_WARNING "%s:%d remove rc = %d\n",
737 __func__, __LINE__, rc);
739 if (smack_net_ambient == NULL)
740 smack_net_ambient = &smack_known_floor;
742 rc = netlbl_cfg_unlbl_map_add(smack_net_ambient->smk_known, PF_INET,
745 printk(KERN_WARNING "%s:%d add rc = %d\n",
746 __func__, __LINE__, rc);
750 * Seq_file read operations for /smack/cipso
753 static void *cipso_seq_start(struct seq_file *s, loff_t *pos)
755 return smk_seq_start(s, pos, &smack_known_list);
758 static void *cipso_seq_next(struct seq_file *s, void *v, loff_t *pos)
760 return smk_seq_next(s, v, pos, &smack_known_list);
764 * Print cipso labels in format:
765 * label level[/cat[,cat]]
767 static int cipso_seq_show(struct seq_file *s, void *v)
769 struct list_head *list = v;
770 struct smack_known *skp =
771 list_entry_rcu(list, struct smack_known, list);
772 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
777 * Don't show a label that could not have been set using
778 * /smack/cipso. This is in support of the notion that
779 * anything read from /smack/cipso ought to be writeable
782 * /smack/cipso2 should be used instead.
784 if (strlen(skp->smk_known) >= SMK_LABELLEN)
787 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
789 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
790 i = netlbl_catmap_walk(cmp, i + 1)) {
791 seq_printf(s, "%c%d", sep, i);
800 static const struct seq_operations cipso_seq_ops = {
801 .start = cipso_seq_start,
802 .next = cipso_seq_next,
803 .show = cipso_seq_show,
804 .stop = smk_seq_stop,
808 * smk_open_cipso - open() for /smack/cipso
809 * @inode: inode structure representing file
810 * @file: "cipso" file pointer
812 * Connect our cipso_seq_* operations with /smack/cipso
815 static int smk_open_cipso(struct inode *inode, struct file *file)
817 return seq_open(file, &cipso_seq_ops);
821 * smk_set_cipso - do the work for write() for cipso and cipso2
822 * @file: file pointer, not actually used
823 * @buf: where to get the data from
825 * @ppos: where to start
826 * @format: /smack/cipso or /smack/cipso2
828 * Accepts only one cipso rule per write call.
829 * Returns number of bytes written or error code, as appropriate
831 static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
832 size_t count, loff_t *ppos, int format)
834 struct smack_known *skp;
835 struct netlbl_lsm_secattr ncats;
836 char mapcatset[SMK_CIPSOLEN];
840 ssize_t rc = -EINVAL;
847 * Must have privilege.
849 * Enough data must be present.
851 if (!smack_privileged(CAP_MAC_ADMIN))
855 if (format == SMK_FIXED24_FMT &&
856 (count < SMK_CIPSOMIN || count > SMK_CIPSOMAX))
859 data = memdup_user_nul(buf, count);
861 return PTR_ERR(data);
865 * Only allow one writer at a time. Writes should be
866 * quite rare and small in any case.
868 mutex_lock(&smack_cipso_lock);
870 skp = smk_import_entry(rule, 0);
876 if (format == SMK_FIXED24_FMT)
877 rule += SMK_LABELLEN;
879 rule += strlen(skp->smk_known) + 1;
881 if (rule > data + count) {
886 ret = sscanf(rule, "%d", &maplevel);
887 if (ret != 1 || maplevel > SMACK_CIPSO_MAXLEVEL)
890 rule += SMK_DIGITLEN;
891 if (rule > data + count) {
896 ret = sscanf(rule, "%d", &catlen);
897 if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM)
900 if (format == SMK_FIXED24_FMT &&
901 count != (SMK_CIPSOMIN + catlen * SMK_DIGITLEN))
904 memset(mapcatset, 0, sizeof(mapcatset));
906 for (i = 0; i < catlen; i++) {
907 rule += SMK_DIGITLEN;
908 ret = sscanf(rule, "%u", &cat);
909 if (ret != 1 || cat > SMACK_CIPSO_MAXCATNUM)
912 smack_catset_bit(cat, mapcatset);
915 rc = smk_netlbl_mls(maplevel, mapcatset, &ncats, SMK_CIPSOLEN);
917 netlbl_catmap_free(skp->smk_netlabel.attr.mls.cat);
918 skp->smk_netlabel.attr.mls.cat = ncats.attr.mls.cat;
919 skp->smk_netlabel.attr.mls.lvl = ncats.attr.mls.lvl;
924 mutex_unlock(&smack_cipso_lock);
930 * smk_write_cipso - write() for /smack/cipso
931 * @file: file pointer, not actually used
932 * @buf: where to get the data from
934 * @ppos: where to start
936 * Accepts only one cipso rule per write call.
937 * Returns number of bytes written or error code, as appropriate
939 static ssize_t smk_write_cipso(struct file *file, const char __user *buf,
940 size_t count, loff_t *ppos)
942 return smk_set_cipso(file, buf, count, ppos, SMK_FIXED24_FMT);
945 static const struct file_operations smk_cipso_ops = {
946 .open = smk_open_cipso,
949 .write = smk_write_cipso,
950 .release = seq_release,
954 * Seq_file read operations for /smack/cipso2
958 * Print cipso labels in format:
959 * label level[/cat[,cat]]
961 static int cipso2_seq_show(struct seq_file *s, void *v)
963 struct list_head *list = v;
964 struct smack_known *skp =
965 list_entry_rcu(list, struct smack_known, list);
966 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
970 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
972 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
973 i = netlbl_catmap_walk(cmp, i + 1)) {
974 seq_printf(s, "%c%d", sep, i);
983 static const struct seq_operations cipso2_seq_ops = {
984 .start = cipso_seq_start,
985 .next = cipso_seq_next,
986 .show = cipso2_seq_show,
987 .stop = smk_seq_stop,
991 * smk_open_cipso2 - open() for /smack/cipso2
992 * @inode: inode structure representing file
993 * @file: "cipso2" file pointer
995 * Connect our cipso_seq_* operations with /smack/cipso2
998 static int smk_open_cipso2(struct inode *inode, struct file *file)
1000 return seq_open(file, &cipso2_seq_ops);
1004 * smk_write_cipso2 - write() for /smack/cipso2
1005 * @file: file pointer, not actually used
1006 * @buf: where to get the data from
1007 * @count: bytes sent
1008 * @ppos: where to start
1010 * Accepts only one cipso rule per write call.
1011 * Returns number of bytes written or error code, as appropriate
1013 static ssize_t smk_write_cipso2(struct file *file, const char __user *buf,
1014 size_t count, loff_t *ppos)
1016 return smk_set_cipso(file, buf, count, ppos, SMK_LONG_FMT);
1019 static const struct file_operations smk_cipso2_ops = {
1020 .open = smk_open_cipso2,
1022 .llseek = seq_lseek,
1023 .write = smk_write_cipso2,
1024 .release = seq_release,
1028 * Seq_file read operations for /smack/netlabel
1031 static void *net4addr_seq_start(struct seq_file *s, loff_t *pos)
1033 return smk_seq_start(s, pos, &smk_net4addr_list);
1036 static void *net4addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1038 return smk_seq_next(s, v, pos, &smk_net4addr_list);
1042 * Print host/label pairs
1044 static int net4addr_seq_show(struct seq_file *s, void *v)
1046 struct list_head *list = v;
1047 struct smk_net4addr *skp =
1048 list_entry_rcu(list, struct smk_net4addr, list);
1049 char *kp = SMACK_CIPSO_OPTION;
1051 if (skp->smk_label != NULL)
1052 kp = skp->smk_label->smk_known;
1053 seq_printf(s, "%pI4/%d %s\n", &skp->smk_host.s_addr,
1054 skp->smk_masks, kp);
1059 static const struct seq_operations net4addr_seq_ops = {
1060 .start = net4addr_seq_start,
1061 .next = net4addr_seq_next,
1062 .show = net4addr_seq_show,
1063 .stop = smk_seq_stop,
1067 * smk_open_net4addr - open() for /smack/netlabel
1068 * @inode: inode structure representing file
1069 * @file: "netlabel" file pointer
1071 * Connect our net4addr_seq_* operations with /smack/netlabel
1074 static int smk_open_net4addr(struct inode *inode, struct file *file)
1076 return seq_open(file, &net4addr_seq_ops);
1080 * smk_net4addr_insert
1081 * @new : netlabel to insert
1083 * This helper insert netlabel in the smack_net4addrs list
1084 * sorted by netmask length (longest to smallest)
1085 * locked by &smk_net4addr_lock in smk_write_net4addr
1088 static void smk_net4addr_insert(struct smk_net4addr *new)
1090 struct smk_net4addr *m;
1091 struct smk_net4addr *m_next;
1093 if (list_empty(&smk_net4addr_list)) {
1094 list_add_rcu(&new->list, &smk_net4addr_list);
1098 m = list_entry_rcu(smk_net4addr_list.next,
1099 struct smk_net4addr, list);
1101 /* the comparison '>' is a bit hacky, but works */
1102 if (new->smk_masks > m->smk_masks) {
1103 list_add_rcu(&new->list, &smk_net4addr_list);
1107 list_for_each_entry_rcu(m, &smk_net4addr_list, list) {
1108 if (list_is_last(&m->list, &smk_net4addr_list)) {
1109 list_add_rcu(&new->list, &m->list);
1112 m_next = list_entry_rcu(m->list.next,
1113 struct smk_net4addr, list);
1114 if (new->smk_masks > m_next->smk_masks) {
1115 list_add_rcu(&new->list, &m->list);
1123 * smk_write_net4addr - write() for /smack/netlabel
1124 * @file: file pointer, not actually used
1125 * @buf: where to get the data from
1126 * @count: bytes sent
1127 * @ppos: where to start
1129 * Accepts only one net4addr per write call.
1130 * Returns number of bytes written or error code, as appropriate
1132 static ssize_t smk_write_net4addr(struct file *file, const char __user *buf,
1133 size_t count, loff_t *ppos)
1135 struct smk_net4addr *snp;
1136 struct sockaddr_in newname;
1138 struct smack_known *skp = NULL;
1140 char *host = (char *)&newname.sin_addr.s_addr;
1142 struct netlbl_audit audit_info;
1143 struct in_addr mask;
1147 u32 mask_bits = (1<<31);
1152 * Must have privilege.
1153 * No partial writes.
1154 * Enough data must be present.
1155 * "<addr/mask, as a.b.c.d/e><space><label>"
1156 * "<addr, as a.b.c.d><space><label>"
1158 if (!smack_privileged(CAP_MAC_ADMIN))
1162 if (count < SMK_NETLBLADDRMIN)
1165 data = memdup_user_nul(buf, count);
1167 return PTR_ERR(data);
1169 smack = kzalloc(count + 1, GFP_KERNEL);
1170 if (smack == NULL) {
1175 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd/%u %s",
1176 &host[0], &host[1], &host[2], &host[3], &masks, smack);
1178 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd %s",
1179 &host[0], &host[1], &host[2], &host[3], smack);
1187 if (masks > BEBITS) {
1193 * If smack begins with '-', it is an option, don't import it
1195 if (smack[0] != '-') {
1196 skp = smk_import_entry(smack, 0);
1203 * Only the -CIPSO option is supported for IPv4
1205 if (strcmp(smack, SMACK_CIPSO_OPTION) != 0) {
1211 for (m = masks, temp_mask = 0; m > 0; m--) {
1212 temp_mask |= mask_bits;
1215 mask.s_addr = cpu_to_be32(temp_mask);
1217 newname.sin_addr.s_addr &= mask.s_addr;
1219 * Only allow one writer at a time. Writes should be
1220 * quite rare and small in any case.
1222 mutex_lock(&smk_net4addr_lock);
1224 nsa = newname.sin_addr.s_addr;
1225 /* try to find if the prefix is already in the list */
1227 list_for_each_entry_rcu(snp, &smk_net4addr_list, list) {
1228 if (snp->smk_host.s_addr == nsa && snp->smk_masks == masks) {
1233 smk_netlabel_audit_set(&audit_info);
1236 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1241 snp->smk_host.s_addr = newname.sin_addr.s_addr;
1242 snp->smk_mask.s_addr = mask.s_addr;
1243 snp->smk_label = skp;
1244 snp->smk_masks = masks;
1245 smk_net4addr_insert(snp);
1249 * Delete the unlabeled entry, only if the previous label
1250 * wasn't the special CIPSO option
1252 if (snp->smk_label != NULL)
1253 rc = netlbl_cfg_unlbl_static_del(&init_net, NULL,
1254 &snp->smk_host, &snp->smk_mask,
1255 PF_INET, &audit_info);
1258 snp->smk_label = skp;
1262 * Now tell netlabel about the single label nature of
1263 * this host so that incoming packets get labeled.
1264 * but only if we didn't get the special CIPSO option
1266 if (rc == 0 && skp != NULL)
1267 rc = netlbl_cfg_unlbl_static_add(&init_net, NULL,
1268 &snp->smk_host, &snp->smk_mask, PF_INET,
1269 snp->smk_label->smk_secid, &audit_info);
1274 mutex_unlock(&smk_net4addr_lock);
1284 static const struct file_operations smk_net4addr_ops = {
1285 .open = smk_open_net4addr,
1287 .llseek = seq_lseek,
1288 .write = smk_write_net4addr,
1289 .release = seq_release,
1292 #if IS_ENABLED(CONFIG_IPV6)
1294 * Seq_file read operations for /smack/netlabel6
1297 static void *net6addr_seq_start(struct seq_file *s, loff_t *pos)
1299 return smk_seq_start(s, pos, &smk_net6addr_list);
1302 static void *net6addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1304 return smk_seq_next(s, v, pos, &smk_net6addr_list);
1308 * Print host/label pairs
1310 static int net6addr_seq_show(struct seq_file *s, void *v)
1312 struct list_head *list = v;
1313 struct smk_net6addr *skp =
1314 list_entry(list, struct smk_net6addr, list);
1316 if (skp->smk_label != NULL)
1317 seq_printf(s, "%pI6/%d %s\n", &skp->smk_host, skp->smk_masks,
1318 skp->smk_label->smk_known);
1323 static const struct seq_operations net6addr_seq_ops = {
1324 .start = net6addr_seq_start,
1325 .next = net6addr_seq_next,
1326 .show = net6addr_seq_show,
1327 .stop = smk_seq_stop,
1331 * smk_open_net6addr - open() for /smack/netlabel
1332 * @inode: inode structure representing file
1333 * @file: "netlabel" file pointer
1335 * Connect our net6addr_seq_* operations with /smack/netlabel
1338 static int smk_open_net6addr(struct inode *inode, struct file *file)
1340 return seq_open(file, &net6addr_seq_ops);
1344 * smk_net6addr_insert
1345 * @new : entry to insert
1347 * This inserts an entry in the smack_net6addrs list
1348 * sorted by netmask length (longest to smallest)
1349 * locked by &smk_net6addr_lock in smk_write_net6addr
1352 static void smk_net6addr_insert(struct smk_net6addr *new)
1354 struct smk_net6addr *m_next;
1355 struct smk_net6addr *m;
1357 if (list_empty(&smk_net6addr_list)) {
1358 list_add_rcu(&new->list, &smk_net6addr_list);
1362 m = list_entry_rcu(smk_net6addr_list.next,
1363 struct smk_net6addr, list);
1365 if (new->smk_masks > m->smk_masks) {
1366 list_add_rcu(&new->list, &smk_net6addr_list);
1370 list_for_each_entry_rcu(m, &smk_net6addr_list, list) {
1371 if (list_is_last(&m->list, &smk_net6addr_list)) {
1372 list_add_rcu(&new->list, &m->list);
1375 m_next = list_entry_rcu(m->list.next,
1376 struct smk_net6addr, list);
1377 if (new->smk_masks > m_next->smk_masks) {
1378 list_add_rcu(&new->list, &m->list);
1386 * smk_write_net6addr - write() for /smack/netlabel
1387 * @file: file pointer, not actually used
1388 * @buf: where to get the data from
1389 * @count: bytes sent
1390 * @ppos: where to start
1392 * Accepts only one net6addr per write call.
1393 * Returns number of bytes written or error code, as appropriate
1395 static ssize_t smk_write_net6addr(struct file *file, const char __user *buf,
1396 size_t count, loff_t *ppos)
1398 struct smk_net6addr *snp;
1399 struct in6_addr newname;
1400 struct in6_addr fullmask;
1401 struct smack_known *skp = NULL;
1407 unsigned int scanned[8];
1409 unsigned int mask = 128;
1412 * Must have privilege.
1413 * No partial writes.
1414 * Enough data must be present.
1415 * "<addr/mask, as a:b:c:d:e:f:g:h/e><space><label>"
1416 * "<addr, as a:b:c:d:e:f:g:h><space><label>"
1418 if (!smack_privileged(CAP_MAC_ADMIN))
1422 if (count < SMK_NETLBLADDRMIN)
1425 data = memdup_user_nul(buf, count);
1427 return PTR_ERR(data);
1429 smack = kzalloc(count + 1, GFP_KERNEL);
1430 if (smack == NULL) {
1435 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x/%u %s",
1436 &scanned[0], &scanned[1], &scanned[2], &scanned[3],
1437 &scanned[4], &scanned[5], &scanned[6], &scanned[7],
1440 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x %s",
1441 &scanned[0], &scanned[1], &scanned[2],
1442 &scanned[3], &scanned[4], &scanned[5],
1443 &scanned[6], &scanned[7], smack);
1453 for (i = 0; i < 8; i++) {
1454 if (scanned[i] > 0xffff) {
1458 newname.s6_addr16[i] = htons(scanned[i]);
1462 * If smack begins with '-', it is an option, don't import it
1464 if (smack[0] != '-') {
1465 skp = smk_import_entry(smack, 0);
1472 * Only -DELETE is supported for IPv6
1474 if (strcmp(smack, SMACK_DELETE_OPTION) != 0) {
1480 for (i = 0, m = mask; i < 8; i++) {
1482 fullmask.s6_addr16[i] = 0xffff;
1485 fullmask.s6_addr16[i] = (1 << m) - 1;
1488 fullmask.s6_addr16[i] = 0;
1489 newname.s6_addr16[i] &= fullmask.s6_addr16[i];
1493 * Only allow one writer at a time. Writes should be
1494 * quite rare and small in any case.
1496 mutex_lock(&smk_net6addr_lock);
1498 * Try to find the prefix in the list
1500 list_for_each_entry_rcu(snp, &smk_net6addr_list, list) {
1501 if (mask != snp->smk_masks)
1503 for (found = 1, i = 0; i < 8; i++) {
1504 if (newname.s6_addr16[i] !=
1505 snp->smk_host.s6_addr16[i]) {
1514 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1518 snp->smk_host = newname;
1519 snp->smk_mask = fullmask;
1520 snp->smk_masks = mask;
1521 snp->smk_label = skp;
1522 smk_net6addr_insert(snp);
1525 snp->smk_label = skp;
1531 mutex_unlock(&smk_net6addr_lock);
1541 static const struct file_operations smk_net6addr_ops = {
1542 .open = smk_open_net6addr,
1544 .llseek = seq_lseek,
1545 .write = smk_write_net6addr,
1546 .release = seq_release,
1548 #endif /* CONFIG_IPV6 */
1551 * smk_read_doi - read() for /smack/doi
1552 * @filp: file pointer, not actually used
1553 * @buf: where to put the result
1554 * @count: maximum to send along
1555 * @ppos: where to start
1557 * Returns number of bytes read or error code, as appropriate
1559 static ssize_t smk_read_doi(struct file *filp, char __user *buf,
1560 size_t count, loff_t *ppos)
1568 sprintf(temp, "%d", smk_cipso_doi_value);
1569 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1575 * smk_write_doi - write() for /smack/doi
1576 * @file: file pointer, not actually used
1577 * @buf: where to get the data from
1578 * @count: bytes sent
1579 * @ppos: where to start
1581 * Returns number of bytes written or error code, as appropriate
1583 static ssize_t smk_write_doi(struct file *file, const char __user *buf,
1584 size_t count, loff_t *ppos)
1589 if (!smack_privileged(CAP_MAC_ADMIN))
1592 if (count >= sizeof(temp) || count == 0)
1595 if (copy_from_user(temp, buf, count) != 0)
1600 if (sscanf(temp, "%d", &i) != 1)
1603 smk_cipso_doi_value = i;
1610 static const struct file_operations smk_doi_ops = {
1611 .read = smk_read_doi,
1612 .write = smk_write_doi,
1613 .llseek = default_llseek,
1617 * smk_read_direct - read() for /smack/direct
1618 * @filp: file pointer, not actually used
1619 * @buf: where to put the result
1620 * @count: maximum to send along
1621 * @ppos: where to start
1623 * Returns number of bytes read or error code, as appropriate
1625 static ssize_t smk_read_direct(struct file *filp, char __user *buf,
1626 size_t count, loff_t *ppos)
1634 sprintf(temp, "%d", smack_cipso_direct);
1635 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1641 * smk_write_direct - write() for /smack/direct
1642 * @file: file pointer, not actually used
1643 * @buf: where to get the data from
1644 * @count: bytes sent
1645 * @ppos: where to start
1647 * Returns number of bytes written or error code, as appropriate
1649 static ssize_t smk_write_direct(struct file *file, const char __user *buf,
1650 size_t count, loff_t *ppos)
1652 struct smack_known *skp;
1656 if (!smack_privileged(CAP_MAC_ADMIN))
1659 if (count >= sizeof(temp) || count == 0)
1662 if (copy_from_user(temp, buf, count) != 0)
1667 if (sscanf(temp, "%d", &i) != 1)
1671 * Don't do anything if the value hasn't actually changed.
1672 * If it is changing reset the level on entries that were
1673 * set up to be direct when they were created.
1675 if (smack_cipso_direct != i) {
1676 mutex_lock(&smack_known_lock);
1677 list_for_each_entry_rcu(skp, &smack_known_list, list)
1678 if (skp->smk_netlabel.attr.mls.lvl ==
1680 skp->smk_netlabel.attr.mls.lvl = i;
1681 smack_cipso_direct = i;
1682 mutex_unlock(&smack_known_lock);
1688 static const struct file_operations smk_direct_ops = {
1689 .read = smk_read_direct,
1690 .write = smk_write_direct,
1691 .llseek = default_llseek,
1695 * smk_read_mapped - read() for /smack/mapped
1696 * @filp: file pointer, not actually used
1697 * @buf: where to put the result
1698 * @count: maximum to send along
1699 * @ppos: where to start
1701 * Returns number of bytes read or error code, as appropriate
1703 static ssize_t smk_read_mapped(struct file *filp, char __user *buf,
1704 size_t count, loff_t *ppos)
1712 sprintf(temp, "%d", smack_cipso_mapped);
1713 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1719 * smk_write_mapped - write() for /smack/mapped
1720 * @file: file pointer, not actually used
1721 * @buf: where to get the data from
1722 * @count: bytes sent
1723 * @ppos: where to start
1725 * Returns number of bytes written or error code, as appropriate
1727 static ssize_t smk_write_mapped(struct file *file, const char __user *buf,
1728 size_t count, loff_t *ppos)
1730 struct smack_known *skp;
1734 if (!smack_privileged(CAP_MAC_ADMIN))
1737 if (count >= sizeof(temp) || count == 0)
1740 if (copy_from_user(temp, buf, count) != 0)
1745 if (sscanf(temp, "%d", &i) != 1)
1749 * Don't do anything if the value hasn't actually changed.
1750 * If it is changing reset the level on entries that were
1751 * set up to be mapped when they were created.
1753 if (smack_cipso_mapped != i) {
1754 mutex_lock(&smack_known_lock);
1755 list_for_each_entry_rcu(skp, &smack_known_list, list)
1756 if (skp->smk_netlabel.attr.mls.lvl ==
1758 skp->smk_netlabel.attr.mls.lvl = i;
1759 smack_cipso_mapped = i;
1760 mutex_unlock(&smack_known_lock);
1766 static const struct file_operations smk_mapped_ops = {
1767 .read = smk_read_mapped,
1768 .write = smk_write_mapped,
1769 .llseek = default_llseek,
1773 * smk_read_ambient - read() for /smack/ambient
1774 * @filp: file pointer, not actually used
1775 * @buf: where to put the result
1776 * @cn: maximum to send along
1777 * @ppos: where to start
1779 * Returns number of bytes read or error code, as appropriate
1781 static ssize_t smk_read_ambient(struct file *filp, char __user *buf,
1782 size_t cn, loff_t *ppos)
1790 * Being careful to avoid a problem in the case where
1791 * smack_net_ambient gets changed in midstream.
1793 mutex_lock(&smack_ambient_lock);
1795 asize = strlen(smack_net_ambient->smk_known) + 1;
1798 rc = simple_read_from_buffer(buf, cn, ppos,
1799 smack_net_ambient->smk_known,
1804 mutex_unlock(&smack_ambient_lock);
1810 * smk_write_ambient - write() for /smack/ambient
1811 * @file: file pointer, not actually used
1812 * @buf: where to get the data from
1813 * @count: bytes sent
1814 * @ppos: where to start
1816 * Returns number of bytes written or error code, as appropriate
1818 static ssize_t smk_write_ambient(struct file *file, const char __user *buf,
1819 size_t count, loff_t *ppos)
1821 struct smack_known *skp;
1826 if (!smack_privileged(CAP_MAC_ADMIN))
1829 data = memdup_user_nul(buf, count);
1831 return PTR_ERR(data);
1833 skp = smk_import_entry(data, count);
1839 mutex_lock(&smack_ambient_lock);
1841 oldambient = smack_net_ambient->smk_known;
1842 smack_net_ambient = skp;
1843 smk_unlbl_ambient(oldambient);
1845 mutex_unlock(&smack_ambient_lock);
1852 static const struct file_operations smk_ambient_ops = {
1853 .read = smk_read_ambient,
1854 .write = smk_write_ambient,
1855 .llseek = default_llseek,
1859 * Seq_file operations for /smack/onlycap
1861 static void *onlycap_seq_start(struct seq_file *s, loff_t *pos)
1863 return smk_seq_start(s, pos, &smack_onlycap_list);
1866 static void *onlycap_seq_next(struct seq_file *s, void *v, loff_t *pos)
1868 return smk_seq_next(s, v, pos, &smack_onlycap_list);
1871 static int onlycap_seq_show(struct seq_file *s, void *v)
1873 struct list_head *list = v;
1874 struct smack_known_list_elem *sklep =
1875 list_entry_rcu(list, struct smack_known_list_elem, list);
1877 seq_puts(s, sklep->smk_label->smk_known);
1883 static const struct seq_operations onlycap_seq_ops = {
1884 .start = onlycap_seq_start,
1885 .next = onlycap_seq_next,
1886 .show = onlycap_seq_show,
1887 .stop = smk_seq_stop,
1890 static int smk_open_onlycap(struct inode *inode, struct file *file)
1892 return seq_open(file, &onlycap_seq_ops);
1896 * smk_list_swap_rcu - swap public list with a private one in RCU-safe way
1897 * The caller must hold appropriate mutex to prevent concurrent modifications
1898 * to the public list.
1899 * Private list is assumed to be not accessible to other threads yet.
1901 * @public: public list
1902 * @private: private list
1904 static void smk_list_swap_rcu(struct list_head *public,
1905 struct list_head *private)
1907 struct list_head *first, *last;
1909 if (list_empty(public)) {
1910 list_splice_init_rcu(private, public, synchronize_rcu);
1912 /* Remember public list before replacing it */
1913 first = public->next;
1914 last = public->prev;
1916 /* Publish private list in place of public in RCU-safe way */
1917 private->prev->next = public;
1918 private->next->prev = public;
1919 rcu_assign_pointer(public->next, private->next);
1920 public->prev = private->prev;
1924 /* When all readers are done with the old public list,
1925 * attach it in place of private */
1926 private->next = first;
1927 private->prev = last;
1928 first->prev = private;
1929 last->next = private;
1934 * smk_parse_label_list - parse list of Smack labels, separated by spaces
1936 * @data: the string to parse
1937 * @private: destination list
1939 * Returns zero on success or error code, as appropriate
1941 static int smk_parse_label_list(char *data, struct list_head *list)
1944 struct smack_known *skp;
1945 struct smack_known_list_elem *sklep;
1947 while ((tok = strsep(&data, " ")) != NULL) {
1951 skp = smk_import_entry(tok, 0);
1953 return PTR_ERR(skp);
1955 sklep = kzalloc(sizeof(*sklep), GFP_KERNEL);
1959 sklep->smk_label = skp;
1960 list_add(&sklep->list, list);
1967 * smk_destroy_label_list - destroy a list of smack_known_list_elem
1968 * @head: header pointer of the list to destroy
1970 void smk_destroy_label_list(struct list_head *list)
1972 struct smack_known_list_elem *sklep;
1973 struct smack_known_list_elem *sklep2;
1975 list_for_each_entry_safe(sklep, sklep2, list, list)
1978 INIT_LIST_HEAD(list);
1982 * smk_write_onlycap - write() for smackfs/onlycap
1983 * @file: file pointer, not actually used
1984 * @buf: where to get the data from
1985 * @count: bytes sent
1986 * @ppos: where to start
1988 * Returns number of bytes written or error code, as appropriate
1990 static ssize_t smk_write_onlycap(struct file *file, const char __user *buf,
1991 size_t count, loff_t *ppos)
1994 LIST_HEAD(list_tmp);
1997 if (!smack_privileged(CAP_MAC_ADMIN))
2000 data = memdup_user_nul(buf, count);
2002 return PTR_ERR(data);
2004 rc = smk_parse_label_list(data, &list_tmp);
2008 * Clear the smack_onlycap on invalid label errors. This means
2009 * that we can pass a null string to unset the onlycap value.
2011 * Importing will also reject a label beginning with '-',
2012 * so "-usecapabilities" will also work.
2014 * But do so only on invalid label, not on system errors.
2015 * The invalid label must be first to count as clearing attempt.
2017 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2018 mutex_lock(&smack_onlycap_lock);
2019 smk_list_swap_rcu(&smack_onlycap_list, &list_tmp);
2020 mutex_unlock(&smack_onlycap_lock);
2024 smk_destroy_label_list(&list_tmp);
2029 static const struct file_operations smk_onlycap_ops = {
2030 .open = smk_open_onlycap,
2032 .write = smk_write_onlycap,
2033 .llseek = seq_lseek,
2034 .release = seq_release,
2037 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2039 * smk_read_unconfined - read() for smackfs/unconfined
2040 * @filp: file pointer, not actually used
2041 * @buf: where to put the result
2042 * @cn: maximum to send along
2043 * @ppos: where to start
2045 * Returns number of bytes read or error code, as appropriate
2047 static ssize_t smk_read_unconfined(struct file *filp, char __user *buf,
2048 size_t cn, loff_t *ppos)
2051 ssize_t rc = -EINVAL;
2057 if (smack_unconfined != NULL)
2058 smack = smack_unconfined->smk_known;
2060 asize = strlen(smack) + 1;
2063 rc = simple_read_from_buffer(buf, cn, ppos, smack, asize);
2069 * smk_write_unconfined - write() for smackfs/unconfined
2070 * @file: file pointer, not actually used
2071 * @buf: where to get the data from
2072 * @count: bytes sent
2073 * @ppos: where to start
2075 * Returns number of bytes written or error code, as appropriate
2077 static ssize_t smk_write_unconfined(struct file *file, const char __user *buf,
2078 size_t count, loff_t *ppos)
2081 struct smack_known *skp;
2084 if (!smack_privileged(CAP_MAC_ADMIN))
2087 data = memdup_user_nul(buf, count);
2089 return PTR_ERR(data);
2092 * Clear the smack_unconfined on invalid label errors. This means
2093 * that we can pass a null string to unset the unconfined value.
2095 * Importing will also reject a label beginning with '-',
2096 * so "-confine" will also work.
2098 * But do so only on invalid label, not on system errors.
2100 skp = smk_import_entry(data, count);
2101 if (PTR_ERR(skp) == -EINVAL)
2103 else if (IS_ERR(skp)) {
2108 smack_unconfined = skp;
2115 static const struct file_operations smk_unconfined_ops = {
2116 .read = smk_read_unconfined,
2117 .write = smk_write_unconfined,
2118 .llseek = default_llseek,
2120 #endif /* CONFIG_SECURITY_SMACK_BRINGUP */
2123 * smk_read_logging - read() for /smack/logging
2124 * @filp: file pointer, not actually used
2125 * @buf: where to put the result
2126 * @cn: maximum to send along
2127 * @ppos: where to start
2129 * Returns number of bytes read or error code, as appropriate
2131 static ssize_t smk_read_logging(struct file *filp, char __user *buf,
2132 size_t count, loff_t *ppos)
2140 sprintf(temp, "%d\n", log_policy);
2141 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2146 * smk_write_logging - write() for /smack/logging
2147 * @file: file pointer, not actually used
2148 * @buf: where to get the data from
2149 * @count: bytes sent
2150 * @ppos: where to start
2152 * Returns number of bytes written or error code, as appropriate
2154 static ssize_t smk_write_logging(struct file *file, const char __user *buf,
2155 size_t count, loff_t *ppos)
2160 if (!smack_privileged(CAP_MAC_ADMIN))
2163 if (count >= sizeof(temp) || count == 0)
2166 if (copy_from_user(temp, buf, count) != 0)
2171 if (sscanf(temp, "%d", &i) != 1)
2181 static const struct file_operations smk_logging_ops = {
2182 .read = smk_read_logging,
2183 .write = smk_write_logging,
2184 .llseek = default_llseek,
2188 * Seq_file read operations for /smack/load-self
2191 static void *load_self_seq_start(struct seq_file *s, loff_t *pos)
2193 struct task_smack *tsp = smack_cred(current_cred());
2195 return smk_seq_start(s, pos, &tsp->smk_rules);
2198 static void *load_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2200 struct task_smack *tsp = smack_cred(current_cred());
2202 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2205 static int load_self_seq_show(struct seq_file *s, void *v)
2207 struct list_head *list = v;
2208 struct smack_rule *srp =
2209 list_entry_rcu(list, struct smack_rule, list);
2211 smk_rule_show(s, srp, SMK_LABELLEN);
2216 static const struct seq_operations load_self_seq_ops = {
2217 .start = load_self_seq_start,
2218 .next = load_self_seq_next,
2219 .show = load_self_seq_show,
2220 .stop = smk_seq_stop,
2225 * smk_open_load_self - open() for /smack/load-self2
2226 * @inode: inode structure representing file
2227 * @file: "load" file pointer
2229 * For reading, use load_seq_* seq_file reading operations.
2231 static int smk_open_load_self(struct inode *inode, struct file *file)
2233 return seq_open(file, &load_self_seq_ops);
2237 * smk_write_load_self - write() for /smack/load-self
2238 * @file: file pointer, not actually used
2239 * @buf: where to get the data from
2240 * @count: bytes sent
2241 * @ppos: where to start - must be 0
2244 static ssize_t smk_write_load_self(struct file *file, const char __user *buf,
2245 size_t count, loff_t *ppos)
2247 struct task_smack *tsp = smack_cred(current_cred());
2249 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2250 &tsp->smk_rules_lock, SMK_FIXED24_FMT);
2253 static const struct file_operations smk_load_self_ops = {
2254 .open = smk_open_load_self,
2256 .llseek = seq_lseek,
2257 .write = smk_write_load_self,
2258 .release = seq_release,
2262 * smk_user_access - handle access check transaction
2263 * @file: file pointer
2264 * @buf: data from user space
2265 * @count: bytes sent
2266 * @ppos: where to start - must be 0
2268 static ssize_t smk_user_access(struct file *file, const char __user *buf,
2269 size_t count, loff_t *ppos, int format)
2271 struct smack_parsed_rule rule;
2275 data = simple_transaction_get(file, buf, count);
2277 return PTR_ERR(data);
2279 if (format == SMK_FIXED24_FMT) {
2280 if (count < SMK_LOADLEN)
2282 res = smk_parse_rule(data, &rule, 0);
2285 * simple_transaction_get() returns null-terminated data
2287 res = smk_parse_long_rule(data, &rule, 0, 3);
2291 res = smk_access(rule.smk_subject, rule.smk_object,
2292 rule.smk_access1, NULL);
2293 else if (res != -ENOENT)
2297 * smk_access() can return a value > 0 in the "bringup" case.
2299 data[0] = res >= 0 ? '1' : '0';
2302 simple_transaction_set(file, 2);
2304 if (format == SMK_FIXED24_FMT)
2310 * smk_write_access - handle access check transaction
2311 * @file: file pointer
2312 * @buf: data from user space
2313 * @count: bytes sent
2314 * @ppos: where to start - must be 0
2316 static ssize_t smk_write_access(struct file *file, const char __user *buf,
2317 size_t count, loff_t *ppos)
2319 return smk_user_access(file, buf, count, ppos, SMK_FIXED24_FMT);
2322 static const struct file_operations smk_access_ops = {
2323 .write = smk_write_access,
2324 .read = simple_transaction_read,
2325 .release = simple_transaction_release,
2326 .llseek = generic_file_llseek,
2331 * Seq_file read operations for /smack/load2
2334 static int load2_seq_show(struct seq_file *s, void *v)
2336 struct list_head *list = v;
2337 struct smack_rule *srp;
2338 struct smack_known *skp =
2339 list_entry_rcu(list, struct smack_known, list);
2341 list_for_each_entry_rcu(srp, &skp->smk_rules, list)
2342 smk_rule_show(s, srp, SMK_LONGLABEL);
2347 static const struct seq_operations load2_seq_ops = {
2348 .start = load2_seq_start,
2349 .next = load2_seq_next,
2350 .show = load2_seq_show,
2351 .stop = smk_seq_stop,
2355 * smk_open_load2 - open() for /smack/load2
2356 * @inode: inode structure representing file
2357 * @file: "load2" file pointer
2359 * For reading, use load2_seq_* seq_file reading operations.
2361 static int smk_open_load2(struct inode *inode, struct file *file)
2363 return seq_open(file, &load2_seq_ops);
2367 * smk_write_load2 - write() for /smack/load2
2368 * @file: file pointer, not actually used
2369 * @buf: where to get the data from
2370 * @count: bytes sent
2371 * @ppos: where to start - must be 0
2374 static ssize_t smk_write_load2(struct file *file, const char __user *buf,
2375 size_t count, loff_t *ppos)
2378 * Must have privilege.
2380 if (!smack_privileged(CAP_MAC_ADMIN))
2383 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2387 static const struct file_operations smk_load2_ops = {
2388 .open = smk_open_load2,
2390 .llseek = seq_lseek,
2391 .write = smk_write_load2,
2392 .release = seq_release,
2396 * Seq_file read operations for /smack/load-self2
2399 static void *load_self2_seq_start(struct seq_file *s, loff_t *pos)
2401 struct task_smack *tsp = smack_cred(current_cred());
2403 return smk_seq_start(s, pos, &tsp->smk_rules);
2406 static void *load_self2_seq_next(struct seq_file *s, void *v, loff_t *pos)
2408 struct task_smack *tsp = smack_cred(current_cred());
2410 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2413 static int load_self2_seq_show(struct seq_file *s, void *v)
2415 struct list_head *list = v;
2416 struct smack_rule *srp =
2417 list_entry_rcu(list, struct smack_rule, list);
2419 smk_rule_show(s, srp, SMK_LONGLABEL);
2424 static const struct seq_operations load_self2_seq_ops = {
2425 .start = load_self2_seq_start,
2426 .next = load_self2_seq_next,
2427 .show = load_self2_seq_show,
2428 .stop = smk_seq_stop,
2432 * smk_open_load_self2 - open() for /smack/load-self2
2433 * @inode: inode structure representing file
2434 * @file: "load" file pointer
2436 * For reading, use load_seq_* seq_file reading operations.
2438 static int smk_open_load_self2(struct inode *inode, struct file *file)
2440 return seq_open(file, &load_self2_seq_ops);
2444 * smk_write_load_self2 - write() for /smack/load-self2
2445 * @file: file pointer, not actually used
2446 * @buf: where to get the data from
2447 * @count: bytes sent
2448 * @ppos: where to start - must be 0
2451 static ssize_t smk_write_load_self2(struct file *file, const char __user *buf,
2452 size_t count, loff_t *ppos)
2454 struct task_smack *tsp = smack_cred(current_cred());
2456 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2457 &tsp->smk_rules_lock, SMK_LONG_FMT);
2460 static const struct file_operations smk_load_self2_ops = {
2461 .open = smk_open_load_self2,
2463 .llseek = seq_lseek,
2464 .write = smk_write_load_self2,
2465 .release = seq_release,
2469 * smk_write_access2 - handle access check transaction
2470 * @file: file pointer
2471 * @buf: data from user space
2472 * @count: bytes sent
2473 * @ppos: where to start - must be 0
2475 static ssize_t smk_write_access2(struct file *file, const char __user *buf,
2476 size_t count, loff_t *ppos)
2478 return smk_user_access(file, buf, count, ppos, SMK_LONG_FMT);
2481 static const struct file_operations smk_access2_ops = {
2482 .write = smk_write_access2,
2483 .read = simple_transaction_read,
2484 .release = simple_transaction_release,
2485 .llseek = generic_file_llseek,
2489 * smk_write_revoke_subj - write() for /smack/revoke-subject
2490 * @file: file pointer
2491 * @buf: data from user space
2492 * @count: bytes sent
2493 * @ppos: where to start - must be 0
2495 static ssize_t smk_write_revoke_subj(struct file *file, const char __user *buf,
2496 size_t count, loff_t *ppos)
2500 struct smack_known *skp;
2501 struct smack_rule *sp;
2502 struct list_head *rule_list;
2503 struct mutex *rule_lock;
2509 if (!smack_privileged(CAP_MAC_ADMIN))
2512 if (count == 0 || count > SMK_LONGLABEL)
2515 data = memdup_user(buf, count);
2517 return PTR_ERR(data);
2519 cp = smk_parse_smack(data, count);
2525 skp = smk_find_entry(cp);
2529 rule_list = &skp->smk_rules;
2530 rule_lock = &skp->smk_rules_lock;
2532 mutex_lock(rule_lock);
2534 list_for_each_entry_rcu(sp, rule_list, list)
2537 mutex_unlock(rule_lock);
2547 static const struct file_operations smk_revoke_subj_ops = {
2548 .write = smk_write_revoke_subj,
2549 .read = simple_transaction_read,
2550 .release = simple_transaction_release,
2551 .llseek = generic_file_llseek,
2555 * smk_init_sysfs - initialize /sys/fs/smackfs
2558 static int smk_init_sysfs(void)
2560 return sysfs_create_mount_point(fs_kobj, "smackfs");
2564 * smk_write_change_rule - write() for /smack/change-rule
2565 * @file: file pointer
2566 * @buf: data from user space
2567 * @count: bytes sent
2568 * @ppos: where to start - must be 0
2570 static ssize_t smk_write_change_rule(struct file *file, const char __user *buf,
2571 size_t count, loff_t *ppos)
2574 * Must have privilege.
2576 if (!smack_privileged(CAP_MAC_ADMIN))
2579 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2583 static const struct file_operations smk_change_rule_ops = {
2584 .write = smk_write_change_rule,
2585 .read = simple_transaction_read,
2586 .release = simple_transaction_release,
2587 .llseek = generic_file_llseek,
2591 * smk_read_syslog - read() for smackfs/syslog
2592 * @filp: file pointer, not actually used
2593 * @buf: where to put the result
2594 * @cn: maximum to send along
2595 * @ppos: where to start
2597 * Returns number of bytes read or error code, as appropriate
2599 static ssize_t smk_read_syslog(struct file *filp, char __user *buf,
2600 size_t cn, loff_t *ppos)
2602 struct smack_known *skp;
2603 ssize_t rc = -EINVAL;
2609 if (smack_syslog_label == NULL)
2610 skp = &smack_known_star;
2612 skp = smack_syslog_label;
2614 asize = strlen(skp->smk_known) + 1;
2617 rc = simple_read_from_buffer(buf, cn, ppos, skp->smk_known,
2624 * smk_write_syslog - write() for smackfs/syslog
2625 * @file: file pointer, not actually used
2626 * @buf: where to get the data from
2627 * @count: bytes sent
2628 * @ppos: where to start
2630 * Returns number of bytes written or error code, as appropriate
2632 static ssize_t smk_write_syslog(struct file *file, const char __user *buf,
2633 size_t count, loff_t *ppos)
2636 struct smack_known *skp;
2639 if (!smack_privileged(CAP_MAC_ADMIN))
2642 data = memdup_user_nul(buf, count);
2644 return PTR_ERR(data);
2646 skp = smk_import_entry(data, count);
2650 smack_syslog_label = skp;
2656 static const struct file_operations smk_syslog_ops = {
2657 .read = smk_read_syslog,
2658 .write = smk_write_syslog,
2659 .llseek = default_llseek,
2663 * Seq_file read operations for /smack/relabel-self
2666 static void *relabel_self_seq_start(struct seq_file *s, loff_t *pos)
2668 struct task_smack *tsp = smack_cred(current_cred());
2670 return smk_seq_start(s, pos, &tsp->smk_relabel);
2673 static void *relabel_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2675 struct task_smack *tsp = smack_cred(current_cred());
2677 return smk_seq_next(s, v, pos, &tsp->smk_relabel);
2680 static int relabel_self_seq_show(struct seq_file *s, void *v)
2682 struct list_head *list = v;
2683 struct smack_known_list_elem *sklep =
2684 list_entry(list, struct smack_known_list_elem, list);
2686 seq_puts(s, sklep->smk_label->smk_known);
2692 static const struct seq_operations relabel_self_seq_ops = {
2693 .start = relabel_self_seq_start,
2694 .next = relabel_self_seq_next,
2695 .show = relabel_self_seq_show,
2696 .stop = smk_seq_stop,
2700 * smk_open_relabel_self - open() for /smack/relabel-self
2701 * @inode: inode structure representing file
2702 * @file: "relabel-self" file pointer
2704 * Connect our relabel_self_seq_* operations with /smack/relabel-self
2707 static int smk_open_relabel_self(struct inode *inode, struct file *file)
2709 return seq_open(file, &relabel_self_seq_ops);
2713 * smk_write_relabel_self - write() for /smack/relabel-self
2714 * @file: file pointer, not actually used
2715 * @buf: where to get the data from
2716 * @count: bytes sent
2717 * @ppos: where to start - must be 0
2720 static ssize_t smk_write_relabel_self(struct file *file, const char __user *buf,
2721 size_t count, loff_t *ppos)
2723 struct task_smack *tsp = smack_cred(current_cred());
2726 LIST_HEAD(list_tmp);
2729 * Must have privilege.
2731 if (!smack_privileged(CAP_MAC_ADMIN))
2735 * Enough data must be present.
2740 data = memdup_user_nul(buf, count);
2742 return PTR_ERR(data);
2744 rc = smk_parse_label_list(data, &list_tmp);
2747 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2748 smk_destroy_label_list(&tsp->smk_relabel);
2749 list_splice(&list_tmp, &tsp->smk_relabel);
2753 smk_destroy_label_list(&list_tmp);
2757 static const struct file_operations smk_relabel_self_ops = {
2758 .open = smk_open_relabel_self,
2760 .llseek = seq_lseek,
2761 .write = smk_write_relabel_self,
2762 .release = seq_release,
2766 * smk_read_ptrace - read() for /smack/ptrace
2767 * @filp: file pointer, not actually used
2768 * @buf: where to put the result
2769 * @count: maximum to send along
2770 * @ppos: where to start
2772 * Returns number of bytes read or error code, as appropriate
2774 static ssize_t smk_read_ptrace(struct file *filp, char __user *buf,
2775 size_t count, loff_t *ppos)
2783 sprintf(temp, "%d\n", smack_ptrace_rule);
2784 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2789 * smk_write_ptrace - write() for /smack/ptrace
2790 * @file: file pointer
2791 * @buf: data from user space
2792 * @count: bytes sent
2793 * @ppos: where to start - must be 0
2795 static ssize_t smk_write_ptrace(struct file *file, const char __user *buf,
2796 size_t count, loff_t *ppos)
2801 if (!smack_privileged(CAP_MAC_ADMIN))
2804 if (*ppos != 0 || count >= sizeof(temp) || count == 0)
2807 if (copy_from_user(temp, buf, count) != 0)
2812 if (sscanf(temp, "%d", &i) != 1)
2814 if (i < SMACK_PTRACE_DEFAULT || i > SMACK_PTRACE_MAX)
2816 smack_ptrace_rule = i;
2821 static const struct file_operations smk_ptrace_ops = {
2822 .write = smk_write_ptrace,
2823 .read = smk_read_ptrace,
2824 .llseek = default_llseek,
2828 * smk_fill_super - fill the smackfs superblock
2829 * @sb: the empty superblock
2832 * Fill in the well known entries for the smack filesystem
2834 * Returns 0 on success, an error code on failure
2836 static int smk_fill_super(struct super_block *sb, struct fs_context *fc)
2840 static const struct tree_descr smack_files[] = {
2842 "load", &smk_load_ops, S_IRUGO|S_IWUSR},
2844 "cipso", &smk_cipso_ops, S_IRUGO|S_IWUSR},
2846 "doi", &smk_doi_ops, S_IRUGO|S_IWUSR},
2848 "direct", &smk_direct_ops, S_IRUGO|S_IWUSR},
2850 "ambient", &smk_ambient_ops, S_IRUGO|S_IWUSR},
2852 "netlabel", &smk_net4addr_ops, S_IRUGO|S_IWUSR},
2854 "onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR},
2856 "logging", &smk_logging_ops, S_IRUGO|S_IWUSR},
2858 "load-self", &smk_load_self_ops, S_IRUGO|S_IWUGO},
2860 "access", &smk_access_ops, S_IRUGO|S_IWUGO},
2862 "mapped", &smk_mapped_ops, S_IRUGO|S_IWUSR},
2864 "load2", &smk_load2_ops, S_IRUGO|S_IWUSR},
2865 [SMK_LOAD_SELF2] = {
2866 "load-self2", &smk_load_self2_ops, S_IRUGO|S_IWUGO},
2868 "access2", &smk_access2_ops, S_IRUGO|S_IWUGO},
2870 "cipso2", &smk_cipso2_ops, S_IRUGO|S_IWUSR},
2871 [SMK_REVOKE_SUBJ] = {
2872 "revoke-subject", &smk_revoke_subj_ops,
2874 [SMK_CHANGE_RULE] = {
2875 "change-rule", &smk_change_rule_ops, S_IRUGO|S_IWUSR},
2877 "syslog", &smk_syslog_ops, S_IRUGO|S_IWUSR},
2879 "ptrace", &smk_ptrace_ops, S_IRUGO|S_IWUSR},
2880 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2881 [SMK_UNCONFINED] = {
2882 "unconfined", &smk_unconfined_ops, S_IRUGO|S_IWUSR},
2884 #if IS_ENABLED(CONFIG_IPV6)
2886 "ipv6host", &smk_net6addr_ops, S_IRUGO|S_IWUSR},
2887 #endif /* CONFIG_IPV6 */
2888 [SMK_RELABEL_SELF] = {
2889 "relabel-self", &smk_relabel_self_ops,
2895 rc = simple_fill_super(sb, SMACK_MAGIC, smack_files);
2897 printk(KERN_ERR "%s failed %d while creating inodes\n",
2906 * smk_get_tree - get the smackfs superblock
2907 * @fc: The mount context, including any options
2909 * Just passes everything along.
2911 * Returns what the lower level code does.
2913 static int smk_get_tree(struct fs_context *fc)
2915 return get_tree_single(fc, smk_fill_super);
2918 static const struct fs_context_operations smk_context_ops = {
2919 .get_tree = smk_get_tree,
2923 * smk_init_fs_context - Initialise a filesystem context for smackfs
2924 * @fc: The blank mount context
2926 static int smk_init_fs_context(struct fs_context *fc)
2928 fc->ops = &smk_context_ops;
2932 static struct file_system_type smk_fs_type = {
2934 .init_fs_context = smk_init_fs_context,
2935 .kill_sb = kill_litter_super,
2938 static struct vfsmount *smackfs_mount;
2940 static int __init smk_preset_netlabel(struct smack_known *skp)
2942 skp->smk_netlabel.domain = skp->smk_known;
2943 skp->smk_netlabel.flags =
2944 NETLBL_SECATTR_DOMAIN | NETLBL_SECATTR_MLS_LVL;
2945 return smk_netlbl_mls(smack_cipso_direct, skp->smk_known,
2946 &skp->smk_netlabel, strlen(skp->smk_known));
2950 * init_smk_fs - get the smackfs superblock
2952 * register the smackfs
2954 * Do not register smackfs if Smack wasn't enabled
2955 * on boot. We can not put this method normally under the
2956 * smack_init() code path since the security subsystem get
2957 * initialized before the vfs caches.
2959 * Returns true if we were not chosen on boot or if
2960 * we were chosen and filesystem registration succeeded.
2962 static int __init init_smk_fs(void)
2967 if (smack_enabled == 0)
2970 err = smk_init_sysfs();
2972 printk(KERN_ERR "smackfs: sysfs mountpoint problem.\n");
2974 err = register_filesystem(&smk_fs_type);
2976 smackfs_mount = kern_mount(&smk_fs_type);
2977 if (IS_ERR(smackfs_mount)) {
2978 printk(KERN_ERR "smackfs: could not mount!\n");
2979 err = PTR_ERR(smackfs_mount);
2980 smackfs_mount = NULL;
2985 smk_unlbl_ambient(NULL);
2987 rc = smk_preset_netlabel(&smack_known_floor);
2988 if (err == 0 && rc < 0)
2990 rc = smk_preset_netlabel(&smack_known_hat);
2991 if (err == 0 && rc < 0)
2993 rc = smk_preset_netlabel(&smack_known_huh);
2994 if (err == 0 && rc < 0)
2996 rc = smk_preset_netlabel(&smack_known_star);
2997 if (err == 0 && rc < 0)
2999 rc = smk_preset_netlabel(&smack_known_web);
3000 if (err == 0 && rc < 0)
3006 __initcall(init_smk_fs);