2 * Simplified MAC Kernel (smack) security module
4 * This file contains the smack hook function implementations.
7 * Casey Schaufler <casey@schaufler-ca.com>
8 * Jarkko Sakkinen <jarkko.sakkinen@intel.com>
10 * Copyright (C) 2007 Casey Schaufler <casey@schaufler-ca.com>
11 * Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
12 * Paul Moore <paul@paul-moore.com>
13 * Copyright (C) 2010 Nokia Corporation
14 * Copyright (C) 2011 Intel Corporation.
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License version 2,
18 * as published by the Free Software Foundation.
21 #include <linux/xattr.h>
22 #include <linux/pagemap.h>
23 #include <linux/mount.h>
24 #include <linux/stat.h>
26 #include <asm/ioctls.h>
28 #include <linux/tcp.h>
29 #include <linux/udp.h>
30 #include <linux/dccp.h>
31 #include <linux/slab.h>
32 #include <linux/mutex.h>
33 #include <linux/pipe_fs_i.h>
34 #include <net/cipso_ipv4.h>
37 #include <linux/audit.h>
38 #include <linux/magic.h>
39 #include <linux/dcache.h>
40 #include <linux/personality.h>
41 #include <linux/msg.h>
42 #include <linux/shm.h>
43 #include <linux/binfmts.h>
46 #define task_security(task) (task_cred_xxx((task), security))
48 #define TRANS_TRUE "TRUE"
49 #define TRANS_TRUE_SIZE 4
51 #define SMK_CONNECTING 0
52 #define SMK_RECEIVING 1
55 LIST_HEAD(smk_ipv6_port_list
);
58 * smk_fetch - Fetch the smack label from a file.
59 * @ip: a pointer to the inode
60 * @dp: a pointer to the dentry
62 * Returns a pointer to the master list entry for the Smack label
63 * or NULL if there was no label to fetch.
65 static struct smack_known
*smk_fetch(const char *name
, struct inode
*ip
,
70 struct smack_known
*skp
= NULL
;
72 if (ip
->i_op
->getxattr
== NULL
)
75 buffer
= kzalloc(SMK_LONGLABEL
, GFP_KERNEL
);
79 rc
= ip
->i_op
->getxattr(dp
, name
, buffer
, SMK_LONGLABEL
);
81 skp
= smk_import_entry(buffer
, rc
);
89 * new_inode_smack - allocate an inode security blob
90 * @smack: a pointer to the Smack label to use in the blob
92 * Returns the new blob or NULL if there's no memory available
94 struct inode_smack
*new_inode_smack(char *smack
)
96 struct inode_smack
*isp
;
98 isp
= kzalloc(sizeof(struct inode_smack
), GFP_NOFS
);
102 isp
->smk_inode
= smack
;
104 mutex_init(&isp
->smk_lock
);
110 * new_task_smack - allocate a task security blob
111 * @smack: a pointer to the Smack label to use in the blob
113 * Returns the new blob or NULL if there's no memory available
115 static struct task_smack
*new_task_smack(struct smack_known
*task
,
116 struct smack_known
*forked
, gfp_t gfp
)
118 struct task_smack
*tsp
;
120 tsp
= kzalloc(sizeof(struct task_smack
), gfp
);
124 tsp
->smk_task
= task
;
125 tsp
->smk_forked
= forked
;
126 INIT_LIST_HEAD(&tsp
->smk_rules
);
127 mutex_init(&tsp
->smk_rules_lock
);
133 * smk_copy_rules - copy a rule set
134 * @nhead - new rules header pointer
135 * @ohead - old rules header pointer
137 * Returns 0 on success, -ENOMEM on error
139 static int smk_copy_rules(struct list_head
*nhead
, struct list_head
*ohead
,
142 struct smack_rule
*nrp
;
143 struct smack_rule
*orp
;
146 INIT_LIST_HEAD(nhead
);
148 list_for_each_entry_rcu(orp
, ohead
, list
) {
149 nrp
= kzalloc(sizeof(struct smack_rule
), gfp
);
155 list_add_rcu(&nrp
->list
, nhead
);
162 * We he, that is fun!
166 * smack_ptrace_access_check - Smack approval on PTRACE_ATTACH
167 * @ctp: child task pointer
168 * @mode: ptrace attachment mode
170 * Returns 0 if access is OK, an error code otherwise
172 * Do the capability checks, and require read and write.
174 static int smack_ptrace_access_check(struct task_struct
*ctp
, unsigned int mode
)
177 struct smk_audit_info ad
;
178 struct smack_known
*skp
;
180 rc
= cap_ptrace_access_check(ctp
, mode
);
184 skp
= smk_of_task(task_security(ctp
));
185 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_TASK
);
186 smk_ad_setfield_u_tsk(&ad
, ctp
);
188 rc
= smk_curacc(skp
->smk_known
, MAY_READWRITE
, &ad
);
193 * smack_ptrace_traceme - Smack approval on PTRACE_TRACEME
194 * @ptp: parent task pointer
196 * Returns 0 if access is OK, an error code otherwise
198 * Do the capability checks, and require read and write.
200 static int smack_ptrace_traceme(struct task_struct
*ptp
)
203 struct smk_audit_info ad
;
204 struct smack_known
*skp
;
206 rc
= cap_ptrace_traceme(ptp
);
210 skp
= smk_of_task(task_security(ptp
));
211 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_TASK
);
212 smk_ad_setfield_u_tsk(&ad
, ptp
);
214 rc
= smk_curacc(skp
->smk_known
, MAY_READWRITE
, &ad
);
219 * smack_syslog - Smack approval on syslog
220 * @type: message type
222 * Require that the task has the floor label
224 * Returns 0 on success, error code otherwise.
226 static int smack_syslog(int typefrom_file
)
229 struct smack_known
*skp
= smk_of_current();
231 if (smack_privileged(CAP_MAC_OVERRIDE
))
234 if (skp
!= &smack_known_floor
)
246 * smack_sb_alloc_security - allocate a superblock blob
247 * @sb: the superblock getting the blob
249 * Returns 0 on success or -ENOMEM on error.
251 static int smack_sb_alloc_security(struct super_block
*sb
)
253 struct superblock_smack
*sbsp
;
255 sbsp
= kzalloc(sizeof(struct superblock_smack
), GFP_KERNEL
);
260 sbsp
->smk_root
= smack_known_floor
.smk_known
;
261 sbsp
->smk_default
= smack_known_floor
.smk_known
;
262 sbsp
->smk_floor
= smack_known_floor
.smk_known
;
263 sbsp
->smk_hat
= smack_known_hat
.smk_known
;
265 * smk_initialized will be zero from kzalloc.
267 sb
->s_security
= sbsp
;
273 * smack_sb_free_security - free a superblock blob
274 * @sb: the superblock getting the blob
277 static void smack_sb_free_security(struct super_block
*sb
)
279 kfree(sb
->s_security
);
280 sb
->s_security
= NULL
;
284 * smack_sb_copy_data - copy mount options data for processing
285 * @orig: where to start
286 * @smackopts: mount options string
288 * Returns 0 on success or -ENOMEM on error.
290 * Copy the Smack specific mount options out of the mount
293 static int smack_sb_copy_data(char *orig
, char *smackopts
)
295 char *cp
, *commap
, *otheropts
, *dp
;
297 otheropts
= (char *)get_zeroed_page(GFP_KERNEL
);
298 if (otheropts
== NULL
)
301 for (cp
= orig
, commap
= orig
; commap
!= NULL
; cp
= commap
+ 1) {
302 if (strstr(cp
, SMK_FSDEFAULT
) == cp
)
304 else if (strstr(cp
, SMK_FSFLOOR
) == cp
)
306 else if (strstr(cp
, SMK_FSHAT
) == cp
)
308 else if (strstr(cp
, SMK_FSROOT
) == cp
)
310 else if (strstr(cp
, SMK_FSTRANS
) == cp
)
315 commap
= strchr(cp
, ',');
324 strcpy(orig
, otheropts
);
325 free_page((unsigned long)otheropts
);
331 * smack_sb_kern_mount - Smack specific mount processing
332 * @sb: the file system superblock
333 * @flags: the mount flags
334 * @data: the smack mount options
336 * Returns 0 on success, an error code on failure
338 static int smack_sb_kern_mount(struct super_block
*sb
, int flags
, void *data
)
340 struct dentry
*root
= sb
->s_root
;
341 struct inode
*inode
= root
->d_inode
;
342 struct superblock_smack
*sp
= sb
->s_security
;
343 struct inode_smack
*isp
;
349 if (sp
->smk_initialized
)
352 sp
->smk_initialized
= 1;
354 for (op
= data
; op
!= NULL
; op
= commap
) {
355 commap
= strchr(op
, ',');
359 if (strncmp(op
, SMK_FSHAT
, strlen(SMK_FSHAT
)) == 0) {
360 op
+= strlen(SMK_FSHAT
);
361 nsp
= smk_import(op
, 0);
364 } else if (strncmp(op
, SMK_FSFLOOR
, strlen(SMK_FSFLOOR
)) == 0) {
365 op
+= strlen(SMK_FSFLOOR
);
366 nsp
= smk_import(op
, 0);
369 } else if (strncmp(op
, SMK_FSDEFAULT
,
370 strlen(SMK_FSDEFAULT
)) == 0) {
371 op
+= strlen(SMK_FSDEFAULT
);
372 nsp
= smk_import(op
, 0);
374 sp
->smk_default
= nsp
;
375 } else if (strncmp(op
, SMK_FSROOT
, strlen(SMK_FSROOT
)) == 0) {
376 op
+= strlen(SMK_FSROOT
);
377 nsp
= smk_import(op
, 0);
380 } else if (strncmp(op
, SMK_FSTRANS
, strlen(SMK_FSTRANS
)) == 0) {
381 op
+= strlen(SMK_FSTRANS
);
382 nsp
= smk_import(op
, 0);
391 * Initialize the root inode.
393 isp
= inode
->i_security
;
394 if (inode
->i_security
== NULL
) {
395 inode
->i_security
= new_inode_smack(sp
->smk_root
);
396 isp
= inode
->i_security
;
398 isp
->smk_inode
= sp
->smk_root
;
401 isp
->smk_flags
|= SMK_INODE_TRANSMUTE
;
407 * smack_sb_statfs - Smack check on statfs
408 * @dentry: identifies the file system in question
410 * Returns 0 if current can read the floor of the filesystem,
411 * and error code otherwise
413 static int smack_sb_statfs(struct dentry
*dentry
)
415 struct superblock_smack
*sbp
= dentry
->d_sb
->s_security
;
417 struct smk_audit_info ad
;
419 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_DENTRY
);
420 smk_ad_setfield_u_fs_path_dentry(&ad
, dentry
);
422 rc
= smk_curacc(sbp
->smk_floor
, MAY_READ
, &ad
);
427 * smack_sb_mount - Smack check for mounting
434 * Returns 0 if current can write the floor of the filesystem
435 * being mounted on, an error code otherwise.
437 static int smack_sb_mount(const char *dev_name
, struct path
*path
,
438 const char *type
, unsigned long flags
, void *data
)
440 struct superblock_smack
*sbp
= path
->dentry
->d_sb
->s_security
;
441 struct smk_audit_info ad
;
443 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_PATH
);
444 smk_ad_setfield_u_fs_path(&ad
, *path
);
446 return smk_curacc(sbp
->smk_floor
, MAY_WRITE
, &ad
);
450 * smack_sb_umount - Smack check for unmounting
451 * @mnt: file system to unmount
454 * Returns 0 if current can write the floor of the filesystem
455 * being unmounted, an error code otherwise.
457 static int smack_sb_umount(struct vfsmount
*mnt
, int flags
)
459 struct superblock_smack
*sbp
;
460 struct smk_audit_info ad
;
463 path
.dentry
= mnt
->mnt_root
;
466 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_PATH
);
467 smk_ad_setfield_u_fs_path(&ad
, path
);
469 sbp
= path
.dentry
->d_sb
->s_security
;
470 return smk_curacc(sbp
->smk_floor
, MAY_WRITE
, &ad
);
478 * smack_bprm_set_creds - set creds for exec
479 * @bprm: the exec information
481 * Returns 0 if it gets a blob, -ENOMEM otherwise
483 static int smack_bprm_set_creds(struct linux_binprm
*bprm
)
485 struct inode
*inode
= file_inode(bprm
->file
);
486 struct task_smack
*bsp
= bprm
->cred
->security
;
487 struct inode_smack
*isp
;
490 rc
= cap_bprm_set_creds(bprm
);
494 if (bprm
->cred_prepared
)
497 isp
= inode
->i_security
;
498 if (isp
->smk_task
== NULL
|| isp
->smk_task
== bsp
->smk_task
)
504 bsp
->smk_task
= isp
->smk_task
;
505 bprm
->per_clear
|= PER_CLEAR_ON_SETID
;
511 * smack_bprm_committing_creds - Prepare to install the new credentials
514 * @bprm: binprm for exec
516 static void smack_bprm_committing_creds(struct linux_binprm
*bprm
)
518 struct task_smack
*bsp
= bprm
->cred
->security
;
520 if (bsp
->smk_task
!= bsp
->smk_forked
)
521 current
->pdeath_signal
= 0;
525 * smack_bprm_secureexec - Return the decision to use secureexec.
526 * @bprm: binprm for exec
528 * Returns 0 on success.
530 static int smack_bprm_secureexec(struct linux_binprm
*bprm
)
532 struct task_smack
*tsp
= current_security();
533 int ret
= cap_bprm_secureexec(bprm
);
535 if (!ret
&& (tsp
->smk_task
!= tsp
->smk_forked
))
546 * smack_inode_alloc_security - allocate an inode blob
547 * @inode: the inode in need of a blob
549 * Returns 0 if it gets a blob, -ENOMEM otherwise
551 static int smack_inode_alloc_security(struct inode
*inode
)
553 struct smack_known
*skp
= smk_of_current();
555 inode
->i_security
= new_inode_smack(skp
->smk_known
);
556 if (inode
->i_security
== NULL
)
562 * smack_inode_free_security - free an inode blob
563 * @inode: the inode with a blob
565 * Clears the blob pointer in inode
567 static void smack_inode_free_security(struct inode
*inode
)
569 kfree(inode
->i_security
);
570 inode
->i_security
= NULL
;
574 * smack_inode_init_security - copy out the smack from an inode
578 * @name: where to put the attribute name
579 * @value: where to put the attribute value
580 * @len: where to put the length of the attribute
582 * Returns 0 if it all works out, -ENOMEM if there's no memory
584 static int smack_inode_init_security(struct inode
*inode
, struct inode
*dir
,
585 const struct qstr
*qstr
, char **name
,
586 void **value
, size_t *len
)
588 struct inode_smack
*issp
= inode
->i_security
;
589 struct smack_known
*skp
= smk_of_current();
590 char *isp
= smk_of_inode(inode
);
591 char *dsp
= smk_of_inode(dir
);
595 *name
= kstrdup(XATTR_SMACK_SUFFIX
, GFP_NOFS
);
602 may
= smk_access_entry(skp
->smk_known
, dsp
, &skp
->smk_rules
);
606 * If the access rule allows transmutation and
607 * the directory requests transmutation then
608 * by all means transmute.
609 * Mark the inode as changed.
611 if (may
> 0 && ((may
& MAY_TRANSMUTE
) != 0) &&
612 smk_inode_transmutable(dir
)) {
614 issp
->smk_flags
|= SMK_INODE_CHANGED
;
617 *value
= kstrdup(isp
, GFP_NOFS
);
623 *len
= strlen(isp
) + 1;
629 * smack_inode_link - Smack check on link
630 * @old_dentry: the existing object
632 * @new_dentry: the new object
634 * Returns 0 if access is permitted, an error code otherwise
636 static int smack_inode_link(struct dentry
*old_dentry
, struct inode
*dir
,
637 struct dentry
*new_dentry
)
640 struct smk_audit_info ad
;
643 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_DENTRY
);
644 smk_ad_setfield_u_fs_path_dentry(&ad
, old_dentry
);
646 isp
= smk_of_inode(old_dentry
->d_inode
);
647 rc
= smk_curacc(isp
, MAY_WRITE
, &ad
);
649 if (rc
== 0 && new_dentry
->d_inode
!= NULL
) {
650 isp
= smk_of_inode(new_dentry
->d_inode
);
651 smk_ad_setfield_u_fs_path_dentry(&ad
, new_dentry
);
652 rc
= smk_curacc(isp
, MAY_WRITE
, &ad
);
659 * smack_inode_unlink - Smack check on inode deletion
660 * @dir: containing directory object
661 * @dentry: file to unlink
663 * Returns 0 if current can write the containing directory
664 * and the object, error code otherwise
666 static int smack_inode_unlink(struct inode
*dir
, struct dentry
*dentry
)
668 struct inode
*ip
= dentry
->d_inode
;
669 struct smk_audit_info ad
;
672 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_DENTRY
);
673 smk_ad_setfield_u_fs_path_dentry(&ad
, dentry
);
676 * You need write access to the thing you're unlinking
678 rc
= smk_curacc(smk_of_inode(ip
), MAY_WRITE
, &ad
);
681 * You also need write access to the containing directory
683 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_INODE
);
684 smk_ad_setfield_u_fs_inode(&ad
, dir
);
685 rc
= smk_curacc(smk_of_inode(dir
), MAY_WRITE
, &ad
);
691 * smack_inode_rmdir - Smack check on directory deletion
692 * @dir: containing directory object
693 * @dentry: directory to unlink
695 * Returns 0 if current can write the containing directory
696 * and the directory, error code otherwise
698 static int smack_inode_rmdir(struct inode
*dir
, struct dentry
*dentry
)
700 struct smk_audit_info ad
;
703 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_DENTRY
);
704 smk_ad_setfield_u_fs_path_dentry(&ad
, dentry
);
707 * You need write access to the thing you're removing
709 rc
= smk_curacc(smk_of_inode(dentry
->d_inode
), MAY_WRITE
, &ad
);
712 * You also need write access to the containing directory
714 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_INODE
);
715 smk_ad_setfield_u_fs_inode(&ad
, dir
);
716 rc
= smk_curacc(smk_of_inode(dir
), MAY_WRITE
, &ad
);
723 * smack_inode_rename - Smack check on rename
724 * @old_inode: the old directory
725 * @old_dentry: unused
726 * @new_inode: the new directory
727 * @new_dentry: unused
729 * Read and write access is required on both the old and
732 * Returns 0 if access is permitted, an error code otherwise
734 static int smack_inode_rename(struct inode
*old_inode
,
735 struct dentry
*old_dentry
,
736 struct inode
*new_inode
,
737 struct dentry
*new_dentry
)
741 struct smk_audit_info ad
;
743 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_DENTRY
);
744 smk_ad_setfield_u_fs_path_dentry(&ad
, old_dentry
);
746 isp
= smk_of_inode(old_dentry
->d_inode
);
747 rc
= smk_curacc(isp
, MAY_READWRITE
, &ad
);
749 if (rc
== 0 && new_dentry
->d_inode
!= NULL
) {
750 isp
= smk_of_inode(new_dentry
->d_inode
);
751 smk_ad_setfield_u_fs_path_dentry(&ad
, new_dentry
);
752 rc
= smk_curacc(isp
, MAY_READWRITE
, &ad
);
758 * smack_inode_permission - Smack version of permission()
759 * @inode: the inode in question
760 * @mask: the access requested
762 * This is the important Smack hook.
764 * Returns 0 if access is permitted, -EACCES otherwise
766 static int smack_inode_permission(struct inode
*inode
, int mask
)
768 struct smk_audit_info ad
;
769 int no_block
= mask
& MAY_NOT_BLOCK
;
771 mask
&= (MAY_READ
|MAY_WRITE
|MAY_EXEC
|MAY_APPEND
);
773 * No permission to check. Existence test. Yup, it's there.
778 /* May be droppable after audit */
781 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_INODE
);
782 smk_ad_setfield_u_fs_inode(&ad
, inode
);
783 return smk_curacc(smk_of_inode(inode
), mask
, &ad
);
787 * smack_inode_setattr - Smack check for setting attributes
788 * @dentry: the object
789 * @iattr: for the force flag
791 * Returns 0 if access is permitted, an error code otherwise
793 static int smack_inode_setattr(struct dentry
*dentry
, struct iattr
*iattr
)
795 struct smk_audit_info ad
;
797 * Need to allow for clearing the setuid bit.
799 if (iattr
->ia_valid
& ATTR_FORCE
)
801 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_DENTRY
);
802 smk_ad_setfield_u_fs_path_dentry(&ad
, dentry
);
804 return smk_curacc(smk_of_inode(dentry
->d_inode
), MAY_WRITE
, &ad
);
808 * smack_inode_getattr - Smack check for getting attributes
810 * @dentry: the object
812 * Returns 0 if access is permitted, an error code otherwise
814 static int smack_inode_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
)
816 struct smk_audit_info ad
;
819 path
.dentry
= dentry
;
822 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_PATH
);
823 smk_ad_setfield_u_fs_path(&ad
, path
);
824 return smk_curacc(smk_of_inode(dentry
->d_inode
), MAY_READ
, &ad
);
828 * smack_inode_setxattr - Smack check for setting xattrs
829 * @dentry: the object
830 * @name: name of the attribute
835 * This protects the Smack attribute explicitly.
837 * Returns 0 if access is permitted, an error code otherwise
839 static int smack_inode_setxattr(struct dentry
*dentry
, const char *name
,
840 const void *value
, size_t size
, int flags
)
842 struct smk_audit_info ad
;
845 if (strcmp(name
, XATTR_NAME_SMACK
) == 0 ||
846 strcmp(name
, XATTR_NAME_SMACKIPIN
) == 0 ||
847 strcmp(name
, XATTR_NAME_SMACKIPOUT
) == 0 ||
848 strcmp(name
, XATTR_NAME_SMACKEXEC
) == 0 ||
849 strcmp(name
, XATTR_NAME_SMACKMMAP
) == 0) {
850 if (!smack_privileged(CAP_MAC_ADMIN
))
853 * check label validity here so import wont fail on
856 if (size
== 0 || size
>= SMK_LONGLABEL
||
857 smk_import(value
, size
) == NULL
)
859 } else if (strcmp(name
, XATTR_NAME_SMACKTRANSMUTE
) == 0) {
860 if (!smack_privileged(CAP_MAC_ADMIN
))
862 if (size
!= TRANS_TRUE_SIZE
||
863 strncmp(value
, TRANS_TRUE
, TRANS_TRUE_SIZE
) != 0)
866 rc
= cap_inode_setxattr(dentry
, name
, value
, size
, flags
);
868 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_DENTRY
);
869 smk_ad_setfield_u_fs_path_dentry(&ad
, dentry
);
872 rc
= smk_curacc(smk_of_inode(dentry
->d_inode
), MAY_WRITE
, &ad
);
878 * smack_inode_post_setxattr - Apply the Smack update approved above
880 * @name: attribute name
881 * @value: attribute value
882 * @size: attribute size
885 * Set the pointer in the inode blob to the entry found
886 * in the master label list.
888 static void smack_inode_post_setxattr(struct dentry
*dentry
, const char *name
,
889 const void *value
, size_t size
, int flags
)
891 struct smack_known
*skp
;
892 struct inode_smack
*isp
= dentry
->d_inode
->i_security
;
894 if (strcmp(name
, XATTR_NAME_SMACKTRANSMUTE
) == 0) {
895 isp
->smk_flags
|= SMK_INODE_TRANSMUTE
;
899 skp
= smk_import_entry(value
, size
);
900 if (strcmp(name
, XATTR_NAME_SMACK
) == 0) {
902 isp
->smk_inode
= skp
->smk_known
;
904 isp
->smk_inode
= smack_known_invalid
.smk_known
;
905 } else if (strcmp(name
, XATTR_NAME_SMACKEXEC
) == 0) {
909 isp
->smk_task
= &smack_known_invalid
;
910 } else if (strcmp(name
, XATTR_NAME_SMACKMMAP
) == 0) {
914 isp
->smk_mmap
= &smack_known_invalid
;
921 * smack_inode_getxattr - Smack check on getxattr
922 * @dentry: the object
925 * Returns 0 if access is permitted, an error code otherwise
927 static int smack_inode_getxattr(struct dentry
*dentry
, const char *name
)
929 struct smk_audit_info ad
;
931 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_DENTRY
);
932 smk_ad_setfield_u_fs_path_dentry(&ad
, dentry
);
934 return smk_curacc(smk_of_inode(dentry
->d_inode
), MAY_READ
, &ad
);
938 * smack_inode_removexattr - Smack check on removexattr
939 * @dentry: the object
940 * @name: name of the attribute
942 * Removing the Smack attribute requires CAP_MAC_ADMIN
944 * Returns 0 if access is permitted, an error code otherwise
946 static int smack_inode_removexattr(struct dentry
*dentry
, const char *name
)
948 struct inode_smack
*isp
;
949 struct smk_audit_info ad
;
952 if (strcmp(name
, XATTR_NAME_SMACK
) == 0 ||
953 strcmp(name
, XATTR_NAME_SMACKIPIN
) == 0 ||
954 strcmp(name
, XATTR_NAME_SMACKIPOUT
) == 0 ||
955 strcmp(name
, XATTR_NAME_SMACKEXEC
) == 0 ||
956 strcmp(name
, XATTR_NAME_SMACKTRANSMUTE
) == 0 ||
957 strcmp(name
, XATTR_NAME_SMACKMMAP
)) {
958 if (!smack_privileged(CAP_MAC_ADMIN
))
961 rc
= cap_inode_removexattr(dentry
, name
);
963 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_DENTRY
);
964 smk_ad_setfield_u_fs_path_dentry(&ad
, dentry
);
966 rc
= smk_curacc(smk_of_inode(dentry
->d_inode
), MAY_WRITE
, &ad
);
969 isp
= dentry
->d_inode
->i_security
;
970 isp
->smk_task
= NULL
;
971 isp
->smk_mmap
= NULL
;
978 * smack_inode_getsecurity - get smack xattrs
980 * @name: attribute name
981 * @buffer: where to put the result
984 * Returns the size of the attribute or an error code
986 static int smack_inode_getsecurity(const struct inode
*inode
,
987 const char *name
, void **buffer
,
990 struct socket_smack
*ssp
;
992 struct super_block
*sbp
;
993 struct inode
*ip
= (struct inode
*)inode
;
998 if (strcmp(name
, XATTR_SMACK_SUFFIX
) == 0) {
999 isp
= smk_of_inode(inode
);
1000 ilen
= strlen(isp
) + 1;
1006 * The rest of the Smack xattrs are only on sockets.
1009 if (sbp
->s_magic
!= SOCKFS_MAGIC
)
1012 sock
= SOCKET_I(ip
);
1013 if (sock
== NULL
|| sock
->sk
== NULL
)
1016 ssp
= sock
->sk
->sk_security
;
1018 if (strcmp(name
, XATTR_SMACK_IPIN
) == 0)
1020 else if (strcmp(name
, XATTR_SMACK_IPOUT
) == 0)
1021 isp
= ssp
->smk_out
->smk_known
;
1025 ilen
= strlen(isp
) + 1;
1036 * smack_inode_listsecurity - list the Smack attributes
1037 * @inode: the object
1038 * @buffer: where they go
1039 * @buffer_size: size of buffer
1041 * Returns 0 on success, -EINVAL otherwise
1043 static int smack_inode_listsecurity(struct inode
*inode
, char *buffer
,
1046 int len
= strlen(XATTR_NAME_SMACK
);
1048 if (buffer
!= NULL
&& len
<= buffer_size
) {
1049 memcpy(buffer
, XATTR_NAME_SMACK
, len
);
1056 * smack_inode_getsecid - Extract inode's security id
1057 * @inode: inode to extract the info from
1058 * @secid: where result will be saved
1060 static void smack_inode_getsecid(const struct inode
*inode
, u32
*secid
)
1062 struct inode_smack
*isp
= inode
->i_security
;
1064 *secid
= smack_to_secid(isp
->smk_inode
);
1072 * smack_file_permission - Smack check on file operations
1078 * Should access checks be done on each read or write?
1079 * UNICOS and SELinux say yes.
1080 * Trusted Solaris, Trusted Irix, and just about everyone else says no.
1082 * I'll say no for now. Smack does not do the frequent
1083 * label changing that SELinux does.
1085 static int smack_file_permission(struct file
*file
, int mask
)
1091 * smack_file_alloc_security - assign a file security blob
1094 * The security blob for a file is a pointer to the master
1095 * label list, so no allocation is done.
1099 static int smack_file_alloc_security(struct file
*file
)
1101 struct smack_known
*skp
= smk_of_current();
1103 file
->f_security
= skp
->smk_known
;
1108 * smack_file_free_security - clear a file security blob
1111 * The security blob for a file is a pointer to the master
1112 * label list, so no memory is freed.
1114 static void smack_file_free_security(struct file
*file
)
1116 file
->f_security
= NULL
;
1120 * smack_file_ioctl - Smack check on ioctls
1125 * Relies heavily on the correct use of the ioctl command conventions.
1127 * Returns 0 if allowed, error code otherwise
1129 static int smack_file_ioctl(struct file
*file
, unsigned int cmd
,
1133 struct smk_audit_info ad
;
1135 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_PATH
);
1136 smk_ad_setfield_u_fs_path(&ad
, file
->f_path
);
1138 if (_IOC_DIR(cmd
) & _IOC_WRITE
)
1139 rc
= smk_curacc(file
->f_security
, MAY_WRITE
, &ad
);
1141 if (rc
== 0 && (_IOC_DIR(cmd
) & _IOC_READ
))
1142 rc
= smk_curacc(file
->f_security
, MAY_READ
, &ad
);
1148 * smack_file_lock - Smack check on file locking
1152 * Returns 0 if current has write access, error code otherwise
1154 static int smack_file_lock(struct file
*file
, unsigned int cmd
)
1156 struct smk_audit_info ad
;
1158 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_PATH
);
1159 smk_ad_setfield_u_fs_path(&ad
, file
->f_path
);
1160 return smk_curacc(file
->f_security
, MAY_WRITE
, &ad
);
1164 * smack_file_fcntl - Smack check on fcntl
1166 * @cmd: what action to check
1169 * Generally these operations are harmless.
1170 * File locking operations present an obvious mechanism
1171 * for passing information, so they require write access.
1173 * Returns 0 if current has access, error code otherwise
1175 static int smack_file_fcntl(struct file
*file
, unsigned int cmd
,
1178 struct smk_audit_info ad
;
1188 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_PATH
);
1189 smk_ad_setfield_u_fs_path(&ad
, file
->f_path
);
1190 rc
= smk_curacc(file
->f_security
, MAY_WRITE
, &ad
);
1201 * Check permissions for a mmap operation. The @file may be NULL, e.g.
1202 * if mapping anonymous memory.
1203 * @file contains the file structure for file to map (may be NULL).
1204 * @reqprot contains the protection requested by the application.
1205 * @prot contains the protection that will be applied by the kernel.
1206 * @flags contains the operational flags.
1207 * Return 0 if permission is granted.
1209 static int smack_mmap_file(struct file
*file
,
1210 unsigned long reqprot
, unsigned long prot
,
1211 unsigned long flags
)
1213 struct smack_known
*skp
;
1214 struct smack_known
*mkp
;
1215 struct smack_rule
*srp
;
1216 struct task_smack
*tsp
;
1218 struct inode_smack
*isp
;
1227 isp
= file_inode(file
)->i_security
;
1228 if (isp
->smk_mmap
== NULL
)
1230 mkp
= isp
->smk_mmap
;
1232 tsp
= current_security();
1233 skp
= smk_of_current();
1238 * For each Smack rule associated with the subject
1239 * label verify that the SMACK64MMAP also has access
1240 * to that rule's object label.
1242 list_for_each_entry_rcu(srp
, &skp
->smk_rules
, list
) {
1243 osmack
= srp
->smk_object
;
1245 * Matching labels always allows access.
1247 if (mkp
->smk_known
== osmack
)
1250 * If there is a matching local rule take
1251 * that into account as well.
1253 may
= smk_access_entry(srp
->smk_subject
->smk_known
, osmack
,
1256 may
= srp
->smk_access
;
1258 may
&= srp
->smk_access
;
1260 * If may is zero the SMACK64MMAP subject can't
1261 * possibly have less access.
1267 * Fetch the global list entry.
1268 * If there isn't one a SMACK64MMAP subject
1269 * can't have as much access as current.
1271 mmay
= smk_access_entry(mkp
->smk_known
, osmack
,
1273 if (mmay
== -ENOENT
) {
1278 * If there is a local entry it modifies the
1279 * potential access, too.
1281 tmay
= smk_access_entry(mkp
->smk_known
, osmack
,
1283 if (tmay
!= -ENOENT
)
1287 * If there is any access available to current that is
1288 * not available to a SMACK64MMAP subject
1291 if ((may
| mmay
) != mmay
) {
1303 * smack_file_set_fowner - set the file security blob value
1304 * @file: object in question
1307 * Further research may be required on this one.
1309 static int smack_file_set_fowner(struct file
*file
)
1311 struct smack_known
*skp
= smk_of_current();
1313 file
->f_security
= skp
->smk_known
;
1318 * smack_file_send_sigiotask - Smack on sigio
1319 * @tsk: The target task
1320 * @fown: the object the signal come from
1323 * Allow a privileged task to get signals even if it shouldn't
1325 * Returns 0 if a subject with the object's smack could
1326 * write to the task, an error code otherwise.
1328 static int smack_file_send_sigiotask(struct task_struct
*tsk
,
1329 struct fown_struct
*fown
, int signum
)
1331 struct smack_known
*skp
;
1332 struct smack_known
*tkp
= smk_of_task(tsk
->cred
->security
);
1335 struct smk_audit_info ad
;
1338 * struct fown_struct is never outside the context of a struct file
1340 file
= container_of(fown
, struct file
, f_owner
);
1342 /* we don't log here as rc can be overriden */
1343 skp
= smk_find_entry(file
->f_security
);
1344 rc
= smk_access(skp
, tkp
->smk_known
, MAY_WRITE
, NULL
);
1345 if (rc
!= 0 && has_capability(tsk
, CAP_MAC_OVERRIDE
))
1348 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_TASK
);
1349 smk_ad_setfield_u_tsk(&ad
, tsk
);
1350 smack_log(file
->f_security
, tkp
->smk_known
, MAY_WRITE
, rc
, &ad
);
1355 * smack_file_receive - Smack file receive check
1358 * Returns 0 if current has access, error code otherwise
1360 static int smack_file_receive(struct file
*file
)
1363 struct smk_audit_info ad
;
1365 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_TASK
);
1366 smk_ad_setfield_u_fs_path(&ad
, file
->f_path
);
1368 * This code relies on bitmasks.
1370 if (file
->f_mode
& FMODE_READ
)
1372 if (file
->f_mode
& FMODE_WRITE
)
1375 return smk_curacc(file
->f_security
, may
, &ad
);
1379 * smack_file_open - Smack dentry open processing
1383 * Set the security blob in the file structure.
1387 static int smack_file_open(struct file
*file
, const struct cred
*cred
)
1389 struct inode_smack
*isp
= file_inode(file
)->i_security
;
1391 file
->f_security
= isp
->smk_inode
;
1401 * smack_cred_alloc_blank - "allocate" blank task-level security credentials
1402 * @new: the new credentials
1403 * @gfp: the atomicity of any memory allocations
1405 * Prepare a blank set of credentials for modification. This must allocate all
1406 * the memory the LSM module might require such that cred_transfer() can
1407 * complete without error.
1409 static int smack_cred_alloc_blank(struct cred
*cred
, gfp_t gfp
)
1411 struct task_smack
*tsp
;
1413 tsp
= new_task_smack(NULL
, NULL
, gfp
);
1417 cred
->security
= tsp
;
1424 * smack_cred_free - "free" task-level security credentials
1425 * @cred: the credentials in question
1428 static void smack_cred_free(struct cred
*cred
)
1430 struct task_smack
*tsp
= cred
->security
;
1431 struct smack_rule
*rp
;
1432 struct list_head
*l
;
1433 struct list_head
*n
;
1437 cred
->security
= NULL
;
1439 list_for_each_safe(l
, n
, &tsp
->smk_rules
) {
1440 rp
= list_entry(l
, struct smack_rule
, list
);
1441 list_del(&rp
->list
);
1448 * smack_cred_prepare - prepare new set of credentials for modification
1449 * @new: the new credentials
1450 * @old: the original credentials
1451 * @gfp: the atomicity of any memory allocations
1453 * Prepare a new set of credentials for modification.
1455 static int smack_cred_prepare(struct cred
*new, const struct cred
*old
,
1458 struct task_smack
*old_tsp
= old
->security
;
1459 struct task_smack
*new_tsp
;
1462 new_tsp
= new_task_smack(old_tsp
->smk_task
, old_tsp
->smk_task
, gfp
);
1463 if (new_tsp
== NULL
)
1466 rc
= smk_copy_rules(&new_tsp
->smk_rules
, &old_tsp
->smk_rules
, gfp
);
1470 new->security
= new_tsp
;
1475 * smack_cred_transfer - Transfer the old credentials to the new credentials
1476 * @new: the new credentials
1477 * @old: the original credentials
1479 * Fill in a set of blank credentials from another set of credentials.
1481 static void smack_cred_transfer(struct cred
*new, const struct cred
*old
)
1483 struct task_smack
*old_tsp
= old
->security
;
1484 struct task_smack
*new_tsp
= new->security
;
1486 new_tsp
->smk_task
= old_tsp
->smk_task
;
1487 new_tsp
->smk_forked
= old_tsp
->smk_task
;
1488 mutex_init(&new_tsp
->smk_rules_lock
);
1489 INIT_LIST_HEAD(&new_tsp
->smk_rules
);
1492 /* cbs copy rule list */
1496 * smack_kernel_act_as - Set the subjective context in a set of credentials
1497 * @new: points to the set of credentials to be modified.
1498 * @secid: specifies the security ID to be set
1500 * Set the security data for a kernel service.
1502 static int smack_kernel_act_as(struct cred
*new, u32 secid
)
1504 struct task_smack
*new_tsp
= new->security
;
1505 struct smack_known
*skp
= smack_from_secid(secid
);
1510 new_tsp
->smk_task
= skp
;
1515 * smack_kernel_create_files_as - Set the file creation label in a set of creds
1516 * @new: points to the set of credentials to be modified
1517 * @inode: points to the inode to use as a reference
1519 * Set the file creation context in a set of credentials to the same
1520 * as the objective context of the specified inode
1522 static int smack_kernel_create_files_as(struct cred
*new,
1523 struct inode
*inode
)
1525 struct inode_smack
*isp
= inode
->i_security
;
1526 struct task_smack
*tsp
= new->security
;
1528 tsp
->smk_forked
= smk_find_entry(isp
->smk_inode
);
1529 tsp
->smk_task
= tsp
->smk_forked
;
1534 * smk_curacc_on_task - helper to log task related access
1535 * @p: the task object
1536 * @access: the access requested
1537 * @caller: name of the calling function for audit
1539 * Return 0 if access is permitted
1541 static int smk_curacc_on_task(struct task_struct
*p
, int access
,
1544 struct smk_audit_info ad
;
1545 struct smack_known
*skp
= smk_of_task(task_security(p
));
1547 smk_ad_init(&ad
, caller
, LSM_AUDIT_DATA_TASK
);
1548 smk_ad_setfield_u_tsk(&ad
, p
);
1549 return smk_curacc(skp
->smk_known
, access
, &ad
);
1553 * smack_task_setpgid - Smack check on setting pgid
1554 * @p: the task object
1557 * Return 0 if write access is permitted
1559 static int smack_task_setpgid(struct task_struct
*p
, pid_t pgid
)
1561 return smk_curacc_on_task(p
, MAY_WRITE
, __func__
);
1565 * smack_task_getpgid - Smack access check for getpgid
1566 * @p: the object task
1568 * Returns 0 if current can read the object task, error code otherwise
1570 static int smack_task_getpgid(struct task_struct
*p
)
1572 return smk_curacc_on_task(p
, MAY_READ
, __func__
);
1576 * smack_task_getsid - Smack access check for getsid
1577 * @p: the object task
1579 * Returns 0 if current can read the object task, error code otherwise
1581 static int smack_task_getsid(struct task_struct
*p
)
1583 return smk_curacc_on_task(p
, MAY_READ
, __func__
);
1587 * smack_task_getsecid - get the secid of the task
1588 * @p: the object task
1589 * @secid: where to put the result
1591 * Sets the secid to contain a u32 version of the smack label.
1593 static void smack_task_getsecid(struct task_struct
*p
, u32
*secid
)
1595 struct smack_known
*skp
= smk_of_task(task_security(p
));
1597 *secid
= skp
->smk_secid
;
1601 * smack_task_setnice - Smack check on setting nice
1602 * @p: the task object
1605 * Return 0 if write access is permitted
1607 static int smack_task_setnice(struct task_struct
*p
, int nice
)
1611 rc
= cap_task_setnice(p
, nice
);
1613 rc
= smk_curacc_on_task(p
, MAY_WRITE
, __func__
);
1618 * smack_task_setioprio - Smack check on setting ioprio
1619 * @p: the task object
1622 * Return 0 if write access is permitted
1624 static int smack_task_setioprio(struct task_struct
*p
, int ioprio
)
1628 rc
= cap_task_setioprio(p
, ioprio
);
1630 rc
= smk_curacc_on_task(p
, MAY_WRITE
, __func__
);
1635 * smack_task_getioprio - Smack check on reading ioprio
1636 * @p: the task object
1638 * Return 0 if read access is permitted
1640 static int smack_task_getioprio(struct task_struct
*p
)
1642 return smk_curacc_on_task(p
, MAY_READ
, __func__
);
1646 * smack_task_setscheduler - Smack check on setting scheduler
1647 * @p: the task object
1651 * Return 0 if read access is permitted
1653 static int smack_task_setscheduler(struct task_struct
*p
)
1657 rc
= cap_task_setscheduler(p
);
1659 rc
= smk_curacc_on_task(p
, MAY_WRITE
, __func__
);
1664 * smack_task_getscheduler - Smack check on reading scheduler
1665 * @p: the task object
1667 * Return 0 if read access is permitted
1669 static int smack_task_getscheduler(struct task_struct
*p
)
1671 return smk_curacc_on_task(p
, MAY_READ
, __func__
);
1675 * smack_task_movememory - Smack check on moving memory
1676 * @p: the task object
1678 * Return 0 if write access is permitted
1680 static int smack_task_movememory(struct task_struct
*p
)
1682 return smk_curacc_on_task(p
, MAY_WRITE
, __func__
);
1686 * smack_task_kill - Smack check on signal delivery
1687 * @p: the task object
1690 * @secid: identifies the smack to use in lieu of current's
1692 * Return 0 if write access is permitted
1694 * The secid behavior is an artifact of an SELinux hack
1695 * in the USB code. Someday it may go away.
1697 static int smack_task_kill(struct task_struct
*p
, struct siginfo
*info
,
1700 struct smk_audit_info ad
;
1701 struct smack_known
*skp
;
1702 struct smack_known
*tkp
= smk_of_task(task_security(p
));
1704 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_TASK
);
1705 smk_ad_setfield_u_tsk(&ad
, p
);
1707 * Sending a signal requires that the sender
1708 * can write the receiver.
1711 return smk_curacc(tkp
->smk_known
, MAY_WRITE
, &ad
);
1713 * If the secid isn't 0 we're dealing with some USB IO
1714 * specific behavior. This is not clean. For one thing
1715 * we can't take privilege into account.
1717 skp
= smack_from_secid(secid
);
1718 return smk_access(skp
, tkp
->smk_known
, MAY_WRITE
, &ad
);
1722 * smack_task_wait - Smack access check for waiting
1723 * @p: task to wait for
1727 static int smack_task_wait(struct task_struct
*p
)
1730 * Allow the operation to succeed.
1732 * In userless environments (e.g. phones) programs
1733 * get marked with SMACK64EXEC and even if the parent
1734 * and child shouldn't be talking the parent still
1735 * may expect to know when the child exits.
1741 * smack_task_to_inode - copy task smack into the inode blob
1742 * @p: task to copy from
1743 * @inode: inode to copy to
1745 * Sets the smack pointer in the inode security blob
1747 static void smack_task_to_inode(struct task_struct
*p
, struct inode
*inode
)
1749 struct inode_smack
*isp
= inode
->i_security
;
1750 struct smack_known
*skp
= smk_of_task(task_security(p
));
1752 isp
->smk_inode
= skp
->smk_known
;
1760 * smack_sk_alloc_security - Allocate a socket blob
1763 * @gfp_flags: memory allocation flags
1765 * Assign Smack pointers to current
1767 * Returns 0 on success, -ENOMEM is there's no memory
1769 static int smack_sk_alloc_security(struct sock
*sk
, int family
, gfp_t gfp_flags
)
1771 struct smack_known
*skp
= smk_of_current();
1772 struct socket_smack
*ssp
;
1774 ssp
= kzalloc(sizeof(struct socket_smack
), gfp_flags
);
1778 ssp
->smk_in
= skp
->smk_known
;
1780 ssp
->smk_packet
= NULL
;
1782 sk
->sk_security
= ssp
;
1788 * smack_sk_free_security - Free a socket blob
1791 * Clears the blob pointer
1793 static void smack_sk_free_security(struct sock
*sk
)
1795 kfree(sk
->sk_security
);
1799 * smack_host_label - check host based restrictions
1800 * @sip: the object end
1802 * looks for host based access restrictions
1804 * This version will only be appropriate for really small sets of single label
1805 * hosts. The caller is responsible for ensuring that the RCU read lock is
1806 * taken before calling this function.
1808 * Returns the label of the far end or NULL if it's not special.
1810 static char *smack_host_label(struct sockaddr_in
*sip
)
1812 struct smk_netlbladdr
*snp
;
1813 struct in_addr
*siap
= &sip
->sin_addr
;
1815 if (siap
->s_addr
== 0)
1818 list_for_each_entry_rcu(snp
, &smk_netlbladdr_list
, list
)
1820 * we break after finding the first match because
1821 * the list is sorted from longest to shortest mask
1822 * so we have found the most specific match
1824 if ((&snp
->smk_host
.sin_addr
)->s_addr
==
1825 (siap
->s_addr
& (&snp
->smk_mask
)->s_addr
)) {
1826 /* we have found the special CIPSO option */
1827 if (snp
->smk_label
== smack_cipso_option
)
1829 return snp
->smk_label
;
1836 * smack_netlabel - Set the secattr on a socket
1838 * @labeled: socket label scheme
1840 * Convert the outbound smack value (smk_out) to a
1841 * secattr and attach it to the socket.
1843 * Returns 0 on success or an error code
1845 static int smack_netlabel(struct sock
*sk
, int labeled
)
1847 struct smack_known
*skp
;
1848 struct socket_smack
*ssp
= sk
->sk_security
;
1852 * Usually the netlabel code will handle changing the
1853 * packet labeling based on the label.
1854 * The case of a single label host is different, because
1855 * a single label host should never get a labeled packet
1856 * even though the label is usually associated with a packet
1860 bh_lock_sock_nested(sk
);
1862 if (ssp
->smk_out
== smack_net_ambient
||
1863 labeled
== SMACK_UNLABELED_SOCKET
)
1864 netlbl_sock_delattr(sk
);
1867 rc
= netlbl_sock_setattr(sk
, sk
->sk_family
, &skp
->smk_netlabel
);
1877 * smack_netlbel_send - Set the secattr on a socket and perform access checks
1879 * @sap: the destination address
1881 * Set the correct secattr for the given socket based on the destination
1882 * address and perform any outbound access checks needed.
1884 * Returns 0 on success or an error code.
1887 static int smack_netlabel_send(struct sock
*sk
, struct sockaddr_in
*sap
)
1889 struct smack_known
*skp
;
1893 struct socket_smack
*ssp
= sk
->sk_security
;
1894 struct smk_audit_info ad
;
1897 hostsp
= smack_host_label(sap
);
1898 if (hostsp
!= NULL
) {
1900 struct lsm_network_audit net
;
1902 smk_ad_init_net(&ad
, __func__
, LSM_AUDIT_DATA_NET
, &net
);
1903 ad
.a
.u
.net
->family
= sap
->sin_family
;
1904 ad
.a
.u
.net
->dport
= sap
->sin_port
;
1905 ad
.a
.u
.net
->v4info
.daddr
= sap
->sin_addr
.s_addr
;
1907 sk_lbl
= SMACK_UNLABELED_SOCKET
;
1909 rc
= smk_access(skp
, hostsp
, MAY_WRITE
, &ad
);
1911 sk_lbl
= SMACK_CIPSO_SOCKET
;
1918 return smack_netlabel(sk
, sk_lbl
);
1922 * smk_ipv6_port_label - Smack port access table management
1926 * Create or update the port list entry
1928 static void smk_ipv6_port_label(struct socket
*sock
, struct sockaddr
*address
)
1930 struct sock
*sk
= sock
->sk
;
1931 struct sockaddr_in6
*addr6
;
1932 struct socket_smack
*ssp
= sock
->sk
->sk_security
;
1933 struct smk_port_label
*spp
;
1934 unsigned short port
= 0;
1936 if (address
== NULL
) {
1938 * This operation is changing the Smack information
1939 * on the bound socket. Take the changes to the port
1942 list_for_each_entry(spp
, &smk_ipv6_port_list
, list
) {
1943 if (sk
!= spp
->smk_sock
)
1945 spp
->smk_in
= ssp
->smk_in
;
1946 spp
->smk_out
= ssp
->smk_out
;
1950 * A NULL address is only used for updating existing
1951 * bound entries. If there isn't one, it's OK.
1956 addr6
= (struct sockaddr_in6
*)address
;
1957 port
= ntohs(addr6
->sin6_port
);
1959 * This is a special case that is safely ignored.
1965 * Look for an existing port list entry.
1966 * This is an indication that a port is getting reused.
1968 list_for_each_entry(spp
, &smk_ipv6_port_list
, list
) {
1969 if (spp
->smk_port
!= port
)
1971 spp
->smk_port
= port
;
1973 spp
->smk_in
= ssp
->smk_in
;
1974 spp
->smk_out
= ssp
->smk_out
;
1979 * A new port entry is required.
1981 spp
= kzalloc(sizeof(*spp
), GFP_KERNEL
);
1985 spp
->smk_port
= port
;
1987 spp
->smk_in
= ssp
->smk_in
;
1988 spp
->smk_out
= ssp
->smk_out
;
1990 list_add(&spp
->list
, &smk_ipv6_port_list
);
1995 * smk_ipv6_port_check - check Smack port access
1999 * Create or update the port list entry
2001 static int smk_ipv6_port_check(struct sock
*sk
, struct sockaddr
*address
,
2006 struct sockaddr_in6
*addr6
;
2007 struct smk_port_label
*spp
;
2008 struct socket_smack
*ssp
= sk
->sk_security
;
2009 struct smack_known
*skp
;
2010 unsigned short port
= 0;
2012 struct smk_audit_info ad
;
2014 struct lsm_network_audit net
;
2017 if (act
== SMK_RECEIVING
) {
2018 skp
= smack_net_ambient
;
2019 object
= ssp
->smk_in
;
2022 object
= smack_net_ambient
->smk_known
;
2026 * Get the IP address and port from the address.
2028 addr6
= (struct sockaddr_in6
*)address
;
2029 port
= ntohs(addr6
->sin6_port
);
2030 bep
= (__be16
*)(&addr6
->sin6_addr
);
2031 be32p
= (__be32
*)(&addr6
->sin6_addr
);
2034 * It's remote, so port lookup does no good.
2036 if (be32p
[0] || be32p
[1] || be32p
[2] || bep
[6] || ntohs(bep
[7]) != 1)
2040 * It's local so the send check has to have passed.
2042 if (act
== SMK_RECEIVING
) {
2043 skp
= &smack_known_web
;
2047 list_for_each_entry(spp
, &smk_ipv6_port_list
, list
) {
2048 if (spp
->smk_port
!= port
)
2050 object
= spp
->smk_in
;
2051 if (act
== SMK_CONNECTING
)
2052 ssp
->smk_packet
= spp
->smk_out
->smk_known
;
2059 smk_ad_init_net(&ad
, __func__
, LSM_AUDIT_DATA_NET
, &net
);
2060 ad
.a
.u
.net
->family
= sk
->sk_family
;
2061 ad
.a
.u
.net
->dport
= port
;
2062 if (act
== SMK_RECEIVING
)
2063 ad
.a
.u
.net
->v6info
.saddr
= addr6
->sin6_addr
;
2065 ad
.a
.u
.net
->v6info
.daddr
= addr6
->sin6_addr
;
2067 return smk_access(skp
, object
, MAY_WRITE
, &ad
);
2071 * smack_inode_setsecurity - set smack xattrs
2072 * @inode: the object
2073 * @name: attribute name
2074 * @value: attribute value
2075 * @size: size of the attribute
2078 * Sets the named attribute in the appropriate blob
2080 * Returns 0 on success, or an error code
2082 static int smack_inode_setsecurity(struct inode
*inode
, const char *name
,
2083 const void *value
, size_t size
, int flags
)
2085 struct smack_known
*skp
;
2086 struct inode_smack
*nsp
= inode
->i_security
;
2087 struct socket_smack
*ssp
;
2088 struct socket
*sock
;
2091 if (value
== NULL
|| size
> SMK_LONGLABEL
|| size
== 0)
2094 skp
= smk_import_entry(value
, size
);
2098 if (strcmp(name
, XATTR_SMACK_SUFFIX
) == 0) {
2099 nsp
->smk_inode
= skp
->smk_known
;
2100 nsp
->smk_flags
|= SMK_INODE_INSTANT
;
2104 * The rest of the Smack xattrs are only on sockets.
2106 if (inode
->i_sb
->s_magic
!= SOCKFS_MAGIC
)
2109 sock
= SOCKET_I(inode
);
2110 if (sock
== NULL
|| sock
->sk
== NULL
)
2113 ssp
= sock
->sk
->sk_security
;
2115 if (strcmp(name
, XATTR_SMACK_IPIN
) == 0)
2116 ssp
->smk_in
= skp
->smk_known
;
2117 else if (strcmp(name
, XATTR_SMACK_IPOUT
) == 0) {
2119 if (sock
->sk
->sk_family
== PF_INET
) {
2120 rc
= smack_netlabel(sock
->sk
, SMACK_CIPSO_SOCKET
);
2123 "Smack: \"%s\" netlbl error %d.\n",
2129 if (sock
->sk
->sk_family
== PF_INET6
)
2130 smk_ipv6_port_label(sock
, NULL
);
2136 * smack_socket_post_create - finish socket setup
2138 * @family: protocol family
2143 * Sets the netlabel information on the socket
2145 * Returns 0 on success, and error code otherwise
2147 static int smack_socket_post_create(struct socket
*sock
, int family
,
2148 int type
, int protocol
, int kern
)
2150 if (family
!= PF_INET
|| sock
->sk
== NULL
)
2153 * Set the outbound netlbl.
2155 return smack_netlabel(sock
->sk
, SMACK_CIPSO_SOCKET
);
2159 * smack_socket_bind - record port binding information.
2161 * @address: the port address
2162 * @addrlen: size of the address
2164 * Records the label bound to a port.
2168 static int smack_socket_bind(struct socket
*sock
, struct sockaddr
*address
,
2171 if (sock
->sk
!= NULL
&& sock
->sk
->sk_family
== PF_INET6
)
2172 smk_ipv6_port_label(sock
, address
);
2178 * smack_socket_connect - connect access check
2180 * @sap: the other end
2181 * @addrlen: size of sap
2183 * Verifies that a connection may be possible
2185 * Returns 0 on success, and error code otherwise
2187 static int smack_socket_connect(struct socket
*sock
, struct sockaddr
*sap
,
2192 if (sock
->sk
== NULL
)
2195 switch (sock
->sk
->sk_family
) {
2197 if (addrlen
< sizeof(struct sockaddr_in
))
2199 rc
= smack_netlabel_send(sock
->sk
, (struct sockaddr_in
*)sap
);
2202 if (addrlen
< sizeof(struct sockaddr_in6
))
2204 rc
= smk_ipv6_port_check(sock
->sk
, sap
, SMK_CONNECTING
);
2211 * smack_flags_to_may - convert S_ to MAY_ values
2212 * @flags: the S_ value
2214 * Returns the equivalent MAY_ value
2216 static int smack_flags_to_may(int flags
)
2220 if (flags
& S_IRUGO
)
2222 if (flags
& S_IWUGO
)
2224 if (flags
& S_IXUGO
)
2231 * smack_msg_msg_alloc_security - Set the security blob for msg_msg
2236 static int smack_msg_msg_alloc_security(struct msg_msg
*msg
)
2238 struct smack_known
*skp
= smk_of_current();
2240 msg
->security
= skp
->smk_known
;
2245 * smack_msg_msg_free_security - Clear the security blob for msg_msg
2248 * Clears the blob pointer
2250 static void smack_msg_msg_free_security(struct msg_msg
*msg
)
2252 msg
->security
= NULL
;
2256 * smack_of_shm - the smack pointer for the shm
2259 * Returns a pointer to the smack value
2261 static char *smack_of_shm(struct shmid_kernel
*shp
)
2263 return (char *)shp
->shm_perm
.security
;
2267 * smack_shm_alloc_security - Set the security blob for shm
2272 static int smack_shm_alloc_security(struct shmid_kernel
*shp
)
2274 struct kern_ipc_perm
*isp
= &shp
->shm_perm
;
2275 struct smack_known
*skp
= smk_of_current();
2277 isp
->security
= skp
->smk_known
;
2282 * smack_shm_free_security - Clear the security blob for shm
2285 * Clears the blob pointer
2287 static void smack_shm_free_security(struct shmid_kernel
*shp
)
2289 struct kern_ipc_perm
*isp
= &shp
->shm_perm
;
2291 isp
->security
= NULL
;
2295 * smk_curacc_shm : check if current has access on shm
2297 * @access : access requested
2299 * Returns 0 if current has the requested access, error code otherwise
2301 static int smk_curacc_shm(struct shmid_kernel
*shp
, int access
)
2303 char *ssp
= smack_of_shm(shp
);
2304 struct smk_audit_info ad
;
2307 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_IPC
);
2308 ad
.a
.u
.ipc_id
= shp
->shm_perm
.id
;
2310 return smk_curacc(ssp
, access
, &ad
);
2314 * smack_shm_associate - Smack access check for shm
2316 * @shmflg: access requested
2318 * Returns 0 if current has the requested access, error code otherwise
2320 static int smack_shm_associate(struct shmid_kernel
*shp
, int shmflg
)
2324 may
= smack_flags_to_may(shmflg
);
2325 return smk_curacc_shm(shp
, may
);
2329 * smack_shm_shmctl - Smack access check for shm
2331 * @cmd: what it wants to do
2333 * Returns 0 if current has the requested access, error code otherwise
2335 static int smack_shm_shmctl(struct shmid_kernel
*shp
, int cmd
)
2348 may
= MAY_READWRITE
;
2353 * System level information.
2359 return smk_curacc_shm(shp
, may
);
2363 * smack_shm_shmat - Smack access for shmat
2366 * @shmflg: access requested
2368 * Returns 0 if current has the requested access, error code otherwise
2370 static int smack_shm_shmat(struct shmid_kernel
*shp
, char __user
*shmaddr
,
2375 may
= smack_flags_to_may(shmflg
);
2376 return smk_curacc_shm(shp
, may
);
2380 * smack_of_sem - the smack pointer for the sem
2383 * Returns a pointer to the smack value
2385 static char *smack_of_sem(struct sem_array
*sma
)
2387 return (char *)sma
->sem_perm
.security
;
2391 * smack_sem_alloc_security - Set the security blob for sem
2396 static int smack_sem_alloc_security(struct sem_array
*sma
)
2398 struct kern_ipc_perm
*isp
= &sma
->sem_perm
;
2399 struct smack_known
*skp
= smk_of_current();
2401 isp
->security
= skp
->smk_known
;
2406 * smack_sem_free_security - Clear the security blob for sem
2409 * Clears the blob pointer
2411 static void smack_sem_free_security(struct sem_array
*sma
)
2413 struct kern_ipc_perm
*isp
= &sma
->sem_perm
;
2415 isp
->security
= NULL
;
2419 * smk_curacc_sem : check if current has access on sem
2421 * @access : access requested
2423 * Returns 0 if current has the requested access, error code otherwise
2425 static int smk_curacc_sem(struct sem_array
*sma
, int access
)
2427 char *ssp
= smack_of_sem(sma
);
2428 struct smk_audit_info ad
;
2431 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_IPC
);
2432 ad
.a
.u
.ipc_id
= sma
->sem_perm
.id
;
2434 return smk_curacc(ssp
, access
, &ad
);
2438 * smack_sem_associate - Smack access check for sem
2440 * @semflg: access requested
2442 * Returns 0 if current has the requested access, error code otherwise
2444 static int smack_sem_associate(struct sem_array
*sma
, int semflg
)
2448 may
= smack_flags_to_may(semflg
);
2449 return smk_curacc_sem(sma
, may
);
2453 * smack_sem_shmctl - Smack access check for sem
2455 * @cmd: what it wants to do
2457 * Returns 0 if current has the requested access, error code otherwise
2459 static int smack_sem_semctl(struct sem_array
*sma
, int cmd
)
2477 may
= MAY_READWRITE
;
2482 * System level information
2489 return smk_curacc_sem(sma
, may
);
2493 * smack_sem_semop - Smack checks of semaphore operations
2499 * Treated as read and write in all cases.
2501 * Returns 0 if access is allowed, error code otherwise
2503 static int smack_sem_semop(struct sem_array
*sma
, struct sembuf
*sops
,
2504 unsigned nsops
, int alter
)
2506 return smk_curacc_sem(sma
, MAY_READWRITE
);
2510 * smack_msg_alloc_security - Set the security blob for msg
2515 static int smack_msg_queue_alloc_security(struct msg_queue
*msq
)
2517 struct kern_ipc_perm
*kisp
= &msq
->q_perm
;
2518 struct smack_known
*skp
= smk_of_current();
2520 kisp
->security
= skp
->smk_known
;
2525 * smack_msg_free_security - Clear the security blob for msg
2528 * Clears the blob pointer
2530 static void smack_msg_queue_free_security(struct msg_queue
*msq
)
2532 struct kern_ipc_perm
*kisp
= &msq
->q_perm
;
2534 kisp
->security
= NULL
;
2538 * smack_of_msq - the smack pointer for the msq
2541 * Returns a pointer to the smack value
2543 static char *smack_of_msq(struct msg_queue
*msq
)
2545 return (char *)msq
->q_perm
.security
;
2549 * smk_curacc_msq : helper to check if current has access on msq
2551 * @access : access requested
2553 * return 0 if current has access, error otherwise
2555 static int smk_curacc_msq(struct msg_queue
*msq
, int access
)
2557 char *msp
= smack_of_msq(msq
);
2558 struct smk_audit_info ad
;
2561 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_IPC
);
2562 ad
.a
.u
.ipc_id
= msq
->q_perm
.id
;
2564 return smk_curacc(msp
, access
, &ad
);
2568 * smack_msg_queue_associate - Smack access check for msg_queue
2570 * @msqflg: access requested
2572 * Returns 0 if current has the requested access, error code otherwise
2574 static int smack_msg_queue_associate(struct msg_queue
*msq
, int msqflg
)
2578 may
= smack_flags_to_may(msqflg
);
2579 return smk_curacc_msq(msq
, may
);
2583 * smack_msg_queue_msgctl - Smack access check for msg_queue
2585 * @cmd: what it wants to do
2587 * Returns 0 if current has the requested access, error code otherwise
2589 static int smack_msg_queue_msgctl(struct msg_queue
*msq
, int cmd
)
2600 may
= MAY_READWRITE
;
2605 * System level information
2612 return smk_curacc_msq(msq
, may
);
2616 * smack_msg_queue_msgsnd - Smack access check for msg_queue
2619 * @msqflg: access requested
2621 * Returns 0 if current has the requested access, error code otherwise
2623 static int smack_msg_queue_msgsnd(struct msg_queue
*msq
, struct msg_msg
*msg
,
2628 may
= smack_flags_to_may(msqflg
);
2629 return smk_curacc_msq(msq
, may
);
2633 * smack_msg_queue_msgsnd - Smack access check for msg_queue
2640 * Returns 0 if current has read and write access, error code otherwise
2642 static int smack_msg_queue_msgrcv(struct msg_queue
*msq
, struct msg_msg
*msg
,
2643 struct task_struct
*target
, long type
, int mode
)
2645 return smk_curacc_msq(msq
, MAY_READWRITE
);
2649 * smack_ipc_permission - Smack access for ipc_permission()
2650 * @ipp: the object permissions
2651 * @flag: access requested
2653 * Returns 0 if current has read and write access, error code otherwise
2655 static int smack_ipc_permission(struct kern_ipc_perm
*ipp
, short flag
)
2657 char *isp
= ipp
->security
;
2658 int may
= smack_flags_to_may(flag
);
2659 struct smk_audit_info ad
;
2662 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_IPC
);
2663 ad
.a
.u
.ipc_id
= ipp
->id
;
2665 return smk_curacc(isp
, may
, &ad
);
2669 * smack_ipc_getsecid - Extract smack security id
2670 * @ipp: the object permissions
2671 * @secid: where result will be saved
2673 static void smack_ipc_getsecid(struct kern_ipc_perm
*ipp
, u32
*secid
)
2675 char *smack
= ipp
->security
;
2677 *secid
= smack_to_secid(smack
);
2681 * smack_d_instantiate - Make sure the blob is correct on an inode
2682 * @opt_dentry: dentry where inode will be attached
2683 * @inode: the object
2685 * Set the inode's security blob if it hasn't been done already.
2687 static void smack_d_instantiate(struct dentry
*opt_dentry
, struct inode
*inode
)
2689 struct super_block
*sbp
;
2690 struct superblock_smack
*sbsp
;
2691 struct inode_smack
*isp
;
2692 struct smack_known
*skp
;
2693 struct smack_known
*ckp
= smk_of_current();
2695 char trattr
[TRANS_TRUE_SIZE
];
2703 isp
= inode
->i_security
;
2705 mutex_lock(&isp
->smk_lock
);
2707 * If the inode is already instantiated
2708 * take the quick way out
2710 if (isp
->smk_flags
& SMK_INODE_INSTANT
)
2714 sbsp
= sbp
->s_security
;
2716 * We're going to use the superblock default label
2717 * if there's no label on the file.
2719 final
= sbsp
->smk_default
;
2722 * If this is the root inode the superblock
2723 * may be in the process of initialization.
2724 * If that is the case use the root value out
2725 * of the superblock.
2727 if (opt_dentry
->d_parent
== opt_dentry
) {
2728 isp
->smk_inode
= sbsp
->smk_root
;
2729 isp
->smk_flags
|= SMK_INODE_INSTANT
;
2734 * This is pretty hackish.
2735 * Casey says that we shouldn't have to do
2736 * file system specific code, but it does help
2737 * with keeping it simple.
2739 switch (sbp
->s_magic
) {
2742 * Casey says that it's a little embarrassing
2743 * that the smack file system doesn't do
2744 * extended attributes.
2746 final
= smack_known_star
.smk_known
;
2750 * Casey says pipes are easy (?)
2752 final
= smack_known_star
.smk_known
;
2754 case DEVPTS_SUPER_MAGIC
:
2756 * devpts seems content with the label of the task.
2757 * Programs that change smack have to treat the
2760 final
= ckp
->smk_known
;
2764 * Socket access is controlled by the socket
2765 * structures associated with the task involved.
2767 final
= smack_known_star
.smk_known
;
2769 case PROC_SUPER_MAGIC
:
2771 * Casey says procfs appears not to care.
2772 * The superblock default suffices.
2777 * Device labels should come from the filesystem,
2778 * but watch out, because they're volitile,
2779 * getting recreated on every reboot.
2781 final
= smack_known_star
.smk_known
;
2785 * If a smack value has been set we want to use it,
2786 * but since tmpfs isn't giving us the opportunity
2787 * to set mount options simulate setting the
2788 * superblock default.
2792 * This isn't an understood special case.
2793 * Get the value from the xattr.
2797 * UNIX domain sockets use lower level socket data.
2799 if (S_ISSOCK(inode
->i_mode
)) {
2800 final
= smack_known_star
.smk_known
;
2804 * No xattr support means, alas, no SMACK label.
2805 * Use the aforeapplied default.
2806 * It would be curious if the label of the task
2807 * does not match that assigned.
2809 if (inode
->i_op
->getxattr
== NULL
)
2812 * Get the dentry for xattr.
2814 dp
= dget(opt_dentry
);
2815 skp
= smk_fetch(XATTR_NAME_SMACK
, inode
, dp
);
2817 final
= skp
->smk_known
;
2820 * Transmuting directory
2822 if (S_ISDIR(inode
->i_mode
)) {
2824 * If this is a new directory and the label was
2825 * transmuted when the inode was initialized
2826 * set the transmute attribute on the directory
2827 * and mark the inode.
2829 * If there is a transmute attribute on the
2830 * directory mark the inode.
2832 if (isp
->smk_flags
& SMK_INODE_CHANGED
) {
2833 isp
->smk_flags
&= ~SMK_INODE_CHANGED
;
2834 rc
= inode
->i_op
->setxattr(dp
,
2835 XATTR_NAME_SMACKTRANSMUTE
,
2836 TRANS_TRUE
, TRANS_TRUE_SIZE
,
2839 rc
= inode
->i_op
->getxattr(dp
,
2840 XATTR_NAME_SMACKTRANSMUTE
, trattr
,
2842 if (rc
>= 0 && strncmp(trattr
, TRANS_TRUE
,
2843 TRANS_TRUE_SIZE
) != 0)
2847 transflag
= SMK_INODE_TRANSMUTE
;
2849 isp
->smk_task
= smk_fetch(XATTR_NAME_SMACKEXEC
, inode
, dp
);
2850 isp
->smk_mmap
= smk_fetch(XATTR_NAME_SMACKMMAP
, inode
, dp
);
2857 isp
->smk_inode
= ckp
->smk_known
;
2859 isp
->smk_inode
= final
;
2861 isp
->smk_flags
|= (SMK_INODE_INSTANT
| transflag
);
2864 mutex_unlock(&isp
->smk_lock
);
2869 * smack_getprocattr - Smack process attribute access
2870 * @p: the object task
2871 * @name: the name of the attribute in /proc/.../attr
2872 * @value: where to put the result
2874 * Places a copy of the task Smack into value
2876 * Returns the length of the smack label or an error code
2878 static int smack_getprocattr(struct task_struct
*p
, char *name
, char **value
)
2880 struct smack_known
*skp
= smk_of_task(task_security(p
));
2884 if (strcmp(name
, "current") != 0)
2887 cp
= kstrdup(skp
->smk_known
, GFP_KERNEL
);
2897 * smack_setprocattr - Smack process attribute setting
2898 * @p: the object task
2899 * @name: the name of the attribute in /proc/.../attr
2900 * @value: the value to set
2901 * @size: the size of the value
2903 * Sets the Smack value of the task. Only setting self
2904 * is permitted and only with privilege
2906 * Returns the length of the smack label or an error code
2908 static int smack_setprocattr(struct task_struct
*p
, char *name
,
2909 void *value
, size_t size
)
2911 struct task_smack
*tsp
;
2913 struct smack_known
*skp
;
2916 * Changing another process' Smack value is too dangerous
2917 * and supports no sane use case.
2922 if (!smack_privileged(CAP_MAC_ADMIN
))
2925 if (value
== NULL
|| size
== 0 || size
>= SMK_LONGLABEL
)
2928 if (strcmp(name
, "current") != 0)
2931 skp
= smk_import_entry(value
, size
);
2936 * No process is ever allowed the web ("@") label.
2938 if (skp
== &smack_known_web
)
2941 new = prepare_creds();
2945 tsp
= new->security
;
2946 tsp
->smk_task
= skp
;
2953 * smack_unix_stream_connect - Smack access on UDS
2955 * @other: the other sock
2958 * Return 0 if a subject with the smack of sock could access
2959 * an object with the smack of other, otherwise an error code
2961 static int smack_unix_stream_connect(struct sock
*sock
,
2962 struct sock
*other
, struct sock
*newsk
)
2964 struct smack_known
*skp
;
2965 struct socket_smack
*ssp
= sock
->sk_security
;
2966 struct socket_smack
*osp
= other
->sk_security
;
2967 struct socket_smack
*nsp
= newsk
->sk_security
;
2968 struct smk_audit_info ad
;
2972 struct lsm_network_audit net
;
2974 smk_ad_init_net(&ad
, __func__
, LSM_AUDIT_DATA_NET
, &net
);
2975 smk_ad_setfield_u_net_sk(&ad
, other
);
2978 if (!smack_privileged(CAP_MAC_OVERRIDE
)) {
2980 rc
= smk_access(skp
, osp
->smk_in
, MAY_WRITE
, &ad
);
2984 * Cross reference the peer labels for SO_PEERSEC.
2987 nsp
->smk_packet
= ssp
->smk_out
->smk_known
;
2988 ssp
->smk_packet
= osp
->smk_out
->smk_known
;
2995 * smack_unix_may_send - Smack access on UDS
2997 * @other: the other socket
2999 * Return 0 if a subject with the smack of sock could access
3000 * an object with the smack of other, otherwise an error code
3002 static int smack_unix_may_send(struct socket
*sock
, struct socket
*other
)
3004 struct socket_smack
*ssp
= sock
->sk
->sk_security
;
3005 struct socket_smack
*osp
= other
->sk
->sk_security
;
3006 struct smack_known
*skp
;
3007 struct smk_audit_info ad
;
3010 struct lsm_network_audit net
;
3012 smk_ad_init_net(&ad
, __func__
, LSM_AUDIT_DATA_NET
, &net
);
3013 smk_ad_setfield_u_net_sk(&ad
, other
->sk
);
3016 if (smack_privileged(CAP_MAC_OVERRIDE
))
3020 return smk_access(skp
, osp
->smk_in
, MAY_WRITE
, &ad
);
3024 * smack_socket_sendmsg - Smack check based on destination host
3027 * @size: the size of the message
3029 * Return 0 if the current subject can write to the destination host.
3030 * For IPv4 this is only a question if the destination is a single label host.
3031 * For IPv6 this is a check against the label of the port.
3033 static int smack_socket_sendmsg(struct socket
*sock
, struct msghdr
*msg
,
3036 struct sockaddr_in
*sip
= (struct sockaddr_in
*) msg
->msg_name
;
3037 struct sockaddr
*sap
= (struct sockaddr
*) msg
->msg_name
;
3041 * Perfectly reasonable for this to be NULL
3046 switch (sip
->sin_family
) {
3048 rc
= smack_netlabel_send(sock
->sk
, sip
);
3051 rc
= smk_ipv6_port_check(sock
->sk
, sap
, SMK_SENDING
);
3058 * smack_from_secattr - Convert a netlabel attr.mls.lvl/attr.mls.cat pair to smack
3059 * @sap: netlabel secattr
3060 * @ssp: socket security information
3062 * Returns a pointer to a Smack label entry found on the label list.
3064 static struct smack_known
*smack_from_secattr(struct netlbl_lsm_secattr
*sap
,
3065 struct socket_smack
*ssp
)
3067 struct smack_known
*skp
;
3070 if ((sap
->flags
& NETLBL_SECATTR_MLS_LVL
) != 0) {
3072 * Looks like a CIPSO packet.
3073 * If there are flags but no level netlabel isn't
3074 * behaving the way we expect it to.
3076 * Look it up in the label table
3077 * Without guidance regarding the smack value
3078 * for the packet fall back on the network
3082 list_for_each_entry(skp
, &smack_known_list
, list
) {
3083 if (sap
->attr
.mls
.lvl
!= skp
->smk_netlabel
.attr
.mls
.lvl
)
3085 if (memcmp(sap
->attr
.mls
.cat
,
3086 skp
->smk_netlabel
.attr
.mls
.cat
,
3097 if (ssp
!= NULL
&& ssp
->smk_in
== smack_known_star
.smk_known
)
3098 return &smack_known_web
;
3099 return &smack_known_star
;
3101 if ((sap
->flags
& NETLBL_SECATTR_SECID
) != 0) {
3103 * Looks like a fallback, which gives us a secid.
3105 skp
= smack_from_secid(sap
->attr
.secid
);
3107 * This has got to be a bug because it is
3108 * impossible to specify a fallback without
3109 * specifying the label, which will ensure
3110 * it has a secid, and the only way to get a
3111 * secid is from a fallback.
3113 BUG_ON(skp
== NULL
);
3117 * Without guidance regarding the smack value
3118 * for the packet fall back on the network
3121 return smack_net_ambient
;
3124 static int smk_skb_to_addr_ipv6(struct sk_buff
*skb
, struct sockaddr
*sap
)
3126 struct sockaddr_in6
*sip
= (struct sockaddr_in6
*)sap
;
3129 int proto
= -EINVAL
;
3130 struct ipv6hdr _ipv6h
;
3131 struct ipv6hdr
*ip6
;
3133 struct tcphdr _tcph
, *th
;
3134 struct udphdr _udph
, *uh
;
3135 struct dccp_hdr _dccph
, *dh
;
3139 offset
= skb_network_offset(skb
);
3140 ip6
= skb_header_pointer(skb
, offset
, sizeof(_ipv6h
), &_ipv6h
);
3143 sip
->sin6_addr
= ip6
->saddr
;
3145 nexthdr
= ip6
->nexthdr
;
3146 offset
+= sizeof(_ipv6h
);
3147 offset
= ipv6_skip_exthdr(skb
, offset
, &nexthdr
, &frag_off
);
3154 th
= skb_header_pointer(skb
, offset
, sizeof(_tcph
), &_tcph
);
3156 sip
->sin6_port
= th
->source
;
3159 uh
= skb_header_pointer(skb
, offset
, sizeof(_udph
), &_udph
);
3161 sip
->sin6_port
= uh
->source
;
3164 dh
= skb_header_pointer(skb
, offset
, sizeof(_dccph
), &_dccph
);
3166 sip
->sin6_port
= dh
->dccph_sport
;
3173 * smack_socket_sock_rcv_skb - Smack packet delivery access check
3177 * Returns 0 if the packet should be delivered, an error code otherwise
3179 static int smack_socket_sock_rcv_skb(struct sock
*sk
, struct sk_buff
*skb
)
3181 struct netlbl_lsm_secattr secattr
;
3182 struct socket_smack
*ssp
= sk
->sk_security
;
3183 struct smack_known
*skp
;
3184 struct sockaddr sadd
;
3186 struct smk_audit_info ad
;
3188 struct lsm_network_audit net
;
3190 switch (sk
->sk_family
) {
3193 * Translate what netlabel gave us.
3195 netlbl_secattr_init(&secattr
);
3197 rc
= netlbl_skbuff_getattr(skb
, sk
->sk_family
, &secattr
);
3199 skp
= smack_from_secattr(&secattr
, ssp
);
3201 skp
= smack_net_ambient
;
3203 netlbl_secattr_destroy(&secattr
);
3206 smk_ad_init_net(&ad
, __func__
, LSM_AUDIT_DATA_NET
, &net
);
3207 ad
.a
.u
.net
->family
= sk
->sk_family
;
3208 ad
.a
.u
.net
->netif
= skb
->skb_iif
;
3209 ipv4_skb_to_auditdata(skb
, &ad
.a
, NULL
);
3212 * Receiving a packet requires that the other end
3213 * be able to write here. Read access is not required.
3214 * This is the simplist possible security model
3217 rc
= smk_access(skp
, ssp
->smk_in
, MAY_WRITE
, &ad
);
3219 netlbl_skbuff_err(skb
, rc
, 0);
3222 rc
= smk_skb_to_addr_ipv6(skb
, &sadd
);
3223 if (rc
== IPPROTO_UDP
|| rc
== IPPROTO_TCP
)
3224 rc
= smk_ipv6_port_check(sk
, &sadd
, SMK_RECEIVING
);
3233 * smack_socket_getpeersec_stream - pull in packet label
3235 * @optval: user's destination
3236 * @optlen: size thereof
3239 * returns zero on success, an error code otherwise
3241 static int smack_socket_getpeersec_stream(struct socket
*sock
,
3242 char __user
*optval
,
3243 int __user
*optlen
, unsigned len
)
3245 struct socket_smack
*ssp
;
3250 ssp
= sock
->sk
->sk_security
;
3251 if (ssp
->smk_packet
!= NULL
) {
3252 rcp
= ssp
->smk_packet
;
3253 slen
= strlen(rcp
) + 1;
3258 else if (copy_to_user(optval
, rcp
, slen
) != 0)
3261 if (put_user(slen
, optlen
) != 0)
3269 * smack_socket_getpeersec_dgram - pull in packet label
3270 * @sock: the peer socket
3272 * @secid: pointer to where to put the secid of the packet
3274 * Sets the netlabel socket state on sk from parent
3276 static int smack_socket_getpeersec_dgram(struct socket
*sock
,
3277 struct sk_buff
*skb
, u32
*secid
)
3280 struct netlbl_lsm_secattr secattr
;
3281 struct socket_smack
*ssp
= NULL
;
3282 struct smack_known
*skp
;
3283 int family
= PF_UNSPEC
;
3284 u32 s
= 0; /* 0 is the invalid secid */
3288 if (skb
->protocol
== htons(ETH_P_IP
))
3290 else if (skb
->protocol
== htons(ETH_P_IPV6
))
3293 if (family
== PF_UNSPEC
&& sock
!= NULL
)
3294 family
= sock
->sk
->sk_family
;
3296 if (family
== PF_UNIX
) {
3297 ssp
= sock
->sk
->sk_security
;
3298 s
= ssp
->smk_out
->smk_secid
;
3299 } else if (family
== PF_INET
|| family
== PF_INET6
) {
3301 * Translate what netlabel gave us.
3303 if (sock
!= NULL
&& sock
->sk
!= NULL
)
3304 ssp
= sock
->sk
->sk_security
;
3305 netlbl_secattr_init(&secattr
);
3306 rc
= netlbl_skbuff_getattr(skb
, family
, &secattr
);
3308 skp
= smack_from_secattr(&secattr
, ssp
);
3311 netlbl_secattr_destroy(&secattr
);
3320 * smack_sock_graft - Initialize a newly created socket with an existing sock
3322 * @parent: parent socket
3324 * Set the smk_{in,out} state of an existing sock based on the process that
3325 * is creating the new socket.
3327 static void smack_sock_graft(struct sock
*sk
, struct socket
*parent
)
3329 struct socket_smack
*ssp
;
3330 struct smack_known
*skp
= smk_of_current();
3333 (sk
->sk_family
!= PF_INET
&& sk
->sk_family
!= PF_INET6
))
3336 ssp
= sk
->sk_security
;
3337 ssp
->smk_in
= skp
->smk_known
;
3339 /* cssp->smk_packet is already set in smack_inet_csk_clone() */
3343 * smack_inet_conn_request - Smack access check on connect
3344 * @sk: socket involved
3348 * Returns 0 if a task with the packet label could write to
3349 * the socket, otherwise an error code
3351 static int smack_inet_conn_request(struct sock
*sk
, struct sk_buff
*skb
,
3352 struct request_sock
*req
)
3354 u16 family
= sk
->sk_family
;
3355 struct smack_known
*skp
;
3356 struct socket_smack
*ssp
= sk
->sk_security
;
3357 struct netlbl_lsm_secattr secattr
;
3358 struct sockaddr_in addr
;
3362 struct smk_audit_info ad
;
3364 struct lsm_network_audit net
;
3367 if (family
== PF_INET6
) {
3369 * Handle mapped IPv4 packets arriving
3370 * via IPv6 sockets. Don't set up netlabel
3371 * processing on IPv6.
3373 if (skb
->protocol
== htons(ETH_P_IP
))
3379 netlbl_secattr_init(&secattr
);
3380 rc
= netlbl_skbuff_getattr(skb
, family
, &secattr
);
3382 skp
= smack_from_secattr(&secattr
, ssp
);
3384 skp
= &smack_known_huh
;
3385 netlbl_secattr_destroy(&secattr
);
3388 smk_ad_init_net(&ad
, __func__
, LSM_AUDIT_DATA_NET
, &net
);
3389 ad
.a
.u
.net
->family
= family
;
3390 ad
.a
.u
.net
->netif
= skb
->skb_iif
;
3391 ipv4_skb_to_auditdata(skb
, &ad
.a
, NULL
);
3394 * Receiving a packet requires that the other end be able to write
3395 * here. Read access is not required.
3397 rc
= smk_access(skp
, ssp
->smk_in
, MAY_WRITE
, &ad
);
3402 * Save the peer's label in the request_sock so we can later setup
3403 * smk_packet in the child socket so that SO_PEERCRED can report it.
3405 req
->peer_secid
= skp
->smk_secid
;
3408 * We need to decide if we want to label the incoming connection here
3409 * if we do we only need to label the request_sock and the stack will
3410 * propagate the wire-label to the sock when it is created.
3413 addr
.sin_addr
.s_addr
= hdr
->saddr
;
3415 hsp
= smack_host_label(&addr
);
3419 rc
= netlbl_req_setattr(req
, &skp
->smk_netlabel
);
3421 netlbl_req_delattr(req
);
3427 * smack_inet_csk_clone - Copy the connection information to the new socket
3428 * @sk: the new socket
3429 * @req: the connection's request_sock
3431 * Transfer the connection's peer label to the newly created socket.
3433 static void smack_inet_csk_clone(struct sock
*sk
,
3434 const struct request_sock
*req
)
3436 struct socket_smack
*ssp
= sk
->sk_security
;
3437 struct smack_known
*skp
;
3439 if (req
->peer_secid
!= 0) {
3440 skp
= smack_from_secid(req
->peer_secid
);
3441 ssp
->smk_packet
= skp
->smk_known
;
3443 ssp
->smk_packet
= NULL
;
3447 * Key management security hooks
3449 * Casey has not tested key support very heavily.
3450 * The permission check is most likely too restrictive.
3451 * If you care about keys please have a look.
3456 * smack_key_alloc - Set the key security blob
3458 * @cred: the credentials to use
3461 * No allocation required
3465 static int smack_key_alloc(struct key
*key
, const struct cred
*cred
,
3466 unsigned long flags
)
3468 struct smack_known
*skp
= smk_of_task(cred
->security
);
3470 key
->security
= skp
->smk_known
;
3475 * smack_key_free - Clear the key security blob
3478 * Clear the blob pointer
3480 static void smack_key_free(struct key
*key
)
3482 key
->security
= NULL
;
3486 * smack_key_permission - Smack access on a key
3487 * @key_ref: gets to the object
3488 * @cred: the credentials to use
3491 * Return 0 if the task has read and write to the object,
3492 * an error code otherwise
3494 static int smack_key_permission(key_ref_t key_ref
,
3495 const struct cred
*cred
, key_perm_t perm
)
3498 struct smk_audit_info ad
;
3499 struct smack_known
*tkp
= smk_of_task(cred
->security
);
3501 keyp
= key_ref_to_ptr(key_ref
);
3505 * If the key hasn't been initialized give it access so that
3508 if (keyp
->security
== NULL
)
3511 * This should not occur
3516 smk_ad_init(&ad
, __func__
, LSM_AUDIT_DATA_KEY
);
3517 ad
.a
.u
.key_struct
.key
= keyp
->serial
;
3518 ad
.a
.u
.key_struct
.key_desc
= keyp
->description
;
3520 return smk_access(tkp
, keyp
->security
, MAY_READWRITE
, &ad
);
3522 #endif /* CONFIG_KEYS */
3527 * Audit requires a unique representation of each Smack specific
3528 * rule. This unique representation is used to distinguish the
3529 * object to be audited from remaining kernel objects and also
3530 * works as a glue between the audit hooks.
3532 * Since repository entries are added but never deleted, we'll use
3533 * the smack_known label address related to the given audit rule as
3534 * the needed unique representation. This also better fits the smack
3535 * model where nearly everything is a label.
3540 * smack_audit_rule_init - Initialize a smack audit rule
3541 * @field: audit rule fields given from user-space (audit.h)
3542 * @op: required testing operator (=, !=, >, <, ...)
3543 * @rulestr: smack label to be audited
3544 * @vrule: pointer to save our own audit rule representation
3546 * Prepare to audit cases where (@field @op @rulestr) is true.
3547 * The label to be audited is created if necessay.
3549 static int smack_audit_rule_init(u32 field
, u32 op
, char *rulestr
, void **vrule
)
3551 char **rule
= (char **)vrule
;
3554 if (field
!= AUDIT_SUBJ_USER
&& field
!= AUDIT_OBJ_USER
)
3557 if (op
!= Audit_equal
&& op
!= Audit_not_equal
)
3560 *rule
= smk_import(rulestr
, 0);
3566 * smack_audit_rule_known - Distinguish Smack audit rules
3567 * @krule: rule of interest, in Audit kernel representation format
3569 * This is used to filter Smack rules from remaining Audit ones.
3570 * If it's proved that this rule belongs to us, the
3571 * audit_rule_match hook will be called to do the final judgement.
3573 static int smack_audit_rule_known(struct audit_krule
*krule
)
3575 struct audit_field
*f
;
3578 for (i
= 0; i
< krule
->field_count
; i
++) {
3579 f
= &krule
->fields
[i
];
3581 if (f
->type
== AUDIT_SUBJ_USER
|| f
->type
== AUDIT_OBJ_USER
)
3589 * smack_audit_rule_match - Audit given object ?
3590 * @secid: security id for identifying the object to test
3591 * @field: audit rule flags given from user-space
3592 * @op: required testing operator
3593 * @vrule: smack internal rule presentation
3594 * @actx: audit context associated with the check
3596 * The core Audit hook. It's used to take the decision of
3597 * whether to audit or not to audit a given object.
3599 static int smack_audit_rule_match(u32 secid
, u32 field
, u32 op
, void *vrule
,
3600 struct audit_context
*actx
)
3602 struct smack_known
*skp
;
3606 audit_log(actx
, GFP_ATOMIC
, AUDIT_SELINUX_ERR
,
3607 "Smack: missing rule\n");
3611 if (field
!= AUDIT_SUBJ_USER
&& field
!= AUDIT_OBJ_USER
)
3614 skp
= smack_from_secid(secid
);
3617 * No need to do string comparisons. If a match occurs,
3618 * both pointers will point to the same smack_known
3621 if (op
== Audit_equal
)
3622 return (rule
== skp
->smk_known
);
3623 if (op
== Audit_not_equal
)
3624 return (rule
!= skp
->smk_known
);
3630 * smack_audit_rule_free - free smack rule representation
3631 * @vrule: rule to be freed.
3633 * No memory was allocated.
3635 static void smack_audit_rule_free(void *vrule
)
3640 #endif /* CONFIG_AUDIT */
3643 * smack_ismaclabel - check if xattr @name references a smack MAC label
3644 * @name: Full xattr name to check.
3646 static int smack_ismaclabel(const char *name
)
3648 return (strcmp(name
, XATTR_SMACK_SUFFIX
) == 0);
3653 * smack_secid_to_secctx - return the smack label for a secid
3654 * @secid: incoming integer
3655 * @secdata: destination
3656 * @seclen: how long it is
3658 * Exists for networking code.
3660 static int smack_secid_to_secctx(u32 secid
, char **secdata
, u32
*seclen
)
3662 struct smack_known
*skp
= smack_from_secid(secid
);
3665 *secdata
= skp
->smk_known
;
3666 *seclen
= strlen(skp
->smk_known
);
3671 * smack_secctx_to_secid - return the secid for a smack label
3672 * @secdata: smack label
3673 * @seclen: how long result is
3674 * @secid: outgoing integer
3676 * Exists for audit and networking code.
3678 static int smack_secctx_to_secid(const char *secdata
, u32 seclen
, u32
*secid
)
3680 *secid
= smack_to_secid(secdata
);
3685 * smack_release_secctx - don't do anything.
3689 * Exists to make sure nothing gets done, and properly
3691 static void smack_release_secctx(char *secdata
, u32 seclen
)
3695 static int smack_inode_notifysecctx(struct inode
*inode
, void *ctx
, u32 ctxlen
)
3697 return smack_inode_setsecurity(inode
, XATTR_SMACK_SUFFIX
, ctx
, ctxlen
, 0);
3700 static int smack_inode_setsecctx(struct dentry
*dentry
, void *ctx
, u32 ctxlen
)
3702 return __vfs_setxattr_noperm(dentry
, XATTR_NAME_SMACK
, ctx
, ctxlen
, 0);
3705 static int smack_inode_getsecctx(struct inode
*inode
, void **ctx
, u32
*ctxlen
)
3708 len
= smack_inode_getsecurity(inode
, XATTR_SMACK_SUFFIX
, ctx
, true);
3716 struct security_operations smack_ops
= {
3719 .ptrace_access_check
= smack_ptrace_access_check
,
3720 .ptrace_traceme
= smack_ptrace_traceme
,
3721 .syslog
= smack_syslog
,
3723 .sb_alloc_security
= smack_sb_alloc_security
,
3724 .sb_free_security
= smack_sb_free_security
,
3725 .sb_copy_data
= smack_sb_copy_data
,
3726 .sb_kern_mount
= smack_sb_kern_mount
,
3727 .sb_statfs
= smack_sb_statfs
,
3728 .sb_mount
= smack_sb_mount
,
3729 .sb_umount
= smack_sb_umount
,
3731 .bprm_set_creds
= smack_bprm_set_creds
,
3732 .bprm_committing_creds
= smack_bprm_committing_creds
,
3733 .bprm_secureexec
= smack_bprm_secureexec
,
3735 .inode_alloc_security
= smack_inode_alloc_security
,
3736 .inode_free_security
= smack_inode_free_security
,
3737 .inode_init_security
= smack_inode_init_security
,
3738 .inode_link
= smack_inode_link
,
3739 .inode_unlink
= smack_inode_unlink
,
3740 .inode_rmdir
= smack_inode_rmdir
,
3741 .inode_rename
= smack_inode_rename
,
3742 .inode_permission
= smack_inode_permission
,
3743 .inode_setattr
= smack_inode_setattr
,
3744 .inode_getattr
= smack_inode_getattr
,
3745 .inode_setxattr
= smack_inode_setxattr
,
3746 .inode_post_setxattr
= smack_inode_post_setxattr
,
3747 .inode_getxattr
= smack_inode_getxattr
,
3748 .inode_removexattr
= smack_inode_removexattr
,
3749 .inode_getsecurity
= smack_inode_getsecurity
,
3750 .inode_setsecurity
= smack_inode_setsecurity
,
3751 .inode_listsecurity
= smack_inode_listsecurity
,
3752 .inode_getsecid
= smack_inode_getsecid
,
3754 .file_permission
= smack_file_permission
,
3755 .file_alloc_security
= smack_file_alloc_security
,
3756 .file_free_security
= smack_file_free_security
,
3757 .file_ioctl
= smack_file_ioctl
,
3758 .file_lock
= smack_file_lock
,
3759 .file_fcntl
= smack_file_fcntl
,
3760 .mmap_file
= smack_mmap_file
,
3761 .mmap_addr
= cap_mmap_addr
,
3762 .file_set_fowner
= smack_file_set_fowner
,
3763 .file_send_sigiotask
= smack_file_send_sigiotask
,
3764 .file_receive
= smack_file_receive
,
3766 .file_open
= smack_file_open
,
3768 .cred_alloc_blank
= smack_cred_alloc_blank
,
3769 .cred_free
= smack_cred_free
,
3770 .cred_prepare
= smack_cred_prepare
,
3771 .cred_transfer
= smack_cred_transfer
,
3772 .kernel_act_as
= smack_kernel_act_as
,
3773 .kernel_create_files_as
= smack_kernel_create_files_as
,
3774 .task_setpgid
= smack_task_setpgid
,
3775 .task_getpgid
= smack_task_getpgid
,
3776 .task_getsid
= smack_task_getsid
,
3777 .task_getsecid
= smack_task_getsecid
,
3778 .task_setnice
= smack_task_setnice
,
3779 .task_setioprio
= smack_task_setioprio
,
3780 .task_getioprio
= smack_task_getioprio
,
3781 .task_setscheduler
= smack_task_setscheduler
,
3782 .task_getscheduler
= smack_task_getscheduler
,
3783 .task_movememory
= smack_task_movememory
,
3784 .task_kill
= smack_task_kill
,
3785 .task_wait
= smack_task_wait
,
3786 .task_to_inode
= smack_task_to_inode
,
3788 .ipc_permission
= smack_ipc_permission
,
3789 .ipc_getsecid
= smack_ipc_getsecid
,
3791 .msg_msg_alloc_security
= smack_msg_msg_alloc_security
,
3792 .msg_msg_free_security
= smack_msg_msg_free_security
,
3794 .msg_queue_alloc_security
= smack_msg_queue_alloc_security
,
3795 .msg_queue_free_security
= smack_msg_queue_free_security
,
3796 .msg_queue_associate
= smack_msg_queue_associate
,
3797 .msg_queue_msgctl
= smack_msg_queue_msgctl
,
3798 .msg_queue_msgsnd
= smack_msg_queue_msgsnd
,
3799 .msg_queue_msgrcv
= smack_msg_queue_msgrcv
,
3801 .shm_alloc_security
= smack_shm_alloc_security
,
3802 .shm_free_security
= smack_shm_free_security
,
3803 .shm_associate
= smack_shm_associate
,
3804 .shm_shmctl
= smack_shm_shmctl
,
3805 .shm_shmat
= smack_shm_shmat
,
3807 .sem_alloc_security
= smack_sem_alloc_security
,
3808 .sem_free_security
= smack_sem_free_security
,
3809 .sem_associate
= smack_sem_associate
,
3810 .sem_semctl
= smack_sem_semctl
,
3811 .sem_semop
= smack_sem_semop
,
3813 .d_instantiate
= smack_d_instantiate
,
3815 .getprocattr
= smack_getprocattr
,
3816 .setprocattr
= smack_setprocattr
,
3818 .unix_stream_connect
= smack_unix_stream_connect
,
3819 .unix_may_send
= smack_unix_may_send
,
3821 .socket_post_create
= smack_socket_post_create
,
3822 .socket_bind
= smack_socket_bind
,
3823 .socket_connect
= smack_socket_connect
,
3824 .socket_sendmsg
= smack_socket_sendmsg
,
3825 .socket_sock_rcv_skb
= smack_socket_sock_rcv_skb
,
3826 .socket_getpeersec_stream
= smack_socket_getpeersec_stream
,
3827 .socket_getpeersec_dgram
= smack_socket_getpeersec_dgram
,
3828 .sk_alloc_security
= smack_sk_alloc_security
,
3829 .sk_free_security
= smack_sk_free_security
,
3830 .sock_graft
= smack_sock_graft
,
3831 .inet_conn_request
= smack_inet_conn_request
,
3832 .inet_csk_clone
= smack_inet_csk_clone
,
3834 /* key management security hooks */
3836 .key_alloc
= smack_key_alloc
,
3837 .key_free
= smack_key_free
,
3838 .key_permission
= smack_key_permission
,
3839 #endif /* CONFIG_KEYS */
3843 .audit_rule_init
= smack_audit_rule_init
,
3844 .audit_rule_known
= smack_audit_rule_known
,
3845 .audit_rule_match
= smack_audit_rule_match
,
3846 .audit_rule_free
= smack_audit_rule_free
,
3847 #endif /* CONFIG_AUDIT */
3849 .ismaclabel
= smack_ismaclabel
,
3850 .secid_to_secctx
= smack_secid_to_secctx
,
3851 .secctx_to_secid
= smack_secctx_to_secid
,
3852 .release_secctx
= smack_release_secctx
,
3853 .inode_notifysecctx
= smack_inode_notifysecctx
,
3854 .inode_setsecctx
= smack_inode_setsecctx
,
3855 .inode_getsecctx
= smack_inode_getsecctx
,
3859 static __init
void init_smack_known_list(void)
3862 * Initialize rule list locks
3864 mutex_init(&smack_known_huh
.smk_rules_lock
);
3865 mutex_init(&smack_known_hat
.smk_rules_lock
);
3866 mutex_init(&smack_known_floor
.smk_rules_lock
);
3867 mutex_init(&smack_known_star
.smk_rules_lock
);
3868 mutex_init(&smack_known_invalid
.smk_rules_lock
);
3869 mutex_init(&smack_known_web
.smk_rules_lock
);
3871 * Initialize rule lists
3873 INIT_LIST_HEAD(&smack_known_huh
.smk_rules
);
3874 INIT_LIST_HEAD(&smack_known_hat
.smk_rules
);
3875 INIT_LIST_HEAD(&smack_known_star
.smk_rules
);
3876 INIT_LIST_HEAD(&smack_known_floor
.smk_rules
);
3877 INIT_LIST_HEAD(&smack_known_invalid
.smk_rules
);
3878 INIT_LIST_HEAD(&smack_known_web
.smk_rules
);
3880 * Create the known labels list
3882 list_add(&smack_known_huh
.list
, &smack_known_list
);
3883 list_add(&smack_known_hat
.list
, &smack_known_list
);
3884 list_add(&smack_known_star
.list
, &smack_known_list
);
3885 list_add(&smack_known_floor
.list
, &smack_known_list
);
3886 list_add(&smack_known_invalid
.list
, &smack_known_list
);
3887 list_add(&smack_known_web
.list
, &smack_known_list
);
3891 * smack_init - initialize the smack system
3895 static __init
int smack_init(void)
3898 struct task_smack
*tsp
;
3900 if (!security_module_enable(&smack_ops
))
3903 tsp
= new_task_smack(&smack_known_floor
, &smack_known_floor
,
3908 printk(KERN_INFO
"Smack: Initializing.\n");
3911 * Set the security state for the initial task.
3913 cred
= (struct cred
*) current
->cred
;
3914 cred
->security
= tsp
;
3916 /* initialize the smack_known_list */
3917 init_smack_known_list();
3922 if (register_security(&smack_ops
))
3923 panic("smack: Unable to register with kernel.\n");
3929 * Smack requires early initialization in order to label
3930 * all processes and objects when they are created.
3932 security_initcall(smack_init
);