1 /* keyctl.c: userspace keyctl operations
3 * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/sched.h>
15 #include <linux/slab.h>
16 #include <linux/syscalls.h>
17 #include <linux/keyctl.h>
19 #include <linux/capability.h>
20 #include <linux/err.h>
21 #include <asm/uaccess.h>
24 /*****************************************************************************/
26 * extract the description of a new key from userspace and either add it as a
27 * new key to the specified keyring or update a matching key in that keyring
28 * - the keyring must be writable
29 * - returns the new key's serial number
30 * - implements add_key()
32 asmlinkage
long sys_add_key(const char __user
*_type
,
33 const char __user
*_description
,
34 const void __user
*_payload
,
38 key_ref_t keyring_ref
, key_ref
;
39 char type
[32], *description
;
47 /* draw all the data into kernel space */
48 ret
= strncpy_from_user(type
, _type
, sizeof(type
) - 1);
58 dlen
= strnlen_user(_description
, PAGE_SIZE
- 1);
63 if (dlen
> PAGE_SIZE
- 1)
67 description
= kmalloc(dlen
+ 1, GFP_KERNEL
);
72 if (copy_from_user(description
, _description
, dlen
+ 1) != 0)
75 /* pull the payload in if one was supplied */
80 payload
= kmalloc(plen
, GFP_KERNEL
);
85 if (copy_from_user(payload
, _payload
, plen
) != 0)
89 /* find the target keyring (which must be writable) */
90 keyring_ref
= lookup_user_key(NULL
, ringid
, 1, 0, KEY_WRITE
);
91 if (IS_ERR(keyring_ref
)) {
92 ret
= PTR_ERR(keyring_ref
);
96 /* create or update the requested key and add it to the target
98 key_ref
= key_create_or_update(keyring_ref
, type
, description
,
100 if (!IS_ERR(key_ref
)) {
101 ret
= key_ref_to_ptr(key_ref
)->serial
;
102 key_ref_put(key_ref
);
105 ret
= PTR_ERR(key_ref
);
108 key_ref_put(keyring_ref
);
116 } /* end sys_add_key() */
118 /*****************************************************************************/
120 * search the process keyrings for a matching key
121 * - nested keyrings may also be searched if they have Search permission
122 * - if a key is found, it will be attached to the destination keyring if
123 * there's one specified
124 * - /sbin/request-key will be invoked if _callout_info is non-NULL
125 * - the _callout_info string will be passed to /sbin/request-key
126 * - if the _callout_info string is empty, it will be rendered as "-"
127 * - implements request_key()
129 asmlinkage
long sys_request_key(const char __user
*_type
,
130 const char __user
*_description
,
131 const char __user
*_callout_info
,
132 key_serial_t destringid
)
134 struct key_type
*ktype
;
137 char type
[32], *description
, *callout_info
;
140 /* pull the type into kernel space */
141 ret
= strncpy_from_user(type
, _type
, sizeof(type
) - 1);
150 /* pull the description into kernel space */
152 dlen
= strnlen_user(_description
, PAGE_SIZE
- 1);
157 if (dlen
> PAGE_SIZE
- 1)
161 description
= kmalloc(dlen
+ 1, GFP_KERNEL
);
166 if (copy_from_user(description
, _description
, dlen
+ 1) != 0)
169 /* pull the callout info into kernel space */
173 dlen
= strnlen_user(_callout_info
, PAGE_SIZE
- 1);
178 if (dlen
> PAGE_SIZE
- 1)
182 callout_info
= kmalloc(dlen
+ 1, GFP_KERNEL
);
187 if (copy_from_user(callout_info
, _callout_info
, dlen
+ 1) != 0)
191 /* get the destination keyring if specified */
194 dest_ref
= lookup_user_key(NULL
, destringid
, 1, 0, KEY_WRITE
);
195 if (IS_ERR(dest_ref
)) {
196 ret
= PTR_ERR(dest_ref
);
201 /* find the key type */
202 ktype
= key_type_lookup(type
);
204 ret
= PTR_ERR(ktype
);
209 key
= request_key_and_link(ktype
, description
, callout_info
,
210 key_ref_to_ptr(dest_ref
));
222 key_ref_put(dest_ref
);
230 } /* end sys_request_key() */
232 /*****************************************************************************/
234 * get the ID of the specified process keyring
235 * - the keyring must have search permission to be found
236 * - implements keyctl(KEYCTL_GET_KEYRING_ID)
238 long keyctl_get_keyring_ID(key_serial_t id
, int create
)
243 key_ref
= lookup_user_key(NULL
, id
, create
, 0, KEY_SEARCH
);
244 if (IS_ERR(key_ref
)) {
245 ret
= PTR_ERR(key_ref
);
249 ret
= key_ref_to_ptr(key_ref
)->serial
;
250 key_ref_put(key_ref
);
254 } /* end keyctl_get_keyring_ID() */
256 /*****************************************************************************/
258 * join the session keyring
259 * - implements keyctl(KEYCTL_JOIN_SESSION_KEYRING)
261 long keyctl_join_session_keyring(const char __user
*_name
)
266 /* fetch the name from userspace */
270 nlen
= strnlen_user(_name
, PAGE_SIZE
- 1);
275 if (nlen
> PAGE_SIZE
- 1)
279 name
= kmalloc(nlen
+ 1, GFP_KERNEL
);
284 if (copy_from_user(name
, _name
, nlen
+ 1) != 0)
288 /* join the session */
289 ret
= join_session_keyring(name
);
296 } /* end keyctl_join_session_keyring() */
298 /*****************************************************************************/
300 * update a key's data payload
301 * - the key must be writable
302 * - implements keyctl(KEYCTL_UPDATE)
304 long keyctl_update_key(key_serial_t id
,
305 const void __user
*_payload
,
313 if (plen
> PAGE_SIZE
)
316 /* pull the payload in if one was supplied */
320 payload
= kmalloc(plen
, GFP_KERNEL
);
325 if (copy_from_user(payload
, _payload
, plen
) != 0)
329 /* find the target key (which must be writable) */
330 key_ref
= lookup_user_key(NULL
, id
, 0, 0, KEY_WRITE
);
331 if (IS_ERR(key_ref
)) {
332 ret
= PTR_ERR(key_ref
);
337 ret
= key_update(key_ref
, payload
, plen
);
339 key_ref_put(key_ref
);
345 } /* end keyctl_update_key() */
347 /*****************************************************************************/
350 * - the key must be writable
351 * - implements keyctl(KEYCTL_REVOKE)
353 long keyctl_revoke_key(key_serial_t id
)
358 key_ref
= lookup_user_key(NULL
, id
, 0, 0, KEY_WRITE
);
359 if (IS_ERR(key_ref
)) {
360 ret
= PTR_ERR(key_ref
);
364 key_revoke(key_ref_to_ptr(key_ref
));
367 key_ref_put(key_ref
);
371 } /* end keyctl_revoke_key() */
373 /*****************************************************************************/
375 * clear the specified process keyring
376 * - the keyring must be writable
377 * - implements keyctl(KEYCTL_CLEAR)
379 long keyctl_keyring_clear(key_serial_t ringid
)
381 key_ref_t keyring_ref
;
384 keyring_ref
= lookup_user_key(NULL
, ringid
, 1, 0, KEY_WRITE
);
385 if (IS_ERR(keyring_ref
)) {
386 ret
= PTR_ERR(keyring_ref
);
390 ret
= keyring_clear(key_ref_to_ptr(keyring_ref
));
392 key_ref_put(keyring_ref
);
396 } /* end keyctl_keyring_clear() */
398 /*****************************************************************************/
400 * link a key into a keyring
401 * - the keyring must be writable
402 * - the key must be linkable
403 * - implements keyctl(KEYCTL_LINK)
405 long keyctl_keyring_link(key_serial_t id
, key_serial_t ringid
)
407 key_ref_t keyring_ref
, key_ref
;
410 keyring_ref
= lookup_user_key(NULL
, ringid
, 1, 0, KEY_WRITE
);
411 if (IS_ERR(keyring_ref
)) {
412 ret
= PTR_ERR(keyring_ref
);
416 key_ref
= lookup_user_key(NULL
, id
, 1, 0, KEY_LINK
);
417 if (IS_ERR(key_ref
)) {
418 ret
= PTR_ERR(key_ref
);
422 ret
= key_link(key_ref_to_ptr(keyring_ref
), key_ref_to_ptr(key_ref
));
424 key_ref_put(key_ref
);
426 key_ref_put(keyring_ref
);
430 } /* end keyctl_keyring_link() */
432 /*****************************************************************************/
434 * unlink the first attachment of a key from a keyring
435 * - the keyring must be writable
436 * - we don't need any permissions on the key
437 * - implements keyctl(KEYCTL_UNLINK)
439 long keyctl_keyring_unlink(key_serial_t id
, key_serial_t ringid
)
441 key_ref_t keyring_ref
, key_ref
;
444 keyring_ref
= lookup_user_key(NULL
, ringid
, 0, 0, KEY_WRITE
);
445 if (IS_ERR(keyring_ref
)) {
446 ret
= PTR_ERR(keyring_ref
);
450 key_ref
= lookup_user_key(NULL
, id
, 0, 0, 0);
451 if (IS_ERR(key_ref
)) {
452 ret
= PTR_ERR(key_ref
);
456 ret
= key_unlink(key_ref_to_ptr(keyring_ref
), key_ref_to_ptr(key_ref
));
458 key_ref_put(key_ref
);
460 key_ref_put(keyring_ref
);
464 } /* end keyctl_keyring_unlink() */
466 /*****************************************************************************/
468 * describe a user key
469 * - the key must have view permission
470 * - if there's a buffer, we place up to buflen bytes of data into it
471 * - unless there's an error, we return the amount of description available,
472 * irrespective of how much we may have copied
473 * - the description is formatted thus:
474 * type;uid;gid;perm;description<NUL>
475 * - implements keyctl(KEYCTL_DESCRIBE)
477 long keyctl_describe_key(key_serial_t keyid
,
481 struct key
*key
, *instkey
;
486 key_ref
= lookup_user_key(NULL
, keyid
, 0, 1, KEY_VIEW
);
487 if (IS_ERR(key_ref
)) {
488 /* viewing a key under construction is permitted if we have the
489 * authorisation token handy */
490 if (PTR_ERR(key_ref
) == -EACCES
) {
491 instkey
= key_get_instantiation_authkey(keyid
);
492 if (!IS_ERR(instkey
)) {
494 key_ref
= lookup_user_key(NULL
, keyid
,
496 if (!IS_ERR(key_ref
))
501 ret
= PTR_ERR(key_ref
);
506 /* calculate how much description we're going to return */
508 tmpbuf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
512 key
= key_ref_to_ptr(key_ref
);
514 ret
= snprintf(tmpbuf
, PAGE_SIZE
- 1,
516 key_ref_to_ptr(key_ref
)->type
->name
,
517 key_ref_to_ptr(key_ref
)->uid
,
518 key_ref_to_ptr(key_ref
)->gid
,
519 key_ref_to_ptr(key_ref
)->perm
,
520 key_ref_to_ptr(key_ref
)->description
?
521 key_ref_to_ptr(key_ref
)->description
: ""
524 /* include a NUL char at the end of the data */
525 if (ret
> PAGE_SIZE
- 1)
530 /* consider returning the data */
531 if (buffer
&& buflen
> 0) {
535 if (copy_to_user(buffer
, tmpbuf
, buflen
) != 0)
541 key_ref_put(key_ref
);
545 } /* end keyctl_describe_key() */
547 /*****************************************************************************/
549 * search the specified keyring for a matching key
550 * - the start keyring must be searchable
551 * - nested keyrings may also be searched if they are searchable
552 * - only keys with search permission may be found
553 * - if a key is found, it will be attached to the destination keyring if
554 * there's one specified
555 * - implements keyctl(KEYCTL_SEARCH)
557 long keyctl_keyring_search(key_serial_t ringid
,
558 const char __user
*_type
,
559 const char __user
*_description
,
560 key_serial_t destringid
)
562 struct key_type
*ktype
;
563 key_ref_t keyring_ref
, key_ref
, dest_ref
;
564 char type
[32], *description
;
567 /* pull the type and description into kernel space */
568 ret
= strncpy_from_user(type
, _type
, sizeof(type
) - 1);
574 dlen
= strnlen_user(_description
, PAGE_SIZE
- 1);
579 if (dlen
> PAGE_SIZE
- 1)
583 description
= kmalloc(dlen
+ 1, GFP_KERNEL
);
588 if (copy_from_user(description
, _description
, dlen
+ 1) != 0)
591 /* get the keyring at which to begin the search */
592 keyring_ref
= lookup_user_key(NULL
, ringid
, 0, 0, KEY_SEARCH
);
593 if (IS_ERR(keyring_ref
)) {
594 ret
= PTR_ERR(keyring_ref
);
598 /* get the destination keyring if specified */
601 dest_ref
= lookup_user_key(NULL
, destringid
, 1, 0, KEY_WRITE
);
602 if (IS_ERR(dest_ref
)) {
603 ret
= PTR_ERR(dest_ref
);
608 /* find the key type */
609 ktype
= key_type_lookup(type
);
611 ret
= PTR_ERR(ktype
);
616 key_ref
= keyring_search(keyring_ref
, ktype
, description
);
617 if (IS_ERR(key_ref
)) {
618 ret
= PTR_ERR(key_ref
);
620 /* treat lack or presence of a negative key the same */
626 /* link the resulting key to the destination keyring if we can */
628 ret
= key_permission(key_ref
, KEY_LINK
);
632 ret
= key_link(key_ref_to_ptr(dest_ref
), key_ref_to_ptr(key_ref
));
637 ret
= key_ref_to_ptr(key_ref
)->serial
;
640 key_ref_put(key_ref
);
644 key_ref_put(dest_ref
);
646 key_ref_put(keyring_ref
);
652 } /* end keyctl_keyring_search() */
654 /*****************************************************************************/
656 * read a user key's payload
657 * - the keyring must be readable or the key must be searchable from the
659 * - if there's a buffer, we place up to buflen bytes of data into it
660 * - unless there's an error, we return the amount of data in the key,
661 * irrespective of how much we may have copied
662 * - implements keyctl(KEYCTL_READ)
664 long keyctl_read_key(key_serial_t keyid
, char __user
*buffer
, size_t buflen
)
670 /* find the key first */
671 key_ref
= lookup_user_key(NULL
, keyid
, 0, 0, 0);
672 if (IS_ERR(key_ref
)) {
677 key
= key_ref_to_ptr(key_ref
);
679 /* see if we can read it directly */
680 ret
= key_permission(key_ref
, KEY_READ
);
686 /* we can't; see if it's searchable from this process's keyrings
687 * - we automatically take account of the fact that it may be
688 * dangling off an instantiation key
690 if (!is_key_possessed(key_ref
)) {
695 /* the key is probably readable - now try to read it */
697 ret
= key_validate(key
);
700 if (key
->type
->read
) {
701 /* read the data with the semaphore held (since we
703 down_read(&key
->sem
);
704 ret
= key
->type
->read(key
, buffer
, buflen
);
714 } /* end keyctl_read_key() */
716 /*****************************************************************************/
718 * change the ownership of a key
719 * - the keyring owned by the changer
720 * - if the uid or gid is -1, then that parameter is not changed
721 * - implements keyctl(KEYCTL_CHOWN)
723 long keyctl_chown_key(key_serial_t id
, uid_t uid
, gid_t gid
)
730 if (uid
== (uid_t
) -1 && gid
== (gid_t
) -1)
733 key_ref
= lookup_user_key(NULL
, id
, 1, 1, KEY_SETATTR
);
734 if (IS_ERR(key_ref
)) {
735 ret
= PTR_ERR(key_ref
);
739 key
= key_ref_to_ptr(key_ref
);
741 /* make the changes with the locks held to prevent chown/chown races */
743 down_write(&key
->sem
);
745 if (!capable(CAP_SYS_ADMIN
)) {
746 /* only the sysadmin can chown a key to some other UID */
747 if (uid
!= (uid_t
) -1 && key
->uid
!= uid
)
750 /* only the sysadmin can set the key's GID to a group other
751 * than one of those that the current process subscribes to */
752 if (gid
!= (gid_t
) -1 && gid
!= key
->gid
&& !in_group_p(gid
))
756 /* change the UID (have to update the quotas) */
757 if (uid
!= (uid_t
) -1 && uid
!= key
->uid
) {
758 /* don't support UID changing yet */
764 if (gid
!= (gid_t
) -1)
775 } /* end keyctl_chown_key() */
777 /*****************************************************************************/
779 * change the permission mask on a key
780 * - the keyring owned by the changer
781 * - implements keyctl(KEYCTL_SETPERM)
783 long keyctl_setperm_key(key_serial_t id
, key_perm_t perm
)
790 if (perm
& ~(KEY_POS_ALL
| KEY_USR_ALL
| KEY_GRP_ALL
| KEY_OTH_ALL
))
793 key_ref
= lookup_user_key(NULL
, id
, 1, 1, KEY_SETATTR
);
794 if (IS_ERR(key_ref
)) {
795 ret
= PTR_ERR(key_ref
);
799 key
= key_ref_to_ptr(key_ref
);
801 /* make the changes with the locks held to prevent chown/chmod races */
803 down_write(&key
->sem
);
805 /* if we're not the sysadmin, we can only change a key that we own */
806 if (capable(CAP_SYS_ADMIN
) || key
->uid
== current
->fsuid
) {
816 } /* end keyctl_setperm_key() */
818 /*****************************************************************************/
820 * instantiate the key with the specified payload, and, if one is given, link
821 * the key into the keyring
823 long keyctl_instantiate_key(key_serial_t id
,
824 const void __user
*_payload
,
828 struct request_key_auth
*rka
;
830 key_ref_t keyring_ref
;
838 /* the appropriate instantiation authorisation key must have been
839 * assumed before calling this */
841 instkey
= current
->request_key_auth
;
845 rka
= instkey
->payload
.data
;
846 if (rka
->target_key
->serial
!= id
)
849 /* pull the payload in if one was supplied */
854 payload
= kmalloc(plen
, GFP_KERNEL
);
859 if (copy_from_user(payload
, _payload
, plen
) != 0)
863 /* find the destination keyring amongst those belonging to the
867 keyring_ref
= lookup_user_key(rka
->context
, ringid
, 1, 0,
869 if (IS_ERR(keyring_ref
)) {
870 ret
= PTR_ERR(keyring_ref
);
875 /* instantiate the key and link it into a keyring */
876 ret
= key_instantiate_and_link(rka
->target_key
, payload
, plen
,
877 key_ref_to_ptr(keyring_ref
), instkey
);
879 key_ref_put(keyring_ref
);
881 /* discard the assumed authority if it's just been disabled by
882 * instantiation of the key */
884 key_put(current
->request_key_auth
);
885 current
->request_key_auth
= NULL
;
893 } /* end keyctl_instantiate_key() */
895 /*****************************************************************************/
897 * negatively instantiate the key with the given timeout (in seconds), and, if
898 * one is given, link the key into the keyring
900 long keyctl_negate_key(key_serial_t id
, unsigned timeout
, key_serial_t ringid
)
902 struct request_key_auth
*rka
;
904 key_ref_t keyring_ref
;
907 /* the appropriate instantiation authorisation key must have been
908 * assumed before calling this */
910 instkey
= current
->request_key_auth
;
914 rka
= instkey
->payload
.data
;
915 if (rka
->target_key
->serial
!= id
)
918 /* find the destination keyring if present (which must also be
922 keyring_ref
= lookup_user_key(NULL
, ringid
, 1, 0, KEY_WRITE
);
923 if (IS_ERR(keyring_ref
)) {
924 ret
= PTR_ERR(keyring_ref
);
929 /* instantiate the key and link it into a keyring */
930 ret
= key_negate_and_link(rka
->target_key
, timeout
,
931 key_ref_to_ptr(keyring_ref
), instkey
);
933 key_ref_put(keyring_ref
);
935 /* discard the assumed authority if it's just been disabled by
936 * instantiation of the key */
938 key_put(current
->request_key_auth
);
939 current
->request_key_auth
= NULL
;
945 } /* end keyctl_negate_key() */
947 /*****************************************************************************/
949 * set the default keyring in which request_key() will cache keys
950 * - return the old setting
952 long keyctl_set_reqkey_keyring(int reqkey_defl
)
956 switch (reqkey_defl
) {
957 case KEY_REQKEY_DEFL_THREAD_KEYRING
:
958 ret
= install_thread_keyring(current
);
963 case KEY_REQKEY_DEFL_PROCESS_KEYRING
:
964 ret
= install_process_keyring(current
);
968 case KEY_REQKEY_DEFL_DEFAULT
:
969 case KEY_REQKEY_DEFL_SESSION_KEYRING
:
970 case KEY_REQKEY_DEFL_USER_KEYRING
:
971 case KEY_REQKEY_DEFL_USER_SESSION_KEYRING
:
973 current
->jit_keyring
= reqkey_defl
;
975 case KEY_REQKEY_DEFL_NO_CHANGE
:
976 return current
->jit_keyring
;
978 case KEY_REQKEY_DEFL_GROUP_KEYRING
:
983 } /* end keyctl_set_reqkey_keyring() */
985 /*****************************************************************************/
987 * set or clear the timeout for a key
989 long keyctl_set_timeout(key_serial_t id
, unsigned timeout
)
997 key_ref
= lookup_user_key(NULL
, id
, 1, 1, KEY_SETATTR
);
998 if (IS_ERR(key_ref
)) {
999 ret
= PTR_ERR(key_ref
);
1003 key
= key_ref_to_ptr(key_ref
);
1005 /* make the changes with the locks held to prevent races */
1006 down_write(&key
->sem
);
1010 now
= current_kernel_time();
1011 expiry
= now
.tv_sec
+ timeout
;
1014 key
->expiry
= expiry
;
1016 up_write(&key
->sem
);
1023 } /* end keyctl_set_timeout() */
1025 /*****************************************************************************/
1027 * assume the authority to instantiate the specified key
1029 long keyctl_assume_authority(key_serial_t id
)
1031 struct key
*authkey
;
1034 /* special key IDs aren't permitted */
1039 /* we divest ourselves of authority if given an ID of 0 */
1041 key_put(current
->request_key_auth
);
1042 current
->request_key_auth
= NULL
;
1047 /* attempt to assume the authority temporarily granted to us whilst we
1048 * instantiate the specified key
1049 * - the authorisation key must be in the current task's keyrings
1052 authkey
= key_get_instantiation_authkey(id
);
1053 if (IS_ERR(authkey
)) {
1054 ret
= PTR_ERR(authkey
);
1058 key_put(current
->request_key_auth
);
1059 current
->request_key_auth
= authkey
;
1060 ret
= authkey
->serial
;
1065 } /* end keyctl_assume_authority() */
1067 /*****************************************************************************/
1069 * the key control system call
1071 asmlinkage
long sys_keyctl(int option
, unsigned long arg2
, unsigned long arg3
,
1072 unsigned long arg4
, unsigned long arg5
)
1075 case KEYCTL_GET_KEYRING_ID
:
1076 return keyctl_get_keyring_ID((key_serial_t
) arg2
,
1079 case KEYCTL_JOIN_SESSION_KEYRING
:
1080 return keyctl_join_session_keyring((const char __user
*) arg2
);
1083 return keyctl_update_key((key_serial_t
) arg2
,
1084 (const void __user
*) arg3
,
1088 return keyctl_revoke_key((key_serial_t
) arg2
);
1090 case KEYCTL_DESCRIBE
:
1091 return keyctl_describe_key((key_serial_t
) arg2
,
1092 (char __user
*) arg3
,
1096 return keyctl_keyring_clear((key_serial_t
) arg2
);
1099 return keyctl_keyring_link((key_serial_t
) arg2
,
1100 (key_serial_t
) arg3
);
1103 return keyctl_keyring_unlink((key_serial_t
) arg2
,
1104 (key_serial_t
) arg3
);
1107 return keyctl_keyring_search((key_serial_t
) arg2
,
1108 (const char __user
*) arg3
,
1109 (const char __user
*) arg4
,
1110 (key_serial_t
) arg5
);
1113 return keyctl_read_key((key_serial_t
) arg2
,
1114 (char __user
*) arg3
,
1118 return keyctl_chown_key((key_serial_t
) arg2
,
1122 case KEYCTL_SETPERM
:
1123 return keyctl_setperm_key((key_serial_t
) arg2
,
1126 case KEYCTL_INSTANTIATE
:
1127 return keyctl_instantiate_key((key_serial_t
) arg2
,
1128 (const void __user
*) arg3
,
1130 (key_serial_t
) arg5
);
1133 return keyctl_negate_key((key_serial_t
) arg2
,
1135 (key_serial_t
) arg4
);
1137 case KEYCTL_SET_REQKEY_KEYRING
:
1138 return keyctl_set_reqkey_keyring(arg2
);
1140 case KEYCTL_SET_TIMEOUT
:
1141 return keyctl_set_timeout((key_serial_t
) arg2
,
1144 case KEYCTL_ASSUME_AUTHORITY
:
1145 return keyctl_assume_authority((key_serial_t
) arg2
);
1151 } /* end sys_keyctl() */