1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 1991, 1992 Linus Torvalds
8 #include <linux/export.h>
10 #include <linux/utsname.h>
11 #include <linux/mman.h>
12 #include <linux/reboot.h>
13 #include <linux/prctl.h>
14 #include <linux/highuid.h>
16 #include <linux/kmod.h>
17 #include <linux/perf_event.h>
18 #include <linux/resource.h>
19 #include <linux/kernel.h>
20 #include <linux/workqueue.h>
21 #include <linux/capability.h>
22 #include <linux/device.h>
23 #include <linux/key.h>
24 #include <linux/times.h>
25 #include <linux/posix-timers.h>
26 #include <linux/security.h>
27 #include <linux/dcookies.h>
28 #include <linux/suspend.h>
29 #include <linux/tty.h>
30 #include <linux/signal.h>
31 #include <linux/cn_proc.h>
32 #include <linux/getcpu.h>
33 #include <linux/task_io_accounting_ops.h>
34 #include <linux/seccomp.h>
35 #include <linux/cpu.h>
36 #include <linux/personality.h>
37 #include <linux/ptrace.h>
38 #include <linux/fs_struct.h>
39 #include <linux/file.h>
40 #include <linux/mount.h>
41 #include <linux/gfp.h>
42 #include <linux/syscore_ops.h>
43 #include <linux/version.h>
44 #include <linux/ctype.h>
46 #include <linux/compat.h>
47 #include <linux/syscalls.h>
48 #include <linux/kprobes.h>
49 #include <linux/user_namespace.h>
50 #include <linux/binfmts.h>
52 #include <linux/sched.h>
53 #include <linux/sched/autogroup.h>
54 #include <linux/sched/loadavg.h>
55 #include <linux/sched/stat.h>
56 #include <linux/sched/mm.h>
57 #include <linux/sched/coredump.h>
58 #include <linux/sched/task.h>
59 #include <linux/sched/cputime.h>
60 #include <linux/rcupdate.h>
61 #include <linux/uidgid.h>
62 #include <linux/cred.h>
64 #include <linux/kmsg_dump.h>
65 /* Move somewhere else to avoid recompiling? */
66 #include <generated/utsrelease.h>
68 #include <linux/uaccess.h>
70 #include <asm/unistd.h>
72 #ifndef SET_UNALIGN_CTL
73 # define SET_UNALIGN_CTL(a, b) (-EINVAL)
75 #ifndef GET_UNALIGN_CTL
76 # define GET_UNALIGN_CTL(a, b) (-EINVAL)
79 # define SET_FPEMU_CTL(a, b) (-EINVAL)
82 # define GET_FPEMU_CTL(a, b) (-EINVAL)
85 # define SET_FPEXC_CTL(a, b) (-EINVAL)
88 # define GET_FPEXC_CTL(a, b) (-EINVAL)
91 # define GET_ENDIAN(a, b) (-EINVAL)
94 # define SET_ENDIAN(a, b) (-EINVAL)
97 # define GET_TSC_CTL(a) (-EINVAL)
100 # define SET_TSC_CTL(a) (-EINVAL)
102 #ifndef MPX_ENABLE_MANAGEMENT
103 # define MPX_ENABLE_MANAGEMENT() (-EINVAL)
105 #ifndef MPX_DISABLE_MANAGEMENT
106 # define MPX_DISABLE_MANAGEMENT() (-EINVAL)
109 # define GET_FP_MODE(a) (-EINVAL)
112 # define SET_FP_MODE(a,b) (-EINVAL)
115 # define SVE_SET_VL(a) (-EINVAL)
118 # define SVE_GET_VL() (-EINVAL)
122 * this is where the system-wide overflow UID and GID are defined, for
123 * architectures that now have 32-bit UID/GID but didn't in the past
126 int overflowuid
= DEFAULT_OVERFLOWUID
;
127 int overflowgid
= DEFAULT_OVERFLOWGID
;
129 EXPORT_SYMBOL(overflowuid
);
130 EXPORT_SYMBOL(overflowgid
);
133 * the same as above, but for filesystems which can only store a 16-bit
134 * UID and GID. as such, this is needed on all architectures
137 int fs_overflowuid
= DEFAULT_FS_OVERFLOWUID
;
138 int fs_overflowgid
= DEFAULT_FS_OVERFLOWUID
;
140 EXPORT_SYMBOL(fs_overflowuid
);
141 EXPORT_SYMBOL(fs_overflowgid
);
144 * Returns true if current's euid is same as p's uid or euid,
145 * or has CAP_SYS_NICE to p's user_ns.
147 * Called with rcu_read_lock, creds are safe
149 static bool set_one_prio_perm(struct task_struct
*p
)
151 const struct cred
*cred
= current_cred(), *pcred
= __task_cred(p
);
153 if (uid_eq(pcred
->uid
, cred
->euid
) ||
154 uid_eq(pcred
->euid
, cred
->euid
))
156 if (ns_capable(pcred
->user_ns
, CAP_SYS_NICE
))
162 * set the priority of a task
163 * - the caller must hold the RCU read lock
165 static int set_one_prio(struct task_struct
*p
, int niceval
, int error
)
169 if (!set_one_prio_perm(p
)) {
173 if (niceval
< task_nice(p
) && !can_nice(p
, niceval
)) {
177 no_nice
= security_task_setnice(p
, niceval
);
184 set_user_nice(p
, niceval
);
189 SYSCALL_DEFINE3(setpriority
, int, which
, int, who
, int, niceval
)
191 struct task_struct
*g
, *p
;
192 struct user_struct
*user
;
193 const struct cred
*cred
= current_cred();
198 if (which
> PRIO_USER
|| which
< PRIO_PROCESS
)
201 /* normalize: avoid signed division (rounding problems) */
203 if (niceval
< MIN_NICE
)
205 if (niceval
> MAX_NICE
)
209 read_lock(&tasklist_lock
);
213 p
= find_task_by_vpid(who
);
217 error
= set_one_prio(p
, niceval
, error
);
221 pgrp
= find_vpid(who
);
223 pgrp
= task_pgrp(current
);
224 do_each_pid_thread(pgrp
, PIDTYPE_PGID
, p
) {
225 error
= set_one_prio(p
, niceval
, error
);
226 } while_each_pid_thread(pgrp
, PIDTYPE_PGID
, p
);
229 uid
= make_kuid(cred
->user_ns
, who
);
233 else if (!uid_eq(uid
, cred
->uid
)) {
234 user
= find_user(uid
);
236 goto out_unlock
; /* No processes for this user */
238 do_each_thread(g
, p
) {
239 if (uid_eq(task_uid(p
), uid
) && task_pid_vnr(p
))
240 error
= set_one_prio(p
, niceval
, error
);
241 } while_each_thread(g
, p
);
242 if (!uid_eq(uid
, cred
->uid
))
243 free_uid(user
); /* For find_user() */
247 read_unlock(&tasklist_lock
);
254 * Ugh. To avoid negative return values, "getpriority()" will
255 * not return the normal nice-value, but a negated value that
256 * has been offset by 20 (ie it returns 40..1 instead of -20..19)
257 * to stay compatible.
259 SYSCALL_DEFINE2(getpriority
, int, which
, int, who
)
261 struct task_struct
*g
, *p
;
262 struct user_struct
*user
;
263 const struct cred
*cred
= current_cred();
264 long niceval
, retval
= -ESRCH
;
268 if (which
> PRIO_USER
|| which
< PRIO_PROCESS
)
272 read_lock(&tasklist_lock
);
276 p
= find_task_by_vpid(who
);
280 niceval
= nice_to_rlimit(task_nice(p
));
281 if (niceval
> retval
)
287 pgrp
= find_vpid(who
);
289 pgrp
= task_pgrp(current
);
290 do_each_pid_thread(pgrp
, PIDTYPE_PGID
, p
) {
291 niceval
= nice_to_rlimit(task_nice(p
));
292 if (niceval
> retval
)
294 } while_each_pid_thread(pgrp
, PIDTYPE_PGID
, p
);
297 uid
= make_kuid(cred
->user_ns
, who
);
301 else if (!uid_eq(uid
, cred
->uid
)) {
302 user
= find_user(uid
);
304 goto out_unlock
; /* No processes for this user */
306 do_each_thread(g
, p
) {
307 if (uid_eq(task_uid(p
), uid
) && task_pid_vnr(p
)) {
308 niceval
= nice_to_rlimit(task_nice(p
));
309 if (niceval
> retval
)
312 } while_each_thread(g
, p
);
313 if (!uid_eq(uid
, cred
->uid
))
314 free_uid(user
); /* for find_user() */
318 read_unlock(&tasklist_lock
);
325 * Unprivileged users may change the real gid to the effective gid
326 * or vice versa. (BSD-style)
328 * If you set the real gid at all, or set the effective gid to a value not
329 * equal to the real gid, then the saved gid is set to the new effective gid.
331 * This makes it possible for a setgid program to completely drop its
332 * privileges, which is often a useful assertion to make when you are doing
333 * a security audit over a program.
335 * The general idea is that a program which uses just setregid() will be
336 * 100% compatible with BSD. A program which uses just setgid() will be
337 * 100% compatible with POSIX with saved IDs.
339 * SMP: There are not races, the GIDs are checked only by filesystem
340 * operations (as far as semantic preservation is concerned).
342 #ifdef CONFIG_MULTIUSER
343 SYSCALL_DEFINE2(setregid
, gid_t
, rgid
, gid_t
, egid
)
345 struct user_namespace
*ns
= current_user_ns();
346 const struct cred
*old
;
351 krgid
= make_kgid(ns
, rgid
);
352 kegid
= make_kgid(ns
, egid
);
354 if ((rgid
!= (gid_t
) -1) && !gid_valid(krgid
))
356 if ((egid
!= (gid_t
) -1) && !gid_valid(kegid
))
359 new = prepare_creds();
362 old
= current_cred();
365 if (rgid
!= (gid_t
) -1) {
366 if (gid_eq(old
->gid
, krgid
) ||
367 gid_eq(old
->egid
, krgid
) ||
368 ns_capable(old
->user_ns
, CAP_SETGID
))
373 if (egid
!= (gid_t
) -1) {
374 if (gid_eq(old
->gid
, kegid
) ||
375 gid_eq(old
->egid
, kegid
) ||
376 gid_eq(old
->sgid
, kegid
) ||
377 ns_capable(old
->user_ns
, CAP_SETGID
))
383 if (rgid
!= (gid_t
) -1 ||
384 (egid
!= (gid_t
) -1 && !gid_eq(kegid
, old
->gid
)))
385 new->sgid
= new->egid
;
386 new->fsgid
= new->egid
;
388 return commit_creds(new);
396 * setgid() is implemented like SysV w/ SAVED_IDS
398 * SMP: Same implicit races as above.
400 SYSCALL_DEFINE1(setgid
, gid_t
, gid
)
402 struct user_namespace
*ns
= current_user_ns();
403 const struct cred
*old
;
408 kgid
= make_kgid(ns
, gid
);
409 if (!gid_valid(kgid
))
412 new = prepare_creds();
415 old
= current_cred();
418 if (ns_capable(old
->user_ns
, CAP_SETGID
))
419 new->gid
= new->egid
= new->sgid
= new->fsgid
= kgid
;
420 else if (gid_eq(kgid
, old
->gid
) || gid_eq(kgid
, old
->sgid
))
421 new->egid
= new->fsgid
= kgid
;
425 return commit_creds(new);
433 * change the user struct in a credentials set to match the new UID
435 static int set_user(struct cred
*new)
437 struct user_struct
*new_user
;
439 new_user
= alloc_uid(new->uid
);
444 * We don't fail in case of NPROC limit excess here because too many
445 * poorly written programs don't check set*uid() return code, assuming
446 * it never fails if called by root. We may still enforce NPROC limit
447 * for programs doing set*uid()+execve() by harmlessly deferring the
448 * failure to the execve() stage.
450 if (atomic_read(&new_user
->processes
) >= rlimit(RLIMIT_NPROC
) &&
451 new_user
!= INIT_USER
)
452 current
->flags
|= PF_NPROC_EXCEEDED
;
454 current
->flags
&= ~PF_NPROC_EXCEEDED
;
457 new->user
= new_user
;
462 * Unprivileged users may change the real uid to the effective uid
463 * or vice versa. (BSD-style)
465 * If you set the real uid at all, or set the effective uid to a value not
466 * equal to the real uid, then the saved uid is set to the new effective uid.
468 * This makes it possible for a setuid program to completely drop its
469 * privileges, which is often a useful assertion to make when you are doing
470 * a security audit over a program.
472 * The general idea is that a program which uses just setreuid() will be
473 * 100% compatible with BSD. A program which uses just setuid() will be
474 * 100% compatible with POSIX with saved IDs.
476 SYSCALL_DEFINE2(setreuid
, uid_t
, ruid
, uid_t
, euid
)
478 struct user_namespace
*ns
= current_user_ns();
479 const struct cred
*old
;
484 kruid
= make_kuid(ns
, ruid
);
485 keuid
= make_kuid(ns
, euid
);
487 if ((ruid
!= (uid_t
) -1) && !uid_valid(kruid
))
489 if ((euid
!= (uid_t
) -1) && !uid_valid(keuid
))
492 new = prepare_creds();
495 old
= current_cred();
498 if (ruid
!= (uid_t
) -1) {
500 if (!uid_eq(old
->uid
, kruid
) &&
501 !uid_eq(old
->euid
, kruid
) &&
502 !ns_capable(old
->user_ns
, CAP_SETUID
))
506 if (euid
!= (uid_t
) -1) {
508 if (!uid_eq(old
->uid
, keuid
) &&
509 !uid_eq(old
->euid
, keuid
) &&
510 !uid_eq(old
->suid
, keuid
) &&
511 !ns_capable(old
->user_ns
, CAP_SETUID
))
515 if (!uid_eq(new->uid
, old
->uid
)) {
516 retval
= set_user(new);
520 if (ruid
!= (uid_t
) -1 ||
521 (euid
!= (uid_t
) -1 && !uid_eq(keuid
, old
->uid
)))
522 new->suid
= new->euid
;
523 new->fsuid
= new->euid
;
525 retval
= security_task_fix_setuid(new, old
, LSM_SETID_RE
);
529 return commit_creds(new);
537 * setuid() is implemented like SysV with SAVED_IDS
539 * Note that SAVED_ID's is deficient in that a setuid root program
540 * like sendmail, for example, cannot set its uid to be a normal
541 * user and then switch back, because if you're root, setuid() sets
542 * the saved uid too. If you don't like this, blame the bright people
543 * in the POSIX committee and/or USG. Note that the BSD-style setreuid()
544 * will allow a root program to temporarily drop privileges and be able to
545 * regain them by swapping the real and effective uid.
547 SYSCALL_DEFINE1(setuid
, uid_t
, uid
)
549 struct user_namespace
*ns
= current_user_ns();
550 const struct cred
*old
;
555 kuid
= make_kuid(ns
, uid
);
556 if (!uid_valid(kuid
))
559 new = prepare_creds();
562 old
= current_cred();
565 if (ns_capable(old
->user_ns
, CAP_SETUID
)) {
566 new->suid
= new->uid
= kuid
;
567 if (!uid_eq(kuid
, old
->uid
)) {
568 retval
= set_user(new);
572 } else if (!uid_eq(kuid
, old
->uid
) && !uid_eq(kuid
, new->suid
)) {
576 new->fsuid
= new->euid
= kuid
;
578 retval
= security_task_fix_setuid(new, old
, LSM_SETID_ID
);
582 return commit_creds(new);
591 * This function implements a generic ability to update ruid, euid,
592 * and suid. This allows you to implement the 4.4 compatible seteuid().
594 SYSCALL_DEFINE3(setresuid
, uid_t
, ruid
, uid_t
, euid
, uid_t
, suid
)
596 struct user_namespace
*ns
= current_user_ns();
597 const struct cred
*old
;
600 kuid_t kruid
, keuid
, ksuid
;
602 kruid
= make_kuid(ns
, ruid
);
603 keuid
= make_kuid(ns
, euid
);
604 ksuid
= make_kuid(ns
, suid
);
606 if ((ruid
!= (uid_t
) -1) && !uid_valid(kruid
))
609 if ((euid
!= (uid_t
) -1) && !uid_valid(keuid
))
612 if ((suid
!= (uid_t
) -1) && !uid_valid(ksuid
))
615 new = prepare_creds();
619 old
= current_cred();
622 if (!ns_capable(old
->user_ns
, CAP_SETUID
)) {
623 if (ruid
!= (uid_t
) -1 && !uid_eq(kruid
, old
->uid
) &&
624 !uid_eq(kruid
, old
->euid
) && !uid_eq(kruid
, old
->suid
))
626 if (euid
!= (uid_t
) -1 && !uid_eq(keuid
, old
->uid
) &&
627 !uid_eq(keuid
, old
->euid
) && !uid_eq(keuid
, old
->suid
))
629 if (suid
!= (uid_t
) -1 && !uid_eq(ksuid
, old
->uid
) &&
630 !uid_eq(ksuid
, old
->euid
) && !uid_eq(ksuid
, old
->suid
))
634 if (ruid
!= (uid_t
) -1) {
636 if (!uid_eq(kruid
, old
->uid
)) {
637 retval
= set_user(new);
642 if (euid
!= (uid_t
) -1)
644 if (suid
!= (uid_t
) -1)
646 new->fsuid
= new->euid
;
648 retval
= security_task_fix_setuid(new, old
, LSM_SETID_RES
);
652 return commit_creds(new);
659 SYSCALL_DEFINE3(getresuid
, uid_t __user
*, ruidp
, uid_t __user
*, euidp
, uid_t __user
*, suidp
)
661 const struct cred
*cred
= current_cred();
663 uid_t ruid
, euid
, suid
;
665 ruid
= from_kuid_munged(cred
->user_ns
, cred
->uid
);
666 euid
= from_kuid_munged(cred
->user_ns
, cred
->euid
);
667 suid
= from_kuid_munged(cred
->user_ns
, cred
->suid
);
669 retval
= put_user(ruid
, ruidp
);
671 retval
= put_user(euid
, euidp
);
673 return put_user(suid
, suidp
);
679 * Same as above, but for rgid, egid, sgid.
681 SYSCALL_DEFINE3(setresgid
, gid_t
, rgid
, gid_t
, egid
, gid_t
, sgid
)
683 struct user_namespace
*ns
= current_user_ns();
684 const struct cred
*old
;
687 kgid_t krgid
, kegid
, ksgid
;
689 krgid
= make_kgid(ns
, rgid
);
690 kegid
= make_kgid(ns
, egid
);
691 ksgid
= make_kgid(ns
, sgid
);
693 if ((rgid
!= (gid_t
) -1) && !gid_valid(krgid
))
695 if ((egid
!= (gid_t
) -1) && !gid_valid(kegid
))
697 if ((sgid
!= (gid_t
) -1) && !gid_valid(ksgid
))
700 new = prepare_creds();
703 old
= current_cred();
706 if (!ns_capable(old
->user_ns
, CAP_SETGID
)) {
707 if (rgid
!= (gid_t
) -1 && !gid_eq(krgid
, old
->gid
) &&
708 !gid_eq(krgid
, old
->egid
) && !gid_eq(krgid
, old
->sgid
))
710 if (egid
!= (gid_t
) -1 && !gid_eq(kegid
, old
->gid
) &&
711 !gid_eq(kegid
, old
->egid
) && !gid_eq(kegid
, old
->sgid
))
713 if (sgid
!= (gid_t
) -1 && !gid_eq(ksgid
, old
->gid
) &&
714 !gid_eq(ksgid
, old
->egid
) && !gid_eq(ksgid
, old
->sgid
))
718 if (rgid
!= (gid_t
) -1)
720 if (egid
!= (gid_t
) -1)
722 if (sgid
!= (gid_t
) -1)
724 new->fsgid
= new->egid
;
726 return commit_creds(new);
733 SYSCALL_DEFINE3(getresgid
, gid_t __user
*, rgidp
, gid_t __user
*, egidp
, gid_t __user
*, sgidp
)
735 const struct cred
*cred
= current_cred();
737 gid_t rgid
, egid
, sgid
;
739 rgid
= from_kgid_munged(cred
->user_ns
, cred
->gid
);
740 egid
= from_kgid_munged(cred
->user_ns
, cred
->egid
);
741 sgid
= from_kgid_munged(cred
->user_ns
, cred
->sgid
);
743 retval
= put_user(rgid
, rgidp
);
745 retval
= put_user(egid
, egidp
);
747 retval
= put_user(sgid
, sgidp
);
755 * "setfsuid()" sets the fsuid - the uid used for filesystem checks. This
756 * is used for "access()" and for the NFS daemon (letting nfsd stay at
757 * whatever uid it wants to). It normally shadows "euid", except when
758 * explicitly set by setfsuid() or for access..
760 SYSCALL_DEFINE1(setfsuid
, uid_t
, uid
)
762 const struct cred
*old
;
767 old
= current_cred();
768 old_fsuid
= from_kuid_munged(old
->user_ns
, old
->fsuid
);
770 kuid
= make_kuid(old
->user_ns
, uid
);
771 if (!uid_valid(kuid
))
774 new = prepare_creds();
778 if (uid_eq(kuid
, old
->uid
) || uid_eq(kuid
, old
->euid
) ||
779 uid_eq(kuid
, old
->suid
) || uid_eq(kuid
, old
->fsuid
) ||
780 ns_capable(old
->user_ns
, CAP_SETUID
)) {
781 if (!uid_eq(kuid
, old
->fsuid
)) {
783 if (security_task_fix_setuid(new, old
, LSM_SETID_FS
) == 0)
797 * Samma på svenska..
799 SYSCALL_DEFINE1(setfsgid
, gid_t
, gid
)
801 const struct cred
*old
;
806 old
= current_cred();
807 old_fsgid
= from_kgid_munged(old
->user_ns
, old
->fsgid
);
809 kgid
= make_kgid(old
->user_ns
, gid
);
810 if (!gid_valid(kgid
))
813 new = prepare_creds();
817 if (gid_eq(kgid
, old
->gid
) || gid_eq(kgid
, old
->egid
) ||
818 gid_eq(kgid
, old
->sgid
) || gid_eq(kgid
, old
->fsgid
) ||
819 ns_capable(old
->user_ns
, CAP_SETGID
)) {
820 if (!gid_eq(kgid
, old
->fsgid
)) {
833 #endif /* CONFIG_MULTIUSER */
836 * sys_getpid - return the thread group id of the current process
838 * Note, despite the name, this returns the tgid not the pid. The tgid and
839 * the pid are identical unless CLONE_THREAD was specified on clone() in
840 * which case the tgid is the same in all threads of the same group.
842 * This is SMP safe as current->tgid does not change.
844 SYSCALL_DEFINE0(getpid
)
846 return task_tgid_vnr(current
);
849 /* Thread ID - the internal kernel "pid" */
850 SYSCALL_DEFINE0(gettid
)
852 return task_pid_vnr(current
);
856 * Accessing ->real_parent is not SMP-safe, it could
857 * change from under us. However, we can use a stale
858 * value of ->real_parent under rcu_read_lock(), see
859 * release_task()->call_rcu(delayed_put_task_struct).
861 SYSCALL_DEFINE0(getppid
)
866 pid
= task_tgid_vnr(rcu_dereference(current
->real_parent
));
872 SYSCALL_DEFINE0(getuid
)
874 /* Only we change this so SMP safe */
875 return from_kuid_munged(current_user_ns(), current_uid());
878 SYSCALL_DEFINE0(geteuid
)
880 /* Only we change this so SMP safe */
881 return from_kuid_munged(current_user_ns(), current_euid());
884 SYSCALL_DEFINE0(getgid
)
886 /* Only we change this so SMP safe */
887 return from_kgid_munged(current_user_ns(), current_gid());
890 SYSCALL_DEFINE0(getegid
)
892 /* Only we change this so SMP safe */
893 return from_kgid_munged(current_user_ns(), current_egid());
896 static void do_sys_times(struct tms
*tms
)
898 u64 tgutime
, tgstime
, cutime
, cstime
;
900 thread_group_cputime_adjusted(current
, &tgutime
, &tgstime
);
901 cutime
= current
->signal
->cutime
;
902 cstime
= current
->signal
->cstime
;
903 tms
->tms_utime
= nsec_to_clock_t(tgutime
);
904 tms
->tms_stime
= nsec_to_clock_t(tgstime
);
905 tms
->tms_cutime
= nsec_to_clock_t(cutime
);
906 tms
->tms_cstime
= nsec_to_clock_t(cstime
);
909 SYSCALL_DEFINE1(times
, struct tms __user
*, tbuf
)
915 if (copy_to_user(tbuf
, &tmp
, sizeof(struct tms
)))
918 force_successful_syscall_return();
919 return (long) jiffies_64_to_clock_t(get_jiffies_64());
923 static compat_clock_t
clock_t_to_compat_clock_t(clock_t x
)
925 return compat_jiffies_to_clock_t(clock_t_to_jiffies(x
));
928 COMPAT_SYSCALL_DEFINE1(times
, struct compat_tms __user
*, tbuf
)
932 struct compat_tms tmp
;
935 /* Convert our struct tms to the compat version. */
936 tmp
.tms_utime
= clock_t_to_compat_clock_t(tms
.tms_utime
);
937 tmp
.tms_stime
= clock_t_to_compat_clock_t(tms
.tms_stime
);
938 tmp
.tms_cutime
= clock_t_to_compat_clock_t(tms
.tms_cutime
);
939 tmp
.tms_cstime
= clock_t_to_compat_clock_t(tms
.tms_cstime
);
940 if (copy_to_user(tbuf
, &tmp
, sizeof(tmp
)))
943 force_successful_syscall_return();
944 return compat_jiffies_to_clock_t(jiffies
);
949 * This needs some heavy checking ...
950 * I just haven't the stomach for it. I also don't fully
951 * understand sessions/pgrp etc. Let somebody who does explain it.
953 * OK, I think I have the protection semantics right.... this is really
954 * only important on a multi-user system anyway, to make sure one user
955 * can't send a signal to a process owned by another. -TYT, 12/12/91
957 * !PF_FORKNOEXEC check to conform completely to POSIX.
959 SYSCALL_DEFINE2(setpgid
, pid_t
, pid
, pid_t
, pgid
)
961 struct task_struct
*p
;
962 struct task_struct
*group_leader
= current
->group_leader
;
967 pid
= task_pid_vnr(group_leader
);
974 /* From this point forward we keep holding onto the tasklist lock
975 * so that our parent does not change from under us. -DaveM
977 write_lock_irq(&tasklist_lock
);
980 p
= find_task_by_vpid(pid
);
985 if (!thread_group_leader(p
))
988 if (same_thread_group(p
->real_parent
, group_leader
)) {
990 if (task_session(p
) != task_session(group_leader
))
993 if (!(p
->flags
& PF_FORKNOEXEC
))
997 if (p
!= group_leader
)
1002 if (p
->signal
->leader
)
1007 struct task_struct
*g
;
1009 pgrp
= find_vpid(pgid
);
1010 g
= pid_task(pgrp
, PIDTYPE_PGID
);
1011 if (!g
|| task_session(g
) != task_session(group_leader
))
1015 err
= security_task_setpgid(p
, pgid
);
1019 if (task_pgrp(p
) != pgrp
)
1020 change_pid(p
, PIDTYPE_PGID
, pgrp
);
1024 /* All paths lead to here, thus we are safe. -DaveM */
1025 write_unlock_irq(&tasklist_lock
);
1030 SYSCALL_DEFINE1(getpgid
, pid_t
, pid
)
1032 struct task_struct
*p
;
1038 grp
= task_pgrp(current
);
1041 p
= find_task_by_vpid(pid
);
1048 retval
= security_task_getpgid(p
);
1052 retval
= pid_vnr(grp
);
1058 #ifdef __ARCH_WANT_SYS_GETPGRP
1060 SYSCALL_DEFINE0(getpgrp
)
1062 return sys_getpgid(0);
1067 SYSCALL_DEFINE1(getsid
, pid_t
, pid
)
1069 struct task_struct
*p
;
1075 sid
= task_session(current
);
1078 p
= find_task_by_vpid(pid
);
1081 sid
= task_session(p
);
1085 retval
= security_task_getsid(p
);
1089 retval
= pid_vnr(sid
);
1095 static void set_special_pids(struct pid
*pid
)
1097 struct task_struct
*curr
= current
->group_leader
;
1099 if (task_session(curr
) != pid
)
1100 change_pid(curr
, PIDTYPE_SID
, pid
);
1102 if (task_pgrp(curr
) != pid
)
1103 change_pid(curr
, PIDTYPE_PGID
, pid
);
1106 SYSCALL_DEFINE0(setsid
)
1108 struct task_struct
*group_leader
= current
->group_leader
;
1109 struct pid
*sid
= task_pid(group_leader
);
1110 pid_t session
= pid_vnr(sid
);
1113 write_lock_irq(&tasklist_lock
);
1114 /* Fail if I am already a session leader */
1115 if (group_leader
->signal
->leader
)
1118 /* Fail if a process group id already exists that equals the
1119 * proposed session id.
1121 if (pid_task(sid
, PIDTYPE_PGID
))
1124 group_leader
->signal
->leader
= 1;
1125 set_special_pids(sid
);
1127 proc_clear_tty(group_leader
);
1131 write_unlock_irq(&tasklist_lock
);
1133 proc_sid_connector(group_leader
);
1134 sched_autogroup_create_attach(group_leader
);
1139 DECLARE_RWSEM(uts_sem
);
1141 #ifdef COMPAT_UTS_MACHINE
1142 static char compat_uts_machine
[__OLD_UTS_LEN
+1] = COMPAT_UTS_MACHINE
;
1144 static int __init
parse_compat_uts_machine(char *arg
)
1146 strncpy(compat_uts_machine
, arg
, __OLD_UTS_LEN
);
1147 compat_uts_machine
[__OLD_UTS_LEN
] = 0;
1150 early_param("compat_uts_machine", parse_compat_uts_machine
);
1152 #undef COMPAT_UTS_MACHINE
1153 #define COMPAT_UTS_MACHINE compat_uts_machine
1156 #ifdef COMPAT_UTS_MACHINE
1157 #define override_architecture(name) \
1158 (personality(current->personality) == PER_LINUX32 && \
1159 copy_to_user(name->machine, COMPAT_UTS_MACHINE, \
1160 sizeof(COMPAT_UTS_MACHINE)))
1162 #define override_architecture(name) 0
1166 * Work around broken programs that cannot handle "Linux 3.0".
1167 * Instead we map 3.x to 2.6.40+x, so e.g. 3.0 would be 2.6.40
1168 * And we map 4.x to 2.6.60+x, so 4.0 would be 2.6.60.
1170 static int override_release(char __user
*release
, size_t len
)
1174 if (current
->personality
& UNAME26
) {
1175 const char *rest
= UTS_RELEASE
;
1176 char buf
[65] = { 0 };
1182 if (*rest
== '.' && ++ndots
>= 3)
1184 if (!isdigit(*rest
) && *rest
!= '.')
1188 v
= ((LINUX_VERSION_CODE
>> 8) & 0xff) + 60;
1189 copy
= clamp_t(size_t, len
, 1, sizeof(buf
));
1190 copy
= scnprintf(buf
, copy
, "2.6.%u%s", v
, rest
);
1191 ret
= copy_to_user(release
, buf
, copy
+ 1);
1196 SYSCALL_DEFINE1(newuname
, struct new_utsname __user
*, name
)
1200 down_read(&uts_sem
);
1201 if (copy_to_user(name
, utsname(), sizeof *name
))
1205 if (!errno
&& override_release(name
->release
, sizeof(name
->release
)))
1207 if (!errno
&& override_architecture(name
))
1212 #ifdef __ARCH_WANT_SYS_OLD_UNAME
1216 SYSCALL_DEFINE1(uname
, struct old_utsname __user
*, name
)
1223 down_read(&uts_sem
);
1224 if (copy_to_user(name
, utsname(), sizeof(*name
)))
1228 if (!error
&& override_release(name
->release
, sizeof(name
->release
)))
1230 if (!error
&& override_architecture(name
))
1235 SYSCALL_DEFINE1(olduname
, struct oldold_utsname __user
*, name
)
1241 if (!access_ok(VERIFY_WRITE
, name
, sizeof(struct oldold_utsname
)))
1244 down_read(&uts_sem
);
1245 error
= __copy_to_user(&name
->sysname
, &utsname()->sysname
,
1247 error
|= __put_user(0, name
->sysname
+ __OLD_UTS_LEN
);
1248 error
|= __copy_to_user(&name
->nodename
, &utsname()->nodename
,
1250 error
|= __put_user(0, name
->nodename
+ __OLD_UTS_LEN
);
1251 error
|= __copy_to_user(&name
->release
, &utsname()->release
,
1253 error
|= __put_user(0, name
->release
+ __OLD_UTS_LEN
);
1254 error
|= __copy_to_user(&name
->version
, &utsname()->version
,
1256 error
|= __put_user(0, name
->version
+ __OLD_UTS_LEN
);
1257 error
|= __copy_to_user(&name
->machine
, &utsname()->machine
,
1259 error
|= __put_user(0, name
->machine
+ __OLD_UTS_LEN
);
1262 if (!error
&& override_architecture(name
))
1264 if (!error
&& override_release(name
->release
, sizeof(name
->release
)))
1266 return error
? -EFAULT
: 0;
1270 SYSCALL_DEFINE2(sethostname
, char __user
*, name
, int, len
)
1273 char tmp
[__NEW_UTS_LEN
];
1275 if (!ns_capable(current
->nsproxy
->uts_ns
->user_ns
, CAP_SYS_ADMIN
))
1278 if (len
< 0 || len
> __NEW_UTS_LEN
)
1280 down_write(&uts_sem
);
1282 if (!copy_from_user(tmp
, name
, len
)) {
1283 struct new_utsname
*u
= utsname();
1285 memcpy(u
->nodename
, tmp
, len
);
1286 memset(u
->nodename
+ len
, 0, sizeof(u
->nodename
) - len
);
1288 uts_proc_notify(UTS_PROC_HOSTNAME
);
1294 #ifdef __ARCH_WANT_SYS_GETHOSTNAME
1296 SYSCALL_DEFINE2(gethostname
, char __user
*, name
, int, len
)
1299 struct new_utsname
*u
;
1303 down_read(&uts_sem
);
1305 i
= 1 + strlen(u
->nodename
);
1309 if (copy_to_user(name
, u
->nodename
, i
))
1318 * Only setdomainname; getdomainname can be implemented by calling
1321 SYSCALL_DEFINE2(setdomainname
, char __user
*, name
, int, len
)
1324 char tmp
[__NEW_UTS_LEN
];
1326 if (!ns_capable(current
->nsproxy
->uts_ns
->user_ns
, CAP_SYS_ADMIN
))
1328 if (len
< 0 || len
> __NEW_UTS_LEN
)
1331 down_write(&uts_sem
);
1333 if (!copy_from_user(tmp
, name
, len
)) {
1334 struct new_utsname
*u
= utsname();
1336 memcpy(u
->domainname
, tmp
, len
);
1337 memset(u
->domainname
+ len
, 0, sizeof(u
->domainname
) - len
);
1339 uts_proc_notify(UTS_PROC_DOMAINNAME
);
1345 SYSCALL_DEFINE2(getrlimit
, unsigned int, resource
, struct rlimit __user
*, rlim
)
1347 struct rlimit value
;
1350 ret
= do_prlimit(current
, resource
, NULL
, &value
);
1352 ret
= copy_to_user(rlim
, &value
, sizeof(*rlim
)) ? -EFAULT
: 0;
1357 #ifdef CONFIG_COMPAT
1359 COMPAT_SYSCALL_DEFINE2(setrlimit
, unsigned int, resource
,
1360 struct compat_rlimit __user
*, rlim
)
1363 struct compat_rlimit r32
;
1365 if (copy_from_user(&r32
, rlim
, sizeof(struct compat_rlimit
)))
1368 if (r32
.rlim_cur
== COMPAT_RLIM_INFINITY
)
1369 r
.rlim_cur
= RLIM_INFINITY
;
1371 r
.rlim_cur
= r32
.rlim_cur
;
1372 if (r32
.rlim_max
== COMPAT_RLIM_INFINITY
)
1373 r
.rlim_max
= RLIM_INFINITY
;
1375 r
.rlim_max
= r32
.rlim_max
;
1376 return do_prlimit(current
, resource
, &r
, NULL
);
1379 COMPAT_SYSCALL_DEFINE2(getrlimit
, unsigned int, resource
,
1380 struct compat_rlimit __user
*, rlim
)
1385 ret
= do_prlimit(current
, resource
, NULL
, &r
);
1387 struct compat_rlimit r32
;
1388 if (r
.rlim_cur
> COMPAT_RLIM_INFINITY
)
1389 r32
.rlim_cur
= COMPAT_RLIM_INFINITY
;
1391 r32
.rlim_cur
= r
.rlim_cur
;
1392 if (r
.rlim_max
> COMPAT_RLIM_INFINITY
)
1393 r32
.rlim_max
= COMPAT_RLIM_INFINITY
;
1395 r32
.rlim_max
= r
.rlim_max
;
1397 if (copy_to_user(rlim
, &r32
, sizeof(struct compat_rlimit
)))
1405 #ifdef __ARCH_WANT_SYS_OLD_GETRLIMIT
1408 * Back compatibility for getrlimit. Needed for some apps.
1410 SYSCALL_DEFINE2(old_getrlimit
, unsigned int, resource
,
1411 struct rlimit __user
*, rlim
)
1414 if (resource
>= RLIM_NLIMITS
)
1417 task_lock(current
->group_leader
);
1418 x
= current
->signal
->rlim
[resource
];
1419 task_unlock(current
->group_leader
);
1420 if (x
.rlim_cur
> 0x7FFFFFFF)
1421 x
.rlim_cur
= 0x7FFFFFFF;
1422 if (x
.rlim_max
> 0x7FFFFFFF)
1423 x
.rlim_max
= 0x7FFFFFFF;
1424 return copy_to_user(rlim
, &x
, sizeof(x
)) ? -EFAULT
: 0;
1427 #ifdef CONFIG_COMPAT
1428 COMPAT_SYSCALL_DEFINE2(old_getrlimit
, unsigned int, resource
,
1429 struct compat_rlimit __user
*, rlim
)
1433 if (resource
>= RLIM_NLIMITS
)
1436 task_lock(current
->group_leader
);
1437 r
= current
->signal
->rlim
[resource
];
1438 task_unlock(current
->group_leader
);
1439 if (r
.rlim_cur
> 0x7FFFFFFF)
1440 r
.rlim_cur
= 0x7FFFFFFF;
1441 if (r
.rlim_max
> 0x7FFFFFFF)
1442 r
.rlim_max
= 0x7FFFFFFF;
1444 if (put_user(r
.rlim_cur
, &rlim
->rlim_cur
) ||
1445 put_user(r
.rlim_max
, &rlim
->rlim_max
))
1453 static inline bool rlim64_is_infinity(__u64 rlim64
)
1455 #if BITS_PER_LONG < 64
1456 return rlim64
>= ULONG_MAX
;
1458 return rlim64
== RLIM64_INFINITY
;
1462 static void rlim_to_rlim64(const struct rlimit
*rlim
, struct rlimit64
*rlim64
)
1464 if (rlim
->rlim_cur
== RLIM_INFINITY
)
1465 rlim64
->rlim_cur
= RLIM64_INFINITY
;
1467 rlim64
->rlim_cur
= rlim
->rlim_cur
;
1468 if (rlim
->rlim_max
== RLIM_INFINITY
)
1469 rlim64
->rlim_max
= RLIM64_INFINITY
;
1471 rlim64
->rlim_max
= rlim
->rlim_max
;
1474 static void rlim64_to_rlim(const struct rlimit64
*rlim64
, struct rlimit
*rlim
)
1476 if (rlim64_is_infinity(rlim64
->rlim_cur
))
1477 rlim
->rlim_cur
= RLIM_INFINITY
;
1479 rlim
->rlim_cur
= (unsigned long)rlim64
->rlim_cur
;
1480 if (rlim64_is_infinity(rlim64
->rlim_max
))
1481 rlim
->rlim_max
= RLIM_INFINITY
;
1483 rlim
->rlim_max
= (unsigned long)rlim64
->rlim_max
;
1486 /* make sure you are allowed to change @tsk limits before calling this */
1487 int do_prlimit(struct task_struct
*tsk
, unsigned int resource
,
1488 struct rlimit
*new_rlim
, struct rlimit
*old_rlim
)
1490 struct rlimit
*rlim
;
1493 if (resource
>= RLIM_NLIMITS
)
1496 if (new_rlim
->rlim_cur
> new_rlim
->rlim_max
)
1498 if (resource
== RLIMIT_NOFILE
&&
1499 new_rlim
->rlim_max
> sysctl_nr_open
)
1503 /* protect tsk->signal and tsk->sighand from disappearing */
1504 read_lock(&tasklist_lock
);
1505 if (!tsk
->sighand
) {
1510 rlim
= tsk
->signal
->rlim
+ resource
;
1511 task_lock(tsk
->group_leader
);
1513 /* Keep the capable check against init_user_ns until
1514 cgroups can contain all limits */
1515 if (new_rlim
->rlim_max
> rlim
->rlim_max
&&
1516 !capable(CAP_SYS_RESOURCE
))
1519 retval
= security_task_setrlimit(tsk
, resource
, new_rlim
);
1520 if (resource
== RLIMIT_CPU
&& new_rlim
->rlim_cur
== 0) {
1522 * The caller is asking for an immediate RLIMIT_CPU
1523 * expiry. But we use the zero value to mean "it was
1524 * never set". So let's cheat and make it one second
1527 new_rlim
->rlim_cur
= 1;
1536 task_unlock(tsk
->group_leader
);
1539 * RLIMIT_CPU handling. Note that the kernel fails to return an error
1540 * code if it rejected the user's attempt to set RLIMIT_CPU. This is a
1541 * very long-standing error, and fixing it now risks breakage of
1542 * applications, so we live with it
1544 if (!retval
&& new_rlim
&& resource
== RLIMIT_CPU
&&
1545 new_rlim
->rlim_cur
!= RLIM_INFINITY
&&
1546 IS_ENABLED(CONFIG_POSIX_TIMERS
))
1547 update_rlimit_cpu(tsk
, new_rlim
->rlim_cur
);
1549 read_unlock(&tasklist_lock
);
1553 /* rcu lock must be held */
1554 static int check_prlimit_permission(struct task_struct
*task
,
1557 const struct cred
*cred
= current_cred(), *tcred
;
1560 if (current
== task
)
1563 tcred
= __task_cred(task
);
1564 id_match
= (uid_eq(cred
->uid
, tcred
->euid
) &&
1565 uid_eq(cred
->uid
, tcred
->suid
) &&
1566 uid_eq(cred
->uid
, tcred
->uid
) &&
1567 gid_eq(cred
->gid
, tcred
->egid
) &&
1568 gid_eq(cred
->gid
, tcred
->sgid
) &&
1569 gid_eq(cred
->gid
, tcred
->gid
));
1570 if (!id_match
&& !ns_capable(tcred
->user_ns
, CAP_SYS_RESOURCE
))
1573 return security_task_prlimit(cred
, tcred
, flags
);
1576 SYSCALL_DEFINE4(prlimit64
, pid_t
, pid
, unsigned int, resource
,
1577 const struct rlimit64 __user
*, new_rlim
,
1578 struct rlimit64 __user
*, old_rlim
)
1580 struct rlimit64 old64
, new64
;
1581 struct rlimit old
, new;
1582 struct task_struct
*tsk
;
1583 unsigned int checkflags
= 0;
1587 checkflags
|= LSM_PRLIMIT_READ
;
1590 if (copy_from_user(&new64
, new_rlim
, sizeof(new64
)))
1592 rlim64_to_rlim(&new64
, &new);
1593 checkflags
|= LSM_PRLIMIT_WRITE
;
1597 tsk
= pid
? find_task_by_vpid(pid
) : current
;
1602 ret
= check_prlimit_permission(tsk
, checkflags
);
1607 get_task_struct(tsk
);
1610 ret
= do_prlimit(tsk
, resource
, new_rlim
? &new : NULL
,
1611 old_rlim
? &old
: NULL
);
1613 if (!ret
&& old_rlim
) {
1614 rlim_to_rlim64(&old
, &old64
);
1615 if (copy_to_user(old_rlim
, &old64
, sizeof(old64
)))
1619 put_task_struct(tsk
);
1623 SYSCALL_DEFINE2(setrlimit
, unsigned int, resource
, struct rlimit __user
*, rlim
)
1625 struct rlimit new_rlim
;
1627 if (copy_from_user(&new_rlim
, rlim
, sizeof(*rlim
)))
1629 return do_prlimit(current
, resource
, &new_rlim
, NULL
);
1633 * It would make sense to put struct rusage in the task_struct,
1634 * except that would make the task_struct be *really big*. After
1635 * task_struct gets moved into malloc'ed memory, it would
1636 * make sense to do this. It will make moving the rest of the information
1637 * a lot simpler! (Which we're not doing right now because we're not
1638 * measuring them yet).
1640 * When sampling multiple threads for RUSAGE_SELF, under SMP we might have
1641 * races with threads incrementing their own counters. But since word
1642 * reads are atomic, we either get new values or old values and we don't
1643 * care which for the sums. We always take the siglock to protect reading
1644 * the c* fields from p->signal from races with exit.c updating those
1645 * fields when reaping, so a sample either gets all the additions of a
1646 * given child after it's reaped, or none so this sample is before reaping.
1649 * We need to take the siglock for CHILDEREN, SELF and BOTH
1650 * for the cases current multithreaded, non-current single threaded
1651 * non-current multithreaded. Thread traversal is now safe with
1653 * Strictly speaking, we donot need to take the siglock if we are current and
1654 * single threaded, as no one else can take our signal_struct away, no one
1655 * else can reap the children to update signal->c* counters, and no one else
1656 * can race with the signal-> fields. If we do not take any lock, the
1657 * signal-> fields could be read out of order while another thread was just
1658 * exiting. So we should place a read memory barrier when we avoid the lock.
1659 * On the writer side, write memory barrier is implied in __exit_signal
1660 * as __exit_signal releases the siglock spinlock after updating the signal->
1661 * fields. But we don't do this yet to keep things simple.
1665 static void accumulate_thread_rusage(struct task_struct
*t
, struct rusage
*r
)
1667 r
->ru_nvcsw
+= t
->nvcsw
;
1668 r
->ru_nivcsw
+= t
->nivcsw
;
1669 r
->ru_minflt
+= t
->min_flt
;
1670 r
->ru_majflt
+= t
->maj_flt
;
1671 r
->ru_inblock
+= task_io_get_inblock(t
);
1672 r
->ru_oublock
+= task_io_get_oublock(t
);
1675 void getrusage(struct task_struct
*p
, int who
, struct rusage
*r
)
1677 struct task_struct
*t
;
1678 unsigned long flags
;
1679 u64 tgutime
, tgstime
, utime
, stime
;
1680 unsigned long maxrss
= 0;
1682 memset((char *)r
, 0, sizeof (*r
));
1685 if (who
== RUSAGE_THREAD
) {
1686 task_cputime_adjusted(current
, &utime
, &stime
);
1687 accumulate_thread_rusage(p
, r
);
1688 maxrss
= p
->signal
->maxrss
;
1692 if (!lock_task_sighand(p
, &flags
))
1697 case RUSAGE_CHILDREN
:
1698 utime
= p
->signal
->cutime
;
1699 stime
= p
->signal
->cstime
;
1700 r
->ru_nvcsw
= p
->signal
->cnvcsw
;
1701 r
->ru_nivcsw
= p
->signal
->cnivcsw
;
1702 r
->ru_minflt
= p
->signal
->cmin_flt
;
1703 r
->ru_majflt
= p
->signal
->cmaj_flt
;
1704 r
->ru_inblock
= p
->signal
->cinblock
;
1705 r
->ru_oublock
= p
->signal
->coublock
;
1706 maxrss
= p
->signal
->cmaxrss
;
1708 if (who
== RUSAGE_CHILDREN
)
1712 thread_group_cputime_adjusted(p
, &tgutime
, &tgstime
);
1715 r
->ru_nvcsw
+= p
->signal
->nvcsw
;
1716 r
->ru_nivcsw
+= p
->signal
->nivcsw
;
1717 r
->ru_minflt
+= p
->signal
->min_flt
;
1718 r
->ru_majflt
+= p
->signal
->maj_flt
;
1719 r
->ru_inblock
+= p
->signal
->inblock
;
1720 r
->ru_oublock
+= p
->signal
->oublock
;
1721 if (maxrss
< p
->signal
->maxrss
)
1722 maxrss
= p
->signal
->maxrss
;
1725 accumulate_thread_rusage(t
, r
);
1726 } while_each_thread(p
, t
);
1732 unlock_task_sighand(p
, &flags
);
1735 r
->ru_utime
= ns_to_timeval(utime
);
1736 r
->ru_stime
= ns_to_timeval(stime
);
1738 if (who
!= RUSAGE_CHILDREN
) {
1739 struct mm_struct
*mm
= get_task_mm(p
);
1742 setmax_mm_hiwater_rss(&maxrss
, mm
);
1746 r
->ru_maxrss
= maxrss
* (PAGE_SIZE
/ 1024); /* convert pages to KBs */
1749 SYSCALL_DEFINE2(getrusage
, int, who
, struct rusage __user
*, ru
)
1753 if (who
!= RUSAGE_SELF
&& who
!= RUSAGE_CHILDREN
&&
1754 who
!= RUSAGE_THREAD
)
1757 getrusage(current
, who
, &r
);
1758 return copy_to_user(ru
, &r
, sizeof(r
)) ? -EFAULT
: 0;
1761 #ifdef CONFIG_COMPAT
1762 COMPAT_SYSCALL_DEFINE2(getrusage
, int, who
, struct compat_rusage __user
*, ru
)
1766 if (who
!= RUSAGE_SELF
&& who
!= RUSAGE_CHILDREN
&&
1767 who
!= RUSAGE_THREAD
)
1770 getrusage(current
, who
, &r
);
1771 return put_compat_rusage(&r
, ru
);
1775 SYSCALL_DEFINE1(umask
, int, mask
)
1777 mask
= xchg(¤t
->fs
->umask
, mask
& S_IRWXUGO
);
1781 static int prctl_set_mm_exe_file(struct mm_struct
*mm
, unsigned int fd
)
1784 struct file
*old_exe
, *exe_file
;
1785 struct inode
*inode
;
1792 inode
= file_inode(exe
.file
);
1795 * Because the original mm->exe_file points to executable file, make
1796 * sure that this one is executable as well, to avoid breaking an
1800 if (!S_ISREG(inode
->i_mode
) || path_noexec(&exe
.file
->f_path
))
1803 err
= inode_permission(inode
, MAY_EXEC
);
1808 * Forbid mm->exe_file change if old file still mapped.
1810 exe_file
= get_mm_exe_file(mm
);
1813 struct vm_area_struct
*vma
;
1815 down_read(&mm
->mmap_sem
);
1816 for (vma
= mm
->mmap
; vma
; vma
= vma
->vm_next
) {
1819 if (path_equal(&vma
->vm_file
->f_path
,
1824 up_read(&mm
->mmap_sem
);
1829 /* set the new file, lockless */
1831 old_exe
= xchg(&mm
->exe_file
, exe
.file
);
1838 up_read(&mm
->mmap_sem
);
1844 * WARNING: we don't require any capability here so be very careful
1845 * in what is allowed for modification from userspace.
1847 static int validate_prctl_map(struct prctl_mm_map
*prctl_map
)
1849 unsigned long mmap_max_addr
= TASK_SIZE
;
1850 struct mm_struct
*mm
= current
->mm
;
1851 int error
= -EINVAL
, i
;
1853 static const unsigned char offsets
[] = {
1854 offsetof(struct prctl_mm_map
, start_code
),
1855 offsetof(struct prctl_mm_map
, end_code
),
1856 offsetof(struct prctl_mm_map
, start_data
),
1857 offsetof(struct prctl_mm_map
, end_data
),
1858 offsetof(struct prctl_mm_map
, start_brk
),
1859 offsetof(struct prctl_mm_map
, brk
),
1860 offsetof(struct prctl_mm_map
, start_stack
),
1861 offsetof(struct prctl_mm_map
, arg_start
),
1862 offsetof(struct prctl_mm_map
, arg_end
),
1863 offsetof(struct prctl_mm_map
, env_start
),
1864 offsetof(struct prctl_mm_map
, env_end
),
1868 * Make sure the members are not somewhere outside
1869 * of allowed address space.
1871 for (i
= 0; i
< ARRAY_SIZE(offsets
); i
++) {
1872 u64 val
= *(u64
*)((char *)prctl_map
+ offsets
[i
]);
1874 if ((unsigned long)val
>= mmap_max_addr
||
1875 (unsigned long)val
< mmap_min_addr
)
1880 * Make sure the pairs are ordered.
1882 #define __prctl_check_order(__m1, __op, __m2) \
1883 ((unsigned long)prctl_map->__m1 __op \
1884 (unsigned long)prctl_map->__m2) ? 0 : -EINVAL
1885 error
= __prctl_check_order(start_code
, <, end_code
);
1886 error
|= __prctl_check_order(start_data
, <, end_data
);
1887 error
|= __prctl_check_order(start_brk
, <=, brk
);
1888 error
|= __prctl_check_order(arg_start
, <=, arg_end
);
1889 error
|= __prctl_check_order(env_start
, <=, env_end
);
1892 #undef __prctl_check_order
1897 * @brk should be after @end_data in traditional maps.
1899 if (prctl_map
->start_brk
<= prctl_map
->end_data
||
1900 prctl_map
->brk
<= prctl_map
->end_data
)
1904 * Neither we should allow to override limits if they set.
1906 if (check_data_rlimit(rlimit(RLIMIT_DATA
), prctl_map
->brk
,
1907 prctl_map
->start_brk
, prctl_map
->end_data
,
1908 prctl_map
->start_data
))
1912 * Someone is trying to cheat the auxv vector.
1914 if (prctl_map
->auxv_size
) {
1915 if (!prctl_map
->auxv
|| prctl_map
->auxv_size
> sizeof(mm
->saved_auxv
))
1920 * Finally, make sure the caller has the rights to
1921 * change /proc/pid/exe link: only local sys admin should
1924 if (prctl_map
->exe_fd
!= (u32
)-1) {
1925 if (!ns_capable(current_user_ns(), CAP_SYS_ADMIN
))
1934 #ifdef CONFIG_CHECKPOINT_RESTORE
1935 static int prctl_set_mm_map(int opt
, const void __user
*addr
, unsigned long data_size
)
1937 struct prctl_mm_map prctl_map
= { .exe_fd
= (u32
)-1, };
1938 unsigned long user_auxv
[AT_VECTOR_SIZE
];
1939 struct mm_struct
*mm
= current
->mm
;
1942 BUILD_BUG_ON(sizeof(user_auxv
) != sizeof(mm
->saved_auxv
));
1943 BUILD_BUG_ON(sizeof(struct prctl_mm_map
) > 256);
1945 if (opt
== PR_SET_MM_MAP_SIZE
)
1946 return put_user((unsigned int)sizeof(prctl_map
),
1947 (unsigned int __user
*)addr
);
1949 if (data_size
!= sizeof(prctl_map
))
1952 if (copy_from_user(&prctl_map
, addr
, sizeof(prctl_map
)))
1955 error
= validate_prctl_map(&prctl_map
);
1959 if (prctl_map
.auxv_size
) {
1960 memset(user_auxv
, 0, sizeof(user_auxv
));
1961 if (copy_from_user(user_auxv
,
1962 (const void __user
*)prctl_map
.auxv
,
1963 prctl_map
.auxv_size
))
1966 /* Last entry must be AT_NULL as specification requires */
1967 user_auxv
[AT_VECTOR_SIZE
- 2] = AT_NULL
;
1968 user_auxv
[AT_VECTOR_SIZE
- 1] = AT_NULL
;
1971 if (prctl_map
.exe_fd
!= (u32
)-1) {
1972 error
= prctl_set_mm_exe_file(mm
, prctl_map
.exe_fd
);
1977 down_write(&mm
->mmap_sem
);
1980 * We don't validate if these members are pointing to
1981 * real present VMAs because application may have correspond
1982 * VMAs already unmapped and kernel uses these members for statistics
1983 * output in procfs mostly, except
1985 * - @start_brk/@brk which are used in do_brk but kernel lookups
1986 * for VMAs when updating these memvers so anything wrong written
1987 * here cause kernel to swear at userspace program but won't lead
1988 * to any problem in kernel itself
1991 mm
->start_code
= prctl_map
.start_code
;
1992 mm
->end_code
= prctl_map
.end_code
;
1993 mm
->start_data
= prctl_map
.start_data
;
1994 mm
->end_data
= prctl_map
.end_data
;
1995 mm
->start_brk
= prctl_map
.start_brk
;
1996 mm
->brk
= prctl_map
.brk
;
1997 mm
->start_stack
= prctl_map
.start_stack
;
1998 mm
->arg_start
= prctl_map
.arg_start
;
1999 mm
->arg_end
= prctl_map
.arg_end
;
2000 mm
->env_start
= prctl_map
.env_start
;
2001 mm
->env_end
= prctl_map
.env_end
;
2004 * Note this update of @saved_auxv is lockless thus
2005 * if someone reads this member in procfs while we're
2006 * updating -- it may get partly updated results. It's
2007 * known and acceptable trade off: we leave it as is to
2008 * not introduce additional locks here making the kernel
2011 if (prctl_map
.auxv_size
)
2012 memcpy(mm
->saved_auxv
, user_auxv
, sizeof(user_auxv
));
2014 up_write(&mm
->mmap_sem
);
2017 #endif /* CONFIG_CHECKPOINT_RESTORE */
2019 static int prctl_set_auxv(struct mm_struct
*mm
, unsigned long addr
,
2023 * This doesn't move the auxiliary vector itself since it's pinned to
2024 * mm_struct, but it permits filling the vector with new values. It's
2025 * up to the caller to provide sane values here, otherwise userspace
2026 * tools which use this vector might be unhappy.
2028 unsigned long user_auxv
[AT_VECTOR_SIZE
];
2030 if (len
> sizeof(user_auxv
))
2033 if (copy_from_user(user_auxv
, (const void __user
*)addr
, len
))
2036 /* Make sure the last entry is always AT_NULL */
2037 user_auxv
[AT_VECTOR_SIZE
- 2] = 0;
2038 user_auxv
[AT_VECTOR_SIZE
- 1] = 0;
2040 BUILD_BUG_ON(sizeof(user_auxv
) != sizeof(mm
->saved_auxv
));
2043 memcpy(mm
->saved_auxv
, user_auxv
, len
);
2044 task_unlock(current
);
2049 static int prctl_set_mm(int opt
, unsigned long addr
,
2050 unsigned long arg4
, unsigned long arg5
)
2052 struct mm_struct
*mm
= current
->mm
;
2053 struct prctl_mm_map prctl_map
;
2054 struct vm_area_struct
*vma
;
2057 if (arg5
|| (arg4
&& (opt
!= PR_SET_MM_AUXV
&&
2058 opt
!= PR_SET_MM_MAP
&&
2059 opt
!= PR_SET_MM_MAP_SIZE
)))
2062 #ifdef CONFIG_CHECKPOINT_RESTORE
2063 if (opt
== PR_SET_MM_MAP
|| opt
== PR_SET_MM_MAP_SIZE
)
2064 return prctl_set_mm_map(opt
, (const void __user
*)addr
, arg4
);
2067 if (!capable(CAP_SYS_RESOURCE
))
2070 if (opt
== PR_SET_MM_EXE_FILE
)
2071 return prctl_set_mm_exe_file(mm
, (unsigned int)addr
);
2073 if (opt
== PR_SET_MM_AUXV
)
2074 return prctl_set_auxv(mm
, addr
, arg4
);
2076 if (addr
>= TASK_SIZE
|| addr
< mmap_min_addr
)
2081 down_write(&mm
->mmap_sem
);
2082 vma
= find_vma(mm
, addr
);
2084 prctl_map
.start_code
= mm
->start_code
;
2085 prctl_map
.end_code
= mm
->end_code
;
2086 prctl_map
.start_data
= mm
->start_data
;
2087 prctl_map
.end_data
= mm
->end_data
;
2088 prctl_map
.start_brk
= mm
->start_brk
;
2089 prctl_map
.brk
= mm
->brk
;
2090 prctl_map
.start_stack
= mm
->start_stack
;
2091 prctl_map
.arg_start
= mm
->arg_start
;
2092 prctl_map
.arg_end
= mm
->arg_end
;
2093 prctl_map
.env_start
= mm
->env_start
;
2094 prctl_map
.env_end
= mm
->env_end
;
2095 prctl_map
.auxv
= NULL
;
2096 prctl_map
.auxv_size
= 0;
2097 prctl_map
.exe_fd
= -1;
2100 case PR_SET_MM_START_CODE
:
2101 prctl_map
.start_code
= addr
;
2103 case PR_SET_MM_END_CODE
:
2104 prctl_map
.end_code
= addr
;
2106 case PR_SET_MM_START_DATA
:
2107 prctl_map
.start_data
= addr
;
2109 case PR_SET_MM_END_DATA
:
2110 prctl_map
.end_data
= addr
;
2112 case PR_SET_MM_START_STACK
:
2113 prctl_map
.start_stack
= addr
;
2115 case PR_SET_MM_START_BRK
:
2116 prctl_map
.start_brk
= addr
;
2119 prctl_map
.brk
= addr
;
2121 case PR_SET_MM_ARG_START
:
2122 prctl_map
.arg_start
= addr
;
2124 case PR_SET_MM_ARG_END
:
2125 prctl_map
.arg_end
= addr
;
2127 case PR_SET_MM_ENV_START
:
2128 prctl_map
.env_start
= addr
;
2130 case PR_SET_MM_ENV_END
:
2131 prctl_map
.env_end
= addr
;
2137 error
= validate_prctl_map(&prctl_map
);
2143 * If command line arguments and environment
2144 * are placed somewhere else on stack, we can
2145 * set them up here, ARG_START/END to setup
2146 * command line argumets and ENV_START/END
2149 case PR_SET_MM_START_STACK
:
2150 case PR_SET_MM_ARG_START
:
2151 case PR_SET_MM_ARG_END
:
2152 case PR_SET_MM_ENV_START
:
2153 case PR_SET_MM_ENV_END
:
2160 mm
->start_code
= prctl_map
.start_code
;
2161 mm
->end_code
= prctl_map
.end_code
;
2162 mm
->start_data
= prctl_map
.start_data
;
2163 mm
->end_data
= prctl_map
.end_data
;
2164 mm
->start_brk
= prctl_map
.start_brk
;
2165 mm
->brk
= prctl_map
.brk
;
2166 mm
->start_stack
= prctl_map
.start_stack
;
2167 mm
->arg_start
= prctl_map
.arg_start
;
2168 mm
->arg_end
= prctl_map
.arg_end
;
2169 mm
->env_start
= prctl_map
.env_start
;
2170 mm
->env_end
= prctl_map
.env_end
;
2174 up_write(&mm
->mmap_sem
);
2178 #ifdef CONFIG_CHECKPOINT_RESTORE
2179 static int prctl_get_tid_address(struct task_struct
*me
, int __user
**tid_addr
)
2181 return put_user(me
->clear_child_tid
, tid_addr
);
2184 static int prctl_get_tid_address(struct task_struct
*me
, int __user
**tid_addr
)
2190 static int propagate_has_child_subreaper(struct task_struct
*p
, void *data
)
2193 * If task has has_child_subreaper - all its decendants
2194 * already have these flag too and new decendants will
2195 * inherit it on fork, skip them.
2197 * If we've found child_reaper - skip descendants in
2198 * it's subtree as they will never get out pidns.
2200 if (p
->signal
->has_child_subreaper
||
2201 is_child_reaper(task_pid(p
)))
2204 p
->signal
->has_child_subreaper
= 1;
2208 SYSCALL_DEFINE5(prctl
, int, option
, unsigned long, arg2
, unsigned long, arg3
,
2209 unsigned long, arg4
, unsigned long, arg5
)
2211 struct task_struct
*me
= current
;
2212 unsigned char comm
[sizeof(me
->comm
)];
2215 error
= security_task_prctl(option
, arg2
, arg3
, arg4
, arg5
);
2216 if (error
!= -ENOSYS
)
2221 case PR_SET_PDEATHSIG
:
2222 if (!valid_signal(arg2
)) {
2226 me
->pdeath_signal
= arg2
;
2228 case PR_GET_PDEATHSIG
:
2229 error
= put_user(me
->pdeath_signal
, (int __user
*)arg2
);
2231 case PR_GET_DUMPABLE
:
2232 error
= get_dumpable(me
->mm
);
2234 case PR_SET_DUMPABLE
:
2235 if (arg2
!= SUID_DUMP_DISABLE
&& arg2
!= SUID_DUMP_USER
) {
2239 set_dumpable(me
->mm
, arg2
);
2242 case PR_SET_UNALIGN
:
2243 error
= SET_UNALIGN_CTL(me
, arg2
);
2245 case PR_GET_UNALIGN
:
2246 error
= GET_UNALIGN_CTL(me
, arg2
);
2249 error
= SET_FPEMU_CTL(me
, arg2
);
2252 error
= GET_FPEMU_CTL(me
, arg2
);
2255 error
= SET_FPEXC_CTL(me
, arg2
);
2258 error
= GET_FPEXC_CTL(me
, arg2
);
2261 error
= PR_TIMING_STATISTICAL
;
2264 if (arg2
!= PR_TIMING_STATISTICAL
)
2268 comm
[sizeof(me
->comm
) - 1] = 0;
2269 if (strncpy_from_user(comm
, (char __user
*)arg2
,
2270 sizeof(me
->comm
) - 1) < 0)
2272 set_task_comm(me
, comm
);
2273 proc_comm_connector(me
);
2276 get_task_comm(comm
, me
);
2277 if (copy_to_user((char __user
*)arg2
, comm
, sizeof(comm
)))
2281 error
= GET_ENDIAN(me
, arg2
);
2284 error
= SET_ENDIAN(me
, arg2
);
2286 case PR_GET_SECCOMP
:
2287 error
= prctl_get_seccomp();
2289 case PR_SET_SECCOMP
:
2290 error
= prctl_set_seccomp(arg2
, (char __user
*)arg3
);
2293 error
= GET_TSC_CTL(arg2
);
2296 error
= SET_TSC_CTL(arg2
);
2298 case PR_TASK_PERF_EVENTS_DISABLE
:
2299 error
= perf_event_task_disable();
2301 case PR_TASK_PERF_EVENTS_ENABLE
:
2302 error
= perf_event_task_enable();
2304 case PR_GET_TIMERSLACK
:
2305 if (current
->timer_slack_ns
> ULONG_MAX
)
2308 error
= current
->timer_slack_ns
;
2310 case PR_SET_TIMERSLACK
:
2312 current
->timer_slack_ns
=
2313 current
->default_timer_slack_ns
;
2315 current
->timer_slack_ns
= arg2
;
2321 case PR_MCE_KILL_CLEAR
:
2324 current
->flags
&= ~PF_MCE_PROCESS
;
2326 case PR_MCE_KILL_SET
:
2327 current
->flags
|= PF_MCE_PROCESS
;
2328 if (arg3
== PR_MCE_KILL_EARLY
)
2329 current
->flags
|= PF_MCE_EARLY
;
2330 else if (arg3
== PR_MCE_KILL_LATE
)
2331 current
->flags
&= ~PF_MCE_EARLY
;
2332 else if (arg3
== PR_MCE_KILL_DEFAULT
)
2334 ~(PF_MCE_EARLY
|PF_MCE_PROCESS
);
2342 case PR_MCE_KILL_GET
:
2343 if (arg2
| arg3
| arg4
| arg5
)
2345 if (current
->flags
& PF_MCE_PROCESS
)
2346 error
= (current
->flags
& PF_MCE_EARLY
) ?
2347 PR_MCE_KILL_EARLY
: PR_MCE_KILL_LATE
;
2349 error
= PR_MCE_KILL_DEFAULT
;
2352 error
= prctl_set_mm(arg2
, arg3
, arg4
, arg5
);
2354 case PR_GET_TID_ADDRESS
:
2355 error
= prctl_get_tid_address(me
, (int __user
**)arg2
);
2357 case PR_SET_CHILD_SUBREAPER
:
2358 me
->signal
->is_child_subreaper
= !!arg2
;
2362 walk_process_tree(me
, propagate_has_child_subreaper
, NULL
);
2364 case PR_GET_CHILD_SUBREAPER
:
2365 error
= put_user(me
->signal
->is_child_subreaper
,
2366 (int __user
*)arg2
);
2368 case PR_SET_NO_NEW_PRIVS
:
2369 if (arg2
!= 1 || arg3
|| arg4
|| arg5
)
2372 task_set_no_new_privs(current
);
2374 case PR_GET_NO_NEW_PRIVS
:
2375 if (arg2
|| arg3
|| arg4
|| arg5
)
2377 return task_no_new_privs(current
) ? 1 : 0;
2378 case PR_GET_THP_DISABLE
:
2379 if (arg2
|| arg3
|| arg4
|| arg5
)
2381 error
= !!test_bit(MMF_DISABLE_THP
, &me
->mm
->flags
);
2383 case PR_SET_THP_DISABLE
:
2384 if (arg3
|| arg4
|| arg5
)
2386 if (down_write_killable(&me
->mm
->mmap_sem
))
2389 set_bit(MMF_DISABLE_THP
, &me
->mm
->flags
);
2391 clear_bit(MMF_DISABLE_THP
, &me
->mm
->flags
);
2392 up_write(&me
->mm
->mmap_sem
);
2394 case PR_MPX_ENABLE_MANAGEMENT
:
2395 if (arg2
|| arg3
|| arg4
|| arg5
)
2397 error
= MPX_ENABLE_MANAGEMENT();
2399 case PR_MPX_DISABLE_MANAGEMENT
:
2400 if (arg2
|| arg3
|| arg4
|| arg5
)
2402 error
= MPX_DISABLE_MANAGEMENT();
2404 case PR_SET_FP_MODE
:
2405 error
= SET_FP_MODE(me
, arg2
);
2407 case PR_GET_FP_MODE
:
2408 error
= GET_FP_MODE(me
);
2411 error
= SVE_SET_VL(arg2
);
2414 error
= SVE_GET_VL();
2423 SYSCALL_DEFINE3(getcpu
, unsigned __user
*, cpup
, unsigned __user
*, nodep
,
2424 struct getcpu_cache __user
*, unused
)
2427 int cpu
= raw_smp_processor_id();
2430 err
|= put_user(cpu
, cpup
);
2432 err
|= put_user(cpu_to_node(cpu
), nodep
);
2433 return err
? -EFAULT
: 0;
2437 * do_sysinfo - fill in sysinfo struct
2438 * @info: pointer to buffer to fill
2440 static int do_sysinfo(struct sysinfo
*info
)
2442 unsigned long mem_total
, sav_total
;
2443 unsigned int mem_unit
, bitcount
;
2446 memset(info
, 0, sizeof(struct sysinfo
));
2448 get_monotonic_boottime(&tp
);
2449 info
->uptime
= tp
.tv_sec
+ (tp
.tv_nsec
? 1 : 0);
2451 get_avenrun(info
->loads
, 0, SI_LOAD_SHIFT
- FSHIFT
);
2453 info
->procs
= nr_threads
;
2459 * If the sum of all the available memory (i.e. ram + swap)
2460 * is less than can be stored in a 32 bit unsigned long then
2461 * we can be binary compatible with 2.2.x kernels. If not,
2462 * well, in that case 2.2.x was broken anyways...
2464 * -Erik Andersen <andersee@debian.org>
2467 mem_total
= info
->totalram
+ info
->totalswap
;
2468 if (mem_total
< info
->totalram
|| mem_total
< info
->totalswap
)
2471 mem_unit
= info
->mem_unit
;
2472 while (mem_unit
> 1) {
2475 sav_total
= mem_total
;
2477 if (mem_total
< sav_total
)
2482 * If mem_total did not overflow, multiply all memory values by
2483 * info->mem_unit and set it to 1. This leaves things compatible
2484 * with 2.2.x, and also retains compatibility with earlier 2.4.x
2489 info
->totalram
<<= bitcount
;
2490 info
->freeram
<<= bitcount
;
2491 info
->sharedram
<<= bitcount
;
2492 info
->bufferram
<<= bitcount
;
2493 info
->totalswap
<<= bitcount
;
2494 info
->freeswap
<<= bitcount
;
2495 info
->totalhigh
<<= bitcount
;
2496 info
->freehigh
<<= bitcount
;
2502 SYSCALL_DEFINE1(sysinfo
, struct sysinfo __user
*, info
)
2508 if (copy_to_user(info
, &val
, sizeof(struct sysinfo
)))
2514 #ifdef CONFIG_COMPAT
2515 struct compat_sysinfo
{
2529 char _f
[20-2*sizeof(u32
)-sizeof(int)];
2532 COMPAT_SYSCALL_DEFINE1(sysinfo
, struct compat_sysinfo __user
*, info
)
2538 /* Check to see if any memory value is too large for 32-bit and scale
2541 if (upper_32_bits(s
.totalram
) || upper_32_bits(s
.totalswap
)) {
2544 while (s
.mem_unit
< PAGE_SIZE
) {
2549 s
.totalram
>>= bitcount
;
2550 s
.freeram
>>= bitcount
;
2551 s
.sharedram
>>= bitcount
;
2552 s
.bufferram
>>= bitcount
;
2553 s
.totalswap
>>= bitcount
;
2554 s
.freeswap
>>= bitcount
;
2555 s
.totalhigh
>>= bitcount
;
2556 s
.freehigh
>>= bitcount
;
2559 if (!access_ok(VERIFY_WRITE
, info
, sizeof(struct compat_sysinfo
)) ||
2560 __put_user(s
.uptime
, &info
->uptime
) ||
2561 __put_user(s
.loads
[0], &info
->loads
[0]) ||
2562 __put_user(s
.loads
[1], &info
->loads
[1]) ||
2563 __put_user(s
.loads
[2], &info
->loads
[2]) ||
2564 __put_user(s
.totalram
, &info
->totalram
) ||
2565 __put_user(s
.freeram
, &info
->freeram
) ||
2566 __put_user(s
.sharedram
, &info
->sharedram
) ||
2567 __put_user(s
.bufferram
, &info
->bufferram
) ||
2568 __put_user(s
.totalswap
, &info
->totalswap
) ||
2569 __put_user(s
.freeswap
, &info
->freeswap
) ||
2570 __put_user(s
.procs
, &info
->procs
) ||
2571 __put_user(s
.totalhigh
, &info
->totalhigh
) ||
2572 __put_user(s
.freehigh
, &info
->freehigh
) ||
2573 __put_user(s
.mem_unit
, &info
->mem_unit
))
2578 #endif /* CONFIG_COMPAT */