1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 1991, 1992 Linus Torvalds
8 #include <linux/syscalls.h>
9 #include <linux/init.h>
11 #include <linux/sched/task.h>
13 #include <linux/filelock.h>
14 #include <linux/file.h>
15 #include <linux/fdtable.h>
16 #include <linux/capability.h>
17 #include <linux/dnotify.h>
18 #include <linux/slab.h>
19 #include <linux/module.h>
20 #include <linux/pipe_fs_i.h>
21 #include <linux/security.h>
22 #include <linux/ptrace.h>
23 #include <linux/signal.h>
24 #include <linux/rcupdate.h>
25 #include <linux/pid_namespace.h>
26 #include <linux/user_namespace.h>
27 #include <linux/memfd.h>
28 #include <linux/compat.h>
29 #include <linux/mount.h>
30 #include <linux/rw_hint.h>
32 #include <linux/poll.h>
33 #include <asm/siginfo.h>
34 #include <linux/uaccess.h>
36 #define SETFL_MASK (O_APPEND | O_NONBLOCK | O_NDELAY | O_DIRECT | O_NOATIME)
38 static int setfl(int fd, struct file * filp, unsigned int arg)
40 struct inode * inode = file_inode(filp);
44 * O_APPEND cannot be cleared if the file is marked as append-only
45 * and the file is open for write.
47 if (((arg ^ filp->f_flags) & O_APPEND) && IS_APPEND(inode))
50 /* O_NOATIME can only be set by the owner or superuser */
51 if ((arg & O_NOATIME) && !(filp->f_flags & O_NOATIME))
52 if (!inode_owner_or_capable(file_mnt_idmap(filp), inode))
55 /* required for strict SunOS emulation */
56 if (O_NONBLOCK != O_NDELAY)
60 /* Pipe packetized mode is controlled by O_DIRECT flag */
61 if (!S_ISFIFO(inode->i_mode) &&
63 !(filp->f_mode & FMODE_CAN_ODIRECT))
66 if (filp->f_op->check_flags)
67 error = filp->f_op->check_flags(arg);
72 * ->fasync() is responsible for setting the FASYNC bit.
74 if (((arg ^ filp->f_flags) & FASYNC) && filp->f_op->fasync) {
75 error = filp->f_op->fasync(fd, filp, (arg & FASYNC) != 0);
81 spin_lock(&filp->f_lock);
82 filp->f_flags = (arg & SETFL_MASK) | (filp->f_flags & ~SETFL_MASK);
83 filp->f_iocb_flags = iocb_flags(filp);
84 spin_unlock(&filp->f_lock);
90 static void f_modown(struct file *filp, struct pid *pid, enum pid_type type,
93 write_lock_irq(&filp->f_owner.lock);
94 if (force || !filp->f_owner.pid) {
95 put_pid(filp->f_owner.pid);
96 filp->f_owner.pid = get_pid(pid);
97 filp->f_owner.pid_type = type;
100 const struct cred *cred = current_cred();
101 filp->f_owner.uid = cred->uid;
102 filp->f_owner.euid = cred->euid;
105 write_unlock_irq(&filp->f_owner.lock);
108 void __f_setown(struct file *filp, struct pid *pid, enum pid_type type,
111 security_file_set_fowner(filp);
112 f_modown(filp, pid, type, force);
114 EXPORT_SYMBOL(__f_setown);
116 int f_setown(struct file *filp, int who, int force)
119 struct pid *pid = NULL;
124 /* avoid overflow below */
134 pid = find_vpid(who);
140 __f_setown(filp, pid, type, force);
145 EXPORT_SYMBOL(f_setown);
147 void f_delown(struct file *filp)
149 f_modown(filp, NULL, PIDTYPE_TGID, 1);
152 pid_t f_getown(struct file *filp)
156 read_lock_irq(&filp->f_owner.lock);
158 if (pid_task(filp->f_owner.pid, filp->f_owner.pid_type)) {
159 pid = pid_vnr(filp->f_owner.pid);
160 if (filp->f_owner.pid_type == PIDTYPE_PGID)
164 read_unlock_irq(&filp->f_owner.lock);
168 static int f_setown_ex(struct file *filp, unsigned long arg)
170 struct f_owner_ex __user *owner_p = (void __user *)arg;
171 struct f_owner_ex owner;
176 ret = copy_from_user(&owner, owner_p, sizeof(owner));
180 switch (owner.type) {
198 pid = find_vpid(owner.pid);
199 if (owner.pid && !pid)
202 __f_setown(filp, pid, type, 1);
208 static int f_getown_ex(struct file *filp, unsigned long arg)
210 struct f_owner_ex __user *owner_p = (void __user *)arg;
211 struct f_owner_ex owner = {};
214 read_lock_irq(&filp->f_owner.lock);
216 if (pid_task(filp->f_owner.pid, filp->f_owner.pid_type))
217 owner.pid = pid_vnr(filp->f_owner.pid);
219 switch (filp->f_owner.pid_type) {
221 owner.type = F_OWNER_TID;
225 owner.type = F_OWNER_PID;
229 owner.type = F_OWNER_PGRP;
237 read_unlock_irq(&filp->f_owner.lock);
240 ret = copy_to_user(owner_p, &owner, sizeof(owner));
247 #ifdef CONFIG_CHECKPOINT_RESTORE
248 static int f_getowner_uids(struct file *filp, unsigned long arg)
250 struct user_namespace *user_ns = current_user_ns();
251 uid_t __user *dst = (void __user *)arg;
255 read_lock_irq(&filp->f_owner.lock);
256 src[0] = from_kuid(user_ns, filp->f_owner.uid);
257 src[1] = from_kuid(user_ns, filp->f_owner.euid);
258 read_unlock_irq(&filp->f_owner.lock);
260 err = put_user(src[0], &dst[0]);
261 err |= put_user(src[1], &dst[1]);
266 static int f_getowner_uids(struct file *filp, unsigned long arg)
272 static bool rw_hint_valid(u64 hint)
274 BUILD_BUG_ON(WRITE_LIFE_NOT_SET != RWH_WRITE_LIFE_NOT_SET);
275 BUILD_BUG_ON(WRITE_LIFE_NONE != RWH_WRITE_LIFE_NONE);
276 BUILD_BUG_ON(WRITE_LIFE_SHORT != RWH_WRITE_LIFE_SHORT);
277 BUILD_BUG_ON(WRITE_LIFE_MEDIUM != RWH_WRITE_LIFE_MEDIUM);
278 BUILD_BUG_ON(WRITE_LIFE_LONG != RWH_WRITE_LIFE_LONG);
279 BUILD_BUG_ON(WRITE_LIFE_EXTREME != RWH_WRITE_LIFE_EXTREME);
282 case RWH_WRITE_LIFE_NOT_SET:
283 case RWH_WRITE_LIFE_NONE:
284 case RWH_WRITE_LIFE_SHORT:
285 case RWH_WRITE_LIFE_MEDIUM:
286 case RWH_WRITE_LIFE_LONG:
287 case RWH_WRITE_LIFE_EXTREME:
294 static long fcntl_get_rw_hint(struct file *file, unsigned int cmd,
297 struct inode *inode = file_inode(file);
298 u64 __user *argp = (u64 __user *)arg;
299 u64 hint = READ_ONCE(inode->i_write_hint);
301 if (copy_to_user(argp, &hint, sizeof(*argp)))
306 static long fcntl_set_rw_hint(struct file *file, unsigned int cmd,
309 struct inode *inode = file_inode(file);
310 u64 __user *argp = (u64 __user *)arg;
313 if (copy_from_user(&hint, argp, sizeof(hint)))
315 if (!rw_hint_valid(hint))
318 WRITE_ONCE(inode->i_write_hint, hint);
321 * file->f_mapping->host may differ from inode. As an example,
322 * blkdev_open() modifies file->f_mapping.
324 if (file->f_mapping->host != inode)
325 WRITE_ONCE(file->f_mapping->host->i_write_hint, hint);
330 static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
333 void __user *argp = (void __user *)arg;
340 err = f_dupfd(argi, filp, 0);
342 case F_DUPFD_CLOEXEC:
343 err = f_dupfd(argi, filp, O_CLOEXEC);
346 err = get_close_on_exec(fd) ? FD_CLOEXEC : 0;
350 set_close_on_exec(fd, argi & FD_CLOEXEC);
356 err = setfl(fd, filp, argi);
358 #if BITS_PER_LONG != 32
359 /* 32-bit arches must use fcntl64() */
363 if (copy_from_user(&flock, argp, sizeof(flock)))
365 err = fcntl_getlk(filp, cmd, &flock);
366 if (!err && copy_to_user(argp, &flock, sizeof(flock)))
369 #if BITS_PER_LONG != 32
370 /* 32-bit arches must use fcntl64() */
377 if (copy_from_user(&flock, argp, sizeof(flock)))
379 err = fcntl_setlk(fd, filp, cmd, &flock);
383 * XXX If f_owner is a process group, the
384 * negative return value will get converted
385 * into an error. Oops. If we keep the
386 * current syscall conventions, the only way
387 * to fix this will be in libc.
389 err = f_getown(filp);
390 force_successful_syscall_return();
393 err = f_setown(filp, argi, 1);
396 err = f_getown_ex(filp, arg);
399 err = f_setown_ex(filp, arg);
401 case F_GETOWNER_UIDS:
402 err = f_getowner_uids(filp, arg);
405 err = filp->f_owner.signum;
408 /* arg == 0 restores default behaviour. */
409 if (!valid_signal(argi)) {
413 filp->f_owner.signum = argi;
416 err = fcntl_getlease(filp);
419 err = fcntl_setlease(fd, filp, argi);
422 err = fcntl_dirnotify(fd, filp, argi);
426 err = pipe_fcntl(filp, cmd, argi);
430 err = memfd_fcntl(filp, cmd, argi);
433 err = fcntl_get_rw_hint(filp, cmd, arg);
436 err = fcntl_set_rw_hint(filp, cmd, arg);
444 static int check_fcntl_cmd(unsigned cmd)
448 case F_DUPFD_CLOEXEC:
457 SYSCALL_DEFINE3(fcntl, unsigned int, fd, unsigned int, cmd, unsigned long, arg)
459 struct fd f = fdget_raw(fd);
465 if (unlikely(f.file->f_mode & FMODE_PATH)) {
466 if (!check_fcntl_cmd(cmd))
470 err = security_file_fcntl(f.file, cmd, arg);
472 err = do_fcntl(fd, cmd, arg, f.file);
480 #if BITS_PER_LONG == 32
481 SYSCALL_DEFINE3(fcntl64, unsigned int, fd, unsigned int, cmd,
484 void __user *argp = (void __user *)arg;
485 struct fd f = fdget_raw(fd);
486 struct flock64 flock;
492 if (unlikely(f.file->f_mode & FMODE_PATH)) {
493 if (!check_fcntl_cmd(cmd))
497 err = security_file_fcntl(f.file, cmd, arg);
505 if (copy_from_user(&flock, argp, sizeof(flock)))
507 err = fcntl_getlk64(f.file, cmd, &flock);
508 if (!err && copy_to_user(argp, &flock, sizeof(flock)))
516 if (copy_from_user(&flock, argp, sizeof(flock)))
518 err = fcntl_setlk64(fd, f.file, cmd, &flock);
521 err = do_fcntl(fd, cmd, arg, f.file);
532 /* careful - don't use anywhere else */
533 #define copy_flock_fields(dst, src) \
534 (dst)->l_type = (src)->l_type; \
535 (dst)->l_whence = (src)->l_whence; \
536 (dst)->l_start = (src)->l_start; \
537 (dst)->l_len = (src)->l_len; \
538 (dst)->l_pid = (src)->l_pid;
540 static int get_compat_flock(struct flock *kfl, const struct compat_flock __user *ufl)
542 struct compat_flock fl;
544 if (copy_from_user(&fl, ufl, sizeof(struct compat_flock)))
546 copy_flock_fields(kfl, &fl);
550 static int get_compat_flock64(struct flock *kfl, const struct compat_flock64 __user *ufl)
552 struct compat_flock64 fl;
554 if (copy_from_user(&fl, ufl, sizeof(struct compat_flock64)))
556 copy_flock_fields(kfl, &fl);
560 static int put_compat_flock(const struct flock *kfl, struct compat_flock __user *ufl)
562 struct compat_flock fl;
564 memset(&fl, 0, sizeof(struct compat_flock));
565 copy_flock_fields(&fl, kfl);
566 if (copy_to_user(ufl, &fl, sizeof(struct compat_flock)))
571 static int put_compat_flock64(const struct flock *kfl, struct compat_flock64 __user *ufl)
573 struct compat_flock64 fl;
575 BUILD_BUG_ON(sizeof(kfl->l_start) > sizeof(ufl->l_start));
576 BUILD_BUG_ON(sizeof(kfl->l_len) > sizeof(ufl->l_len));
578 memset(&fl, 0, sizeof(struct compat_flock64));
579 copy_flock_fields(&fl, kfl);
580 if (copy_to_user(ufl, &fl, sizeof(struct compat_flock64)))
584 #undef copy_flock_fields
587 convert_fcntl_cmd(unsigned int cmd)
602 * GETLK was successful and we need to return the data, but it needs to fit in
603 * the compat structure.
604 * l_start shouldn't be too big, unless the original start + end is greater than
605 * COMPAT_OFF_T_MAX, in which case the app was asking for trouble, so we return
606 * -EOVERFLOW in that case. l_len could be too big, in which case we just
607 * truncate it, and only allow the app to see that part of the conflicting lock
608 * that might make sense to it anyway
610 static int fixup_compat_flock(struct flock *flock)
612 if (flock->l_start > COMPAT_OFF_T_MAX)
614 if (flock->l_len > COMPAT_OFF_T_MAX)
615 flock->l_len = COMPAT_OFF_T_MAX;
619 static long do_compat_fcntl64(unsigned int fd, unsigned int cmd,
622 struct fd f = fdget_raw(fd);
629 if (unlikely(f.file->f_mode & FMODE_PATH)) {
630 if (!check_fcntl_cmd(cmd))
634 err = security_file_fcntl(f.file, cmd, arg);
640 err = get_compat_flock(&flock, compat_ptr(arg));
643 err = fcntl_getlk(f.file, convert_fcntl_cmd(cmd), &flock);
646 err = fixup_compat_flock(&flock);
648 err = put_compat_flock(&flock, compat_ptr(arg));
652 err = get_compat_flock64(&flock, compat_ptr(arg));
655 err = fcntl_getlk(f.file, convert_fcntl_cmd(cmd), &flock);
657 err = put_compat_flock64(&flock, compat_ptr(arg));
661 err = get_compat_flock(&flock, compat_ptr(arg));
664 err = fcntl_setlk(fd, f.file, convert_fcntl_cmd(cmd), &flock);
670 err = get_compat_flock64(&flock, compat_ptr(arg));
673 err = fcntl_setlk(fd, f.file, convert_fcntl_cmd(cmd), &flock);
676 err = do_fcntl(fd, cmd, arg, f.file);
684 COMPAT_SYSCALL_DEFINE3(fcntl64, unsigned int, fd, unsigned int, cmd,
687 return do_compat_fcntl64(fd, cmd, arg);
690 COMPAT_SYSCALL_DEFINE3(fcntl, unsigned int, fd, unsigned int, cmd,
702 return do_compat_fcntl64(fd, cmd, arg);
706 /* Table to convert sigio signal codes into poll band bitmaps */
708 static const __poll_t band_table[NSIGPOLL] = {
709 EPOLLIN | EPOLLRDNORM, /* POLL_IN */
710 EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND, /* POLL_OUT */
711 EPOLLIN | EPOLLRDNORM | EPOLLMSG, /* POLL_MSG */
712 EPOLLERR, /* POLL_ERR */
713 EPOLLPRI | EPOLLRDBAND, /* POLL_PRI */
714 EPOLLHUP | EPOLLERR /* POLL_HUP */
717 static inline int sigio_perm(struct task_struct *p,
718 struct fown_struct *fown, int sig)
720 const struct cred *cred;
724 cred = __task_cred(p);
725 ret = ((uid_eq(fown->euid, GLOBAL_ROOT_UID) ||
726 uid_eq(fown->euid, cred->suid) || uid_eq(fown->euid, cred->uid) ||
727 uid_eq(fown->uid, cred->suid) || uid_eq(fown->uid, cred->uid)) &&
728 !security_file_send_sigiotask(p, fown, sig));
733 static void send_sigio_to_task(struct task_struct *p,
734 struct fown_struct *fown,
735 int fd, int reason, enum pid_type type)
738 * F_SETSIG can change ->signum lockless in parallel, make
739 * sure we read it once and use the same value throughout.
741 int signum = READ_ONCE(fown->signum);
743 if (!sigio_perm(p, fown, signum))
750 /* Queue a rt signal with the appropriate fd as its
751 value. We use SI_SIGIO as the source, not
752 SI_KERNEL, since kernel signals always get
753 delivered even if we can't queue. Failure to
754 queue in this case _should_ be reported; we fall
755 back to SIGIO in that case. --sct */
757 si.si_signo = signum;
761 * Posix definies POLL_IN and friends to be signal
762 * specific si_codes for SIG_POLL. Linux extended
763 * these si_codes to other signals in a way that is
764 * ambiguous if other signals also have signal
765 * specific si_codes. In that case use SI_SIGIO instead
766 * to remove the ambiguity.
768 if ((signum != SIGPOLL) && sig_specific_sicodes(signum))
769 si.si_code = SI_SIGIO;
771 /* Make sure we are called with one of the POLL_*
772 reasons, otherwise we could leak kernel stack into
774 BUG_ON((reason < POLL_IN) || ((reason - POLL_IN) >= NSIGPOLL));
775 if (reason - POLL_IN >= NSIGPOLL)
778 si.si_band = mangle_poll(band_table[reason - POLL_IN]);
780 if (!do_send_sig_info(signum, &si, p, type))
783 fallthrough; /* fall back on the old plain SIGIO signal */
785 do_send_sig_info(SIGIO, SEND_SIG_PRIV, p, type);
789 void send_sigio(struct fown_struct *fown, int fd, int band)
791 struct task_struct *p;
796 read_lock_irqsave(&fown->lock, flags);
798 type = fown->pid_type;
801 goto out_unlock_fown;
803 if (type <= PIDTYPE_TGID) {
805 p = pid_task(pid, PIDTYPE_PID);
807 send_sigio_to_task(p, fown, fd, band, type);
810 read_lock(&tasklist_lock);
811 do_each_pid_task(pid, type, p) {
812 send_sigio_to_task(p, fown, fd, band, type);
813 } while_each_pid_task(pid, type, p);
814 read_unlock(&tasklist_lock);
817 read_unlock_irqrestore(&fown->lock, flags);
820 static void send_sigurg_to_task(struct task_struct *p,
821 struct fown_struct *fown, enum pid_type type)
823 if (sigio_perm(p, fown, SIGURG))
824 do_send_sig_info(SIGURG, SEND_SIG_PRIV, p, type);
827 int send_sigurg(struct fown_struct *fown)
829 struct task_struct *p;
835 read_lock_irqsave(&fown->lock, flags);
837 type = fown->pid_type;
840 goto out_unlock_fown;
844 if (type <= PIDTYPE_TGID) {
846 p = pid_task(pid, PIDTYPE_PID);
848 send_sigurg_to_task(p, fown, type);
851 read_lock(&tasklist_lock);
852 do_each_pid_task(pid, type, p) {
853 send_sigurg_to_task(p, fown, type);
854 } while_each_pid_task(pid, type, p);
855 read_unlock(&tasklist_lock);
858 read_unlock_irqrestore(&fown->lock, flags);
862 static DEFINE_SPINLOCK(fasync_lock);
863 static struct kmem_cache *fasync_cache __ro_after_init;
866 * Remove a fasync entry. If successfully removed, return
867 * positive and clear the FASYNC flag. If no entry exists,
868 * do nothing and return 0.
870 * NOTE! It is very important that the FASYNC flag always
871 * match the state "is the filp on a fasync list".
874 int fasync_remove_entry(struct file *filp, struct fasync_struct **fapp)
876 struct fasync_struct *fa, **fp;
879 spin_lock(&filp->f_lock);
880 spin_lock(&fasync_lock);
881 for (fp = fapp; (fa = *fp) != NULL; fp = &fa->fa_next) {
882 if (fa->fa_file != filp)
885 write_lock_irq(&fa->fa_lock);
887 write_unlock_irq(&fa->fa_lock);
890 kfree_rcu(fa, fa_rcu);
891 filp->f_flags &= ~FASYNC;
895 spin_unlock(&fasync_lock);
896 spin_unlock(&filp->f_lock);
900 struct fasync_struct *fasync_alloc(void)
902 return kmem_cache_alloc(fasync_cache, GFP_KERNEL);
906 * NOTE! This can be used only for unused fasync entries:
907 * entries that actually got inserted on the fasync list
908 * need to be released by rcu - see fasync_remove_entry.
910 void fasync_free(struct fasync_struct *new)
912 kmem_cache_free(fasync_cache, new);
916 * Insert a new entry into the fasync list. Return the pointer to the
917 * old one if we didn't use the new one.
919 * NOTE! It is very important that the FASYNC flag always
920 * match the state "is the filp on a fasync list".
922 struct fasync_struct *fasync_insert_entry(int fd, struct file *filp, struct fasync_struct **fapp, struct fasync_struct *new)
924 struct fasync_struct *fa, **fp;
926 spin_lock(&filp->f_lock);
927 spin_lock(&fasync_lock);
928 for (fp = fapp; (fa = *fp) != NULL; fp = &fa->fa_next) {
929 if (fa->fa_file != filp)
932 write_lock_irq(&fa->fa_lock);
934 write_unlock_irq(&fa->fa_lock);
938 rwlock_init(&new->fa_lock);
939 new->magic = FASYNC_MAGIC;
942 new->fa_next = *fapp;
943 rcu_assign_pointer(*fapp, new);
944 filp->f_flags |= FASYNC;
947 spin_unlock(&fasync_lock);
948 spin_unlock(&filp->f_lock);
953 * Add a fasync entry. Return negative on error, positive if
954 * added, and zero if did nothing but change an existing one.
956 static int fasync_add_entry(int fd, struct file *filp, struct fasync_struct **fapp)
958 struct fasync_struct *new;
960 new = fasync_alloc();
965 * fasync_insert_entry() returns the old (update) entry if
968 * So free the (unused) new entry and return 0 to let the
969 * caller know that we didn't add any new fasync entries.
971 if (fasync_insert_entry(fd, filp, fapp, new)) {
980 * fasync_helper() is used by almost all character device drivers
981 * to set up the fasync queue, and for regular files by the file
982 * lease code. It returns negative on error, 0 if it did no changes
983 * and positive if it added/deleted the entry.
985 int fasync_helper(int fd, struct file * filp, int on, struct fasync_struct **fapp)
988 return fasync_remove_entry(filp, fapp);
989 return fasync_add_entry(fd, filp, fapp);
992 EXPORT_SYMBOL(fasync_helper);
995 * rcu_read_lock() is held
997 static void kill_fasync_rcu(struct fasync_struct *fa, int sig, int band)
1000 struct fown_struct *fown;
1001 unsigned long flags;
1003 if (fa->magic != FASYNC_MAGIC) {
1004 printk(KERN_ERR "kill_fasync: bad magic number in "
1005 "fasync_struct!\n");
1008 read_lock_irqsave(&fa->fa_lock, flags);
1010 fown = &fa->fa_file->f_owner;
1011 /* Don't send SIGURG to processes which have not set a
1012 queued signum: SIGURG has its own default signalling
1014 if (!(sig == SIGURG && fown->signum == 0))
1015 send_sigio(fown, fa->fa_fd, band);
1017 read_unlock_irqrestore(&fa->fa_lock, flags);
1018 fa = rcu_dereference(fa->fa_next);
1022 void kill_fasync(struct fasync_struct **fp, int sig, int band)
1024 /* First a quick test without locking: usually
1025 * the list is empty.
1029 kill_fasync_rcu(rcu_dereference(*fp), sig, band);
1033 EXPORT_SYMBOL(kill_fasync);
1035 static int __init fcntl_init(void)
1038 * Please add new bits here to ensure allocation uniqueness.
1039 * Exceptions: O_NONBLOCK is a two bit define on parisc; O_NDELAY
1040 * is defined as O_NONBLOCK on some platforms and not on others.
1042 BUILD_BUG_ON(21 - 1 /* for O_RDONLY being 0 */ !=
1044 (VALID_OPEN_FLAGS & ~(O_NONBLOCK | O_NDELAY)) |
1045 __FMODE_EXEC | __FMODE_NONOTIFY));
1047 fasync_cache = kmem_cache_create("fasync_cache",
1048 sizeof(struct fasync_struct), 0,
1049 SLAB_PANIC | SLAB_ACCOUNT, NULL);
1053 module_init(fcntl_init)