2 * Linux Security Module interfaces
4 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
5 * Copyright (C) 2001 Greg Kroah-Hartman <greg@kroah.com>
6 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
7 * Copyright (C) 2001 James Morris <jmorris@intercode.com.au>
8 * Copyright (C) 2001 Silicon Graphics, Inc. (Trust Technology Group)
9 * Copyright (C) 2015 Intel Corporation.
10 * Copyright (C) 2015 Casey Schaufler <casey@schaufler-ca.com>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * Due to this file being licensed under the GPL there is controversy over
18 * whether this permits you to write a module that #includes this file
19 * without placing your module under the GPL. Please consult a lawyer for
20 * advice before doing this.
24 #ifndef __LINUX_LSM_HOOKS_H
25 #define __LINUX_LSM_HOOKS_H
27 #include <linux/security.h>
28 #include <linux/init.h>
29 #include <linux/rculist.h>
32 * union security_list_options - Linux Security Module hook function list
34 * Security hooks for program execution operations.
37 * Save security information in the bprm->security field, typically based
38 * on information about the bprm->file, for later use by the apply_creds
39 * hook. This hook may also optionally check permissions (e.g. for
40 * transitions between security domains).
41 * This hook may be called multiple times during a single execve, e.g. for
42 * interpreters. The hook can tell whether it has already been called by
43 * checking to see if @bprm->security is non-NULL. If so, then the hook
44 * may decide either to retain the security information saved earlier or
46 * @bprm contains the linux_binprm structure.
47 * Return 0 if the hook is successful and permission is granted.
48 * @bprm_check_security:
49 * This hook mediates the point when a search for a binary handler will
50 * begin. It allows a check the @bprm->security value which is set in the
51 * preceding set_creds call. The primary difference from set_creds is
52 * that the argv list and envp list are reliably available in @bprm. This
53 * hook may be called multiple times during a single execve; and in each
54 * pass set_creds is called first.
55 * @bprm contains the linux_binprm structure.
56 * Return 0 if the hook is successful and permission is granted.
57 * @bprm_committing_creds:
58 * Prepare to install the new security attributes of a process being
59 * transformed by an execve operation, based on the old credentials
60 * pointed to by @current->cred and the information set in @bprm->cred by
61 * the bprm_set_creds hook. @bprm points to the linux_binprm structure.
62 * This hook is a good place to perform state changes on the process such
63 * as closing open file descriptors to which access will no longer be
64 * granted when the attributes are changed. This is called immediately
65 * before commit_creds().
66 * @bprm_committed_creds:
67 * Tidy up after the installation of the new security attributes of a
68 * process being transformed by an execve operation. The new credentials
69 * have, by this point, been set to @current->cred. @bprm points to the
70 * linux_binprm structure. This hook is a good place to perform state
71 * changes on the process such as clearing out non-inheritable signal
72 * state. This is called immediately after commit_creds().
74 * Return a boolean value (0 or 1) indicating whether a "secure exec"
75 * is required. The flag is passed in the auxiliary table
76 * on the initial stack to the ELF interpreter to indicate whether libc
77 * should enable secure mode.
78 * @bprm contains the linux_binprm structure.
80 * Security hooks for filesystem operations.
83 * Allocate and attach a security structure to the sb->s_security field.
84 * The s_security field is initialized to NULL when the structure is
86 * @sb contains the super_block structure to be modified.
87 * Return 0 if operation was successful.
89 * Deallocate and clear the sb->s_security field.
90 * @sb contains the super_block structure to be modified.
92 * Check permission before obtaining filesystem statistics for the @mnt
94 * @dentry is a handle on the superblock for the filesystem.
95 * Return 0 if permission is granted.
97 * Check permission before an object specified by @dev_name is mounted on
98 * the mount point named by @nd. For an ordinary mount, @dev_name
99 * identifies a device if the file system type requires a device. For a
100 * remount (@flags & MS_REMOUNT), @dev_name is irrelevant. For a
101 * loopback/bind mount (@flags & MS_BIND), @dev_name identifies the
102 * pathname of the object being mounted.
103 * @dev_name contains the name for object being mounted.
104 * @path contains the path for mount point object.
105 * @type contains the filesystem type.
106 * @flags contains the mount flags.
107 * @data contains the filesystem-specific data.
108 * Return 0 if permission is granted.
110 * Allow mount option data to be copied prior to parsing by the filesystem,
111 * so that the security module can extract security-specific mount
112 * options cleanly (a filesystem may modify the data e.g. with strsep()).
113 * This also allows the original mount data to be stripped of security-
114 * specific options to avoid having to make filesystems aware of them.
115 * @type the type of filesystem being mounted.
116 * @orig the original mount data copied from userspace.
117 * @copy copied data which will be passed to the security module.
118 * Returns 0 if the copy was successful.
120 * Extracts security system specific mount options and verifies no changes
121 * are being made to those options.
122 * @sb superblock being remounted
123 * @data contains the filesystem-specific data.
124 * Return 0 if permission is granted.
126 * Check permission before the @mnt file system is unmounted.
127 * @mnt contains the mounted file system.
128 * @flags contains the unmount flags, e.g. MNT_FORCE.
129 * Return 0 if permission is granted.
131 * Check permission before pivoting the root filesystem.
132 * @old_path contains the path for the new location of the
133 * current root (put_old).
134 * @new_path contains the path for the new root (new_root).
135 * Return 0 if permission is granted.
137 * Set the security relevant mount options used for a superblock
138 * @sb the superblock to set security mount options for
139 * @opts binary data structure containing all lsm mount data
140 * @sb_clone_mnt_opts:
141 * Copy all security options from a given superblock to another
142 * @oldsb old superblock which contain information to clone
143 * @newsb new superblock which needs filled in
144 * @sb_parse_opts_str:
145 * Parse a string of security data filling in the opts structure
146 * @options string containing all mount options known by the LSM
147 * @opts binary data structure usable by the LSM
148 * @dentry_init_security:
149 * Compute a context for a dentry as the inode is not yet available
150 * since NFSv4 has no label backed by an EA anyway.
151 * @dentry dentry to use in calculating the context.
152 * @mode mode used to determine resource type.
153 * @name name of the last path component used to create file
154 * @ctx pointer to place the pointer to the resulting context in.
155 * @ctxlen point to place the length of the resulting context.
156 * @dentry_create_files_as:
157 * Compute a context for a dentry as the inode is not yet available
158 * and set that context in passed in creds so that new files are
159 * created using that context. Context is calculated using the
160 * passed in creds and not the creds of the caller.
161 * @dentry dentry to use in calculating the context.
162 * @mode mode used to determine resource type.
163 * @name name of the last path component used to create file
164 * @old creds which should be used for context calculation
165 * @new creds to modify
168 * Security hooks for inode operations.
170 * @inode_alloc_security:
171 * Allocate and attach a security structure to @inode->i_security. The
172 * i_security field is initialized to NULL when the inode structure is
174 * @inode contains the inode structure.
175 * Return 0 if operation was successful.
176 * @inode_free_security:
177 * @inode contains the inode structure.
178 * Deallocate the inode security structure and set @inode->i_security to
180 * @inode_init_security:
181 * Obtain the security attribute name suffix and value to set on a newly
182 * created inode and set up the incore security field for the new inode.
183 * This hook is called by the fs code as part of the inode creation
184 * transaction and provides for atomic labeling of the inode, unlike
185 * the post_create/mkdir/... hooks called by the VFS. The hook function
186 * is expected to allocate the name and value via kmalloc, with the caller
187 * being responsible for calling kfree after using them.
188 * If the security module does not use security attributes or does
189 * not wish to put a security attribute on this particular inode,
190 * then it should return -EOPNOTSUPP to skip this processing.
191 * @inode contains the inode structure of the newly created inode.
192 * @dir contains the inode structure of the parent directory.
193 * @qstr contains the last path component of the new object
194 * @name will be set to the allocated name suffix (e.g. selinux).
195 * @value will be set to the allocated attribute value.
196 * @len will be set to the length of the value.
197 * Returns 0 if @name and @value have been successfully set,
198 * -EOPNOTSUPP if no security attribute is needed, or
199 * -ENOMEM on memory allocation failure.
201 * Check permission to create a regular file.
202 * @dir contains inode structure of the parent of the new file.
203 * @dentry contains the dentry structure for the file to be created.
204 * @mode contains the file mode of the file to be created.
205 * Return 0 if permission is granted.
207 * Check permission before creating a new hard link to a file.
208 * @old_dentry contains the dentry structure for an existing
210 * @dir contains the inode structure of the parent directory
212 * @new_dentry contains the dentry structure for the new link.
213 * Return 0 if permission is granted.
215 * Check permission before creating a new hard link to a file.
216 * @old_dentry contains the dentry structure for an existing link
218 * @new_dir contains the path structure of the parent directory of
220 * @new_dentry contains the dentry structure for the new link.
221 * Return 0 if permission is granted.
223 * Check the permission to remove a hard link to a file.
224 * @dir contains the inode structure of parent directory of the file.
225 * @dentry contains the dentry structure for file to be unlinked.
226 * Return 0 if permission is granted.
228 * Check the permission to remove a hard link to a file.
229 * @dir contains the path structure of parent directory of the file.
230 * @dentry contains the dentry structure for file to be unlinked.
231 * Return 0 if permission is granted.
233 * Check the permission to create a symbolic link to a file.
234 * @dir contains the inode structure of parent directory of
236 * @dentry contains the dentry structure of the symbolic link.
237 * @old_name contains the pathname of file.
238 * Return 0 if permission is granted.
240 * Check the permission to create a symbolic link to a file.
241 * @dir contains the path structure of parent directory of
243 * @dentry contains the dentry structure of the symbolic link.
244 * @old_name contains the pathname of file.
245 * Return 0 if permission is granted.
247 * Check permissions to create a new directory in the existing directory
248 * associated with inode structure @dir.
249 * @dir contains the inode structure of parent of the directory
251 * @dentry contains the dentry structure of new directory.
252 * @mode contains the mode of new directory.
253 * Return 0 if permission is granted.
255 * Check permissions to create a new directory in the existing directory
256 * associated with path structure @path.
257 * @dir contains the path structure of parent of the directory
259 * @dentry contains the dentry structure of new directory.
260 * @mode contains the mode of new directory.
261 * Return 0 if permission is granted.
263 * Check the permission to remove a directory.
264 * @dir contains the inode structure of parent of the directory
266 * @dentry contains the dentry structure of directory to be removed.
267 * Return 0 if permission is granted.
269 * Check the permission to remove a directory.
270 * @dir contains the path structure of parent of the directory to be
272 * @dentry contains the dentry structure of directory to be removed.
273 * Return 0 if permission is granted.
275 * Check permissions when creating a special file (or a socket or a fifo
276 * file created via the mknod system call). Note that if mknod operation
277 * is being done for a regular file, then the create hook will be called
279 * @dir contains the inode structure of parent of the new file.
280 * @dentry contains the dentry structure of the new file.
281 * @mode contains the mode of the new file.
282 * @dev contains the device number.
283 * Return 0 if permission is granted.
285 * Check permissions when creating a file. Note that this hook is called
286 * even if mknod operation is being done for a regular file.
287 * @dir contains the path structure of parent of the new file.
288 * @dentry contains the dentry structure of the new file.
289 * @mode contains the mode of the new file.
290 * @dev contains the undecoded device number. Use new_decode_dev() to get
291 * the decoded device number.
292 * Return 0 if permission is granted.
294 * Check for permission to rename a file or directory.
295 * @old_dir contains the inode structure for parent of the old link.
296 * @old_dentry contains the dentry structure of the old link.
297 * @new_dir contains the inode structure for parent of the new link.
298 * @new_dentry contains the dentry structure of the new link.
299 * Return 0 if permission is granted.
301 * Check for permission to rename a file or directory.
302 * @old_dir contains the path structure for parent of the old link.
303 * @old_dentry contains the dentry structure of the old link.
304 * @new_dir contains the path structure for parent of the new link.
305 * @new_dentry contains the dentry structure of the new link.
306 * Return 0 if permission is granted.
308 * Check for permission to change DAC's permission of a file or directory.
309 * @dentry contains the dentry structure.
310 * @mnt contains the vfsmnt structure.
311 * @mode contains DAC's mode.
312 * Return 0 if permission is granted.
314 * Check for permission to change owner/group of a file or directory.
315 * @path contains the path structure.
316 * @uid contains new owner's ID.
317 * @gid contains new group's ID.
318 * Return 0 if permission is granted.
320 * Check for permission to change root directory.
321 * @path contains the path structure.
322 * Return 0 if permission is granted.
324 * Check the permission to read the symbolic link.
325 * @dentry contains the dentry structure for the file link.
326 * Return 0 if permission is granted.
327 * @inode_follow_link:
328 * Check permission to follow a symbolic link when looking up a pathname.
329 * @dentry contains the dentry structure for the link.
330 * @inode contains the inode, which itself is not stable in RCU-walk
331 * @rcu indicates whether we are in RCU-walk mode.
332 * Return 0 if permission is granted.
334 * Check permission before accessing an inode. This hook is called by the
335 * existing Linux permission function, so a security module can use it to
336 * provide additional checking for existing Linux permission checks.
337 * Notice that this hook is called when a file is opened (as well as many
338 * other operations), whereas the file_security_ops permission hook is
339 * called when the actual read/write operations are performed.
340 * @inode contains the inode structure to check.
341 * @mask contains the permission mask.
342 * Return 0 if permission is granted.
344 * Check permission before setting file attributes. Note that the kernel
345 * call to notify_change is performed from several locations, whenever
346 * file attributes change (such as when a file is truncated, chown/chmod
347 * operations, transferring disk quotas, etc).
348 * @dentry contains the dentry structure for the file.
349 * @attr is the iattr structure containing the new file attributes.
350 * Return 0 if permission is granted.
352 * Check permission before truncating a file.
353 * @path contains the path structure for the file.
354 * Return 0 if permission is granted.
356 * Check permission before obtaining file attributes.
357 * @path contains the path structure for the file.
358 * Return 0 if permission is granted.
360 * Check permission before setting the extended attributes
361 * @value identified by @name for @dentry.
362 * Return 0 if permission is granted.
363 * @inode_post_setxattr:
364 * Update inode security field after successful setxattr operation.
365 * @value identified by @name for @dentry.
367 * Check permission before obtaining the extended attributes
368 * identified by @name for @dentry.
369 * Return 0 if permission is granted.
371 * Check permission before obtaining the list of extended attribute
373 * Return 0 if permission is granted.
374 * @inode_removexattr:
375 * Check permission before removing the extended attribute
376 * identified by @name for @dentry.
377 * Return 0 if permission is granted.
378 * @inode_getsecurity:
379 * Retrieve a copy of the extended attribute representation of the
380 * security label associated with @name for @inode via @buffer. Note that
381 * @name is the remainder of the attribute name after the security prefix
382 * has been removed. @alloc is used to specify of the call should return a
383 * value via the buffer or just the value length Return size of buffer on
385 * @inode_setsecurity:
386 * Set the security label associated with @name for @inode from the
387 * extended attribute value @value. @size indicates the size of the
388 * @value in bytes. @flags may be XATTR_CREATE, XATTR_REPLACE, or 0.
389 * Note that @name is the remainder of the attribute name after the
390 * security. prefix has been removed.
391 * Return 0 on success.
392 * @inode_listsecurity:
393 * Copy the extended attribute names for the security labels
394 * associated with @inode into @buffer. The maximum size of @buffer
395 * is specified by @buffer_size. @buffer may be NULL to request
396 * the size of the buffer required.
397 * Returns number of bytes used/required on success.
398 * @inode_need_killpriv:
399 * Called when an inode has been changed.
400 * @dentry is the dentry being changed.
401 * Return <0 on error to abort the inode change operation.
402 * Return 0 if inode_killpriv does not need to be called.
403 * Return >0 if inode_killpriv does need to be called.
405 * The setuid bit is being removed. Remove similar security labels.
406 * Called with the dentry->d_inode->i_mutex held.
407 * @dentry is the dentry being changed.
408 * Return 0 on success. If error is returned, then the operation
409 * causing setuid bit removal is failed.
411 * Get the secid associated with the node.
412 * @inode contains a pointer to the inode.
413 * @secid contains a pointer to the location where result will be saved.
414 * In case of failure, @secid will be set to zero.
416 * A file is about to be copied up from lower layer to upper layer of
417 * overlay filesystem. Security module can prepare a set of new creds
418 * and modify as need be and return new creds. Caller will switch to
419 * new creds temporarily to create new file and release newly allocated
421 * @src indicates the union dentry of file that is being copied up.
422 * @new pointer to pointer to return newly allocated creds.
423 * Returns 0 on success or a negative error code on error.
424 * @inode_copy_up_xattr:
425 * Filter the xattrs being copied up when a unioned file is copied
426 * up from a lower layer to the union/overlay layer.
427 * @name indicates the name of the xattr.
428 * Returns 0 to accept the xattr, 1 to discard the xattr, -EOPNOTSUPP if
429 * security module does not know about attribute or a negative error code
430 * to abort the copy up. Note that the caller is responsible for reading
431 * and writing the xattrs as this hook is merely a filter.
433 * Security hooks for file operations
436 * Check file permissions before accessing an open file. This hook is
437 * called by various operations that read or write files. A security
438 * module can use this hook to perform additional checking on these
439 * operations, e.g. to revalidate permissions on use to support privilege
440 * bracketing or policy changes. Notice that this hook is used when the
441 * actual read/write operations are performed, whereas the
442 * inode_security_ops hook is called when a file is opened (as well as
443 * many other operations).
444 * Caveat: Although this hook can be used to revalidate permissions for
445 * various system call operations that read or write files, it does not
446 * address the revalidation of permissions for memory-mapped files.
447 * Security modules must handle this separately if they need such
449 * @file contains the file structure being accessed.
450 * @mask contains the requested permissions.
451 * Return 0 if permission is granted.
452 * @file_alloc_security:
453 * Allocate and attach a security structure to the file->f_security field.
454 * The security field is initialized to NULL when the structure is first
456 * @file contains the file structure to secure.
457 * Return 0 if the hook is successful and permission is granted.
458 * @file_free_security:
459 * Deallocate and free any security structures stored in file->f_security.
460 * @file contains the file structure being modified.
462 * @file contains the file structure.
463 * @cmd contains the operation to perform.
464 * @arg contains the operational arguments.
465 * Check permission for an ioctl operation on @file. Note that @arg
466 * sometimes represents a user space pointer; in other cases, it may be a
467 * simple integer value. When @arg represents a user space pointer, it
468 * should never be used by the security module.
469 * Return 0 if permission is granted.
471 * Check permissions for a mmap operation at @addr.
472 * @addr contains virtual address that will be used for the operation.
473 * Return 0 if permission is granted.
475 * Check permissions for a mmap operation. The @file may be NULL, e.g.
476 * if mapping anonymous memory.
477 * @file contains the file structure for file to map (may be NULL).
478 * @reqprot contains the protection requested by the application.
479 * @prot contains the protection that will be applied by the kernel.
480 * @flags contains the operational flags.
481 * Return 0 if permission is granted.
483 * Check permissions before changing memory access permissions.
484 * @vma contains the memory region to modify.
485 * @reqprot contains the protection requested by the application.
486 * @prot contains the protection that will be applied by the kernel.
487 * Return 0 if permission is granted.
489 * Check permission before performing file locking operations.
490 * Note: this hook mediates both flock and fcntl style locks.
491 * @file contains the file structure.
492 * @cmd contains the posix-translated lock operation to perform
493 * (e.g. F_RDLCK, F_WRLCK).
494 * Return 0 if permission is granted.
496 * Check permission before allowing the file operation specified by @cmd
497 * from being performed on the file @file. Note that @arg sometimes
498 * represents a user space pointer; in other cases, it may be a simple
499 * integer value. When @arg represents a user space pointer, it should
500 * never be used by the security module.
501 * @file contains the file structure.
502 * @cmd contains the operation to be performed.
503 * @arg contains the operational arguments.
504 * Return 0 if permission is granted.
506 * Save owner security information (typically from current->security) in
507 * file->f_security for later use by the send_sigiotask hook.
508 * @file contains the file structure to update.
509 * Return 0 on success.
510 * @file_send_sigiotask:
511 * Check permission for the file owner @fown to send SIGIO or SIGURG to the
512 * process @tsk. Note that this hook is sometimes called from interrupt.
513 * Note that the fown_struct, @fown, is never outside the context of a
514 * struct file, so the file structure (and associated security information)
515 * can always be obtained: container_of(fown, struct file, f_owner)
516 * @tsk contains the structure of task receiving signal.
517 * @fown contains the file owner information.
518 * @sig is the signal that will be sent. When 0, kernel sends SIGIO.
519 * Return 0 if permission is granted.
521 * This hook allows security modules to control the ability of a process
522 * to receive an open file descriptor via socket IPC.
523 * @file contains the file structure being received.
524 * Return 0 if permission is granted.
526 * Save open-time permission checking state for later use upon
527 * file_permission, and recheck access if anything has changed
528 * since inode_permission.
530 * Security hooks for task operations.
533 * Check permission before creating a child process. See the clone(2)
534 * manual page for definitions of the @clone_flags.
535 * @clone_flags contains the flags indicating what should be shared.
536 * Return 0 if permission is granted.
538 * @task task being allocated.
539 * @clone_flags contains the flags indicating what should be shared.
540 * Handle allocation of task-related resources.
541 * Returns a zero on success, negative values on failure.
543 * @task task about to be freed.
544 * Handle release of task-related resources. (Note that this can be called
545 * from interrupt context.)
547 * @cred points to the credentials.
548 * @gfp indicates the atomicity of any memory allocations.
549 * Only allocate sufficient memory and attach to @cred such that
550 * cred_transfer() will not get ENOMEM.
552 * @cred points to the credentials.
553 * Deallocate and clear the cred->security field in a set of credentials.
555 * @new points to the new credentials.
556 * @old points to the original credentials.
557 * @gfp indicates the atomicity of any memory allocations.
558 * Prepare a new set of credentials by copying the data from the old set.
560 * @new points to the new credentials.
561 * @old points to the original credentials.
562 * Transfer data from original creds to new creds
564 * Set the credentials for a kernel service to act as (subjective context).
565 * @new points to the credentials to be modified.
566 * @secid specifies the security ID to be set
567 * The current task must be the one that nominated @secid.
568 * Return 0 if successful.
569 * @kernel_create_files_as:
570 * Set the file creation context in a set of credentials to be the same as
571 * the objective context of the specified inode.
572 * @new points to the credentials to be modified.
573 * @inode points to the inode to use as a reference.
574 * The current task must be the one that nominated @inode.
575 * Return 0 if successful.
576 * @kernel_module_request:
577 * Ability to trigger the kernel to automatically upcall to userspace for
578 * userspace to load a kernel module with the given name.
579 * @kmod_name name of the module requested by the kernel
580 * Return 0 if successful.
582 * Read a file specified by userspace.
583 * @file contains the file structure pointing to the file being read
585 * @id kernel read file identifier
586 * Return 0 if permission is granted.
587 * @kernel_post_read_file:
588 * Read a file specified by userspace.
589 * @file contains the file structure pointing to the file being read
591 * @buf pointer to buffer containing the file contents.
592 * @size length of the file contents.
593 * @id kernel read file identifier
594 * Return 0 if permission is granted.
596 * Update the module's state after setting one or more of the user
597 * identity attributes of the current process. The @flags parameter
598 * indicates which of the set*uid system calls invoked this hook. If
599 * @new is the set of credentials that will be installed. Modifications
600 * should be made to this rather than to @current->cred.
601 * @old is the set of credentials that are being replaces
602 * @flags contains one of the LSM_SETID_* values.
603 * Return 0 on success.
605 * Check permission before setting the process group identifier of the
606 * process @p to @pgid.
607 * @p contains the task_struct for process being modified.
608 * @pgid contains the new pgid.
609 * Return 0 if permission is granted.
611 * Check permission before getting the process group identifier of the
613 * @p contains the task_struct for the process.
614 * Return 0 if permission is granted.
616 * Check permission before getting the session identifier of the process
618 * @p contains the task_struct for the process.
619 * Return 0 if permission is granted.
621 * Retrieve the security identifier of the process @p.
622 * @p contains the task_struct for the process and place is into @secid.
623 * In case of failure, @secid will be set to zero.
626 * Check permission before setting the nice value of @p to @nice.
627 * @p contains the task_struct of process.
628 * @nice contains the new nice value.
629 * Return 0 if permission is granted.
631 * Check permission before setting the ioprio value of @p to @ioprio.
632 * @p contains the task_struct of process.
633 * @ioprio contains the new ioprio value
634 * Return 0 if permission is granted.
636 * Check permission before getting the ioprio value of @p.
637 * @p contains the task_struct of process.
638 * Return 0 if permission is granted.
640 * Check permission before getting and/or setting the resource limits of
642 * @cred points to the cred structure for the current task.
643 * @tcred points to the cred structure for the target task.
644 * @flags contains the LSM_PRLIMIT_* flag bits indicating whether the
645 * resource limits are being read, modified, or both.
646 * Return 0 if permission is granted.
648 * Check permission before setting the resource limits of process @p
649 * for @resource to @new_rlim. The old resource limit values can
650 * be examined by dereferencing (p->signal->rlim + resource).
651 * @p points to the task_struct for the target task's group leader.
652 * @resource contains the resource whose limit is being set.
653 * @new_rlim contains the new limits for @resource.
654 * Return 0 if permission is granted.
655 * @task_setscheduler:
656 * Check permission before setting scheduling policy and/or parameters of
657 * process @p based on @policy and @lp.
658 * @p contains the task_struct for process.
659 * @policy contains the scheduling policy.
660 * @lp contains the scheduling parameters.
661 * Return 0 if permission is granted.
662 * @task_getscheduler:
663 * Check permission before obtaining scheduling information for process
665 * @p contains the task_struct for process.
666 * Return 0 if permission is granted.
668 * Check permission before moving memory owned by process @p.
669 * @p contains the task_struct for process.
670 * Return 0 if permission is granted.
672 * Check permission before sending signal @sig to @p. @info can be NULL,
673 * the constant 1, or a pointer to a siginfo structure. If @info is 1 or
674 * SI_FROMKERNEL(info) is true, then the signal should be viewed as coming
675 * from the kernel and should typically be permitted.
676 * SIGIO signals are handled separately by the send_sigiotask hook in
678 * @p contains the task_struct for process.
679 * @info contains the signal information.
680 * @sig contains the signal value.
681 * @secid contains the sid of the process where the signal originated
682 * Return 0 if permission is granted.
684 * Check permission before performing a process control operation on the
686 * @option contains the operation.
687 * @arg2 contains a argument.
688 * @arg3 contains a argument.
689 * @arg4 contains a argument.
690 * @arg5 contains a argument.
691 * Return -ENOSYS if no-one wanted to handle this op, any other value to
692 * cause prctl() to return immediately with that value.
694 * Set the security attributes for an inode based on an associated task's
695 * security attributes, e.g. for /proc/pid inodes.
696 * @p contains the task_struct for the task.
697 * @inode contains the inode structure for the inode.
699 * Security hooks for Netlink messaging.
702 * Save security information for a netlink message so that permission
703 * checking can be performed when the message is processed. The security
704 * information can be saved using the eff_cap field of the
705 * netlink_skb_parms structure. Also may be used to provide fine
706 * grained control over message transmission.
707 * @sk associated sock of task sending the message.
708 * @skb contains the sk_buff structure for the netlink message.
709 * Return 0 if the information was successfully saved and message
710 * is allowed to be transmitted.
712 * Security hooks for Unix domain networking.
714 * @unix_stream_connect:
715 * Check permissions before establishing a Unix domain stream connection
716 * between @sock and @other.
717 * @sock contains the sock structure.
718 * @other contains the peer sock structure.
719 * @newsk contains the new sock structure.
720 * Return 0 if permission is granted.
722 * Check permissions before connecting or sending datagrams from @sock to
724 * @sock contains the socket structure.
725 * @other contains the peer socket structure.
726 * Return 0 if permission is granted.
728 * The @unix_stream_connect and @unix_may_send hooks were necessary because
729 * Linux provides an alternative to the conventional file name space for Unix
730 * domain sockets. Whereas binding and connecting to sockets in the file name
731 * space is mediated by the typical file permissions (and caught by the mknod
732 * and permission hooks in inode_security_ops), binding and connecting to
733 * sockets in the abstract name space is completely unmediated. Sufficient
734 * control of Unix domain sockets in the abstract name space isn't possible
735 * using only the socket layer hooks, since we need to know the actual target
736 * socket, which is not looked up until we are inside the af_unix code.
738 * Security hooks for socket operations.
741 * Check permissions prior to creating a new socket.
742 * @family contains the requested protocol family.
743 * @type contains the requested communications type.
744 * @protocol contains the requested protocol.
745 * @kern set to 1 if a kernel socket.
746 * Return 0 if permission is granted.
747 * @socket_post_create:
748 * This hook allows a module to update or allocate a per-socket security
749 * structure. Note that the security field was not added directly to the
750 * socket structure, but rather, the socket security information is stored
751 * in the associated inode. Typically, the inode alloc_security hook will
752 * allocate and and attach security information to
753 * sock->inode->i_security. This hook may be used to update the
754 * sock->inode->i_security field with additional information that wasn't
755 * available when the inode was allocated.
756 * @sock contains the newly created socket structure.
757 * @family contains the requested protocol family.
758 * @type contains the requested communications type.
759 * @protocol contains the requested protocol.
760 * @kern set to 1 if a kernel socket.
762 * Check permission before socket protocol layer bind operation is
763 * performed and the socket @sock is bound to the address specified in the
764 * @address parameter.
765 * @sock contains the socket structure.
766 * @address contains the address to bind to.
767 * @addrlen contains the length of address.
768 * Return 0 if permission is granted.
770 * Check permission before socket protocol layer connect operation
771 * attempts to connect socket @sock to a remote address, @address.
772 * @sock contains the socket structure.
773 * @address contains the address of remote endpoint.
774 * @addrlen contains the length of address.
775 * Return 0 if permission is granted.
777 * Check permission before socket protocol layer listen operation.
778 * @sock contains the socket structure.
779 * @backlog contains the maximum length for the pending connection queue.
780 * Return 0 if permission is granted.
782 * Check permission before accepting a new connection. Note that the new
783 * socket, @newsock, has been created and some information copied to it,
784 * but the accept operation has not actually been performed.
785 * @sock contains the listening socket structure.
786 * @newsock contains the newly created server socket for connection.
787 * Return 0 if permission is granted.
789 * Check permission before transmitting a message to another socket.
790 * @sock contains the socket structure.
791 * @msg contains the message to be transmitted.
792 * @size contains the size of message.
793 * Return 0 if permission is granted.
795 * Check permission before receiving a message from a socket.
796 * @sock contains the socket structure.
797 * @msg contains the message structure.
798 * @size contains the size of message structure.
799 * @flags contains the operational flags.
800 * Return 0 if permission is granted.
801 * @socket_getsockname:
802 * Check permission before the local address (name) of the socket object
803 * @sock is retrieved.
804 * @sock contains the socket structure.
805 * Return 0 if permission is granted.
806 * @socket_getpeername:
807 * Check permission before the remote address (name) of a socket object
808 * @sock is retrieved.
809 * @sock contains the socket structure.
810 * Return 0 if permission is granted.
811 * @socket_getsockopt:
812 * Check permissions before retrieving the options associated with socket
814 * @sock contains the socket structure.
815 * @level contains the protocol level to retrieve option from.
816 * @optname contains the name of option to retrieve.
817 * Return 0 if permission is granted.
818 * @socket_setsockopt:
819 * Check permissions before setting the options associated with socket
821 * @sock contains the socket structure.
822 * @level contains the protocol level to set options for.
823 * @optname contains the name of the option to set.
824 * Return 0 if permission is granted.
826 * Checks permission before all or part of a connection on the socket
827 * @sock is shut down.
828 * @sock contains the socket structure.
829 * @how contains the flag indicating how future sends and receives
831 * Return 0 if permission is granted.
832 * @socket_sock_rcv_skb:
833 * Check permissions on incoming network packets. This hook is distinct
834 * from Netfilter's IP input hooks since it is the first time that the
835 * incoming sk_buff @skb has been associated with a particular socket, @sk.
836 * Must not sleep inside this hook because some callers hold spinlocks.
837 * @sk contains the sock (not socket) associated with the incoming sk_buff.
838 * @skb contains the incoming network data.
839 * @socket_getpeersec_stream:
840 * This hook allows the security module to provide peer socket security
841 * state for unix or connected tcp sockets to userspace via getsockopt
842 * SO_GETPEERSEC. For tcp sockets this can be meaningful if the
843 * socket is associated with an ipsec SA.
844 * @sock is the local socket.
845 * @optval userspace memory where the security state is to be copied.
846 * @optlen userspace int where the module should copy the actual length
847 * of the security state.
848 * @len as input is the maximum length to copy to userspace provided
850 * Return 0 if all is well, otherwise, typical getsockopt return
852 * @socket_getpeersec_dgram:
853 * This hook allows the security module to provide peer socket security
854 * state for udp sockets on a per-packet basis to userspace via
855 * getsockopt SO_GETPEERSEC. The application must first have indicated
856 * the IP_PASSSEC option via getsockopt. It can then retrieve the
857 * security state returned by this hook for a packet via the SCM_SECURITY
858 * ancillary message type.
859 * @skb is the skbuff for the packet being queried
860 * @secdata is a pointer to a buffer in which to copy the security data
861 * @seclen is the maximum length for @secdata
862 * Return 0 on success, error on failure.
863 * @sk_alloc_security:
864 * Allocate and attach a security structure to the sk->sk_security field,
865 * which is used to copy security attributes between local stream sockets.
867 * Deallocate security structure.
868 * @sk_clone_security:
869 * Clone/copy security structure.
871 * Retrieve the LSM-specific secid for the sock to enable caching
872 * of network authorizations.
874 * Sets the socket's isec sid to the sock's sid.
875 * @inet_conn_request:
876 * Sets the openreq's sid to socket's sid with MLS portion taken
879 * Sets the new child socket's sid to the openreq sid.
880 * @inet_conn_established:
881 * Sets the connection's peersid to the secmark on skb.
882 * @secmark_relabel_packet:
883 * check if the process should be allowed to relabel packets to
885 * @security_secmark_refcount_inc
886 * tells the LSM to increment the number of secmark labeling rules loaded
887 * @security_secmark_refcount_dec
888 * tells the LSM to decrement the number of secmark labeling rules loaded
889 * @req_classify_flow:
890 * Sets the flow's sid to the openreq sid.
891 * @tun_dev_alloc_security:
892 * This hook allows a module to allocate a security structure for a TUN
894 * @security pointer to a security structure pointer.
895 * Returns a zero on success, negative values on failure.
896 * @tun_dev_free_security:
897 * This hook allows a module to free the security structure for a TUN
899 * @security pointer to the TUN device's security structure
901 * Check permissions prior to creating a new TUN device.
902 * @tun_dev_attach_queue:
903 * Check permissions prior to attaching to a TUN device queue.
904 * @security pointer to the TUN device's security structure.
906 * This hook can be used by the module to update any security state
907 * associated with the TUN device's sock structure.
908 * @sk contains the existing sock structure.
909 * @security pointer to the TUN device's security structure.
911 * This hook can be used by the module to update any security state
912 * associated with the TUN device's security structure.
913 * @security pointer to the TUN devices's security structure.
915 * Security hooks for XFRM operations.
917 * @xfrm_policy_alloc_security:
918 * @ctxp is a pointer to the xfrm_sec_ctx being added to Security Policy
919 * Database used by the XFRM system.
920 * @sec_ctx contains the security context information being provided by
921 * the user-level policy update program (e.g., setkey).
922 * Allocate a security structure to the xp->security field; the security
923 * field is initialized to NULL when the xfrm_policy is allocated.
924 * Return 0 if operation was successful (memory to allocate, legal context)
925 * @gfp is to specify the context for the allocation
926 * @xfrm_policy_clone_security:
927 * @old_ctx contains an existing xfrm_sec_ctx.
928 * @new_ctxp contains a new xfrm_sec_ctx being cloned from old.
929 * Allocate a security structure in new_ctxp that contains the
930 * information from the old_ctx structure.
931 * Return 0 if operation was successful (memory to allocate).
932 * @xfrm_policy_free_security:
933 * @ctx contains the xfrm_sec_ctx
934 * Deallocate xp->security.
935 * @xfrm_policy_delete_security:
936 * @ctx contains the xfrm_sec_ctx.
937 * Authorize deletion of xp->security.
939 * @x contains the xfrm_state being added to the Security Association
940 * Database by the XFRM system.
941 * @sec_ctx contains the security context information being provided by
942 * the user-level SA generation program (e.g., setkey or racoon).
943 * Allocate a security structure to the x->security field; the security
944 * field is initialized to NULL when the xfrm_state is allocated. Set the
945 * context to correspond to sec_ctx. Return 0 if operation was successful
946 * (memory to allocate, legal context).
947 * @xfrm_state_alloc_acquire:
948 * @x contains the xfrm_state being added to the Security Association
949 * Database by the XFRM system.
950 * @polsec contains the policy's security context.
951 * @secid contains the secid from which to take the mls portion of the
953 * Allocate a security structure to the x->security field; the security
954 * field is initialized to NULL when the xfrm_state is allocated. Set the
955 * context to correspond to secid. Return 0 if operation was successful
956 * (memory to allocate, legal context).
957 * @xfrm_state_free_security:
958 * @x contains the xfrm_state.
959 * Deallocate x->security.
960 * @xfrm_state_delete_security:
961 * @x contains the xfrm_state.
962 * Authorize deletion of x->security.
963 * @xfrm_policy_lookup:
964 * @ctx contains the xfrm_sec_ctx for which the access control is being
966 * @fl_secid contains the flow security label that is used to authorize
967 * access to the policy xp.
968 * @dir contains the direction of the flow (input or output).
969 * Check permission when a flow selects a xfrm_policy for processing
970 * XFRMs on a packet. The hook is called when selecting either a
971 * per-socket policy or a generic xfrm policy.
972 * Return 0 if permission is granted, -ESRCH otherwise, or -errno
974 * @xfrm_state_pol_flow_match:
975 * @x contains the state to match.
976 * @xp contains the policy to check for a match.
977 * @fl contains the flow to check for a match.
978 * Return 1 if there is a match.
979 * @xfrm_decode_session:
980 * @skb points to skb to decode.
981 * @secid points to the flow key secid to set.
982 * @ckall says if all xfrms used should be checked for same secid.
983 * Return 0 if ckall is zero or all xfrms used have the same secid.
985 * Security hooks affecting all Key Management operations
988 * Permit allocation of a key and assign security data. Note that key does
989 * not have a serial number assigned at this point.
990 * @key points to the key.
991 * @flags is the allocation flags
992 * Return 0 if permission is granted, -ve error otherwise.
994 * Notification of destruction; free security data.
995 * @key points to the key.
998 * See whether a specific operational right is granted to a process on a
1000 * @key_ref refers to the key (key pointer + possession attribute bit).
1001 * @cred points to the credentials to provide the context against which to
1002 * evaluate the security data on the key.
1003 * @perm describes the combination of permissions required of this key.
1004 * Return 0 if permission is granted, -ve error otherwise.
1006 * Get a textual representation of the security context attached to a key
1007 * for the purposes of honouring KEYCTL_GETSECURITY. This function
1008 * allocates the storage for the NUL-terminated string and the caller
1010 * @key points to the key to be queried.
1011 * @_buffer points to a pointer that should be set to point to the
1012 * resulting string (if no label or an error occurs).
1013 * Return the length of the string (including terminating NUL) or -ve if
1015 * May also return 0 (and a NULL buffer pointer) if there is no label.
1017 * Security hooks affecting all System V IPC operations.
1020 * Check permissions for access to IPC
1021 * @ipcp contains the kernel IPC permission structure
1022 * @flag contains the desired (requested) permission set
1023 * Return 0 if permission is granted.
1025 * Get the secid associated with the ipc object.
1026 * @ipcp contains the kernel IPC permission structure.
1027 * @secid contains a pointer to the location where result will be saved.
1028 * In case of failure, @secid will be set to zero.
1030 * Security hooks for individual messages held in System V IPC message queues
1031 * @msg_msg_alloc_security:
1032 * Allocate and attach a security structure to the msg->security field.
1033 * The security field is initialized to NULL when the structure is first
1035 * @msg contains the message structure to be modified.
1036 * Return 0 if operation was successful and permission is granted.
1037 * @msg_msg_free_security:
1038 * Deallocate the security structure for this message.
1039 * @msg contains the message structure to be modified.
1041 * Security hooks for System V IPC Message Queues
1043 * @msg_queue_alloc_security:
1044 * Allocate and attach a security structure to the
1045 * msq->q_perm.security field. The security field is initialized to
1046 * NULL when the structure is first created.
1047 * @msq contains the message queue structure to be modified.
1048 * Return 0 if operation was successful and permission is granted.
1049 * @msg_queue_free_security:
1050 * Deallocate security structure for this message queue.
1051 * @msq contains the message queue structure to be modified.
1052 * @msg_queue_associate:
1053 * Check permission when a message queue is requested through the
1054 * msgget system call. This hook is only called when returning the
1055 * message queue identifier for an existing message queue, not when a
1056 * new message queue is created.
1057 * @msq contains the message queue to act upon.
1058 * @msqflg contains the operation control flags.
1059 * Return 0 if permission is granted.
1060 * @msg_queue_msgctl:
1061 * Check permission when a message control operation specified by @cmd
1062 * is to be performed on the message queue @msq.
1063 * The @msq may be NULL, e.g. for IPC_INFO or MSG_INFO.
1064 * @msq contains the message queue to act upon. May be NULL.
1065 * @cmd contains the operation to be performed.
1066 * Return 0 if permission is granted.
1067 * @msg_queue_msgsnd:
1068 * Check permission before a message, @msg, is enqueued on the message
1070 * @msq contains the message queue to send message to.
1071 * @msg contains the message to be enqueued.
1072 * @msqflg contains operational flags.
1073 * Return 0 if permission is granted.
1074 * @msg_queue_msgrcv:
1075 * Check permission before a message, @msg, is removed from the message
1076 * queue, @msq. The @target task structure contains a pointer to the
1077 * process that will be receiving the message (not equal to the current
1078 * process when inline receives are being performed).
1079 * @msq contains the message queue to retrieve message from.
1080 * @msg contains the message destination.
1081 * @target contains the task structure for recipient process.
1082 * @type contains the type of message requested.
1083 * @mode contains the operational flags.
1084 * Return 0 if permission is granted.
1086 * Security hooks for System V Shared Memory Segments
1088 * @shm_alloc_security:
1089 * Allocate and attach a security structure to the shp->shm_perm.security
1090 * field. The security field is initialized to NULL when the structure is
1092 * @shp contains the shared memory structure to be modified.
1093 * Return 0 if operation was successful and permission is granted.
1094 * @shm_free_security:
1095 * Deallocate the security struct for this memory segment.
1096 * @shp contains the shared memory structure to be modified.
1098 * Check permission when a shared memory region is requested through the
1099 * shmget system call. This hook is only called when returning the shared
1100 * memory region identifier for an existing region, not when a new shared
1101 * memory region is created.
1102 * @shp contains the shared memory structure to be modified.
1103 * @shmflg contains the operation control flags.
1104 * Return 0 if permission is granted.
1106 * Check permission when a shared memory control operation specified by
1107 * @cmd is to be performed on the shared memory region @shp.
1108 * The @shp may be NULL, e.g. for IPC_INFO or SHM_INFO.
1109 * @shp contains shared memory structure to be modified.
1110 * @cmd contains the operation to be performed.
1111 * Return 0 if permission is granted.
1113 * Check permissions prior to allowing the shmat system call to attach the
1114 * shared memory segment @shp to the data segment of the calling process.
1115 * The attaching address is specified by @shmaddr.
1116 * @shp contains the shared memory structure to be modified.
1117 * @shmaddr contains the address to attach memory region to.
1118 * @shmflg contains the operational flags.
1119 * Return 0 if permission is granted.
1121 * Security hooks for System V Semaphores
1123 * @sem_alloc_security:
1124 * Allocate and attach a security structure to the sma->sem_perm.security
1125 * field. The security field is initialized to NULL when the structure is
1127 * @sma contains the semaphore structure
1128 * Return 0 if operation was successful and permission is granted.
1129 * @sem_free_security:
1130 * deallocate security struct for this semaphore
1131 * @sma contains the semaphore structure.
1133 * Check permission when a semaphore is requested through the semget
1134 * system call. This hook is only called when returning the semaphore
1135 * identifier for an existing semaphore, not when a new one must be
1137 * @sma contains the semaphore structure.
1138 * @semflg contains the operation control flags.
1139 * Return 0 if permission is granted.
1141 * Check permission when a semaphore operation specified by @cmd is to be
1142 * performed on the semaphore @sma. The @sma may be NULL, e.g. for
1143 * IPC_INFO or SEM_INFO.
1144 * @sma contains the semaphore structure. May be NULL.
1145 * @cmd contains the operation to be performed.
1146 * Return 0 if permission is granted.
1148 * Check permissions before performing operations on members of the
1149 * semaphore set @sma. If the @alter flag is nonzero, the semaphore set
1151 * @sma contains the semaphore structure.
1152 * @sops contains the operations to perform.
1153 * @nsops contains the number of operations to perform.
1154 * @alter contains the flag indicating whether changes are to be made.
1155 * Return 0 if permission is granted.
1157 * @binder_set_context_mgr:
1158 * Check whether @mgr is allowed to be the binder context manager.
1159 * @mgr contains the task_struct for the task being registered.
1160 * Return 0 if permission is granted.
1161 * @binder_transaction:
1162 * Check whether @from is allowed to invoke a binder transaction call
1164 * @from contains the task_struct for the sending task.
1165 * @to contains the task_struct for the receiving task.
1166 * @binder_transfer_binder:
1167 * Check whether @from is allowed to transfer a binder reference to @to.
1168 * @from contains the task_struct for the sending task.
1169 * @to contains the task_struct for the receiving task.
1170 * @binder_transfer_file:
1171 * Check whether @from is allowed to transfer @file to @to.
1172 * @from contains the task_struct for the sending task.
1173 * @file contains the struct file being transferred.
1174 * @to contains the task_struct for the receiving task.
1176 * @ptrace_access_check:
1177 * Check permission before allowing the current process to trace the
1179 * Security modules may also want to perform a process tracing check
1180 * during an execve in the set_security or apply_creds hooks of
1181 * tracing check during an execve in the bprm_set_creds hook of
1182 * binprm_security_ops if the process is being traced and its security
1183 * attributes would be changed by the execve.
1184 * @child contains the task_struct structure for the target process.
1185 * @mode contains the PTRACE_MODE flags indicating the form of access.
1186 * Return 0 if permission is granted.
1188 * Check that the @parent process has sufficient permission to trace the
1189 * current process before allowing the current process to present itself
1190 * to the @parent process for tracing.
1191 * @parent contains the task_struct structure for debugger process.
1192 * Return 0 if permission is granted.
1194 * Get the @effective, @inheritable, and @permitted capability sets for
1195 * the @target process. The hook may also perform permission checking to
1196 * determine if the current process is allowed to see the capability sets
1197 * of the @target process.
1198 * @target contains the task_struct structure for target process.
1199 * @effective contains the effective capability set.
1200 * @inheritable contains the inheritable capability set.
1201 * @permitted contains the permitted capability set.
1202 * Return 0 if the capability sets were successfully obtained.
1204 * Set the @effective, @inheritable, and @permitted capability sets for
1205 * the current process.
1206 * @new contains the new credentials structure for target process.
1207 * @old contains the current credentials structure for target process.
1208 * @effective contains the effective capability set.
1209 * @inheritable contains the inheritable capability set.
1210 * @permitted contains the permitted capability set.
1211 * Return 0 and update @new if permission is granted.
1213 * Check whether the @tsk process has the @cap capability in the indicated
1215 * @cred contains the credentials to use.
1216 * @ns contains the user namespace we want the capability in
1217 * @cap contains the capability <include/linux/capability.h>.
1218 * @audit contains whether to write an audit message or not
1219 * Return 0 if the capability is granted for @tsk.
1221 * Check permission before accessing the kernel message ring or changing
1222 * logging to the console.
1223 * See the syslog(2) manual page for an explanation of the @type values.
1224 * @type contains the type of action.
1225 * @from_file indicates the context of action (if it came from /proc).
1226 * Return 0 if permission is granted.
1228 * Check permission to change the system time.
1229 * struct timespec64 is defined in include/linux/time64.h and timezone
1230 * is defined in include/linux/time.h
1231 * @ts contains new time
1232 * @tz contains new timezone
1233 * Return 0 if permission is granted.
1234 * @vm_enough_memory:
1235 * Check permissions for allocating a new virtual mapping.
1236 * @mm contains the mm struct it is being added to.
1237 * @pages contains the number of pages.
1238 * Return 0 if permission is granted.
1241 * Check if the extended attribute specified by @name
1242 * represents a MAC label. Returns 1 if name is a MAC
1243 * attribute otherwise returns 0.
1244 * @name full extended attribute name to check against
1245 * LSM as a MAC label.
1248 * Convert secid to security context. If secdata is NULL the length of
1249 * the result will be returned in seclen, but no secdata will be returned.
1250 * This does mean that the length could change between calls to check the
1251 * length and the next call which actually allocates and returns the
1253 * @secid contains the security ID.
1254 * @secdata contains the pointer that stores the converted security
1256 * @seclen pointer which contains the length of the data
1258 * Convert security context to secid.
1259 * @secid contains the pointer to the generated security ID.
1260 * @secdata contains the security context.
1263 * Release the security context.
1264 * @secdata contains the security context.
1265 * @seclen contains the length of the security context.
1267 * Security hooks for Audit
1270 * Allocate and initialize an LSM audit rule structure.
1271 * @field contains the required Audit action.
1272 * Fields flags are defined in include/linux/audit.h
1273 * @op contains the operator the rule uses.
1274 * @rulestr contains the context where the rule will be applied to.
1275 * @lsmrule contains a pointer to receive the result.
1276 * Return 0 if @lsmrule has been successfully set,
1277 * -EINVAL in case of an invalid rule.
1279 * @audit_rule_known:
1280 * Specifies whether given @rule contains any fields related to
1282 * @rule contains the audit rule of interest.
1283 * Return 1 in case of relation found, 0 otherwise.
1285 * @audit_rule_match:
1286 * Determine if given @secid matches a rule previously approved
1287 * by @audit_rule_known.
1288 * @secid contains the security id in question.
1289 * @field contains the field which relates to current LSM.
1290 * @op contains the operator that will be used for matching.
1291 * @rule points to the audit rule that will be checked against.
1292 * @actx points to the audit context associated with the check.
1293 * Return 1 if secid matches the rule, 0 if it does not, -ERRNO on failure.
1296 * Deallocate the LSM audit rule structure previously allocated by
1298 * @rule contains the allocated rule
1300 * @inode_invalidate_secctx:
1301 * Notify the security module that it must revalidate the security context
1304 * @inode_notifysecctx:
1305 * Notify the security module of what the security context of an inode
1306 * should be. Initializes the incore security context managed by the
1307 * security module for this inode. Example usage: NFS client invokes
1308 * this hook to initialize the security context in its incore inode to the
1309 * value provided by the server for the file when the server returned the
1310 * file's attributes to the client.
1312 * Must be called with inode->i_mutex locked.
1314 * @inode we wish to set the security context of.
1315 * @ctx contains the string which we wish to set in the inode.
1316 * @ctxlen contains the length of @ctx.
1319 * Change the security context of an inode. Updates the
1320 * incore security context managed by the security module and invokes the
1321 * fs code as needed (via __vfs_setxattr_noperm) to update any backing
1322 * xattrs that represent the context. Example usage: NFS server invokes
1323 * this hook to change the security context in its incore inode and on the
1324 * backing filesystem to a value provided by the client on a SETATTR
1327 * Must be called with inode->i_mutex locked.
1329 * @dentry contains the inode we wish to set the security context of.
1330 * @ctx contains the string which we wish to set in the inode.
1331 * @ctxlen contains the length of @ctx.
1334 * On success, returns 0 and fills out @ctx and @ctxlen with the security
1335 * context for the given @inode.
1337 * @inode we wish to get the security context of.
1338 * @ctx is a pointer in which to place the allocated security context.
1339 * @ctxlen points to the place to put the length of @ctx.
1341 union security_list_options {
1342 int (*binder_set_context_mgr)(struct task_struct *mgr);
1343 int (*binder_transaction)(struct task_struct *from,
1344 struct task_struct *to);
1345 int (*binder_transfer_binder)(struct task_struct *from,
1346 struct task_struct *to);
1347 int (*binder_transfer_file)(struct task_struct *from,
1348 struct task_struct *to,
1351 int (*ptrace_access_check)(struct task_struct *child,
1353 int (*ptrace_traceme)(struct task_struct *parent);
1354 int (*capget)(struct task_struct *target, kernel_cap_t *effective,
1355 kernel_cap_t *inheritable, kernel_cap_t *permitted);
1356 int (*capset)(struct cred *new, const struct cred *old,
1357 const kernel_cap_t *effective,
1358 const kernel_cap_t *inheritable,
1359 const kernel_cap_t *permitted);
1360 int (*capable)(const struct cred *cred, struct user_namespace *ns,
1361 int cap, int audit);
1362 int (*quotactl)(int cmds, int type, int id, struct super_block *sb);
1363 int (*quota_on)(struct dentry *dentry);
1364 int (*syslog)(int type);
1365 int (*settime)(const struct timespec64 *ts, const struct timezone *tz);
1366 int (*vm_enough_memory)(struct mm_struct *mm, long pages);
1368 int (*bprm_set_creds)(struct linux_binprm *bprm);
1369 int (*bprm_check_security)(struct linux_binprm *bprm);
1370 int (*bprm_secureexec)(struct linux_binprm *bprm);
1371 void (*bprm_committing_creds)(struct linux_binprm *bprm);
1372 void (*bprm_committed_creds)(struct linux_binprm *bprm);
1374 int (*sb_alloc_security)(struct super_block *sb);
1375 void (*sb_free_security)(struct super_block *sb);
1376 int (*sb_copy_data)(char *orig, char *copy);
1377 int (*sb_remount)(struct super_block *sb, void *data);
1378 int (*sb_kern_mount)(struct super_block *sb, int flags, void *data);
1379 int (*sb_show_options)(struct seq_file *m, struct super_block *sb);
1380 int (*sb_statfs)(struct dentry *dentry);
1381 int (*sb_mount)(const char *dev_name, const struct path *path,
1382 const char *type, unsigned long flags, void *data);
1383 int (*sb_umount)(struct vfsmount *mnt, int flags);
1384 int (*sb_pivotroot)(const struct path *old_path, const struct path *new_path);
1385 int (*sb_set_mnt_opts)(struct super_block *sb,
1386 struct security_mnt_opts *opts,
1387 unsigned long kern_flags,
1388 unsigned long *set_kern_flags);
1389 int (*sb_clone_mnt_opts)(const struct super_block *oldsb,
1390 struct super_block *newsb);
1391 int (*sb_parse_opts_str)(char *options, struct security_mnt_opts *opts);
1392 int (*dentry_init_security)(struct dentry *dentry, int mode,
1393 const struct qstr *name, void **ctx,
1395 int (*dentry_create_files_as)(struct dentry *dentry, int mode,
1397 const struct cred *old,
1401 #ifdef CONFIG_SECURITY_PATH
1402 int (*path_unlink)(const struct path *dir, struct dentry *dentry);
1403 int (*path_mkdir)(const struct path *dir, struct dentry *dentry,
1405 int (*path_rmdir)(const struct path *dir, struct dentry *dentry);
1406 int (*path_mknod)(const struct path *dir, struct dentry *dentry,
1407 umode_t mode, unsigned int dev);
1408 int (*path_truncate)(const struct path *path);
1409 int (*path_symlink)(const struct path *dir, struct dentry *dentry,
1410 const char *old_name);
1411 int (*path_link)(struct dentry *old_dentry, const struct path *new_dir,
1412 struct dentry *new_dentry);
1413 int (*path_rename)(const struct path *old_dir, struct dentry *old_dentry,
1414 const struct path *new_dir,
1415 struct dentry *new_dentry);
1416 int (*path_chmod)(const struct path *path, umode_t mode);
1417 int (*path_chown)(const struct path *path, kuid_t uid, kgid_t gid);
1418 int (*path_chroot)(const struct path *path);
1421 int (*inode_alloc_security)(struct inode *inode);
1422 void (*inode_free_security)(struct inode *inode);
1423 int (*inode_init_security)(struct inode *inode, struct inode *dir,
1424 const struct qstr *qstr,
1425 const char **name, void **value,
1427 int (*inode_create)(struct inode *dir, struct dentry *dentry,
1429 int (*inode_link)(struct dentry *old_dentry, struct inode *dir,
1430 struct dentry *new_dentry);
1431 int (*inode_unlink)(struct inode *dir, struct dentry *dentry);
1432 int (*inode_symlink)(struct inode *dir, struct dentry *dentry,
1433 const char *old_name);
1434 int (*inode_mkdir)(struct inode *dir, struct dentry *dentry,
1436 int (*inode_rmdir)(struct inode *dir, struct dentry *dentry);
1437 int (*inode_mknod)(struct inode *dir, struct dentry *dentry,
1438 umode_t mode, dev_t dev);
1439 int (*inode_rename)(struct inode *old_dir, struct dentry *old_dentry,
1440 struct inode *new_dir,
1441 struct dentry *new_dentry);
1442 int (*inode_readlink)(struct dentry *dentry);
1443 int (*inode_follow_link)(struct dentry *dentry, struct inode *inode,
1445 int (*inode_permission)(struct inode *inode, int mask);
1446 int (*inode_setattr)(struct dentry *dentry, struct iattr *attr);
1447 int (*inode_getattr)(const struct path *path);
1448 int (*inode_setxattr)(struct dentry *dentry, const char *name,
1449 const void *value, size_t size, int flags);
1450 void (*inode_post_setxattr)(struct dentry *dentry, const char *name,
1451 const void *value, size_t size,
1453 int (*inode_getxattr)(struct dentry *dentry, const char *name);
1454 int (*inode_listxattr)(struct dentry *dentry);
1455 int (*inode_removexattr)(struct dentry *dentry, const char *name);
1456 int (*inode_need_killpriv)(struct dentry *dentry);
1457 int (*inode_killpriv)(struct dentry *dentry);
1458 int (*inode_getsecurity)(struct inode *inode, const char *name,
1459 void **buffer, bool alloc);
1460 int (*inode_setsecurity)(struct inode *inode, const char *name,
1461 const void *value, size_t size,
1463 int (*inode_listsecurity)(struct inode *inode, char *buffer,
1464 size_t buffer_size);
1465 void (*inode_getsecid)(struct inode *inode, u32 *secid);
1466 int (*inode_copy_up)(struct dentry *src, struct cred **new);
1467 int (*inode_copy_up_xattr)(const char *name);
1469 int (*file_permission)(struct file *file, int mask);
1470 int (*file_alloc_security)(struct file *file);
1471 void (*file_free_security)(struct file *file);
1472 int (*file_ioctl)(struct file *file, unsigned int cmd,
1474 int (*mmap_addr)(unsigned long addr);
1475 int (*mmap_file)(struct file *file, unsigned long reqprot,
1476 unsigned long prot, unsigned long flags);
1477 int (*file_mprotect)(struct vm_area_struct *vma, unsigned long reqprot,
1478 unsigned long prot);
1479 int (*file_lock)(struct file *file, unsigned int cmd);
1480 int (*file_fcntl)(struct file *file, unsigned int cmd,
1482 void (*file_set_fowner)(struct file *file);
1483 int (*file_send_sigiotask)(struct task_struct *tsk,
1484 struct fown_struct *fown, int sig);
1485 int (*file_receive)(struct file *file);
1486 int (*file_open)(struct file *file, const struct cred *cred);
1488 int (*task_create)(unsigned long clone_flags);
1489 int (*task_alloc)(struct task_struct *task, unsigned long clone_flags);
1490 void (*task_free)(struct task_struct *task);
1491 int (*cred_alloc_blank)(struct cred *cred, gfp_t gfp);
1492 void (*cred_free)(struct cred *cred);
1493 int (*cred_prepare)(struct cred *new, const struct cred *old,
1495 void (*cred_transfer)(struct cred *new, const struct cred *old);
1496 int (*kernel_act_as)(struct cred *new, u32 secid);
1497 int (*kernel_create_files_as)(struct cred *new, struct inode *inode);
1498 int (*kernel_module_request)(char *kmod_name);
1499 int (*kernel_read_file)(struct file *file, enum kernel_read_file_id id);
1500 int (*kernel_post_read_file)(struct file *file, char *buf, loff_t size,
1501 enum kernel_read_file_id id);
1502 int (*task_fix_setuid)(struct cred *new, const struct cred *old,
1504 int (*task_setpgid)(struct task_struct *p, pid_t pgid);
1505 int (*task_getpgid)(struct task_struct *p);
1506 int (*task_getsid)(struct task_struct *p);
1507 void (*task_getsecid)(struct task_struct *p, u32 *secid);
1508 int (*task_setnice)(struct task_struct *p, int nice);
1509 int (*task_setioprio)(struct task_struct *p, int ioprio);
1510 int (*task_getioprio)(struct task_struct *p);
1511 int (*task_prlimit)(const struct cred *cred, const struct cred *tcred,
1512 unsigned int flags);
1513 int (*task_setrlimit)(struct task_struct *p, unsigned int resource,
1514 struct rlimit *new_rlim);
1515 int (*task_setscheduler)(struct task_struct *p);
1516 int (*task_getscheduler)(struct task_struct *p);
1517 int (*task_movememory)(struct task_struct *p);
1518 int (*task_kill)(struct task_struct *p, struct siginfo *info,
1519 int sig, u32 secid);
1520 int (*task_prctl)(int option, unsigned long arg2, unsigned long arg3,
1521 unsigned long arg4, unsigned long arg5);
1522 void (*task_to_inode)(struct task_struct *p, struct inode *inode);
1524 int (*ipc_permission)(struct kern_ipc_perm *ipcp, short flag);
1525 void (*ipc_getsecid)(struct kern_ipc_perm *ipcp, u32 *secid);
1527 int (*msg_msg_alloc_security)(struct msg_msg *msg);
1528 void (*msg_msg_free_security)(struct msg_msg *msg);
1530 int (*msg_queue_alloc_security)(struct msg_queue *msq);
1531 void (*msg_queue_free_security)(struct msg_queue *msq);
1532 int (*msg_queue_associate)(struct msg_queue *msq, int msqflg);
1533 int (*msg_queue_msgctl)(struct msg_queue *msq, int cmd);
1534 int (*msg_queue_msgsnd)(struct msg_queue *msq, struct msg_msg *msg,
1536 int (*msg_queue_msgrcv)(struct msg_queue *msq, struct msg_msg *msg,
1537 struct task_struct *target, long type,
1540 int (*shm_alloc_security)(struct shmid_kernel *shp);
1541 void (*shm_free_security)(struct shmid_kernel *shp);
1542 int (*shm_associate)(struct shmid_kernel *shp, int shmflg);
1543 int (*shm_shmctl)(struct shmid_kernel *shp, int cmd);
1544 int (*shm_shmat)(struct shmid_kernel *shp, char __user *shmaddr,
1547 int (*sem_alloc_security)(struct sem_array *sma);
1548 void (*sem_free_security)(struct sem_array *sma);
1549 int (*sem_associate)(struct sem_array *sma, int semflg);
1550 int (*sem_semctl)(struct sem_array *sma, int cmd);
1551 int (*sem_semop)(struct sem_array *sma, struct sembuf *sops,
1552 unsigned nsops, int alter);
1554 int (*netlink_send)(struct sock *sk, struct sk_buff *skb);
1556 void (*d_instantiate)(struct dentry *dentry, struct inode *inode);
1558 int (*getprocattr)(struct task_struct *p, char *name, char **value);
1559 int (*setprocattr)(const char *name, void *value, size_t size);
1560 int (*ismaclabel)(const char *name);
1561 int (*secid_to_secctx)(u32 secid, char **secdata, u32 *seclen);
1562 int (*secctx_to_secid)(const char *secdata, u32 seclen, u32 *secid);
1563 void (*release_secctx)(char *secdata, u32 seclen);
1565 void (*inode_invalidate_secctx)(struct inode *inode);
1566 int (*inode_notifysecctx)(struct inode *inode, void *ctx, u32 ctxlen);
1567 int (*inode_setsecctx)(struct dentry *dentry, void *ctx, u32 ctxlen);
1568 int (*inode_getsecctx)(struct inode *inode, void **ctx, u32 *ctxlen);
1570 #ifdef CONFIG_SECURITY_NETWORK
1571 int (*unix_stream_connect)(struct sock *sock, struct sock *other,
1572 struct sock *newsk);
1573 int (*unix_may_send)(struct socket *sock, struct socket *other);
1575 int (*socket_create)(int family, int type, int protocol, int kern);
1576 int (*socket_post_create)(struct socket *sock, int family, int type,
1577 int protocol, int kern);
1578 int (*socket_bind)(struct socket *sock, struct sockaddr *address,
1580 int (*socket_connect)(struct socket *sock, struct sockaddr *address,
1582 int (*socket_listen)(struct socket *sock, int backlog);
1583 int (*socket_accept)(struct socket *sock, struct socket *newsock);
1584 int (*socket_sendmsg)(struct socket *sock, struct msghdr *msg,
1586 int (*socket_recvmsg)(struct socket *sock, struct msghdr *msg,
1587 int size, int flags);
1588 int (*socket_getsockname)(struct socket *sock);
1589 int (*socket_getpeername)(struct socket *sock);
1590 int (*socket_getsockopt)(struct socket *sock, int level, int optname);
1591 int (*socket_setsockopt)(struct socket *sock, int level, int optname);
1592 int (*socket_shutdown)(struct socket *sock, int how);
1593 int (*socket_sock_rcv_skb)(struct sock *sk, struct sk_buff *skb);
1594 int (*socket_getpeersec_stream)(struct socket *sock,
1595 char __user *optval,
1596 int __user *optlen, unsigned len);
1597 int (*socket_getpeersec_dgram)(struct socket *sock,
1598 struct sk_buff *skb, u32 *secid);
1599 int (*sk_alloc_security)(struct sock *sk, int family, gfp_t priority);
1600 void (*sk_free_security)(struct sock *sk);
1601 void (*sk_clone_security)(const struct sock *sk, struct sock *newsk);
1602 void (*sk_getsecid)(struct sock *sk, u32 *secid);
1603 void (*sock_graft)(struct sock *sk, struct socket *parent);
1604 int (*inet_conn_request)(struct sock *sk, struct sk_buff *skb,
1605 struct request_sock *req);
1606 void (*inet_csk_clone)(struct sock *newsk,
1607 const struct request_sock *req);
1608 void (*inet_conn_established)(struct sock *sk, struct sk_buff *skb);
1609 int (*secmark_relabel_packet)(u32 secid);
1610 void (*secmark_refcount_inc)(void);
1611 void (*secmark_refcount_dec)(void);
1612 void (*req_classify_flow)(const struct request_sock *req,
1614 int (*tun_dev_alloc_security)(void **security);
1615 void (*tun_dev_free_security)(void *security);
1616 int (*tun_dev_create)(void);
1617 int (*tun_dev_attach_queue)(void *security);
1618 int (*tun_dev_attach)(struct sock *sk, void *security);
1619 int (*tun_dev_open)(void *security);
1620 #endif /* CONFIG_SECURITY_NETWORK */
1622 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1623 int (*xfrm_policy_alloc_security)(struct xfrm_sec_ctx **ctxp,
1624 struct xfrm_user_sec_ctx *sec_ctx,
1626 int (*xfrm_policy_clone_security)(struct xfrm_sec_ctx *old_ctx,
1627 struct xfrm_sec_ctx **new_ctx);
1628 void (*xfrm_policy_free_security)(struct xfrm_sec_ctx *ctx);
1629 int (*xfrm_policy_delete_security)(struct xfrm_sec_ctx *ctx);
1630 int (*xfrm_state_alloc)(struct xfrm_state *x,
1631 struct xfrm_user_sec_ctx *sec_ctx);
1632 int (*xfrm_state_alloc_acquire)(struct xfrm_state *x,
1633 struct xfrm_sec_ctx *polsec,
1635 void (*xfrm_state_free_security)(struct xfrm_state *x);
1636 int (*xfrm_state_delete_security)(struct xfrm_state *x);
1637 int (*xfrm_policy_lookup)(struct xfrm_sec_ctx *ctx, u32 fl_secid,
1639 int (*xfrm_state_pol_flow_match)(struct xfrm_state *x,
1640 struct xfrm_policy *xp,
1641 const struct flowi *fl);
1642 int (*xfrm_decode_session)(struct sk_buff *skb, u32 *secid, int ckall);
1643 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
1645 /* key management security hooks */
1647 int (*key_alloc)(struct key *key, const struct cred *cred,
1648 unsigned long flags);
1649 void (*key_free)(struct key *key);
1650 int (*key_permission)(key_ref_t key_ref, const struct cred *cred,
1652 int (*key_getsecurity)(struct key *key, char **_buffer);
1653 #endif /* CONFIG_KEYS */
1656 int (*audit_rule_init)(u32 field, u32 op, char *rulestr,
1658 int (*audit_rule_known)(struct audit_krule *krule);
1659 int (*audit_rule_match)(u32 secid, u32 field, u32 op, void *lsmrule,
1660 struct audit_context *actx);
1661 void (*audit_rule_free)(void *lsmrule);
1662 #endif /* CONFIG_AUDIT */
1665 struct security_hook_heads {
1666 struct list_head binder_set_context_mgr;
1667 struct list_head binder_transaction;
1668 struct list_head binder_transfer_binder;
1669 struct list_head binder_transfer_file;
1670 struct list_head ptrace_access_check;
1671 struct list_head ptrace_traceme;
1672 struct list_head capget;
1673 struct list_head capset;
1674 struct list_head capable;
1675 struct list_head quotactl;
1676 struct list_head quota_on;
1677 struct list_head syslog;
1678 struct list_head settime;
1679 struct list_head vm_enough_memory;
1680 struct list_head bprm_set_creds;
1681 struct list_head bprm_check_security;
1682 struct list_head bprm_secureexec;
1683 struct list_head bprm_committing_creds;
1684 struct list_head bprm_committed_creds;
1685 struct list_head sb_alloc_security;
1686 struct list_head sb_free_security;
1687 struct list_head sb_copy_data;
1688 struct list_head sb_remount;
1689 struct list_head sb_kern_mount;
1690 struct list_head sb_show_options;
1691 struct list_head sb_statfs;
1692 struct list_head sb_mount;
1693 struct list_head sb_umount;
1694 struct list_head sb_pivotroot;
1695 struct list_head sb_set_mnt_opts;
1696 struct list_head sb_clone_mnt_opts;
1697 struct list_head sb_parse_opts_str;
1698 struct list_head dentry_init_security;
1699 struct list_head dentry_create_files_as;
1700 #ifdef CONFIG_SECURITY_PATH
1701 struct list_head path_unlink;
1702 struct list_head path_mkdir;
1703 struct list_head path_rmdir;
1704 struct list_head path_mknod;
1705 struct list_head path_truncate;
1706 struct list_head path_symlink;
1707 struct list_head path_link;
1708 struct list_head path_rename;
1709 struct list_head path_chmod;
1710 struct list_head path_chown;
1711 struct list_head path_chroot;
1713 struct list_head inode_alloc_security;
1714 struct list_head inode_free_security;
1715 struct list_head inode_init_security;
1716 struct list_head inode_create;
1717 struct list_head inode_link;
1718 struct list_head inode_unlink;
1719 struct list_head inode_symlink;
1720 struct list_head inode_mkdir;
1721 struct list_head inode_rmdir;
1722 struct list_head inode_mknod;
1723 struct list_head inode_rename;
1724 struct list_head inode_readlink;
1725 struct list_head inode_follow_link;
1726 struct list_head inode_permission;
1727 struct list_head inode_setattr;
1728 struct list_head inode_getattr;
1729 struct list_head inode_setxattr;
1730 struct list_head inode_post_setxattr;
1731 struct list_head inode_getxattr;
1732 struct list_head inode_listxattr;
1733 struct list_head inode_removexattr;
1734 struct list_head inode_need_killpriv;
1735 struct list_head inode_killpriv;
1736 struct list_head inode_getsecurity;
1737 struct list_head inode_setsecurity;
1738 struct list_head inode_listsecurity;
1739 struct list_head inode_getsecid;
1740 struct list_head inode_copy_up;
1741 struct list_head inode_copy_up_xattr;
1742 struct list_head file_permission;
1743 struct list_head file_alloc_security;
1744 struct list_head file_free_security;
1745 struct list_head file_ioctl;
1746 struct list_head mmap_addr;
1747 struct list_head mmap_file;
1748 struct list_head file_mprotect;
1749 struct list_head file_lock;
1750 struct list_head file_fcntl;
1751 struct list_head file_set_fowner;
1752 struct list_head file_send_sigiotask;
1753 struct list_head file_receive;
1754 struct list_head file_open;
1755 struct list_head task_create;
1756 struct list_head task_alloc;
1757 struct list_head task_free;
1758 struct list_head cred_alloc_blank;
1759 struct list_head cred_free;
1760 struct list_head cred_prepare;
1761 struct list_head cred_transfer;
1762 struct list_head kernel_act_as;
1763 struct list_head kernel_create_files_as;
1764 struct list_head kernel_read_file;
1765 struct list_head kernel_post_read_file;
1766 struct list_head kernel_module_request;
1767 struct list_head task_fix_setuid;
1768 struct list_head task_setpgid;
1769 struct list_head task_getpgid;
1770 struct list_head task_getsid;
1771 struct list_head task_getsecid;
1772 struct list_head task_setnice;
1773 struct list_head task_setioprio;
1774 struct list_head task_getioprio;
1775 struct list_head task_prlimit;
1776 struct list_head task_setrlimit;
1777 struct list_head task_setscheduler;
1778 struct list_head task_getscheduler;
1779 struct list_head task_movememory;
1780 struct list_head task_kill;
1781 struct list_head task_prctl;
1782 struct list_head task_to_inode;
1783 struct list_head ipc_permission;
1784 struct list_head ipc_getsecid;
1785 struct list_head msg_msg_alloc_security;
1786 struct list_head msg_msg_free_security;
1787 struct list_head msg_queue_alloc_security;
1788 struct list_head msg_queue_free_security;
1789 struct list_head msg_queue_associate;
1790 struct list_head msg_queue_msgctl;
1791 struct list_head msg_queue_msgsnd;
1792 struct list_head msg_queue_msgrcv;
1793 struct list_head shm_alloc_security;
1794 struct list_head shm_free_security;
1795 struct list_head shm_associate;
1796 struct list_head shm_shmctl;
1797 struct list_head shm_shmat;
1798 struct list_head sem_alloc_security;
1799 struct list_head sem_free_security;
1800 struct list_head sem_associate;
1801 struct list_head sem_semctl;
1802 struct list_head sem_semop;
1803 struct list_head netlink_send;
1804 struct list_head d_instantiate;
1805 struct list_head getprocattr;
1806 struct list_head setprocattr;
1807 struct list_head ismaclabel;
1808 struct list_head secid_to_secctx;
1809 struct list_head secctx_to_secid;
1810 struct list_head release_secctx;
1811 struct list_head inode_invalidate_secctx;
1812 struct list_head inode_notifysecctx;
1813 struct list_head inode_setsecctx;
1814 struct list_head inode_getsecctx;
1815 #ifdef CONFIG_SECURITY_NETWORK
1816 struct list_head unix_stream_connect;
1817 struct list_head unix_may_send;
1818 struct list_head socket_create;
1819 struct list_head socket_post_create;
1820 struct list_head socket_bind;
1821 struct list_head socket_connect;
1822 struct list_head socket_listen;
1823 struct list_head socket_accept;
1824 struct list_head socket_sendmsg;
1825 struct list_head socket_recvmsg;
1826 struct list_head socket_getsockname;
1827 struct list_head socket_getpeername;
1828 struct list_head socket_getsockopt;
1829 struct list_head socket_setsockopt;
1830 struct list_head socket_shutdown;
1831 struct list_head socket_sock_rcv_skb;
1832 struct list_head socket_getpeersec_stream;
1833 struct list_head socket_getpeersec_dgram;
1834 struct list_head sk_alloc_security;
1835 struct list_head sk_free_security;
1836 struct list_head sk_clone_security;
1837 struct list_head sk_getsecid;
1838 struct list_head sock_graft;
1839 struct list_head inet_conn_request;
1840 struct list_head inet_csk_clone;
1841 struct list_head inet_conn_established;
1842 struct list_head secmark_relabel_packet;
1843 struct list_head secmark_refcount_inc;
1844 struct list_head secmark_refcount_dec;
1845 struct list_head req_classify_flow;
1846 struct list_head tun_dev_alloc_security;
1847 struct list_head tun_dev_free_security;
1848 struct list_head tun_dev_create;
1849 struct list_head tun_dev_attach_queue;
1850 struct list_head tun_dev_attach;
1851 struct list_head tun_dev_open;
1852 #endif /* CONFIG_SECURITY_NETWORK */
1853 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1854 struct list_head xfrm_policy_alloc_security;
1855 struct list_head xfrm_policy_clone_security;
1856 struct list_head xfrm_policy_free_security;
1857 struct list_head xfrm_policy_delete_security;
1858 struct list_head xfrm_state_alloc;
1859 struct list_head xfrm_state_alloc_acquire;
1860 struct list_head xfrm_state_free_security;
1861 struct list_head xfrm_state_delete_security;
1862 struct list_head xfrm_policy_lookup;
1863 struct list_head xfrm_state_pol_flow_match;
1864 struct list_head xfrm_decode_session;
1865 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
1867 struct list_head key_alloc;
1868 struct list_head key_free;
1869 struct list_head key_permission;
1870 struct list_head key_getsecurity;
1871 #endif /* CONFIG_KEYS */
1873 struct list_head audit_rule_init;
1874 struct list_head audit_rule_known;
1875 struct list_head audit_rule_match;
1876 struct list_head audit_rule_free;
1877 #endif /* CONFIG_AUDIT */
1881 * Security module hook list structure.
1882 * For use with generic list macros for common operations.
1884 struct security_hook_list {
1885 struct list_head list;
1886 struct list_head *head;
1887 union security_list_options hook;
1892 * Initializing a security_hook_list structure takes
1893 * up a lot of space in a source file. This macro takes
1894 * care of the common case and reduces the amount of
1897 #define LSM_HOOK_INIT(HEAD, HOOK) \
1898 { .head = &security_hook_heads.HEAD, .hook = { .HEAD = HOOK } }
1900 extern struct security_hook_heads security_hook_heads;
1901 extern char *lsm_names;
1903 extern void security_add_hooks(struct security_hook_list *hooks, int count,
1906 #ifdef CONFIG_SECURITY_SELINUX_DISABLE
1908 * Assuring the safety of deleting a security module is up to
1909 * the security module involved. This may entail ordering the
1910 * module's hook list in a particular way, refusing to disable
1911 * the module once a policy is loaded or any number of other
1912 * actions better imagined than described.
1914 * The name of the configuration option reflects the only module
1915 * that currently uses the mechanism. Any developer who thinks
1916 * disabling their module is a good idea needs to be at least as
1917 * careful as the SELinux team.
1919 static inline void security_delete_hooks(struct security_hook_list *hooks,
1924 for (i = 0; i < count; i++)
1925 list_del_rcu(&hooks[i].list);
1927 #endif /* CONFIG_SECURITY_SELINUX_DISABLE */
1929 /* Currently required to handle SELinux runtime hook disable. */
1930 #ifdef CONFIG_SECURITY_WRITABLE_HOOKS
1931 #define __lsm_ro_after_init
1933 #define __lsm_ro_after_init __ro_after_init
1934 #endif /* CONFIG_SECURITY_WRITABLE_HOOKS */
1936 extern int __init security_module_enable(const char *module);
1937 extern void __init capability_add_hooks(void);
1938 #ifdef CONFIG_SECURITY_YAMA
1939 extern void __init yama_add_hooks(void);
1941 static inline void __init yama_add_hooks(void) { }
1943 #ifdef CONFIG_SECURITY_LOADPIN
1944 void __init loadpin_add_hooks(void);
1946 static inline void loadpin_add_hooks(void) { };
1949 #endif /* ! __LINUX_LSM_HOOKS_H */
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