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>
11 * Copyright (C) 2016 Mellanox Techonologies
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * Due to this file being licensed under the GPL there is controversy over
19 * whether this permits you to write a module that #includes this file
20 * without placing your module under the GPL. Please consult a lawyer for
21 * advice before doing this.
25 #ifndef __LINUX_LSM_HOOKS_H
26 #define __LINUX_LSM_HOOKS_H
28 #include <linux/security.h>
29 #include <linux/init.h>
30 #include <linux/rculist.h>
33 * union security_list_options - Linux Security Module hook function list
35 * Security hooks for program execution operations.
38 * Save security information in the bprm->security field, typically based
39 * on information about the bprm->file, for later use by the apply_creds
40 * hook. This hook may also optionally check permissions (e.g. for
41 * transitions between security domains).
42 * This hook may be called multiple times during a single execve, e.g. for
43 * interpreters. The hook can tell whether it has already been called by
44 * checking to see if @bprm->security is non-NULL. If so, then the hook
45 * may decide either to retain the security information saved earlier or
46 * to replace it. The hook must set @bprm->secureexec to 1 if a "secure
47 * exec" has happened as a result of this hook call. The flag is used to
48 * indicate the need for a sanitized execution environment, and is also
49 * passed in the ELF auxiliary table on the initial stack to indicate
50 * whether libc should enable secure mode.
51 * @bprm contains the linux_binprm structure.
52 * Return 0 if the hook is successful and permission is granted.
53 * @bprm_check_security:
54 * This hook mediates the point when a search for a binary handler will
55 * begin. It allows a check the @bprm->security value which is set in the
56 * preceding set_creds call. The primary difference from set_creds is
57 * that the argv list and envp list are reliably available in @bprm. This
58 * hook may be called multiple times during a single execve; and in each
59 * pass set_creds is called first.
60 * @bprm contains the linux_binprm structure.
61 * Return 0 if the hook is successful and permission is granted.
62 * @bprm_committing_creds:
63 * Prepare to install the new security attributes of a process being
64 * transformed by an execve operation, based on the old credentials
65 * pointed to by @current->cred and the information set in @bprm->cred by
66 * the bprm_set_creds hook. @bprm points to the linux_binprm structure.
67 * This hook is a good place to perform state changes on the process such
68 * as closing open file descriptors to which access will no longer be
69 * granted when the attributes are changed. This is called immediately
70 * before commit_creds().
71 * @bprm_committed_creds:
72 * Tidy up after the installation of the new security attributes of a
73 * process being transformed by an execve operation. The new credentials
74 * have, by this point, been set to @current->cred. @bprm points to the
75 * linux_binprm structure. This hook is a good place to perform state
76 * changes on the process such as clearing out non-inheritable signal
77 * state. This is called immediately after commit_creds().
79 * Security hooks for filesystem operations.
82 * Allocate and attach a security structure to the sb->s_security field.
83 * The s_security field is initialized to NULL when the structure is
85 * @sb contains the super_block structure to be modified.
86 * Return 0 if operation was successful.
88 * Deallocate and clear the sb->s_security field.
89 * @sb contains the super_block structure to be modified.
91 * Check permission before obtaining filesystem statistics for the @mnt
93 * @dentry is a handle on the superblock for the filesystem.
94 * Return 0 if permission is granted.
96 * Check permission before an object specified by @dev_name is mounted on
97 * the mount point named by @nd. For an ordinary mount, @dev_name
98 * identifies a device if the file system type requires a device. For a
99 * remount (@flags & MS_REMOUNT), @dev_name is irrelevant. For a
100 * loopback/bind mount (@flags & MS_BIND), @dev_name identifies the
101 * pathname of the object being mounted.
102 * @dev_name contains the name for object being mounted.
103 * @path contains the path for mount point object.
104 * @type contains the filesystem type.
105 * @flags contains the mount flags.
106 * @data contains the filesystem-specific data.
107 * Return 0 if permission is granted.
109 * Allow mount option data to be copied prior to parsing by the filesystem,
110 * so that the security module can extract security-specific mount
111 * options cleanly (a filesystem may modify the data e.g. with strsep()).
112 * This also allows the original mount data to be stripped of security-
113 * specific options to avoid having to make filesystems aware of them.
114 * @type the type of filesystem being mounted.
115 * @orig the original mount data copied from userspace.
116 * @copy copied data which will be passed to the security module.
117 * Returns 0 if the copy was successful.
119 * Extracts security system specific mount options and verifies no changes
120 * are being made to those options.
121 * @sb superblock being remounted
122 * @data contains the filesystem-specific data.
123 * Return 0 if permission is granted.
125 * Check permission before the @mnt file system is unmounted.
126 * @mnt contains the mounted file system.
127 * @flags contains the unmount flags, e.g. MNT_FORCE.
128 * Return 0 if permission is granted.
130 * Check permission before pivoting the root filesystem.
131 * @old_path contains the path for the new location of the
132 * current root (put_old).
133 * @new_path contains the path for the new root (new_root).
134 * Return 0 if permission is granted.
136 * Set the security relevant mount options used for a superblock
137 * @sb the superblock to set security mount options for
138 * @opts binary data structure containing all lsm mount data
139 * @sb_clone_mnt_opts:
140 * Copy all security options from a given superblock to another
141 * @oldsb old superblock which contain information to clone
142 * @newsb new superblock which needs filled in
143 * @sb_parse_opts_str:
144 * Parse a string of security data filling in the opts structure
145 * @options string containing all mount options known by the LSM
146 * @opts binary data structure usable by the LSM
147 * @dentry_init_security:
148 * Compute a context for a dentry as the inode is not yet available
149 * since NFSv4 has no label backed by an EA anyway.
150 * @dentry dentry to use in calculating the context.
151 * @mode mode used to determine resource type.
152 * @name name of the last path component used to create file
153 * @ctx pointer to place the pointer to the resulting context in.
154 * @ctxlen point to place the length of the resulting context.
155 * @dentry_create_files_as:
156 * Compute a context for a dentry as the inode is not yet available
157 * and set that context in passed in creds so that new files are
158 * created using that context. Context is calculated using the
159 * passed in creds and not the creds of the caller.
160 * @dentry dentry to use in calculating the context.
161 * @mode mode used to determine resource type.
162 * @name name of the last path component used to create file
163 * @old creds which should be used for context calculation
164 * @new creds to modify
167 * Security hooks for inode operations.
169 * @inode_alloc_security:
170 * Allocate and attach a security structure to @inode->i_security. The
171 * i_security field is initialized to NULL when the inode structure is
173 * @inode contains the inode structure.
174 * Return 0 if operation was successful.
175 * @inode_free_security:
176 * @inode contains the inode structure.
177 * Deallocate the inode security structure and set @inode->i_security to
179 * @inode_init_security:
180 * Obtain the security attribute name suffix and value to set on a newly
181 * created inode and set up the incore security field for the new inode.
182 * This hook is called by the fs code as part of the inode creation
183 * transaction and provides for atomic labeling of the inode, unlike
184 * the post_create/mkdir/... hooks called by the VFS. The hook function
185 * is expected to allocate the name and value via kmalloc, with the caller
186 * being responsible for calling kfree after using them.
187 * If the security module does not use security attributes or does
188 * not wish to put a security attribute on this particular inode,
189 * then it should return -EOPNOTSUPP to skip this processing.
190 * @inode contains the inode structure of the newly created inode.
191 * @dir contains the inode structure of the parent directory.
192 * @qstr contains the last path component of the new object
193 * @name will be set to the allocated name suffix (e.g. selinux).
194 * @value will be set to the allocated attribute value.
195 * @len will be set to the length of the value.
196 * Returns 0 if @name and @value have been successfully set,
197 * -EOPNOTSUPP if no security attribute is needed, or
198 * -ENOMEM on memory allocation failure.
200 * Check permission to create a regular file.
201 * @dir contains inode structure of the parent of the new file.
202 * @dentry contains the dentry structure for the file to be created.
203 * @mode contains the file mode of the file to be created.
204 * Return 0 if permission is granted.
206 * Check permission before creating a new hard link to a file.
207 * @old_dentry contains the dentry structure for an existing
209 * @dir contains the inode structure of the parent directory
211 * @new_dentry contains the dentry structure for the new link.
212 * Return 0 if permission is granted.
214 * Check permission before creating a new hard link to a file.
215 * @old_dentry contains the dentry structure for an existing link
217 * @new_dir contains the path structure of the parent directory of
219 * @new_dentry contains the dentry structure for the new link.
220 * Return 0 if permission is granted.
222 * Check the permission to remove a hard link to a file.
223 * @dir contains the inode structure of parent directory of the file.
224 * @dentry contains the dentry structure for file to be unlinked.
225 * Return 0 if permission is granted.
227 * Check the permission to remove a hard link to a file.
228 * @dir contains the path structure of parent directory of the file.
229 * @dentry contains the dentry structure for file to be unlinked.
230 * Return 0 if permission is granted.
232 * Check the permission to create a symbolic link to a file.
233 * @dir contains the inode structure of parent directory of
235 * @dentry contains the dentry structure of the symbolic link.
236 * @old_name contains the pathname of file.
237 * Return 0 if permission is granted.
239 * Check the permission to create a symbolic link to a file.
240 * @dir contains the path structure of parent directory of
242 * @dentry contains the dentry structure of the symbolic link.
243 * @old_name contains the pathname of file.
244 * Return 0 if permission is granted.
246 * Check permissions to create a new directory in the existing directory
247 * associated with inode structure @dir.
248 * @dir contains the inode structure of parent of the directory
250 * @dentry contains the dentry structure of new directory.
251 * @mode contains the mode of new directory.
252 * Return 0 if permission is granted.
254 * Check permissions to create a new directory in the existing directory
255 * associated with path structure @path.
256 * @dir contains the path structure of parent of the directory
258 * @dentry contains the dentry structure of new directory.
259 * @mode contains the mode of new directory.
260 * Return 0 if permission is granted.
262 * Check the permission to remove a directory.
263 * @dir contains the inode structure of parent of the directory
265 * @dentry contains the dentry structure of directory to be removed.
266 * Return 0 if permission is granted.
268 * Check the permission to remove a directory.
269 * @dir contains the path structure of parent of the directory to be
271 * @dentry contains the dentry structure of directory to be removed.
272 * Return 0 if permission is granted.
274 * Check permissions when creating a special file (or a socket or a fifo
275 * file created via the mknod system call). Note that if mknod operation
276 * is being done for a regular file, then the create hook will be called
278 * @dir contains the inode structure of parent of the new file.
279 * @dentry contains the dentry structure of the new file.
280 * @mode contains the mode of the new file.
281 * @dev contains the device number.
282 * Return 0 if permission is granted.
284 * Check permissions when creating a file. Note that this hook is called
285 * even if mknod operation is being done for a regular file.
286 * @dir contains the path structure of parent of the new file.
287 * @dentry contains the dentry structure of the new file.
288 * @mode contains the mode of the new file.
289 * @dev contains the undecoded device number. Use new_decode_dev() to get
290 * the decoded device number.
291 * Return 0 if permission is granted.
293 * Check for permission to rename a file or directory.
294 * @old_dir contains the inode structure for parent of the old link.
295 * @old_dentry contains the dentry structure of the old link.
296 * @new_dir contains the inode structure for parent of the new link.
297 * @new_dentry contains the dentry structure of the new link.
298 * Return 0 if permission is granted.
300 * Check for permission to rename a file or directory.
301 * @old_dir contains the path structure for parent of the old link.
302 * @old_dentry contains the dentry structure of the old link.
303 * @new_dir contains the path structure for parent of the new link.
304 * @new_dentry contains the dentry structure of the new link.
305 * Return 0 if permission is granted.
307 * Check for permission to change DAC's permission of a file or directory.
308 * @dentry contains the dentry structure.
309 * @mnt contains the vfsmnt structure.
310 * @mode contains DAC's mode.
311 * Return 0 if permission is granted.
313 * Check for permission to change owner/group of a file or directory.
314 * @path contains the path structure.
315 * @uid contains new owner's ID.
316 * @gid contains new group's ID.
317 * Return 0 if permission is granted.
319 * Check for permission to change root directory.
320 * @path contains the path structure.
321 * Return 0 if permission is granted.
323 * Check the permission to read the symbolic link.
324 * @dentry contains the dentry structure for the file link.
325 * Return 0 if permission is granted.
326 * @inode_follow_link:
327 * Check permission to follow a symbolic link when looking up a pathname.
328 * @dentry contains the dentry structure for the link.
329 * @inode contains the inode, which itself is not stable in RCU-walk
330 * @rcu indicates whether we are in RCU-walk mode.
331 * Return 0 if permission is granted.
333 * Check permission before accessing an inode. This hook is called by the
334 * existing Linux permission function, so a security module can use it to
335 * provide additional checking for existing Linux permission checks.
336 * Notice that this hook is called when a file is opened (as well as many
337 * other operations), whereas the file_security_ops permission hook is
338 * called when the actual read/write operations are performed.
339 * @inode contains the inode structure to check.
340 * @mask contains the permission mask.
341 * Return 0 if permission is granted.
343 * Check permission before setting file attributes. Note that the kernel
344 * call to notify_change is performed from several locations, whenever
345 * file attributes change (such as when a file is truncated, chown/chmod
346 * operations, transferring disk quotas, etc).
347 * @dentry contains the dentry structure for the file.
348 * @attr is the iattr structure containing the new file attributes.
349 * Return 0 if permission is granted.
351 * Check permission before truncating a file.
352 * @path contains the path structure for the file.
353 * Return 0 if permission is granted.
355 * Check permission before obtaining file attributes.
356 * @path contains the path structure for the file.
357 * Return 0 if permission is granted.
359 * Check permission before setting the extended attributes
360 * @value identified by @name for @dentry.
361 * Return 0 if permission is granted.
362 * @inode_post_setxattr:
363 * Update inode security field after successful setxattr operation.
364 * @value identified by @name for @dentry.
366 * Check permission before obtaining the extended attributes
367 * identified by @name for @dentry.
368 * Return 0 if permission is granted.
370 * Check permission before obtaining the list of extended attribute
372 * Return 0 if permission is granted.
373 * @inode_removexattr:
374 * Check permission before removing the extended attribute
375 * identified by @name for @dentry.
376 * Return 0 if permission is granted.
377 * @inode_getsecurity:
378 * Retrieve a copy of the extended attribute representation of the
379 * security label associated with @name for @inode via @buffer. Note that
380 * @name is the remainder of the attribute name after the security prefix
381 * has been removed. @alloc is used to specify of the call should return a
382 * value via the buffer or just the value length Return size of buffer on
384 * @inode_setsecurity:
385 * Set the security label associated with @name for @inode from the
386 * extended attribute value @value. @size indicates the size of the
387 * @value in bytes. @flags may be XATTR_CREATE, XATTR_REPLACE, or 0.
388 * Note that @name is the remainder of the attribute name after the
389 * security. prefix has been removed.
390 * Return 0 on success.
391 * @inode_listsecurity:
392 * Copy the extended attribute names for the security labels
393 * associated with @inode into @buffer. The maximum size of @buffer
394 * is specified by @buffer_size. @buffer may be NULL to request
395 * the size of the buffer required.
396 * Returns number of bytes used/required on success.
397 * @inode_need_killpriv:
398 * Called when an inode has been changed.
399 * @dentry is the dentry being changed.
400 * Return <0 on error to abort the inode change operation.
401 * Return 0 if inode_killpriv does not need to be called.
402 * Return >0 if inode_killpriv does need to be called.
404 * The setuid bit is being removed. Remove similar security labels.
405 * Called with the dentry->d_inode->i_mutex held.
406 * @dentry is the dentry being changed.
407 * Return 0 on success. If error is returned, then the operation
408 * causing setuid bit removal is failed.
410 * Get the secid associated with the node.
411 * @inode contains a pointer to the inode.
412 * @secid contains a pointer to the location where result will be saved.
413 * In case of failure, @secid will be set to zero.
415 * A file is about to be copied up from lower layer to upper layer of
416 * overlay filesystem. Security module can prepare a set of new creds
417 * and modify as need be and return new creds. Caller will switch to
418 * new creds temporarily to create new file and release newly allocated
420 * @src indicates the union dentry of file that is being copied up.
421 * @new pointer to pointer to return newly allocated creds.
422 * Returns 0 on success or a negative error code on error.
423 * @inode_copy_up_xattr:
424 * Filter the xattrs being copied up when a unioned file is copied
425 * up from a lower layer to the union/overlay layer.
426 * @name indicates the name of the xattr.
427 * Returns 0 to accept the xattr, 1 to discard the xattr, -EOPNOTSUPP if
428 * security module does not know about attribute or a negative error code
429 * to abort the copy up. Note that the caller is responsible for reading
430 * and writing the xattrs as this hook is merely a filter.
432 * Security hooks for file operations
435 * Check file permissions before accessing an open file. This hook is
436 * called by various operations that read or write files. A security
437 * module can use this hook to perform additional checking on these
438 * operations, e.g. to revalidate permissions on use to support privilege
439 * bracketing or policy changes. Notice that this hook is used when the
440 * actual read/write operations are performed, whereas the
441 * inode_security_ops hook is called when a file is opened (as well as
442 * many other operations).
443 * Caveat: Although this hook can be used to revalidate permissions for
444 * various system call operations that read or write files, it does not
445 * address the revalidation of permissions for memory-mapped files.
446 * Security modules must handle this separately if they need such
448 * @file contains the file structure being accessed.
449 * @mask contains the requested permissions.
450 * Return 0 if permission is granted.
451 * @file_alloc_security:
452 * Allocate and attach a security structure to the file->f_security field.
453 * The security field is initialized to NULL when the structure is first
455 * @file contains the file structure to secure.
456 * Return 0 if the hook is successful and permission is granted.
457 * @file_free_security:
458 * Deallocate and free any security structures stored in file->f_security.
459 * @file contains the file structure being modified.
461 * @file contains the file structure.
462 * @cmd contains the operation to perform.
463 * @arg contains the operational arguments.
464 * Check permission for an ioctl operation on @file. Note that @arg
465 * sometimes represents a user space pointer; in other cases, it may be a
466 * simple integer value. When @arg represents a user space pointer, it
467 * should never be used by the security module.
468 * Return 0 if permission is granted.
470 * Check permissions for a mmap operation at @addr.
471 * @addr contains virtual address that will be used for the operation.
472 * Return 0 if permission is granted.
474 * Check permissions for a mmap operation. The @file may be NULL, e.g.
475 * if mapping anonymous memory.
476 * @file contains the file structure for file to map (may be NULL).
477 * @reqprot contains the protection requested by the application.
478 * @prot contains the protection that will be applied by the kernel.
479 * @flags contains the operational flags.
480 * Return 0 if permission is granted.
482 * Check permissions before changing memory access permissions.
483 * @vma contains the memory region to modify.
484 * @reqprot contains the protection requested by the application.
485 * @prot contains the protection that will be applied by the kernel.
486 * Return 0 if permission is granted.
488 * Check permission before performing file locking operations.
489 * Note: this hook mediates both flock and fcntl style locks.
490 * @file contains the file structure.
491 * @cmd contains the posix-translated lock operation to perform
492 * (e.g. F_RDLCK, F_WRLCK).
493 * Return 0 if permission is granted.
495 * Check permission before allowing the file operation specified by @cmd
496 * from being performed on the file @file. Note that @arg sometimes
497 * represents a user space pointer; in other cases, it may be a simple
498 * integer value. When @arg represents a user space pointer, it should
499 * never be used by the security module.
500 * @file contains the file structure.
501 * @cmd contains the operation to be performed.
502 * @arg contains the operational arguments.
503 * Return 0 if permission is granted.
505 * Save owner security information (typically from current->security) in
506 * file->f_security for later use by the send_sigiotask hook.
507 * @file contains the file structure to update.
508 * Return 0 on success.
509 * @file_send_sigiotask:
510 * Check permission for the file owner @fown to send SIGIO or SIGURG to the
511 * process @tsk. Note that this hook is sometimes called from interrupt.
512 * Note that the fown_struct, @fown, is never outside the context of a
513 * struct file, so the file structure (and associated security information)
514 * can always be obtained: container_of(fown, struct file, f_owner)
515 * @tsk contains the structure of task receiving signal.
516 * @fown contains the file owner information.
517 * @sig is the signal that will be sent. When 0, kernel sends SIGIO.
518 * Return 0 if permission is granted.
520 * This hook allows security modules to control the ability of a process
521 * to receive an open file descriptor via socket IPC.
522 * @file contains the file structure being received.
523 * Return 0 if permission is granted.
525 * Save open-time permission checking state for later use upon
526 * file_permission, and recheck access if anything has changed
527 * since inode_permission.
529 * Security hooks for task operations.
532 * @task task being allocated.
533 * @clone_flags contains the flags indicating what should be shared.
534 * Handle allocation of task-related resources.
535 * Returns a zero on success, negative values on failure.
537 * @task task about to be freed.
538 * Handle release of task-related resources. (Note that this can be called
539 * from interrupt context.)
541 * @cred points to the credentials.
542 * @gfp indicates the atomicity of any memory allocations.
543 * Only allocate sufficient memory and attach to @cred such that
544 * cred_transfer() will not get ENOMEM.
546 * @cred points to the credentials.
547 * Deallocate and clear the cred->security field in a set of credentials.
549 * @new points to the new credentials.
550 * @old points to the original credentials.
551 * @gfp indicates the atomicity of any memory allocations.
552 * Prepare a new set of credentials by copying the data from the old set.
554 * @new points to the new credentials.
555 * @old points to the original credentials.
556 * Transfer data from original creds to new creds
558 * Set the credentials for a kernel service to act as (subjective context).
559 * @new points to the credentials to be modified.
560 * @secid specifies the security ID to be set
561 * The current task must be the one that nominated @secid.
562 * Return 0 if successful.
563 * @kernel_create_files_as:
564 * Set the file creation context in a set of credentials to be the same as
565 * the objective context of the specified inode.
566 * @new points to the credentials to be modified.
567 * @inode points to the inode to use as a reference.
568 * The current task must be the one that nominated @inode.
569 * Return 0 if successful.
570 * @kernel_module_request:
571 * Ability to trigger the kernel to automatically upcall to userspace for
572 * userspace to load a kernel module with the given name.
573 * @kmod_name name of the module requested by the kernel
574 * Return 0 if successful.
576 * Read a file specified by userspace.
577 * @file contains the file structure pointing to the file being read
579 * @id kernel read file identifier
580 * Return 0 if permission is granted.
581 * @kernel_post_read_file:
582 * Read a file specified by userspace.
583 * @file contains the file structure pointing to the file being read
585 * @buf pointer to buffer containing the file contents.
586 * @size length of the file contents.
587 * @id kernel read file identifier
588 * Return 0 if permission is granted.
590 * Update the module's state after setting one or more of the user
591 * identity attributes of the current process. The @flags parameter
592 * indicates which of the set*uid system calls invoked this hook. If
593 * @new is the set of credentials that will be installed. Modifications
594 * should be made to this rather than to @current->cred.
595 * @old is the set of credentials that are being replaces
596 * @flags contains one of the LSM_SETID_* values.
597 * Return 0 on success.
599 * Check permission before setting the process group identifier of the
600 * process @p to @pgid.
601 * @p contains the task_struct for process being modified.
602 * @pgid contains the new pgid.
603 * Return 0 if permission is granted.
605 * Check permission before getting the process group identifier of the
607 * @p contains the task_struct for the process.
608 * Return 0 if permission is granted.
610 * Check permission before getting the session identifier of the process
612 * @p contains the task_struct for the process.
613 * Return 0 if permission is granted.
615 * Retrieve the security identifier of the process @p.
616 * @p contains the task_struct for the process and place is into @secid.
617 * In case of failure, @secid will be set to zero.
620 * Check permission before setting the nice value of @p to @nice.
621 * @p contains the task_struct of process.
622 * @nice contains the new nice value.
623 * Return 0 if permission is granted.
625 * Check permission before setting the ioprio value of @p to @ioprio.
626 * @p contains the task_struct of process.
627 * @ioprio contains the new ioprio value
628 * Return 0 if permission is granted.
630 * Check permission before getting the ioprio value of @p.
631 * @p contains the task_struct of process.
632 * Return 0 if permission is granted.
634 * Check permission before getting and/or setting the resource limits of
636 * @cred points to the cred structure for the current task.
637 * @tcred points to the cred structure for the target task.
638 * @flags contains the LSM_PRLIMIT_* flag bits indicating whether the
639 * resource limits are being read, modified, or both.
640 * Return 0 if permission is granted.
642 * Check permission before setting the resource limits of process @p
643 * for @resource to @new_rlim. The old resource limit values can
644 * be examined by dereferencing (p->signal->rlim + resource).
645 * @p points to the task_struct for the target task's group leader.
646 * @resource contains the resource whose limit is being set.
647 * @new_rlim contains the new limits for @resource.
648 * Return 0 if permission is granted.
649 * @task_setscheduler:
650 * Check permission before setting scheduling policy and/or parameters of
651 * process @p based on @policy and @lp.
652 * @p contains the task_struct for process.
653 * @policy contains the scheduling policy.
654 * @lp contains the scheduling parameters.
655 * Return 0 if permission is granted.
656 * @task_getscheduler:
657 * Check permission before obtaining scheduling information for process
659 * @p contains the task_struct for process.
660 * Return 0 if permission is granted.
662 * Check permission before moving memory owned by process @p.
663 * @p contains the task_struct for process.
664 * Return 0 if permission is granted.
666 * Check permission before sending signal @sig to @p. @info can be NULL,
667 * the constant 1, or a pointer to a siginfo structure. If @info is 1 or
668 * SI_FROMKERNEL(info) is true, then the signal should be viewed as coming
669 * from the kernel and should typically be permitted.
670 * SIGIO signals are handled separately by the send_sigiotask hook in
672 * @p contains the task_struct for process.
673 * @info contains the signal information.
674 * @sig contains the signal value.
675 * @secid contains the sid of the process where the signal originated
676 * Return 0 if permission is granted.
678 * Check permission before performing a process control operation on the
680 * @option contains the operation.
681 * @arg2 contains a argument.
682 * @arg3 contains a argument.
683 * @arg4 contains a argument.
684 * @arg5 contains a argument.
685 * Return -ENOSYS if no-one wanted to handle this op, any other value to
686 * cause prctl() to return immediately with that value.
688 * Set the security attributes for an inode based on an associated task's
689 * security attributes, e.g. for /proc/pid inodes.
690 * @p contains the task_struct for the task.
691 * @inode contains the inode structure for the inode.
693 * Security hooks for Netlink messaging.
696 * Save security information for a netlink message so that permission
697 * checking can be performed when the message is processed. The security
698 * information can be saved using the eff_cap field of the
699 * netlink_skb_parms structure. Also may be used to provide fine
700 * grained control over message transmission.
701 * @sk associated sock of task sending the message.
702 * @skb contains the sk_buff structure for the netlink message.
703 * Return 0 if the information was successfully saved and message
704 * is allowed to be transmitted.
706 * Security hooks for Unix domain networking.
708 * @unix_stream_connect:
709 * Check permissions before establishing a Unix domain stream connection
710 * between @sock and @other.
711 * @sock contains the sock structure.
712 * @other contains the peer sock structure.
713 * @newsk contains the new sock structure.
714 * Return 0 if permission is granted.
716 * Check permissions before connecting or sending datagrams from @sock to
718 * @sock contains the socket structure.
719 * @other contains the peer socket structure.
720 * Return 0 if permission is granted.
722 * The @unix_stream_connect and @unix_may_send hooks were necessary because
723 * Linux provides an alternative to the conventional file name space for Unix
724 * domain sockets. Whereas binding and connecting to sockets in the file name
725 * space is mediated by the typical file permissions (and caught by the mknod
726 * and permission hooks in inode_security_ops), binding and connecting to
727 * sockets in the abstract name space is completely unmediated. Sufficient
728 * control of Unix domain sockets in the abstract name space isn't possible
729 * using only the socket layer hooks, since we need to know the actual target
730 * socket, which is not looked up until we are inside the af_unix code.
732 * Security hooks for socket operations.
735 * Check permissions prior to creating a new socket.
736 * @family contains the requested protocol family.
737 * @type contains the requested communications type.
738 * @protocol contains the requested protocol.
739 * @kern set to 1 if a kernel socket.
740 * Return 0 if permission is granted.
741 * @socket_post_create:
742 * This hook allows a module to update or allocate a per-socket security
743 * structure. Note that the security field was not added directly to the
744 * socket structure, but rather, the socket security information is stored
745 * in the associated inode. Typically, the inode alloc_security hook will
746 * allocate and and attach security information to
747 * sock->inode->i_security. This hook may be used to update the
748 * sock->inode->i_security field with additional information that wasn't
749 * available when the inode was allocated.
750 * @sock contains the newly created socket structure.
751 * @family contains the requested protocol family.
752 * @type contains the requested communications type.
753 * @protocol contains the requested protocol.
754 * @kern set to 1 if a kernel socket.
756 * Check permission before socket protocol layer bind operation is
757 * performed and the socket @sock is bound to the address specified in the
758 * @address parameter.
759 * @sock contains the socket structure.
760 * @address contains the address to bind to.
761 * @addrlen contains the length of address.
762 * Return 0 if permission is granted.
764 * Check permission before socket protocol layer connect operation
765 * attempts to connect socket @sock to a remote address, @address.
766 * @sock contains the socket structure.
767 * @address contains the address of remote endpoint.
768 * @addrlen contains the length of address.
769 * Return 0 if permission is granted.
771 * Check permission before socket protocol layer listen operation.
772 * @sock contains the socket structure.
773 * @backlog contains the maximum length for the pending connection queue.
774 * Return 0 if permission is granted.
776 * Check permission before accepting a new connection. Note that the new
777 * socket, @newsock, has been created and some information copied to it,
778 * but the accept operation has not actually been performed.
779 * @sock contains the listening socket structure.
780 * @newsock contains the newly created server socket for connection.
781 * Return 0 if permission is granted.
783 * Check permission before transmitting a message to another socket.
784 * @sock contains the socket structure.
785 * @msg contains the message to be transmitted.
786 * @size contains the size of message.
787 * Return 0 if permission is granted.
789 * Check permission before receiving a message from a socket.
790 * @sock contains the socket structure.
791 * @msg contains the message structure.
792 * @size contains the size of message structure.
793 * @flags contains the operational flags.
794 * Return 0 if permission is granted.
795 * @socket_getsockname:
796 * Check permission before the local address (name) of the socket object
797 * @sock is retrieved.
798 * @sock contains the socket structure.
799 * Return 0 if permission is granted.
800 * @socket_getpeername:
801 * Check permission before the remote address (name) of a socket object
802 * @sock is retrieved.
803 * @sock contains the socket structure.
804 * Return 0 if permission is granted.
805 * @socket_getsockopt:
806 * Check permissions before retrieving the options associated with socket
808 * @sock contains the socket structure.
809 * @level contains the protocol level to retrieve option from.
810 * @optname contains the name of option to retrieve.
811 * Return 0 if permission is granted.
812 * @socket_setsockopt:
813 * Check permissions before setting the options associated with socket
815 * @sock contains the socket structure.
816 * @level contains the protocol level to set options for.
817 * @optname contains the name of the option to set.
818 * Return 0 if permission is granted.
820 * Checks permission before all or part of a connection on the socket
821 * @sock is shut down.
822 * @sock contains the socket structure.
823 * @how contains the flag indicating how future sends and receives
825 * Return 0 if permission is granted.
826 * @socket_sock_rcv_skb:
827 * Check permissions on incoming network packets. This hook is distinct
828 * from Netfilter's IP input hooks since it is the first time that the
829 * incoming sk_buff @skb has been associated with a particular socket, @sk.
830 * Must not sleep inside this hook because some callers hold spinlocks.
831 * @sk contains the sock (not socket) associated with the incoming sk_buff.
832 * @skb contains the incoming network data.
833 * @socket_getpeersec_stream:
834 * This hook allows the security module to provide peer socket security
835 * state for unix or connected tcp sockets to userspace via getsockopt
836 * SO_GETPEERSEC. For tcp sockets this can be meaningful if the
837 * socket is associated with an ipsec SA.
838 * @sock is the local socket.
839 * @optval userspace memory where the security state is to be copied.
840 * @optlen userspace int where the module should copy the actual length
841 * of the security state.
842 * @len as input is the maximum length to copy to userspace provided
844 * Return 0 if all is well, otherwise, typical getsockopt return
846 * @socket_getpeersec_dgram:
847 * This hook allows the security module to provide peer socket security
848 * state for udp sockets on a per-packet basis to userspace via
849 * getsockopt SO_GETPEERSEC. The application must first have indicated
850 * the IP_PASSSEC option via getsockopt. It can then retrieve the
851 * security state returned by this hook for a packet via the SCM_SECURITY
852 * ancillary message type.
853 * @skb is the skbuff for the packet being queried
854 * @secdata is a pointer to a buffer in which to copy the security data
855 * @seclen is the maximum length for @secdata
856 * Return 0 on success, error on failure.
857 * @sk_alloc_security:
858 * Allocate and attach a security structure to the sk->sk_security field,
859 * which is used to copy security attributes between local stream sockets.
861 * Deallocate security structure.
862 * @sk_clone_security:
863 * Clone/copy security structure.
865 * Retrieve the LSM-specific secid for the sock to enable caching
866 * of network authorizations.
868 * Sets the socket's isec sid to the sock's sid.
869 * @inet_conn_request:
870 * Sets the openreq's sid to socket's sid with MLS portion taken
873 * Sets the new child socket's sid to the openreq sid.
874 * @inet_conn_established:
875 * Sets the connection's peersid to the secmark on skb.
876 * @secmark_relabel_packet:
877 * check if the process should be allowed to relabel packets to
879 * @security_secmark_refcount_inc
880 * tells the LSM to increment the number of secmark labeling rules loaded
881 * @security_secmark_refcount_dec
882 * tells the LSM to decrement the number of secmark labeling rules loaded
883 * @req_classify_flow:
884 * Sets the flow's sid to the openreq sid.
885 * @tun_dev_alloc_security:
886 * This hook allows a module to allocate a security structure for a TUN
888 * @security pointer to a security structure pointer.
889 * Returns a zero on success, negative values on failure.
890 * @tun_dev_free_security:
891 * This hook allows a module to free the security structure for a TUN
893 * @security pointer to the TUN device's security structure
895 * Check permissions prior to creating a new TUN device.
896 * @tun_dev_attach_queue:
897 * Check permissions prior to attaching to a TUN device queue.
898 * @security pointer to the TUN device's security structure.
900 * This hook can be used by the module to update any security state
901 * associated with the TUN device's sock structure.
902 * @sk contains the existing sock structure.
903 * @security pointer to the TUN device's security structure.
905 * This hook can be used by the module to update any security state
906 * associated with the TUN device's security structure.
907 * @security pointer to the TUN devices's security structure.
909 * Security hooks for Infiniband
912 * Check permission to access a pkey when modifing a QP.
913 * @subnet_prefix the subnet prefix of the port being used.
914 * @pkey the pkey to be accessed.
915 * @sec pointer to a security structure.
916 * @ib_endport_manage_subnet:
917 * Check permissions to send and receive SMPs on a end port.
918 * @dev_name the IB device name (i.e. mlx4_0).
919 * @port_num the port number.
920 * @sec pointer to a security structure.
921 * @ib_alloc_security:
922 * Allocate a security structure for Infiniband objects.
923 * @sec pointer to a security structure pointer.
924 * Returns 0 on success, non-zero on failure
926 * Deallocate an Infiniband security structure.
927 * @sec contains the security structure to be freed.
929 * Security hooks for XFRM operations.
931 * @xfrm_policy_alloc_security:
932 * @ctxp is a pointer to the xfrm_sec_ctx being added to Security Policy
933 * Database used by the XFRM system.
934 * @sec_ctx contains the security context information being provided by
935 * the user-level policy update program (e.g., setkey).
936 * Allocate a security structure to the xp->security field; the security
937 * field is initialized to NULL when the xfrm_policy is allocated.
938 * Return 0 if operation was successful (memory to allocate, legal context)
939 * @gfp is to specify the context for the allocation
940 * @xfrm_policy_clone_security:
941 * @old_ctx contains an existing xfrm_sec_ctx.
942 * @new_ctxp contains a new xfrm_sec_ctx being cloned from old.
943 * Allocate a security structure in new_ctxp that contains the
944 * information from the old_ctx structure.
945 * Return 0 if operation was successful (memory to allocate).
946 * @xfrm_policy_free_security:
947 * @ctx contains the xfrm_sec_ctx
948 * Deallocate xp->security.
949 * @xfrm_policy_delete_security:
950 * @ctx contains the xfrm_sec_ctx.
951 * Authorize deletion of xp->security.
953 * @x contains the xfrm_state being added to the Security Association
954 * Database by the XFRM system.
955 * @sec_ctx contains the security context information being provided by
956 * the user-level SA generation program (e.g., setkey or racoon).
957 * Allocate a security structure to the x->security field; the security
958 * field is initialized to NULL when the xfrm_state is allocated. Set the
959 * context to correspond to sec_ctx. Return 0 if operation was successful
960 * (memory to allocate, legal context).
961 * @xfrm_state_alloc_acquire:
962 * @x contains the xfrm_state being added to the Security Association
963 * Database by the XFRM system.
964 * @polsec contains the policy's security context.
965 * @secid contains the secid from which to take the mls portion of the
967 * Allocate a security structure to the x->security field; the security
968 * field is initialized to NULL when the xfrm_state is allocated. Set the
969 * context to correspond to secid. Return 0 if operation was successful
970 * (memory to allocate, legal context).
971 * @xfrm_state_free_security:
972 * @x contains the xfrm_state.
973 * Deallocate x->security.
974 * @xfrm_state_delete_security:
975 * @x contains the xfrm_state.
976 * Authorize deletion of x->security.
977 * @xfrm_policy_lookup:
978 * @ctx contains the xfrm_sec_ctx for which the access control is being
980 * @fl_secid contains the flow security label that is used to authorize
981 * access to the policy xp.
982 * @dir contains the direction of the flow (input or output).
983 * Check permission when a flow selects a xfrm_policy for processing
984 * XFRMs on a packet. The hook is called when selecting either a
985 * per-socket policy or a generic xfrm policy.
986 * Return 0 if permission is granted, -ESRCH otherwise, or -errno
988 * @xfrm_state_pol_flow_match:
989 * @x contains the state to match.
990 * @xp contains the policy to check for a match.
991 * @fl contains the flow to check for a match.
992 * Return 1 if there is a match.
993 * @xfrm_decode_session:
994 * @skb points to skb to decode.
995 * @secid points to the flow key secid to set.
996 * @ckall says if all xfrms used should be checked for same secid.
997 * Return 0 if ckall is zero or all xfrms used have the same secid.
999 * Security hooks affecting all Key Management operations
1002 * Permit allocation of a key and assign security data. Note that key does
1003 * not have a serial number assigned at this point.
1004 * @key points to the key.
1005 * @flags is the allocation flags
1006 * Return 0 if permission is granted, -ve error otherwise.
1008 * Notification of destruction; free security data.
1009 * @key points to the key.
1012 * See whether a specific operational right is granted to a process on a
1014 * @key_ref refers to the key (key pointer + possession attribute bit).
1015 * @cred points to the credentials to provide the context against which to
1016 * evaluate the security data on the key.
1017 * @perm describes the combination of permissions required of this key.
1018 * Return 0 if permission is granted, -ve error otherwise.
1020 * Get a textual representation of the security context attached to a key
1021 * for the purposes of honouring KEYCTL_GETSECURITY. This function
1022 * allocates the storage for the NUL-terminated string and the caller
1024 * @key points to the key to be queried.
1025 * @_buffer points to a pointer that should be set to point to the
1026 * resulting string (if no label or an error occurs).
1027 * Return the length of the string (including terminating NUL) or -ve if
1029 * May also return 0 (and a NULL buffer pointer) if there is no label.
1031 * Security hooks affecting all System V IPC operations.
1034 * Check permissions for access to IPC
1035 * @ipcp contains the kernel IPC permission structure
1036 * @flag contains the desired (requested) permission set
1037 * Return 0 if permission is granted.
1039 * Get the secid associated with the ipc object.
1040 * @ipcp contains the kernel IPC permission structure.
1041 * @secid contains a pointer to the location where result will be saved.
1042 * In case of failure, @secid will be set to zero.
1044 * Security hooks for individual messages held in System V IPC message queues
1045 * @msg_msg_alloc_security:
1046 * Allocate and attach a security structure to the msg->security field.
1047 * The security field is initialized to NULL when the structure is first
1049 * @msg contains the message structure to be modified.
1050 * Return 0 if operation was successful and permission is granted.
1051 * @msg_msg_free_security:
1052 * Deallocate the security structure for this message.
1053 * @msg contains the message structure to be modified.
1055 * Security hooks for System V IPC Message Queues
1057 * @msg_queue_alloc_security:
1058 * Allocate and attach a security structure to the
1059 * msq->q_perm.security field. The security field is initialized to
1060 * NULL when the structure is first created.
1061 * @msq contains the message queue structure to be modified.
1062 * Return 0 if operation was successful and permission is granted.
1063 * @msg_queue_free_security:
1064 * Deallocate security structure for this message queue.
1065 * @msq contains the message queue structure to be modified.
1066 * @msg_queue_associate:
1067 * Check permission when a message queue is requested through the
1068 * msgget system call. This hook is only called when returning the
1069 * message queue identifier for an existing message queue, not when a
1070 * new message queue is created.
1071 * @msq contains the message queue to act upon.
1072 * @msqflg contains the operation control flags.
1073 * Return 0 if permission is granted.
1074 * @msg_queue_msgctl:
1075 * Check permission when a message control operation specified by @cmd
1076 * is to be performed on the message queue @msq.
1077 * The @msq may be NULL, e.g. for IPC_INFO or MSG_INFO.
1078 * @msq contains the message queue to act upon. May be NULL.
1079 * @cmd contains the operation to be performed.
1080 * Return 0 if permission is granted.
1081 * @msg_queue_msgsnd:
1082 * Check permission before a message, @msg, is enqueued on the message
1084 * @msq contains the message queue to send message to.
1085 * @msg contains the message to be enqueued.
1086 * @msqflg contains operational flags.
1087 * Return 0 if permission is granted.
1088 * @msg_queue_msgrcv:
1089 * Check permission before a message, @msg, is removed from the message
1090 * queue, @msq. The @target task structure contains a pointer to the
1091 * process that will be receiving the message (not equal to the current
1092 * process when inline receives are being performed).
1093 * @msq contains the message queue to retrieve message from.
1094 * @msg contains the message destination.
1095 * @target contains the task structure for recipient process.
1096 * @type contains the type of message requested.
1097 * @mode contains the operational flags.
1098 * Return 0 if permission is granted.
1100 * Security hooks for System V Shared Memory Segments
1102 * @shm_alloc_security:
1103 * Allocate and attach a security structure to the shp->shm_perm.security
1104 * field. The security field is initialized to NULL when the structure is
1106 * @shp contains the shared memory structure to be modified.
1107 * Return 0 if operation was successful and permission is granted.
1108 * @shm_free_security:
1109 * Deallocate the security struct for this memory segment.
1110 * @shp contains the shared memory structure to be modified.
1112 * Check permission when a shared memory region is requested through the
1113 * shmget system call. This hook is only called when returning the shared
1114 * memory region identifier for an existing region, not when a new shared
1115 * memory region is created.
1116 * @shp contains the shared memory structure to be modified.
1117 * @shmflg contains the operation control flags.
1118 * Return 0 if permission is granted.
1120 * Check permission when a shared memory control operation specified by
1121 * @cmd is to be performed on the shared memory region @shp.
1122 * The @shp may be NULL, e.g. for IPC_INFO or SHM_INFO.
1123 * @shp contains shared memory structure to be modified.
1124 * @cmd contains the operation to be performed.
1125 * Return 0 if permission is granted.
1127 * Check permissions prior to allowing the shmat system call to attach the
1128 * shared memory segment @shp to the data segment of the calling process.
1129 * The attaching address is specified by @shmaddr.
1130 * @shp contains the shared memory structure to be modified.
1131 * @shmaddr contains the address to attach memory region to.
1132 * @shmflg contains the operational flags.
1133 * Return 0 if permission is granted.
1135 * Security hooks for System V Semaphores
1137 * @sem_alloc_security:
1138 * Allocate and attach a security structure to the sma->sem_perm.security
1139 * field. The security field is initialized to NULL when the structure is
1141 * @sma contains the semaphore structure
1142 * Return 0 if operation was successful and permission is granted.
1143 * @sem_free_security:
1144 * deallocate security struct for this semaphore
1145 * @sma contains the semaphore structure.
1147 * Check permission when a semaphore is requested through the semget
1148 * system call. This hook is only called when returning the semaphore
1149 * identifier for an existing semaphore, not when a new one must be
1151 * @sma contains the semaphore structure.
1152 * @semflg contains the operation control flags.
1153 * Return 0 if permission is granted.
1155 * Check permission when a semaphore operation specified by @cmd is to be
1156 * performed on the semaphore @sma. The @sma may be NULL, e.g. for
1157 * IPC_INFO or SEM_INFO.
1158 * @sma contains the semaphore structure. May be NULL.
1159 * @cmd contains the operation to be performed.
1160 * Return 0 if permission is granted.
1162 * Check permissions before performing operations on members of the
1163 * semaphore set @sma. If the @alter flag is nonzero, the semaphore set
1165 * @sma contains the semaphore structure.
1166 * @sops contains the operations to perform.
1167 * @nsops contains the number of operations to perform.
1168 * @alter contains the flag indicating whether changes are to be made.
1169 * Return 0 if permission is granted.
1171 * @binder_set_context_mgr:
1172 * Check whether @mgr is allowed to be the binder context manager.
1173 * @mgr contains the task_struct for the task being registered.
1174 * Return 0 if permission is granted.
1175 * @binder_transaction:
1176 * Check whether @from is allowed to invoke a binder transaction call
1178 * @from contains the task_struct for the sending task.
1179 * @to contains the task_struct for the receiving task.
1180 * @binder_transfer_binder:
1181 * Check whether @from is allowed to transfer a binder reference to @to.
1182 * @from contains the task_struct for the sending task.
1183 * @to contains the task_struct for the receiving task.
1184 * @binder_transfer_file:
1185 * Check whether @from is allowed to transfer @file to @to.
1186 * @from contains the task_struct for the sending task.
1187 * @file contains the struct file being transferred.
1188 * @to contains the task_struct for the receiving task.
1190 * @ptrace_access_check:
1191 * Check permission before allowing the current process to trace the
1193 * Security modules may also want to perform a process tracing check
1194 * during an execve in the set_security or apply_creds hooks of
1195 * tracing check during an execve in the bprm_set_creds hook of
1196 * binprm_security_ops if the process is being traced and its security
1197 * attributes would be changed by the execve.
1198 * @child contains the task_struct structure for the target process.
1199 * @mode contains the PTRACE_MODE flags indicating the form of access.
1200 * Return 0 if permission is granted.
1202 * Check that the @parent process has sufficient permission to trace the
1203 * current process before allowing the current process to present itself
1204 * to the @parent process for tracing.
1205 * @parent contains the task_struct structure for debugger process.
1206 * Return 0 if permission is granted.
1208 * Get the @effective, @inheritable, and @permitted capability sets for
1209 * the @target process. The hook may also perform permission checking to
1210 * determine if the current process is allowed to see the capability sets
1211 * of the @target process.
1212 * @target contains the task_struct structure for target process.
1213 * @effective contains the effective capability set.
1214 * @inheritable contains the inheritable capability set.
1215 * @permitted contains the permitted capability set.
1216 * Return 0 if the capability sets were successfully obtained.
1218 * Set the @effective, @inheritable, and @permitted capability sets for
1219 * the current process.
1220 * @new contains the new credentials structure for target process.
1221 * @old contains the current credentials structure for target process.
1222 * @effective contains the effective capability set.
1223 * @inheritable contains the inheritable capability set.
1224 * @permitted contains the permitted capability set.
1225 * Return 0 and update @new if permission is granted.
1227 * Check whether the @tsk process has the @cap capability in the indicated
1229 * @cred contains the credentials to use.
1230 * @ns contains the user namespace we want the capability in
1231 * @cap contains the capability <include/linux/capability.h>.
1232 * @audit contains whether to write an audit message or not
1233 * Return 0 if the capability is granted for @tsk.
1235 * Check permission before accessing the kernel message ring or changing
1236 * logging to the console.
1237 * See the syslog(2) manual page for an explanation of the @type values.
1238 * @type contains the type of action.
1239 * @from_file indicates the context of action (if it came from /proc).
1240 * Return 0 if permission is granted.
1242 * Check permission to change the system time.
1243 * struct timespec64 is defined in include/linux/time64.h and timezone
1244 * is defined in include/linux/time.h
1245 * @ts contains new time
1246 * @tz contains new timezone
1247 * Return 0 if permission is granted.
1248 * @vm_enough_memory:
1249 * Check permissions for allocating a new virtual mapping.
1250 * @mm contains the mm struct it is being added to.
1251 * @pages contains the number of pages.
1252 * Return 0 if permission is granted.
1255 * Check if the extended attribute specified by @name
1256 * represents a MAC label. Returns 1 if name is a MAC
1257 * attribute otherwise returns 0.
1258 * @name full extended attribute name to check against
1259 * LSM as a MAC label.
1262 * Convert secid to security context. If secdata is NULL the length of
1263 * the result will be returned in seclen, but no secdata will be returned.
1264 * This does mean that the length could change between calls to check the
1265 * length and the next call which actually allocates and returns the
1267 * @secid contains the security ID.
1268 * @secdata contains the pointer that stores the converted security
1270 * @seclen pointer which contains the length of the data
1272 * Convert security context to secid.
1273 * @secid contains the pointer to the generated security ID.
1274 * @secdata contains the security context.
1277 * Release the security context.
1278 * @secdata contains the security context.
1279 * @seclen contains the length of the security context.
1281 * Security hooks for Audit
1284 * Allocate and initialize an LSM audit rule structure.
1285 * @field contains the required Audit action.
1286 * Fields flags are defined in include/linux/audit.h
1287 * @op contains the operator the rule uses.
1288 * @rulestr contains the context where the rule will be applied to.
1289 * @lsmrule contains a pointer to receive the result.
1290 * Return 0 if @lsmrule has been successfully set,
1291 * -EINVAL in case of an invalid rule.
1293 * @audit_rule_known:
1294 * Specifies whether given @rule contains any fields related to
1296 * @rule contains the audit rule of interest.
1297 * Return 1 in case of relation found, 0 otherwise.
1299 * @audit_rule_match:
1300 * Determine if given @secid matches a rule previously approved
1301 * by @audit_rule_known.
1302 * @secid contains the security id in question.
1303 * @field contains the field which relates to current LSM.
1304 * @op contains the operator that will be used for matching.
1305 * @rule points to the audit rule that will be checked against.
1306 * @actx points to the audit context associated with the check.
1307 * Return 1 if secid matches the rule, 0 if it does not, -ERRNO on failure.
1310 * Deallocate the LSM audit rule structure previously allocated by
1312 * @rule contains the allocated rule
1314 * @inode_invalidate_secctx:
1315 * Notify the security module that it must revalidate the security context
1318 * @inode_notifysecctx:
1319 * Notify the security module of what the security context of an inode
1320 * should be. Initializes the incore security context managed by the
1321 * security module for this inode. Example usage: NFS client invokes
1322 * this hook to initialize the security context in its incore inode to the
1323 * value provided by the server for the file when the server returned the
1324 * file's attributes to the client.
1326 * Must be called with inode->i_mutex locked.
1328 * @inode we wish to set the security context of.
1329 * @ctx contains the string which we wish to set in the inode.
1330 * @ctxlen contains the length of @ctx.
1333 * Change the security context of an inode. Updates the
1334 * incore security context managed by the security module and invokes the
1335 * fs code as needed (via __vfs_setxattr_noperm) to update any backing
1336 * xattrs that represent the context. Example usage: NFS server invokes
1337 * this hook to change the security context in its incore inode and on the
1338 * backing filesystem to a value provided by the client on a SETATTR
1341 * Must be called with inode->i_mutex locked.
1343 * @dentry contains the inode we wish to set the security context of.
1344 * @ctx contains the string which we wish to set in the inode.
1345 * @ctxlen contains the length of @ctx.
1348 * On success, returns 0 and fills out @ctx and @ctxlen with the security
1349 * context for the given @inode.
1351 * @inode we wish to get the security context of.
1352 * @ctx is a pointer in which to place the allocated security context.
1353 * @ctxlen points to the place to put the length of @ctx.
1355 * Security hooks for using the eBPF maps and programs functionalities through
1359 * Do a initial check for all bpf syscalls after the attribute is copied
1360 * into the kernel. The actual security module can implement their own
1361 * rules to check the specific cmd they need.
1364 * Do a check when the kernel generate and return a file descriptor for
1367 * @map: bpf map that we want to access
1368 * @mask: the access flags
1371 * Do a check when the kernel generate and return a file descriptor for
1374 * @prog: bpf prog that userspace want to use.
1376 * @bpf_map_alloc_security:
1377 * Initialize the security field inside bpf map.
1379 * @bpf_map_free_security:
1380 * Clean up the security information stored inside bpf map.
1382 * @bpf_prog_alloc_security:
1383 * Initialize the security field inside bpf program.
1385 * @bpf_prog_free_security:
1386 * Clean up the security information stored inside bpf prog.
1389 union security_list_options {
1390 int (*binder_set_context_mgr)(struct task_struct *mgr);
1391 int (*binder_transaction)(struct task_struct *from,
1392 struct task_struct *to);
1393 int (*binder_transfer_binder)(struct task_struct *from,
1394 struct task_struct *to);
1395 int (*binder_transfer_file)(struct task_struct *from,
1396 struct task_struct *to,
1399 int (*ptrace_access_check)(struct task_struct *child,
1401 int (*ptrace_traceme)(struct task_struct *parent);
1402 int (*capget)(struct task_struct *target, kernel_cap_t *effective,
1403 kernel_cap_t *inheritable, kernel_cap_t *permitted);
1404 int (*capset)(struct cred *new, const struct cred *old,
1405 const kernel_cap_t *effective,
1406 const kernel_cap_t *inheritable,
1407 const kernel_cap_t *permitted);
1408 int (*capable)(const struct cred *cred, struct user_namespace *ns,
1409 int cap, int audit);
1410 int (*quotactl)(int cmds, int type, int id, struct super_block *sb);
1411 int (*quota_on)(struct dentry *dentry);
1412 int (*syslog)(int type);
1413 int (*settime)(const struct timespec64 *ts, const struct timezone *tz);
1414 int (*vm_enough_memory)(struct mm_struct *mm, long pages);
1416 int (*bprm_set_creds)(struct linux_binprm *bprm);
1417 int (*bprm_check_security)(struct linux_binprm *bprm);
1418 void (*bprm_committing_creds)(struct linux_binprm *bprm);
1419 void (*bprm_committed_creds)(struct linux_binprm *bprm);
1421 int (*sb_alloc_security)(struct super_block *sb);
1422 void (*sb_free_security)(struct super_block *sb);
1423 int (*sb_copy_data)(char *orig, char *copy);
1424 int (*sb_remount)(struct super_block *sb, void *data);
1425 int (*sb_kern_mount)(struct super_block *sb, int flags, void *data);
1426 int (*sb_show_options)(struct seq_file *m, struct super_block *sb);
1427 int (*sb_statfs)(struct dentry *dentry);
1428 int (*sb_mount)(const char *dev_name, const struct path *path,
1429 const char *type, unsigned long flags, void *data);
1430 int (*sb_umount)(struct vfsmount *mnt, int flags);
1431 int (*sb_pivotroot)(const struct path *old_path, const struct path *new_path);
1432 int (*sb_set_mnt_opts)(struct super_block *sb,
1433 struct security_mnt_opts *opts,
1434 unsigned long kern_flags,
1435 unsigned long *set_kern_flags);
1436 int (*sb_clone_mnt_opts)(const struct super_block *oldsb,
1437 struct super_block *newsb,
1438 unsigned long kern_flags,
1439 unsigned long *set_kern_flags);
1440 int (*sb_parse_opts_str)(char *options, struct security_mnt_opts *opts);
1441 int (*dentry_init_security)(struct dentry *dentry, int mode,
1442 const struct qstr *name, void **ctx,
1444 int (*dentry_create_files_as)(struct dentry *dentry, int mode,
1446 const struct cred *old,
1450 #ifdef CONFIG_SECURITY_PATH
1451 int (*path_unlink)(const struct path *dir, struct dentry *dentry);
1452 int (*path_mkdir)(const struct path *dir, struct dentry *dentry,
1454 int (*path_rmdir)(const struct path *dir, struct dentry *dentry);
1455 int (*path_mknod)(const struct path *dir, struct dentry *dentry,
1456 umode_t mode, unsigned int dev);
1457 int (*path_truncate)(const struct path *path);
1458 int (*path_symlink)(const struct path *dir, struct dentry *dentry,
1459 const char *old_name);
1460 int (*path_link)(struct dentry *old_dentry, const struct path *new_dir,
1461 struct dentry *new_dentry);
1462 int (*path_rename)(const struct path *old_dir, struct dentry *old_dentry,
1463 const struct path *new_dir,
1464 struct dentry *new_dentry);
1465 int (*path_chmod)(const struct path *path, umode_t mode);
1466 int (*path_chown)(const struct path *path, kuid_t uid, kgid_t gid);
1467 int (*path_chroot)(const struct path *path);
1470 int (*inode_alloc_security)(struct inode *inode);
1471 void (*inode_free_security)(struct inode *inode);
1472 int (*inode_init_security)(struct inode *inode, struct inode *dir,
1473 const struct qstr *qstr,
1474 const char **name, void **value,
1476 int (*inode_create)(struct inode *dir, struct dentry *dentry,
1478 int (*inode_link)(struct dentry *old_dentry, struct inode *dir,
1479 struct dentry *new_dentry);
1480 int (*inode_unlink)(struct inode *dir, struct dentry *dentry);
1481 int (*inode_symlink)(struct inode *dir, struct dentry *dentry,
1482 const char *old_name);
1483 int (*inode_mkdir)(struct inode *dir, struct dentry *dentry,
1485 int (*inode_rmdir)(struct inode *dir, struct dentry *dentry);
1486 int (*inode_mknod)(struct inode *dir, struct dentry *dentry,
1487 umode_t mode, dev_t dev);
1488 int (*inode_rename)(struct inode *old_dir, struct dentry *old_dentry,
1489 struct inode *new_dir,
1490 struct dentry *new_dentry);
1491 int (*inode_readlink)(struct dentry *dentry);
1492 int (*inode_follow_link)(struct dentry *dentry, struct inode *inode,
1494 int (*inode_permission)(struct inode *inode, int mask);
1495 int (*inode_setattr)(struct dentry *dentry, struct iattr *attr);
1496 int (*inode_getattr)(const struct path *path);
1497 int (*inode_setxattr)(struct dentry *dentry, const char *name,
1498 const void *value, size_t size, int flags);
1499 void (*inode_post_setxattr)(struct dentry *dentry, const char *name,
1500 const void *value, size_t size,
1502 int (*inode_getxattr)(struct dentry *dentry, const char *name);
1503 int (*inode_listxattr)(struct dentry *dentry);
1504 int (*inode_removexattr)(struct dentry *dentry, const char *name);
1505 int (*inode_need_killpriv)(struct dentry *dentry);
1506 int (*inode_killpriv)(struct dentry *dentry);
1507 int (*inode_getsecurity)(struct inode *inode, const char *name,
1508 void **buffer, bool alloc);
1509 int (*inode_setsecurity)(struct inode *inode, const char *name,
1510 const void *value, size_t size,
1512 int (*inode_listsecurity)(struct inode *inode, char *buffer,
1513 size_t buffer_size);
1514 void (*inode_getsecid)(struct inode *inode, u32 *secid);
1515 int (*inode_copy_up)(struct dentry *src, struct cred **new);
1516 int (*inode_copy_up_xattr)(const char *name);
1518 int (*file_permission)(struct file *file, int mask);
1519 int (*file_alloc_security)(struct file *file);
1520 void (*file_free_security)(struct file *file);
1521 int (*file_ioctl)(struct file *file, unsigned int cmd,
1523 int (*mmap_addr)(unsigned long addr);
1524 int (*mmap_file)(struct file *file, unsigned long reqprot,
1525 unsigned long prot, unsigned long flags);
1526 int (*file_mprotect)(struct vm_area_struct *vma, unsigned long reqprot,
1527 unsigned long prot);
1528 int (*file_lock)(struct file *file, unsigned int cmd);
1529 int (*file_fcntl)(struct file *file, unsigned int cmd,
1531 void (*file_set_fowner)(struct file *file);
1532 int (*file_send_sigiotask)(struct task_struct *tsk,
1533 struct fown_struct *fown, int sig);
1534 int (*file_receive)(struct file *file);
1535 int (*file_open)(struct file *file, const struct cred *cred);
1537 int (*task_alloc)(struct task_struct *task, unsigned long clone_flags);
1538 void (*task_free)(struct task_struct *task);
1539 int (*cred_alloc_blank)(struct cred *cred, gfp_t gfp);
1540 void (*cred_free)(struct cred *cred);
1541 int (*cred_prepare)(struct cred *new, const struct cred *old,
1543 void (*cred_transfer)(struct cred *new, const struct cred *old);
1544 int (*kernel_act_as)(struct cred *new, u32 secid);
1545 int (*kernel_create_files_as)(struct cred *new, struct inode *inode);
1546 int (*kernel_module_request)(char *kmod_name);
1547 int (*kernel_read_file)(struct file *file, enum kernel_read_file_id id);
1548 int (*kernel_post_read_file)(struct file *file, char *buf, loff_t size,
1549 enum kernel_read_file_id id);
1550 int (*task_fix_setuid)(struct cred *new, const struct cred *old,
1552 int (*task_setpgid)(struct task_struct *p, pid_t pgid);
1553 int (*task_getpgid)(struct task_struct *p);
1554 int (*task_getsid)(struct task_struct *p);
1555 void (*task_getsecid)(struct task_struct *p, u32 *secid);
1556 int (*task_setnice)(struct task_struct *p, int nice);
1557 int (*task_setioprio)(struct task_struct *p, int ioprio);
1558 int (*task_getioprio)(struct task_struct *p);
1559 int (*task_prlimit)(const struct cred *cred, const struct cred *tcred,
1560 unsigned int flags);
1561 int (*task_setrlimit)(struct task_struct *p, unsigned int resource,
1562 struct rlimit *new_rlim);
1563 int (*task_setscheduler)(struct task_struct *p);
1564 int (*task_getscheduler)(struct task_struct *p);
1565 int (*task_movememory)(struct task_struct *p);
1566 int (*task_kill)(struct task_struct *p, struct siginfo *info,
1567 int sig, u32 secid);
1568 int (*task_prctl)(int option, unsigned long arg2, unsigned long arg3,
1569 unsigned long arg4, unsigned long arg5);
1570 void (*task_to_inode)(struct task_struct *p, struct inode *inode);
1572 int (*ipc_permission)(struct kern_ipc_perm *ipcp, short flag);
1573 void (*ipc_getsecid)(struct kern_ipc_perm *ipcp, u32 *secid);
1575 int (*msg_msg_alloc_security)(struct msg_msg *msg);
1576 void (*msg_msg_free_security)(struct msg_msg *msg);
1578 int (*msg_queue_alloc_security)(struct msg_queue *msq);
1579 void (*msg_queue_free_security)(struct msg_queue *msq);
1580 int (*msg_queue_associate)(struct msg_queue *msq, int msqflg);
1581 int (*msg_queue_msgctl)(struct msg_queue *msq, int cmd);
1582 int (*msg_queue_msgsnd)(struct msg_queue *msq, struct msg_msg *msg,
1584 int (*msg_queue_msgrcv)(struct msg_queue *msq, struct msg_msg *msg,
1585 struct task_struct *target, long type,
1588 int (*shm_alloc_security)(struct shmid_kernel *shp);
1589 void (*shm_free_security)(struct shmid_kernel *shp);
1590 int (*shm_associate)(struct shmid_kernel *shp, int shmflg);
1591 int (*shm_shmctl)(struct shmid_kernel *shp, int cmd);
1592 int (*shm_shmat)(struct shmid_kernel *shp, char __user *shmaddr,
1595 int (*sem_alloc_security)(struct sem_array *sma);
1596 void (*sem_free_security)(struct sem_array *sma);
1597 int (*sem_associate)(struct sem_array *sma, int semflg);
1598 int (*sem_semctl)(struct sem_array *sma, int cmd);
1599 int (*sem_semop)(struct sem_array *sma, struct sembuf *sops,
1600 unsigned nsops, int alter);
1602 int (*netlink_send)(struct sock *sk, struct sk_buff *skb);
1604 void (*d_instantiate)(struct dentry *dentry, struct inode *inode);
1606 int (*getprocattr)(struct task_struct *p, char *name, char **value);
1607 int (*setprocattr)(const char *name, void *value, size_t size);
1608 int (*ismaclabel)(const char *name);
1609 int (*secid_to_secctx)(u32 secid, char **secdata, u32 *seclen);
1610 int (*secctx_to_secid)(const char *secdata, u32 seclen, u32 *secid);
1611 void (*release_secctx)(char *secdata, u32 seclen);
1613 void (*inode_invalidate_secctx)(struct inode *inode);
1614 int (*inode_notifysecctx)(struct inode *inode, void *ctx, u32 ctxlen);
1615 int (*inode_setsecctx)(struct dentry *dentry, void *ctx, u32 ctxlen);
1616 int (*inode_getsecctx)(struct inode *inode, void **ctx, u32 *ctxlen);
1618 #ifdef CONFIG_SECURITY_NETWORK
1619 int (*unix_stream_connect)(struct sock *sock, struct sock *other,
1620 struct sock *newsk);
1621 int (*unix_may_send)(struct socket *sock, struct socket *other);
1623 int (*socket_create)(int family, int type, int protocol, int kern);
1624 int (*socket_post_create)(struct socket *sock, int family, int type,
1625 int protocol, int kern);
1626 int (*socket_bind)(struct socket *sock, struct sockaddr *address,
1628 int (*socket_connect)(struct socket *sock, struct sockaddr *address,
1630 int (*socket_listen)(struct socket *sock, int backlog);
1631 int (*socket_accept)(struct socket *sock, struct socket *newsock);
1632 int (*socket_sendmsg)(struct socket *sock, struct msghdr *msg,
1634 int (*socket_recvmsg)(struct socket *sock, struct msghdr *msg,
1635 int size, int flags);
1636 int (*socket_getsockname)(struct socket *sock);
1637 int (*socket_getpeername)(struct socket *sock);
1638 int (*socket_getsockopt)(struct socket *sock, int level, int optname);
1639 int (*socket_setsockopt)(struct socket *sock, int level, int optname);
1640 int (*socket_shutdown)(struct socket *sock, int how);
1641 int (*socket_sock_rcv_skb)(struct sock *sk, struct sk_buff *skb);
1642 int (*socket_getpeersec_stream)(struct socket *sock,
1643 char __user *optval,
1644 int __user *optlen, unsigned len);
1645 int (*socket_getpeersec_dgram)(struct socket *sock,
1646 struct sk_buff *skb, u32 *secid);
1647 int (*sk_alloc_security)(struct sock *sk, int family, gfp_t priority);
1648 void (*sk_free_security)(struct sock *sk);
1649 void (*sk_clone_security)(const struct sock *sk, struct sock *newsk);
1650 void (*sk_getsecid)(struct sock *sk, u32 *secid);
1651 void (*sock_graft)(struct sock *sk, struct socket *parent);
1652 int (*inet_conn_request)(struct sock *sk, struct sk_buff *skb,
1653 struct request_sock *req);
1654 void (*inet_csk_clone)(struct sock *newsk,
1655 const struct request_sock *req);
1656 void (*inet_conn_established)(struct sock *sk, struct sk_buff *skb);
1657 int (*secmark_relabel_packet)(u32 secid);
1658 void (*secmark_refcount_inc)(void);
1659 void (*secmark_refcount_dec)(void);
1660 void (*req_classify_flow)(const struct request_sock *req,
1662 int (*tun_dev_alloc_security)(void **security);
1663 void (*tun_dev_free_security)(void *security);
1664 int (*tun_dev_create)(void);
1665 int (*tun_dev_attach_queue)(void *security);
1666 int (*tun_dev_attach)(struct sock *sk, void *security);
1667 int (*tun_dev_open)(void *security);
1668 #endif /* CONFIG_SECURITY_NETWORK */
1670 #ifdef CONFIG_SECURITY_INFINIBAND
1671 int (*ib_pkey_access)(void *sec, u64 subnet_prefix, u16 pkey);
1672 int (*ib_endport_manage_subnet)(void *sec, const char *dev_name,
1674 int (*ib_alloc_security)(void **sec);
1675 void (*ib_free_security)(void *sec);
1676 #endif /* CONFIG_SECURITY_INFINIBAND */
1678 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1679 int (*xfrm_policy_alloc_security)(struct xfrm_sec_ctx **ctxp,
1680 struct xfrm_user_sec_ctx *sec_ctx,
1682 int (*xfrm_policy_clone_security)(struct xfrm_sec_ctx *old_ctx,
1683 struct xfrm_sec_ctx **new_ctx);
1684 void (*xfrm_policy_free_security)(struct xfrm_sec_ctx *ctx);
1685 int (*xfrm_policy_delete_security)(struct xfrm_sec_ctx *ctx);
1686 int (*xfrm_state_alloc)(struct xfrm_state *x,
1687 struct xfrm_user_sec_ctx *sec_ctx);
1688 int (*xfrm_state_alloc_acquire)(struct xfrm_state *x,
1689 struct xfrm_sec_ctx *polsec,
1691 void (*xfrm_state_free_security)(struct xfrm_state *x);
1692 int (*xfrm_state_delete_security)(struct xfrm_state *x);
1693 int (*xfrm_policy_lookup)(struct xfrm_sec_ctx *ctx, u32 fl_secid,
1695 int (*xfrm_state_pol_flow_match)(struct xfrm_state *x,
1696 struct xfrm_policy *xp,
1697 const struct flowi *fl);
1698 int (*xfrm_decode_session)(struct sk_buff *skb, u32 *secid, int ckall);
1699 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
1701 /* key management security hooks */
1703 int (*key_alloc)(struct key *key, const struct cred *cred,
1704 unsigned long flags);
1705 void (*key_free)(struct key *key);
1706 int (*key_permission)(key_ref_t key_ref, const struct cred *cred,
1708 int (*key_getsecurity)(struct key *key, char **_buffer);
1709 #endif /* CONFIG_KEYS */
1712 int (*audit_rule_init)(u32 field, u32 op, char *rulestr,
1714 int (*audit_rule_known)(struct audit_krule *krule);
1715 int (*audit_rule_match)(u32 secid, u32 field, u32 op, void *lsmrule,
1716 struct audit_context *actx);
1717 void (*audit_rule_free)(void *lsmrule);
1718 #endif /* CONFIG_AUDIT */
1720 #ifdef CONFIG_BPF_SYSCALL
1721 int (*bpf)(int cmd, union bpf_attr *attr,
1723 int (*bpf_map)(struct bpf_map *map, fmode_t fmode);
1724 int (*bpf_prog)(struct bpf_prog *prog);
1725 int (*bpf_map_alloc_security)(struct bpf_map *map);
1726 void (*bpf_map_free_security)(struct bpf_map *map);
1727 int (*bpf_prog_alloc_security)(struct bpf_prog_aux *aux);
1728 void (*bpf_prog_free_security)(struct bpf_prog_aux *aux);
1729 #endif /* CONFIG_BPF_SYSCALL */
1732 struct security_hook_heads {
1733 struct list_head binder_set_context_mgr;
1734 struct list_head binder_transaction;
1735 struct list_head binder_transfer_binder;
1736 struct list_head binder_transfer_file;
1737 struct list_head ptrace_access_check;
1738 struct list_head ptrace_traceme;
1739 struct list_head capget;
1740 struct list_head capset;
1741 struct list_head capable;
1742 struct list_head quotactl;
1743 struct list_head quota_on;
1744 struct list_head syslog;
1745 struct list_head settime;
1746 struct list_head vm_enough_memory;
1747 struct list_head bprm_set_creds;
1748 struct list_head bprm_check_security;
1749 struct list_head bprm_committing_creds;
1750 struct list_head bprm_committed_creds;
1751 struct list_head sb_alloc_security;
1752 struct list_head sb_free_security;
1753 struct list_head sb_copy_data;
1754 struct list_head sb_remount;
1755 struct list_head sb_kern_mount;
1756 struct list_head sb_show_options;
1757 struct list_head sb_statfs;
1758 struct list_head sb_mount;
1759 struct list_head sb_umount;
1760 struct list_head sb_pivotroot;
1761 struct list_head sb_set_mnt_opts;
1762 struct list_head sb_clone_mnt_opts;
1763 struct list_head sb_parse_opts_str;
1764 struct list_head dentry_init_security;
1765 struct list_head dentry_create_files_as;
1766 #ifdef CONFIG_SECURITY_PATH
1767 struct list_head path_unlink;
1768 struct list_head path_mkdir;
1769 struct list_head path_rmdir;
1770 struct list_head path_mknod;
1771 struct list_head path_truncate;
1772 struct list_head path_symlink;
1773 struct list_head path_link;
1774 struct list_head path_rename;
1775 struct list_head path_chmod;
1776 struct list_head path_chown;
1777 struct list_head path_chroot;
1779 struct list_head inode_alloc_security;
1780 struct list_head inode_free_security;
1781 struct list_head inode_init_security;
1782 struct list_head inode_create;
1783 struct list_head inode_link;
1784 struct list_head inode_unlink;
1785 struct list_head inode_symlink;
1786 struct list_head inode_mkdir;
1787 struct list_head inode_rmdir;
1788 struct list_head inode_mknod;
1789 struct list_head inode_rename;
1790 struct list_head inode_readlink;
1791 struct list_head inode_follow_link;
1792 struct list_head inode_permission;
1793 struct list_head inode_setattr;
1794 struct list_head inode_getattr;
1795 struct list_head inode_setxattr;
1796 struct list_head inode_post_setxattr;
1797 struct list_head inode_getxattr;
1798 struct list_head inode_listxattr;
1799 struct list_head inode_removexattr;
1800 struct list_head inode_need_killpriv;
1801 struct list_head inode_killpriv;
1802 struct list_head inode_getsecurity;
1803 struct list_head inode_setsecurity;
1804 struct list_head inode_listsecurity;
1805 struct list_head inode_getsecid;
1806 struct list_head inode_copy_up;
1807 struct list_head inode_copy_up_xattr;
1808 struct list_head file_permission;
1809 struct list_head file_alloc_security;
1810 struct list_head file_free_security;
1811 struct list_head file_ioctl;
1812 struct list_head mmap_addr;
1813 struct list_head mmap_file;
1814 struct list_head file_mprotect;
1815 struct list_head file_lock;
1816 struct list_head file_fcntl;
1817 struct list_head file_set_fowner;
1818 struct list_head file_send_sigiotask;
1819 struct list_head file_receive;
1820 struct list_head file_open;
1821 struct list_head task_alloc;
1822 struct list_head task_free;
1823 struct list_head cred_alloc_blank;
1824 struct list_head cred_free;
1825 struct list_head cred_prepare;
1826 struct list_head cred_transfer;
1827 struct list_head kernel_act_as;
1828 struct list_head kernel_create_files_as;
1829 struct list_head kernel_read_file;
1830 struct list_head kernel_post_read_file;
1831 struct list_head kernel_module_request;
1832 struct list_head task_fix_setuid;
1833 struct list_head task_setpgid;
1834 struct list_head task_getpgid;
1835 struct list_head task_getsid;
1836 struct list_head task_getsecid;
1837 struct list_head task_setnice;
1838 struct list_head task_setioprio;
1839 struct list_head task_getioprio;
1840 struct list_head task_prlimit;
1841 struct list_head task_setrlimit;
1842 struct list_head task_setscheduler;
1843 struct list_head task_getscheduler;
1844 struct list_head task_movememory;
1845 struct list_head task_kill;
1846 struct list_head task_prctl;
1847 struct list_head task_to_inode;
1848 struct list_head ipc_permission;
1849 struct list_head ipc_getsecid;
1850 struct list_head msg_msg_alloc_security;
1851 struct list_head msg_msg_free_security;
1852 struct list_head msg_queue_alloc_security;
1853 struct list_head msg_queue_free_security;
1854 struct list_head msg_queue_associate;
1855 struct list_head msg_queue_msgctl;
1856 struct list_head msg_queue_msgsnd;
1857 struct list_head msg_queue_msgrcv;
1858 struct list_head shm_alloc_security;
1859 struct list_head shm_free_security;
1860 struct list_head shm_associate;
1861 struct list_head shm_shmctl;
1862 struct list_head shm_shmat;
1863 struct list_head sem_alloc_security;
1864 struct list_head sem_free_security;
1865 struct list_head sem_associate;
1866 struct list_head sem_semctl;
1867 struct list_head sem_semop;
1868 struct list_head netlink_send;
1869 struct list_head d_instantiate;
1870 struct list_head getprocattr;
1871 struct list_head setprocattr;
1872 struct list_head ismaclabel;
1873 struct list_head secid_to_secctx;
1874 struct list_head secctx_to_secid;
1875 struct list_head release_secctx;
1876 struct list_head inode_invalidate_secctx;
1877 struct list_head inode_notifysecctx;
1878 struct list_head inode_setsecctx;
1879 struct list_head inode_getsecctx;
1880 #ifdef CONFIG_SECURITY_NETWORK
1881 struct list_head unix_stream_connect;
1882 struct list_head unix_may_send;
1883 struct list_head socket_create;
1884 struct list_head socket_post_create;
1885 struct list_head socket_bind;
1886 struct list_head socket_connect;
1887 struct list_head socket_listen;
1888 struct list_head socket_accept;
1889 struct list_head socket_sendmsg;
1890 struct list_head socket_recvmsg;
1891 struct list_head socket_getsockname;
1892 struct list_head socket_getpeername;
1893 struct list_head socket_getsockopt;
1894 struct list_head socket_setsockopt;
1895 struct list_head socket_shutdown;
1896 struct list_head socket_sock_rcv_skb;
1897 struct list_head socket_getpeersec_stream;
1898 struct list_head socket_getpeersec_dgram;
1899 struct list_head sk_alloc_security;
1900 struct list_head sk_free_security;
1901 struct list_head sk_clone_security;
1902 struct list_head sk_getsecid;
1903 struct list_head sock_graft;
1904 struct list_head inet_conn_request;
1905 struct list_head inet_csk_clone;
1906 struct list_head inet_conn_established;
1907 struct list_head secmark_relabel_packet;
1908 struct list_head secmark_refcount_inc;
1909 struct list_head secmark_refcount_dec;
1910 struct list_head req_classify_flow;
1911 struct list_head tun_dev_alloc_security;
1912 struct list_head tun_dev_free_security;
1913 struct list_head tun_dev_create;
1914 struct list_head tun_dev_attach_queue;
1915 struct list_head tun_dev_attach;
1916 struct list_head tun_dev_open;
1917 #endif /* CONFIG_SECURITY_NETWORK */
1918 #ifdef CONFIG_SECURITY_INFINIBAND
1919 struct list_head ib_pkey_access;
1920 struct list_head ib_endport_manage_subnet;
1921 struct list_head ib_alloc_security;
1922 struct list_head ib_free_security;
1923 #endif /* CONFIG_SECURITY_INFINIBAND */
1924 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1925 struct list_head xfrm_policy_alloc_security;
1926 struct list_head xfrm_policy_clone_security;
1927 struct list_head xfrm_policy_free_security;
1928 struct list_head xfrm_policy_delete_security;
1929 struct list_head xfrm_state_alloc;
1930 struct list_head xfrm_state_alloc_acquire;
1931 struct list_head xfrm_state_free_security;
1932 struct list_head xfrm_state_delete_security;
1933 struct list_head xfrm_policy_lookup;
1934 struct list_head xfrm_state_pol_flow_match;
1935 struct list_head xfrm_decode_session;
1936 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
1938 struct list_head key_alloc;
1939 struct list_head key_free;
1940 struct list_head key_permission;
1941 struct list_head key_getsecurity;
1942 #endif /* CONFIG_KEYS */
1944 struct list_head audit_rule_init;
1945 struct list_head audit_rule_known;
1946 struct list_head audit_rule_match;
1947 struct list_head audit_rule_free;
1948 #endif /* CONFIG_AUDIT */
1949 #ifdef CONFIG_BPF_SYSCALL
1950 struct list_head bpf;
1951 struct list_head bpf_map;
1952 struct list_head bpf_prog;
1953 struct list_head bpf_map_alloc_security;
1954 struct list_head bpf_map_free_security;
1955 struct list_head bpf_prog_alloc_security;
1956 struct list_head bpf_prog_free_security;
1957 #endif /* CONFIG_BPF_SYSCALL */
1958 } __randomize_layout;
1961 * Security module hook list structure.
1962 * For use with generic list macros for common operations.
1964 struct security_hook_list {
1965 struct list_head list;
1966 struct list_head *head;
1967 union security_list_options hook;
1969 } __randomize_layout;
1972 * Initializing a security_hook_list structure takes
1973 * up a lot of space in a source file. This macro takes
1974 * care of the common case and reduces the amount of
1977 #define LSM_HOOK_INIT(HEAD, HOOK) \
1978 { .head = &security_hook_heads.HEAD, .hook = { .HEAD = HOOK } }
1980 extern struct security_hook_heads security_hook_heads;
1981 extern char *lsm_names;
1983 extern void security_add_hooks(struct security_hook_list *hooks, int count,
1986 #ifdef CONFIG_SECURITY_SELINUX_DISABLE
1988 * Assuring the safety of deleting a security module is up to
1989 * the security module involved. This may entail ordering the
1990 * module's hook list in a particular way, refusing to disable
1991 * the module once a policy is loaded or any number of other
1992 * actions better imagined than described.
1994 * The name of the configuration option reflects the only module
1995 * that currently uses the mechanism. Any developer who thinks
1996 * disabling their module is a good idea needs to be at least as
1997 * careful as the SELinux team.
1999 static inline void security_delete_hooks(struct security_hook_list *hooks,
2004 for (i = 0; i < count; i++)
2005 list_del_rcu(&hooks[i].list);
2007 #endif /* CONFIG_SECURITY_SELINUX_DISABLE */
2009 /* Currently required to handle SELinux runtime hook disable. */
2010 #ifdef CONFIG_SECURITY_WRITABLE_HOOKS
2011 #define __lsm_ro_after_init
2013 #define __lsm_ro_after_init __ro_after_init
2014 #endif /* CONFIG_SECURITY_WRITABLE_HOOKS */
2016 extern int __init security_module_enable(const char *module);
2017 extern void __init capability_add_hooks(void);
2018 #ifdef CONFIG_SECURITY_YAMA
2019 extern void __init yama_add_hooks(void);
2021 static inline void __init yama_add_hooks(void) { }
2023 #ifdef CONFIG_SECURITY_LOADPIN
2024 void __init loadpin_add_hooks(void);
2026 static inline void loadpin_add_hooks(void) { };
2029 #endif /* ! __LINUX_LSM_HOOKS_H */
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