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1 : : /*
2 : : * Linux Security Module interfaces
3 : : *
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
12 : : *
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.
17 : : *
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.
22 : : *
23 : : */
24 : :
25 : : #ifndef __LINUX_LSM_HOOKS_H
26 : : #define __LINUX_LSM_HOOKS_H
27 : :
28 : : #include <linux/security.h>
29 : : #include <linux/init.h>
30 : : #include <linux/rculist.h>
31 : :
32 : : /**
33 : : * union security_list_options - Linux Security Module hook function list
34 : : *
35 : : * Security hooks for program execution operations.
36 : : *
37 : : * @bprm_set_creds:
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().
78 : : *
79 : : * Security hooks for mount using fs_context.
80 : : * [See also Documentation/filesystems/mount_api.txt]
81 : : *
82 : : * @fs_context_dup:
83 : : * Allocate and attach a security structure to sc->security. This pointer
84 : : * is initialised to NULL by the caller.
85 : : * @fc indicates the new filesystem context.
86 : : * @src_fc indicates the original filesystem context.
87 : : * @fs_context_parse_param:
88 : : * Userspace provided a parameter to configure a superblock. The LSM may
89 : : * reject it with an error and may use it for itself, in which case it
90 : : * should return 0; otherwise it should return -ENOPARAM to pass it on to
91 : : * the filesystem.
92 : : * @fc indicates the filesystem context.
93 : : * @param The parameter
94 : : *
95 : : * Security hooks for filesystem operations.
96 : : *
97 : : * @sb_alloc_security:
98 : : * Allocate and attach a security structure to the sb->s_security field.
99 : : * The s_security field is initialized to NULL when the structure is
100 : : * allocated.
101 : : * @sb contains the super_block structure to be modified.
102 : : * Return 0 if operation was successful.
103 : : * @sb_free_security:
104 : : * Deallocate and clear the sb->s_security field.
105 : : * @sb contains the super_block structure to be modified.
106 : : * @sb_statfs:
107 : : * Check permission before obtaining filesystem statistics for the @mnt
108 : : * mountpoint.
109 : : * @dentry is a handle on the superblock for the filesystem.
110 : : * Return 0 if permission is granted.
111 : : * @sb_mount:
112 : : * Check permission before an object specified by @dev_name is mounted on
113 : : * the mount point named by @nd. For an ordinary mount, @dev_name
114 : : * identifies a device if the file system type requires a device. For a
115 : : * remount (@flags & MS_REMOUNT), @dev_name is irrelevant. For a
116 : : * loopback/bind mount (@flags & MS_BIND), @dev_name identifies the
117 : : * pathname of the object being mounted.
118 : : * @dev_name contains the name for object being mounted.
119 : : * @path contains the path for mount point object.
120 : : * @type contains the filesystem type.
121 : : * @flags contains the mount flags.
122 : : * @data contains the filesystem-specific data.
123 : : * Return 0 if permission is granted.
124 : : * @sb_copy_data:
125 : : * Allow mount option data to be copied prior to parsing by the filesystem,
126 : : * so that the security module can extract security-specific mount
127 : : * options cleanly (a filesystem may modify the data e.g. with strsep()).
128 : : * This also allows the original mount data to be stripped of security-
129 : : * specific options to avoid having to make filesystems aware of them.
130 : : * @orig the original mount data copied from userspace.
131 : : * @copy copied data which will be passed to the security module.
132 : : * Returns 0 if the copy was successful.
133 : : * @sb_remount:
134 : : * Extracts security system specific mount options and verifies no changes
135 : : * are being made to those options.
136 : : * @sb superblock being remounted
137 : : * @data contains the filesystem-specific data.
138 : : * Return 0 if permission is granted.
139 : : * @sb_umount:
140 : : * Check permission before the @mnt file system is unmounted.
141 : : * @mnt contains the mounted file system.
142 : : * @flags contains the unmount flags, e.g. MNT_FORCE.
143 : : * Return 0 if permission is granted.
144 : : * @sb_pivotroot:
145 : : * Check permission before pivoting the root filesystem.
146 : : * @old_path contains the path for the new location of the
147 : : * current root (put_old).
148 : : * @new_path contains the path for the new root (new_root).
149 : : * Return 0 if permission is granted.
150 : : * @sb_set_mnt_opts:
151 : : * Set the security relevant mount options used for a superblock
152 : : * @sb the superblock to set security mount options for
153 : : * @opts binary data structure containing all lsm mount data
154 : : * @sb_clone_mnt_opts:
155 : : * Copy all security options from a given superblock to another
156 : : * @oldsb old superblock which contain information to clone
157 : : * @newsb new superblock which needs filled in
158 : : * @sb_parse_opts_str:
159 : : * Parse a string of security data filling in the opts structure
160 : : * @options string containing all mount options known by the LSM
161 : : * @opts binary data structure usable by the LSM
162 : : * @move_mount:
163 : : * Check permission before a mount is moved.
164 : : * @from_path indicates the mount that is going to be moved.
165 : : * @to_path indicates the mountpoint that will be mounted upon.
166 : : * @dentry_init_security:
167 : : * Compute a context for a dentry as the inode is not yet available
168 : : * since NFSv4 has no label backed by an EA anyway.
169 : : * @dentry dentry to use in calculating the context.
170 : : * @mode mode used to determine resource type.
171 : : * @name name of the last path component used to create file
172 : : * @ctx pointer to place the pointer to the resulting context in.
173 : : * @ctxlen point to place the length of the resulting context.
174 : : * @dentry_create_files_as:
175 : : * Compute a context for a dentry as the inode is not yet available
176 : : * and set that context in passed in creds so that new files are
177 : : * created using that context. Context is calculated using the
178 : : * passed in creds and not the creds of the caller.
179 : : * @dentry dentry to use in calculating the context.
180 : : * @mode mode used to determine resource type.
181 : : * @name name of the last path component used to create file
182 : : * @old creds which should be used for context calculation
183 : : * @new creds to modify
184 : : *
185 : : *
186 : : * Security hooks for inode operations.
187 : : *
188 : : * @inode_alloc_security:
189 : : * Allocate and attach a security structure to @inode->i_security. The
190 : : * i_security field is initialized to NULL when the inode structure is
191 : : * allocated.
192 : : * @inode contains the inode structure.
193 : : * Return 0 if operation was successful.
194 : : * @inode_free_security:
195 : : * @inode contains the inode structure.
196 : : * Deallocate the inode security structure and set @inode->i_security to
197 : : * NULL.
198 : : * @inode_init_security:
199 : : * Obtain the security attribute name suffix and value to set on a newly
200 : : * created inode and set up the incore security field for the new inode.
201 : : * This hook is called by the fs code as part of the inode creation
202 : : * transaction and provides for atomic labeling of the inode, unlike
203 : : * the post_create/mkdir/... hooks called by the VFS. The hook function
204 : : * is expected to allocate the name and value via kmalloc, with the caller
205 : : * being responsible for calling kfree after using them.
206 : : * If the security module does not use security attributes or does
207 : : * not wish to put a security attribute on this particular inode,
208 : : * then it should return -EOPNOTSUPP to skip this processing.
209 : : * @inode contains the inode structure of the newly created inode.
210 : : * @dir contains the inode structure of the parent directory.
211 : : * @qstr contains the last path component of the new object
212 : : * @name will be set to the allocated name suffix (e.g. selinux).
213 : : * @value will be set to the allocated attribute value.
214 : : * @len will be set to the length of the value.
215 : : * Returns 0 if @name and @value have been successfully set,
216 : : * -EOPNOTSUPP if no security attribute is needed, or
217 : : * -ENOMEM on memory allocation failure.
218 : : * @inode_create:
219 : : * Check permission to create a regular file.
220 : : * @dir contains inode structure of the parent of the new file.
221 : : * @dentry contains the dentry structure for the file to be created.
222 : : * @mode contains the file mode of the file to be created.
223 : : * Return 0 if permission is granted.
224 : : * @inode_link:
225 : : * Check permission before creating a new hard link to a file.
226 : : * @old_dentry contains the dentry structure for an existing
227 : : * link to the file.
228 : : * @dir contains the inode structure of the parent directory
229 : : * of the new link.
230 : : * @new_dentry contains the dentry structure for the new link.
231 : : * Return 0 if permission is granted.
232 : : * @path_link:
233 : : * Check permission before creating a new hard link to a file.
234 : : * @old_dentry contains the dentry structure for an existing link
235 : : * to the file.
236 : : * @new_dir contains the path structure of the parent directory of
237 : : * the new link.
238 : : * @new_dentry contains the dentry structure for the new link.
239 : : * Return 0 if permission is granted.
240 : : * @inode_unlink:
241 : : * Check the permission to remove a hard link to a file.
242 : : * @dir contains the inode structure of parent directory of the file.
243 : : * @dentry contains the dentry structure for file to be unlinked.
244 : : * Return 0 if permission is granted.
245 : : * @path_unlink:
246 : : * Check the permission to remove a hard link to a file.
247 : : * @dir contains the path structure of parent directory of the file.
248 : : * @dentry contains the dentry structure for file to be unlinked.
249 : : * Return 0 if permission is granted.
250 : : * @inode_symlink:
251 : : * Check the permission to create a symbolic link to a file.
252 : : * @dir contains the inode structure of parent directory of
253 : : * the symbolic link.
254 : : * @dentry contains the dentry structure of the symbolic link.
255 : : * @old_name contains the pathname of file.
256 : : * Return 0 if permission is granted.
257 : : * @path_symlink:
258 : : * Check the permission to create a symbolic link to a file.
259 : : * @dir contains the path structure of parent directory of
260 : : * the symbolic link.
261 : : * @dentry contains the dentry structure of the symbolic link.
262 : : * @old_name contains the pathname of file.
263 : : * Return 0 if permission is granted.
264 : : * @inode_mkdir:
265 : : * Check permissions to create a new directory in the existing directory
266 : : * associated with inode structure @dir.
267 : : * @dir contains the inode structure of parent of the directory
268 : : * to be created.
269 : : * @dentry contains the dentry structure of new directory.
270 : : * @mode contains the mode of new directory.
271 : : * Return 0 if permission is granted.
272 : : * @path_mkdir:
273 : : * Check permissions to create a new directory in the existing directory
274 : : * associated with path structure @path.
275 : : * @dir contains the path structure of parent of the directory
276 : : * to be created.
277 : : * @dentry contains the dentry structure of new directory.
278 : : * @mode contains the mode of new directory.
279 : : * Return 0 if permission is granted.
280 : : * @inode_rmdir:
281 : : * Check the permission to remove a directory.
282 : : * @dir contains the inode structure of parent of the directory
283 : : * to be removed.
284 : : * @dentry contains the dentry structure of directory to be removed.
285 : : * Return 0 if permission is granted.
286 : : * @path_rmdir:
287 : : * Check the permission to remove a directory.
288 : : * @dir contains the path structure of parent of the directory to be
289 : : * removed.
290 : : * @dentry contains the dentry structure of directory to be removed.
291 : : * Return 0 if permission is granted.
292 : : * @inode_mknod:
293 : : * Check permissions when creating a special file (or a socket or a fifo
294 : : * file created via the mknod system call). Note that if mknod operation
295 : : * is being done for a regular file, then the create hook will be called
296 : : * and not this hook.
297 : : * @dir contains the inode structure of parent of the new file.
298 : : * @dentry contains the dentry structure of the new file.
299 : : * @mode contains the mode of the new file.
300 : : * @dev contains the device number.
301 : : * Return 0 if permission is granted.
302 : : * @path_mknod:
303 : : * Check permissions when creating a file. Note that this hook is called
304 : : * even if mknod operation is being done for a regular file.
305 : : * @dir contains the path structure of parent of the new file.
306 : : * @dentry contains the dentry structure of the new file.
307 : : * @mode contains the mode of the new file.
308 : : * @dev contains the undecoded device number. Use new_decode_dev() to get
309 : : * the decoded device number.
310 : : * Return 0 if permission is granted.
311 : : * @inode_rename:
312 : : * Check for permission to rename a file or directory.
313 : : * @old_dir contains the inode structure for parent of the old link.
314 : : * @old_dentry contains the dentry structure of the old link.
315 : : * @new_dir contains the inode structure for parent of the new link.
316 : : * @new_dentry contains the dentry structure of the new link.
317 : : * Return 0 if permission is granted.
318 : : * @path_rename:
319 : : * Check for permission to rename a file or directory.
320 : : * @old_dir contains the path structure for parent of the old link.
321 : : * @old_dentry contains the dentry structure of the old link.
322 : : * @new_dir contains the path structure for parent of the new link.
323 : : * @new_dentry contains the dentry structure of the new link.
324 : : * Return 0 if permission is granted.
325 : : * @path_chmod:
326 : : * Check for permission to change a mode of the file @path. The new
327 : : * mode is specified in @mode.
328 : : * @path contains the path structure of the file to change the mode.
329 : : * @mode contains the new DAC's permission, which is a bitmask of
330 : : * constants from <include/uapi/linux/stat.h>
331 : : * Return 0 if permission is granted.
332 : : * @path_chown:
333 : : * Check for permission to change owner/group of a file or directory.
334 : : * @path contains the path structure.
335 : : * @uid contains new owner's ID.
336 : : * @gid contains new group's ID.
337 : : * Return 0 if permission is granted.
338 : : * @path_chroot:
339 : : * Check for permission to change root directory.
340 : : * @path contains the path structure.
341 : : * Return 0 if permission is granted.
342 : : * @path_notify:
343 : : * Check permissions before setting a watch on events as defined by @mask,
344 : : * on an object at @path, whose type is defined by @obj_type.
345 : : * @inode_readlink:
346 : : * Check the permission to read the symbolic link.
347 : : * @dentry contains the dentry structure for the file link.
348 : : * Return 0 if permission is granted.
349 : : * @inode_follow_link:
350 : : * Check permission to follow a symbolic link when looking up a pathname.
351 : : * @dentry contains the dentry structure for the link.
352 : : * @inode contains the inode, which itself is not stable in RCU-walk
353 : : * @rcu indicates whether we are in RCU-walk mode.
354 : : * Return 0 if permission is granted.
355 : : * @inode_permission:
356 : : * Check permission before accessing an inode. This hook is called by the
357 : : * existing Linux permission function, so a security module can use it to
358 : : * provide additional checking for existing Linux permission checks.
359 : : * Notice that this hook is called when a file is opened (as well as many
360 : : * other operations), whereas the file_security_ops permission hook is
361 : : * called when the actual read/write operations are performed.
362 : : * @inode contains the inode structure to check.
363 : : * @mask contains the permission mask.
364 : : * Return 0 if permission is granted.
365 : : * @inode_setattr:
366 : : * Check permission before setting file attributes. Note that the kernel
367 : : * call to notify_change is performed from several locations, whenever
368 : : * file attributes change (such as when a file is truncated, chown/chmod
369 : : * operations, transferring disk quotas, etc).
370 : : * @dentry contains the dentry structure for the file.
371 : : * @attr is the iattr structure containing the new file attributes.
372 : : * Return 0 if permission is granted.
373 : : * @path_truncate:
374 : : * Check permission before truncating a file.
375 : : * @path contains the path structure for the file.
376 : : * Return 0 if permission is granted.
377 : : * @inode_getattr:
378 : : * Check permission before obtaining file attributes.
379 : : * @path contains the path structure for the file.
380 : : * Return 0 if permission is granted.
381 : : * @inode_setxattr:
382 : : * Check permission before setting the extended attributes
383 : : * @value identified by @name for @dentry.
384 : : * Return 0 if permission is granted.
385 : : * @inode_post_setxattr:
386 : : * Update inode security field after successful setxattr operation.
387 : : * @value identified by @name for @dentry.
388 : : * @inode_getxattr:
389 : : * Check permission before obtaining the extended attributes
390 : : * identified by @name for @dentry.
391 : : * Return 0 if permission is granted.
392 : : * @inode_listxattr:
393 : : * Check permission before obtaining the list of extended attribute
394 : : * names for @dentry.
395 : : * Return 0 if permission is granted.
396 : : * @inode_removexattr:
397 : : * Check permission before removing the extended attribute
398 : : * identified by @name for @dentry.
399 : : * Return 0 if permission is granted.
400 : : * @inode_getsecurity:
401 : : * Retrieve a copy of the extended attribute representation of the
402 : : * security label associated with @name for @inode via @buffer. Note that
403 : : * @name is the remainder of the attribute name after the security prefix
404 : : * has been removed. @alloc is used to specify of the call should return a
405 : : * value via the buffer or just the value length Return size of buffer on
406 : : * success.
407 : : * @inode_setsecurity:
408 : : * Set the security label associated with @name for @inode from the
409 : : * extended attribute value @value. @size indicates the size of the
410 : : * @value in bytes. @flags may be XATTR_CREATE, XATTR_REPLACE, or 0.
411 : : * Note that @name is the remainder of the attribute name after the
412 : : * security. prefix has been removed.
413 : : * Return 0 on success.
414 : : * @inode_listsecurity:
415 : : * Copy the extended attribute names for the security labels
416 : : * associated with @inode into @buffer. The maximum size of @buffer
417 : : * is specified by @buffer_size. @buffer may be NULL to request
418 : : * the size of the buffer required.
419 : : * Returns number of bytes used/required on success.
420 : : * @inode_need_killpriv:
421 : : * Called when an inode has been changed.
422 : : * @dentry is the dentry being changed.
423 : : * Return <0 on error to abort the inode change operation.
424 : : * Return 0 if inode_killpriv does not need to be called.
425 : : * Return >0 if inode_killpriv does need to be called.
426 : : * @inode_killpriv:
427 : : * The setuid bit is being removed. Remove similar security labels.
428 : : * Called with the dentry->d_inode->i_mutex held.
429 : : * @dentry is the dentry being changed.
430 : : * Return 0 on success. If error is returned, then the operation
431 : : * causing setuid bit removal is failed.
432 : : * @inode_getsecid:
433 : : * Get the secid associated with the node.
434 : : * @inode contains a pointer to the inode.
435 : : * @secid contains a pointer to the location where result will be saved.
436 : : * In case of failure, @secid will be set to zero.
437 : : * @inode_copy_up:
438 : : * A file is about to be copied up from lower layer to upper layer of
439 : : * overlay filesystem. Security module can prepare a set of new creds
440 : : * and modify as need be and return new creds. Caller will switch to
441 : : * new creds temporarily to create new file and release newly allocated
442 : : * creds.
443 : : * @src indicates the union dentry of file that is being copied up.
444 : : * @new pointer to pointer to return newly allocated creds.
445 : : * Returns 0 on success or a negative error code on error.
446 : : * @inode_copy_up_xattr:
447 : : * Filter the xattrs being copied up when a unioned file is copied
448 : : * up from a lower layer to the union/overlay layer.
449 : : * @name indicates the name of the xattr.
450 : : * Returns 0 to accept the xattr, 1 to discard the xattr, -EOPNOTSUPP if
451 : : * security module does not know about attribute or a negative error code
452 : : * to abort the copy up. Note that the caller is responsible for reading
453 : : * and writing the xattrs as this hook is merely a filter.
454 : : *
455 : : * Security hooks for kernfs node operations
456 : : *
457 : : * @kernfs_init_security:
458 : : * Initialize the security context of a newly created kernfs node based
459 : : * on its own and its parent's attributes.
460 : : *
461 : : * @kn_dir the parent kernfs node
462 : : * @kn the new child kernfs node
463 : : *
464 : : * Security hooks for file operations
465 : : *
466 : : * @file_permission:
467 : : * Check file permissions before accessing an open file. This hook is
468 : : * called by various operations that read or write files. A security
469 : : * module can use this hook to perform additional checking on these
470 : : * operations, e.g. to revalidate permissions on use to support privilege
471 : : * bracketing or policy changes. Notice that this hook is used when the
472 : : * actual read/write operations are performed, whereas the
473 : : * inode_security_ops hook is called when a file is opened (as well as
474 : : * many other operations).
475 : : * Caveat: Although this hook can be used to revalidate permissions for
476 : : * various system call operations that read or write files, it does not
477 : : * address the revalidation of permissions for memory-mapped files.
478 : : * Security modules must handle this separately if they need such
479 : : * revalidation.
480 : : * @file contains the file structure being accessed.
481 : : * @mask contains the requested permissions.
482 : : * Return 0 if permission is granted.
483 : : * @file_alloc_security:
484 : : * Allocate and attach a security structure to the file->f_security field.
485 : : * The security field is initialized to NULL when the structure is first
486 : : * created.
487 : : * @file contains the file structure to secure.
488 : : * Return 0 if the hook is successful and permission is granted.
489 : : * @file_free_security:
490 : : * Deallocate and free any security structures stored in file->f_security.
491 : : * @file contains the file structure being modified.
492 : : * @file_ioctl:
493 : : * @file contains the file structure.
494 : : * @cmd contains the operation to perform.
495 : : * @arg contains the operational arguments.
496 : : * Check permission for an ioctl operation on @file. Note that @arg
497 : : * sometimes represents a user space pointer; in other cases, it may be a
498 : : * simple integer value. When @arg represents a user space pointer, it
499 : : * should never be used by the security module.
500 : : * Return 0 if permission is granted.
501 : : * @mmap_addr :
502 : : * Check permissions for a mmap operation at @addr.
503 : : * @addr contains virtual address that will be used for the operation.
504 : : * Return 0 if permission is granted.
505 : : * @mmap_file :
506 : : * Check permissions for a mmap operation. The @file may be NULL, e.g.
507 : : * if mapping anonymous memory.
508 : : * @file contains the file structure for file to map (may be NULL).
509 : : * @reqprot contains the protection requested by the application.
510 : : * @prot contains the protection that will be applied by the kernel.
511 : : * @flags contains the operational flags.
512 : : * Return 0 if permission is granted.
513 : : * @file_mprotect:
514 : : * Check permissions before changing memory access permissions.
515 : : * @vma contains the memory region to modify.
516 : : * @reqprot contains the protection requested by the application.
517 : : * @prot contains the protection that will be applied by the kernel.
518 : : * Return 0 if permission is granted.
519 : : * @file_lock:
520 : : * Check permission before performing file locking operations.
521 : : * Note the hook mediates both flock and fcntl style locks.
522 : : * @file contains the file structure.
523 : : * @cmd contains the posix-translated lock operation to perform
524 : : * (e.g. F_RDLCK, F_WRLCK).
525 : : * Return 0 if permission is granted.
526 : : * @file_fcntl:
527 : : * Check permission before allowing the file operation specified by @cmd
528 : : * from being performed on the file @file. Note that @arg sometimes
529 : : * represents a user space pointer; in other cases, it may be a simple
530 : : * integer value. When @arg represents a user space pointer, it should
531 : : * never be used by the security module.
532 : : * @file contains the file structure.
533 : : * @cmd contains the operation to be performed.
534 : : * @arg contains the operational arguments.
535 : : * Return 0 if permission is granted.
536 : : * @file_set_fowner:
537 : : * Save owner security information (typically from current->security) in
538 : : * file->f_security for later use by the send_sigiotask hook.
539 : : * @file contains the file structure to update.
540 : : * Return 0 on success.
541 : : * @file_send_sigiotask:
542 : : * Check permission for the file owner @fown to send SIGIO or SIGURG to the
543 : : * process @tsk. Note that this hook is sometimes called from interrupt.
544 : : * Note that the fown_struct, @fown, is never outside the context of a
545 : : * struct file, so the file structure (and associated security information)
546 : : * can always be obtained: container_of(fown, struct file, f_owner)
547 : : * @tsk contains the structure of task receiving signal.
548 : : * @fown contains the file owner information.
549 : : * @sig is the signal that will be sent. When 0, kernel sends SIGIO.
550 : : * Return 0 if permission is granted.
551 : : * @file_receive:
552 : : * This hook allows security modules to control the ability of a process
553 : : * to receive an open file descriptor via socket IPC.
554 : : * @file contains the file structure being received.
555 : : * Return 0 if permission is granted.
556 : : * @file_open:
557 : : * Save open-time permission checking state for later use upon
558 : : * file_permission, and recheck access if anything has changed
559 : : * since inode_permission.
560 : : *
561 : : * Security hooks for task operations.
562 : : *
563 : : * @task_alloc:
564 : : * @task task being allocated.
565 : : * @clone_flags contains the flags indicating what should be shared.
566 : : * Handle allocation of task-related resources.
567 : : * Returns a zero on success, negative values on failure.
568 : : * @task_free:
569 : : * @task task about to be freed.
570 : : * Handle release of task-related resources. (Note that this can be called
571 : : * from interrupt context.)
572 : : * @cred_alloc_blank:
573 : : * @cred points to the credentials.
574 : : * @gfp indicates the atomicity of any memory allocations.
575 : : * Only allocate sufficient memory and attach to @cred such that
576 : : * cred_transfer() will not get ENOMEM.
577 : : * @cred_free:
578 : : * @cred points to the credentials.
579 : : * Deallocate and clear the cred->security field in a set of credentials.
580 : : * @cred_prepare:
581 : : * @new points to the new credentials.
582 : : * @old points to the original credentials.
583 : : * @gfp indicates the atomicity of any memory allocations.
584 : : * Prepare a new set of credentials by copying the data from the old set.
585 : : * @cred_transfer:
586 : : * @new points to the new credentials.
587 : : * @old points to the original credentials.
588 : : * Transfer data from original creds to new creds
589 : : * @cred_getsecid:
590 : : * Retrieve the security identifier of the cred structure @c
591 : : * @c contains the credentials, secid will be placed into @secid.
592 : : * In case of failure, @secid will be set to zero.
593 : : * @kernel_act_as:
594 : : * Set the credentials for a kernel service to act as (subjective context).
595 : : * @new points to the credentials to be modified.
596 : : * @secid specifies the security ID to be set
597 : : * The current task must be the one that nominated @secid.
598 : : * Return 0 if successful.
599 : : * @kernel_create_files_as:
600 : : * Set the file creation context in a set of credentials to be the same as
601 : : * the objective context of the specified inode.
602 : : * @new points to the credentials to be modified.
603 : : * @inode points to the inode to use as a reference.
604 : : * The current task must be the one that nominated @inode.
605 : : * Return 0 if successful.
606 : : * @kernel_module_request:
607 : : * Ability to trigger the kernel to automatically upcall to userspace for
608 : : * userspace to load a kernel module with the given name.
609 : : * @kmod_name name of the module requested by the kernel
610 : : * Return 0 if successful.
611 : : * @kernel_load_data:
612 : : * Load data provided by userspace.
613 : : * @id kernel load data identifier
614 : : * Return 0 if permission is granted.
615 : : * @kernel_read_file:
616 : : * Read a file specified by userspace.
617 : : * @file contains the file structure pointing to the file being read
618 : : * by the kernel.
619 : : * @id kernel read file identifier
620 : : * Return 0 if permission is granted.
621 : : * @kernel_post_read_file:
622 : : * Read a file specified by userspace.
623 : : * @file contains the file structure pointing to the file being read
624 : : * by the kernel.
625 : : * @buf pointer to buffer containing the file contents.
626 : : * @size length of the file contents.
627 : : * @id kernel read file identifier
628 : : * Return 0 if permission is granted.
629 : : * @task_fix_setuid:
630 : : * Update the module's state after setting one or more of the user
631 : : * identity attributes of the current process. The @flags parameter
632 : : * indicates which of the set*uid system calls invoked this hook. If
633 : : * @new is the set of credentials that will be installed. Modifications
634 : : * should be made to this rather than to @current->cred.
635 : : * @old is the set of credentials that are being replaces
636 : : * @flags contains one of the LSM_SETID_* values.
637 : : * Return 0 on success.
638 : : * @task_setpgid:
639 : : * Check permission before setting the process group identifier of the
640 : : * process @p to @pgid.
641 : : * @p contains the task_struct for process being modified.
642 : : * @pgid contains the new pgid.
643 : : * Return 0 if permission is granted.
644 : : * @task_getpgid:
645 : : * Check permission before getting the process group identifier of the
646 : : * process @p.
647 : : * @p contains the task_struct for the process.
648 : : * Return 0 if permission is granted.
649 : : * @task_getsid:
650 : : * Check permission before getting the session identifier of the process
651 : : * @p.
652 : : * @p contains the task_struct for the process.
653 : : * Return 0 if permission is granted.
654 : : * @task_getsecid:
655 : : * Retrieve the security identifier of the process @p.
656 : : * @p contains the task_struct for the process and place is into @secid.
657 : : * In case of failure, @secid will be set to zero.
658 : : *
659 : : * @task_setnice:
660 : : * Check permission before setting the nice value of @p to @nice.
661 : : * @p contains the task_struct of process.
662 : : * @nice contains the new nice value.
663 : : * Return 0 if permission is granted.
664 : : * @task_setioprio:
665 : : * Check permission before setting the ioprio value of @p to @ioprio.
666 : : * @p contains the task_struct of process.
667 : : * @ioprio contains the new ioprio value
668 : : * Return 0 if permission is granted.
669 : : * @task_getioprio:
670 : : * Check permission before getting the ioprio value of @p.
671 : : * @p contains the task_struct of process.
672 : : * Return 0 if permission is granted.
673 : : * @task_prlimit:
674 : : * Check permission before getting and/or setting the resource limits of
675 : : * another task.
676 : : * @cred points to the cred structure for the current task.
677 : : * @tcred points to the cred structure for the target task.
678 : : * @flags contains the LSM_PRLIMIT_* flag bits indicating whether the
679 : : * resource limits are being read, modified, or both.
680 : : * Return 0 if permission is granted.
681 : : * @task_setrlimit:
682 : : * Check permission before setting the resource limits of process @p
683 : : * for @resource to @new_rlim. The old resource limit values can
684 : : * be examined by dereferencing (p->signal->rlim + resource).
685 : : * @p points to the task_struct for the target task's group leader.
686 : : * @resource contains the resource whose limit is being set.
687 : : * @new_rlim contains the new limits for @resource.
688 : : * Return 0 if permission is granted.
689 : : * @task_setscheduler:
690 : : * Check permission before setting scheduling policy and/or parameters of
691 : : * process @p.
692 : : * @p contains the task_struct for process.
693 : : * Return 0 if permission is granted.
694 : : * @task_getscheduler:
695 : : * Check permission before obtaining scheduling information for process
696 : : * @p.
697 : : * @p contains the task_struct for process.
698 : : * Return 0 if permission is granted.
699 : : * @task_movememory:
700 : : * Check permission before moving memory owned by process @p.
701 : : * @p contains the task_struct for process.
702 : : * Return 0 if permission is granted.
703 : : * @task_kill:
704 : : * Check permission before sending signal @sig to @p. @info can be NULL,
705 : : * the constant 1, or a pointer to a kernel_siginfo structure. If @info is 1 or
706 : : * SI_FROMKERNEL(info) is true, then the signal should be viewed as coming
707 : : * from the kernel and should typically be permitted.
708 : : * SIGIO signals are handled separately by the send_sigiotask hook in
709 : : * file_security_ops.
710 : : * @p contains the task_struct for process.
711 : : * @info contains the signal information.
712 : : * @sig contains the signal value.
713 : : * @cred contains the cred of the process where the signal originated, or
714 : : * NULL if the current task is the originator.
715 : : * Return 0 if permission is granted.
716 : : * @task_prctl:
717 : : * Check permission before performing a process control operation on the
718 : : * current process.
719 : : * @option contains the operation.
720 : : * @arg2 contains a argument.
721 : : * @arg3 contains a argument.
722 : : * @arg4 contains a argument.
723 : : * @arg5 contains a argument.
724 : : * Return -ENOSYS if no-one wanted to handle this op, any other value to
725 : : * cause prctl() to return immediately with that value.
726 : : * @task_to_inode:
727 : : * Set the security attributes for an inode based on an associated task's
728 : : * security attributes, e.g. for /proc/pid inodes.
729 : : * @p contains the task_struct for the task.
730 : : * @inode contains the inode structure for the inode.
731 : : *
732 : : * Security hooks for Netlink messaging.
733 : : *
734 : : * @netlink_send:
735 : : * Save security information for a netlink message so that permission
736 : : * checking can be performed when the message is processed. The security
737 : : * information can be saved using the eff_cap field of the
738 : : * netlink_skb_parms structure. Also may be used to provide fine
739 : : * grained control over message transmission.
740 : : * @sk associated sock of task sending the message.
741 : : * @skb contains the sk_buff structure for the netlink message.
742 : : * Return 0 if the information was successfully saved and message
743 : : * is allowed to be transmitted.
744 : : *
745 : : * Security hooks for Unix domain networking.
746 : : *
747 : : * @unix_stream_connect:
748 : : * Check permissions before establishing a Unix domain stream connection
749 : : * between @sock and @other.
750 : : * @sock contains the sock structure.
751 : : * @other contains the peer sock structure.
752 : : * @newsk contains the new sock structure.
753 : : * Return 0 if permission is granted.
754 : : * @unix_may_send:
755 : : * Check permissions before connecting or sending datagrams from @sock to
756 : : * @other.
757 : : * @sock contains the socket structure.
758 : : * @other contains the peer socket structure.
759 : : * Return 0 if permission is granted.
760 : : *
761 : : * The @unix_stream_connect and @unix_may_send hooks were necessary because
762 : : * Linux provides an alternative to the conventional file name space for Unix
763 : : * domain sockets. Whereas binding and connecting to sockets in the file name
764 : : * space is mediated by the typical file permissions (and caught by the mknod
765 : : * and permission hooks in inode_security_ops), binding and connecting to
766 : : * sockets in the abstract name space is completely unmediated. Sufficient
767 : : * control of Unix domain sockets in the abstract name space isn't possible
768 : : * using only the socket layer hooks, since we need to know the actual target
769 : : * socket, which is not looked up until we are inside the af_unix code.
770 : : *
771 : : * Security hooks for socket operations.
772 : : *
773 : : * @socket_create:
774 : : * Check permissions prior to creating a new socket.
775 : : * @family contains the requested protocol family.
776 : : * @type contains the requested communications type.
777 : : * @protocol contains the requested protocol.
778 : : * @kern set to 1 if a kernel socket.
779 : : * Return 0 if permission is granted.
780 : : * @socket_post_create:
781 : : * This hook allows a module to update or allocate a per-socket security
782 : : * structure. Note that the security field was not added directly to the
783 : : * socket structure, but rather, the socket security information is stored
784 : : * in the associated inode. Typically, the inode alloc_security hook will
785 : : * allocate and and attach security information to
786 : : * SOCK_INODE(sock)->i_security. This hook may be used to update the
787 : : * SOCK_INODE(sock)->i_security field with additional information that
788 : : * wasn't available when the inode was allocated.
789 : : * @sock contains the newly created socket structure.
790 : : * @family contains the requested protocol family.
791 : : * @type contains the requested communications type.
792 : : * @protocol contains the requested protocol.
793 : : * @kern set to 1 if a kernel socket.
794 : : * @socket_socketpair:
795 : : * Check permissions before creating a fresh pair of sockets.
796 : : * @socka contains the first socket structure.
797 : : * @sockb contains the second socket structure.
798 : : * Return 0 if permission is granted and the connection was established.
799 : : * @socket_bind:
800 : : * Check permission before socket protocol layer bind operation is
801 : : * performed and the socket @sock is bound to the address specified in the
802 : : * @address parameter.
803 : : * @sock contains the socket structure.
804 : : * @address contains the address to bind to.
805 : : * @addrlen contains the length of address.
806 : : * Return 0 if permission is granted.
807 : : * @socket_connect:
808 : : * Check permission before socket protocol layer connect operation
809 : : * attempts to connect socket @sock to a remote address, @address.
810 : : * @sock contains the socket structure.
811 : : * @address contains the address of remote endpoint.
812 : : * @addrlen contains the length of address.
813 : : * Return 0 if permission is granted.
814 : : * @socket_listen:
815 : : * Check permission before socket protocol layer listen operation.
816 : : * @sock contains the socket structure.
817 : : * @backlog contains the maximum length for the pending connection queue.
818 : : * Return 0 if permission is granted.
819 : : * @socket_accept:
820 : : * Check permission before accepting a new connection. Note that the new
821 : : * socket, @newsock, has been created and some information copied to it,
822 : : * but the accept operation has not actually been performed.
823 : : * @sock contains the listening socket structure.
824 : : * @newsock contains the newly created server socket for connection.
825 : : * Return 0 if permission is granted.
826 : : * @socket_sendmsg:
827 : : * Check permission before transmitting a message to another socket.
828 : : * @sock contains the socket structure.
829 : : * @msg contains the message to be transmitted.
830 : : * @size contains the size of message.
831 : : * Return 0 if permission is granted.
832 : : * @socket_recvmsg:
833 : : * Check permission before receiving a message from a socket.
834 : : * @sock contains the socket structure.
835 : : * @msg contains the message structure.
836 : : * @size contains the size of message structure.
837 : : * @flags contains the operational flags.
838 : : * Return 0 if permission is granted.
839 : : * @socket_getsockname:
840 : : * Check permission before the local address (name) of the socket object
841 : : * @sock is retrieved.
842 : : * @sock contains the socket structure.
843 : : * Return 0 if permission is granted.
844 : : * @socket_getpeername:
845 : : * Check permission before the remote address (name) of a socket object
846 : : * @sock is retrieved.
847 : : * @sock contains the socket structure.
848 : : * Return 0 if permission is granted.
849 : : * @socket_getsockopt:
850 : : * Check permissions before retrieving the options associated with socket
851 : : * @sock.
852 : : * @sock contains the socket structure.
853 : : * @level contains the protocol level to retrieve option from.
854 : : * @optname contains the name of option to retrieve.
855 : : * Return 0 if permission is granted.
856 : : * @socket_setsockopt:
857 : : * Check permissions before setting the options associated with socket
858 : : * @sock.
859 : : * @sock contains the socket structure.
860 : : * @level contains the protocol level to set options for.
861 : : * @optname contains the name of the option to set.
862 : : * Return 0 if permission is granted.
863 : : * @socket_shutdown:
864 : : * Checks permission before all or part of a connection on the socket
865 : : * @sock is shut down.
866 : : * @sock contains the socket structure.
867 : : * @how contains the flag indicating how future sends and receives
868 : : * are handled.
869 : : * Return 0 if permission is granted.
870 : : * @socket_sock_rcv_skb:
871 : : * Check permissions on incoming network packets. This hook is distinct
872 : : * from Netfilter's IP input hooks since it is the first time that the
873 : : * incoming sk_buff @skb has been associated with a particular socket, @sk.
874 : : * Must not sleep inside this hook because some callers hold spinlocks.
875 : : * @sk contains the sock (not socket) associated with the incoming sk_buff.
876 : : * @skb contains the incoming network data.
877 : : * @socket_getpeersec_stream:
878 : : * This hook allows the security module to provide peer socket security
879 : : * state for unix or connected tcp sockets to userspace via getsockopt
880 : : * SO_GETPEERSEC. For tcp sockets this can be meaningful if the
881 : : * socket is associated with an ipsec SA.
882 : : * @sock is the local socket.
883 : : * @optval userspace memory where the security state is to be copied.
884 : : * @optlen userspace int where the module should copy the actual length
885 : : * of the security state.
886 : : * @len as input is the maximum length to copy to userspace provided
887 : : * by the caller.
888 : : * Return 0 if all is well, otherwise, typical getsockopt return
889 : : * values.
890 : : * @socket_getpeersec_dgram:
891 : : * This hook allows the security module to provide peer socket security
892 : : * state for udp sockets on a per-packet basis to userspace via
893 : : * getsockopt SO_GETPEERSEC. The application must first have indicated
894 : : * the IP_PASSSEC option via getsockopt. It can then retrieve the
895 : : * security state returned by this hook for a packet via the SCM_SECURITY
896 : : * ancillary message type.
897 : : * @sock contains the peer socket. May be NULL.
898 : : * @skb is the sk_buff for the packet being queried. May be NULL.
899 : : * @secid pointer to store the secid of the packet.
900 : : * Return 0 on success, error on failure.
901 : : * @sk_alloc_security:
902 : : * Allocate and attach a security structure to the sk->sk_security field,
903 : : * which is used to copy security attributes between local stream sockets.
904 : : * @sk_free_security:
905 : : * Deallocate security structure.
906 : : * @sk_clone_security:
907 : : * Clone/copy security structure.
908 : : * @sk_getsecid:
909 : : * Retrieve the LSM-specific secid for the sock to enable caching
910 : : * of network authorizations.
911 : : * @sock_graft:
912 : : * Sets the socket's isec sid to the sock's sid.
913 : : * @inet_conn_request:
914 : : * Sets the openreq's sid to socket's sid with MLS portion taken
915 : : * from peer sid.
916 : : * @inet_csk_clone:
917 : : * Sets the new child socket's sid to the openreq sid.
918 : : * @inet_conn_established:
919 : : * Sets the connection's peersid to the secmark on skb.
920 : : * @secmark_relabel_packet:
921 : : * check if the process should be allowed to relabel packets to
922 : : * the given secid
923 : : * @secmark_refcount_inc:
924 : : * tells the LSM to increment the number of secmark labeling rules loaded
925 : : * @secmark_refcount_dec:
926 : : * tells the LSM to decrement the number of secmark labeling rules loaded
927 : : * @req_classify_flow:
928 : : * Sets the flow's sid to the openreq sid.
929 : : * @tun_dev_alloc_security:
930 : : * This hook allows a module to allocate a security structure for a TUN
931 : : * device.
932 : : * @security pointer to a security structure pointer.
933 : : * Returns a zero on success, negative values on failure.
934 : : * @tun_dev_free_security:
935 : : * This hook allows a module to free the security structure for a TUN
936 : : * device.
937 : : * @security pointer to the TUN device's security structure
938 : : * @tun_dev_create:
939 : : * Check permissions prior to creating a new TUN device.
940 : : * @tun_dev_attach_queue:
941 : : * Check permissions prior to attaching to a TUN device queue.
942 : : * @security pointer to the TUN device's security structure.
943 : : * @tun_dev_attach:
944 : : * This hook can be used by the module to update any security state
945 : : * associated with the TUN device's sock structure.
946 : : * @sk contains the existing sock structure.
947 : : * @security pointer to the TUN device's security structure.
948 : : * @tun_dev_open:
949 : : * This hook can be used by the module to update any security state
950 : : * associated with the TUN device's security structure.
951 : : * @security pointer to the TUN devices's security structure.
952 : : *
953 : : * Security hooks for SCTP
954 : : *
955 : : * @sctp_assoc_request:
956 : : * Passes the @ep and @chunk->skb of the association INIT packet to
957 : : * the security module.
958 : : * @ep pointer to sctp endpoint structure.
959 : : * @skb pointer to skbuff of association packet.
960 : : * Return 0 on success, error on failure.
961 : : * @sctp_bind_connect:
962 : : * Validiate permissions required for each address associated with sock
963 : : * @sk. Depending on @optname, the addresses will be treated as either
964 : : * for a connect or bind service. The @addrlen is calculated on each
965 : : * ipv4 and ipv6 address using sizeof(struct sockaddr_in) or
966 : : * sizeof(struct sockaddr_in6).
967 : : * @sk pointer to sock structure.
968 : : * @optname name of the option to validate.
969 : : * @address list containing one or more ipv4/ipv6 addresses.
970 : : * @addrlen total length of address(s).
971 : : * Return 0 on success, error on failure.
972 : : * @sctp_sk_clone:
973 : : * Called whenever a new socket is created by accept(2) (i.e. a TCP
974 : : * style socket) or when a socket is 'peeled off' e.g userspace
975 : : * calls sctp_peeloff(3).
976 : : * @ep pointer to current sctp endpoint structure.
977 : : * @sk pointer to current sock structure.
978 : : * @sk pointer to new sock structure.
979 : : *
980 : : * Security hooks for Infiniband
981 : : *
982 : : * @ib_pkey_access:
983 : : * Check permission to access a pkey when modifing a QP.
984 : : * @subnet_prefix the subnet prefix of the port being used.
985 : : * @pkey the pkey to be accessed.
986 : : * @sec pointer to a security structure.
987 : : * @ib_endport_manage_subnet:
988 : : * Check permissions to send and receive SMPs on a end port.
989 : : * @dev_name the IB device name (i.e. mlx4_0).
990 : : * @port_num the port number.
991 : : * @sec pointer to a security structure.
992 : : * @ib_alloc_security:
993 : : * Allocate a security structure for Infiniband objects.
994 : : * @sec pointer to a security structure pointer.
995 : : * Returns 0 on success, non-zero on failure
996 : : * @ib_free_security:
997 : : * Deallocate an Infiniband security structure.
998 : : * @sec contains the security structure to be freed.
999 : : *
1000 : : * Security hooks for XFRM operations.
1001 : : *
1002 : : * @xfrm_policy_alloc_security:
1003 : : * @ctxp is a pointer to the xfrm_sec_ctx being added to Security Policy
1004 : : * Database used by the XFRM system.
1005 : : * @sec_ctx contains the security context information being provided by
1006 : : * the user-level policy update program (e.g., setkey).
1007 : : * Allocate a security structure to the xp->security field; the security
1008 : : * field is initialized to NULL when the xfrm_policy is allocated.
1009 : : * Return 0 if operation was successful (memory to allocate, legal context)
1010 : : * @gfp is to specify the context for the allocation
1011 : : * @xfrm_policy_clone_security:
1012 : : * @old_ctx contains an existing xfrm_sec_ctx.
1013 : : * @new_ctxp contains a new xfrm_sec_ctx being cloned from old.
1014 : : * Allocate a security structure in new_ctxp that contains the
1015 : : * information from the old_ctx structure.
1016 : : * Return 0 if operation was successful (memory to allocate).
1017 : : * @xfrm_policy_free_security:
1018 : : * @ctx contains the xfrm_sec_ctx
1019 : : * Deallocate xp->security.
1020 : : * @xfrm_policy_delete_security:
1021 : : * @ctx contains the xfrm_sec_ctx.
1022 : : * Authorize deletion of xp->security.
1023 : : * @xfrm_state_alloc:
1024 : : * @x contains the xfrm_state being added to the Security Association
1025 : : * Database by the XFRM system.
1026 : : * @sec_ctx contains the security context information being provided by
1027 : : * the user-level SA generation program (e.g., setkey or racoon).
1028 : : * Allocate a security structure to the x->security field; the security
1029 : : * field is initialized to NULL when the xfrm_state is allocated. Set the
1030 : : * context to correspond to sec_ctx. Return 0 if operation was successful
1031 : : * (memory to allocate, legal context).
1032 : : * @xfrm_state_alloc_acquire:
1033 : : * @x contains the xfrm_state being added to the Security Association
1034 : : * Database by the XFRM system.
1035 : : * @polsec contains the policy's security context.
1036 : : * @secid contains the secid from which to take the mls portion of the
1037 : : * context.
1038 : : * Allocate a security structure to the x->security field; the security
1039 : : * field is initialized to NULL when the xfrm_state is allocated. Set the
1040 : : * context to correspond to secid. Return 0 if operation was successful
1041 : : * (memory to allocate, legal context).
1042 : : * @xfrm_state_free_security:
1043 : : * @x contains the xfrm_state.
1044 : : * Deallocate x->security.
1045 : : * @xfrm_state_delete_security:
1046 : : * @x contains the xfrm_state.
1047 : : * Authorize deletion of x->security.
1048 : : * @xfrm_policy_lookup:
1049 : : * @ctx contains the xfrm_sec_ctx for which the access control is being
1050 : : * checked.
1051 : : * @fl_secid contains the flow security label that is used to authorize
1052 : : * access to the policy xp.
1053 : : * @dir contains the direction of the flow (input or output).
1054 : : * Check permission when a flow selects a xfrm_policy for processing
1055 : : * XFRMs on a packet. The hook is called when selecting either a
1056 : : * per-socket policy or a generic xfrm policy.
1057 : : * Return 0 if permission is granted, -ESRCH otherwise, or -errno
1058 : : * on other errors.
1059 : : * @xfrm_state_pol_flow_match:
1060 : : * @x contains the state to match.
1061 : : * @xp contains the policy to check for a match.
1062 : : * @fl contains the flow to check for a match.
1063 : : * Return 1 if there is a match.
1064 : : * @xfrm_decode_session:
1065 : : * @skb points to skb to decode.
1066 : : * @secid points to the flow key secid to set.
1067 : : * @ckall says if all xfrms used should be checked for same secid.
1068 : : * Return 0 if ckall is zero or all xfrms used have the same secid.
1069 : : *
1070 : : * Security hooks affecting all Key Management operations
1071 : : *
1072 : : * @key_alloc:
1073 : : * Permit allocation of a key and assign security data. Note that key does
1074 : : * not have a serial number assigned at this point.
1075 : : * @key points to the key.
1076 : : * @flags is the allocation flags
1077 : : * Return 0 if permission is granted, -ve error otherwise.
1078 : : * @key_free:
1079 : : * Notification of destruction; free security data.
1080 : : * @key points to the key.
1081 : : * No return value.
1082 : : * @key_permission:
1083 : : * See whether a specific operational right is granted to a process on a
1084 : : * key.
1085 : : * @key_ref refers to the key (key pointer + possession attribute bit).
1086 : : * @cred points to the credentials to provide the context against which to
1087 : : * evaluate the security data on the key.
1088 : : * @perm describes the combination of permissions required of this key.
1089 : : * Return 0 if permission is granted, -ve error otherwise.
1090 : : * @key_getsecurity:
1091 : : * Get a textual representation of the security context attached to a key
1092 : : * for the purposes of honouring KEYCTL_GETSECURITY. This function
1093 : : * allocates the storage for the NUL-terminated string and the caller
1094 : : * should free it.
1095 : : * @key points to the key to be queried.
1096 : : * @_buffer points to a pointer that should be set to point to the
1097 : : * resulting string (if no label or an error occurs).
1098 : : * Return the length of the string (including terminating NUL) or -ve if
1099 : : * an error.
1100 : : * May also return 0 (and a NULL buffer pointer) if there is no label.
1101 : : *
1102 : : * Security hooks affecting all System V IPC operations.
1103 : : *
1104 : : * @ipc_permission:
1105 : : * Check permissions for access to IPC
1106 : : * @ipcp contains the kernel IPC permission structure
1107 : : * @flag contains the desired (requested) permission set
1108 : : * Return 0 if permission is granted.
1109 : : * @ipc_getsecid:
1110 : : * Get the secid associated with the ipc object.
1111 : : * @ipcp contains the kernel IPC permission structure.
1112 : : * @secid contains a pointer to the location where result will be saved.
1113 : : * In case of failure, @secid will be set to zero.
1114 : : *
1115 : : * Security hooks for individual messages held in System V IPC message queues
1116 : : * @msg_msg_alloc_security:
1117 : : * Allocate and attach a security structure to the msg->security field.
1118 : : * The security field is initialized to NULL when the structure is first
1119 : : * created.
1120 : : * @msg contains the message structure to be modified.
1121 : : * Return 0 if operation was successful and permission is granted.
1122 : : * @msg_msg_free_security:
1123 : : * Deallocate the security structure for this message.
1124 : : * @msg contains the message structure to be modified.
1125 : : *
1126 : : * Security hooks for System V IPC Message Queues
1127 : : *
1128 : : * @msg_queue_alloc_security:
1129 : : * Allocate and attach a security structure to the
1130 : : * @perm->security field. The security field is initialized to
1131 : : * NULL when the structure is first created.
1132 : : * @perm contains the IPC permissions of the message queue.
1133 : : * Return 0 if operation was successful and permission is granted.
1134 : : * @msg_queue_free_security:
1135 : : * Deallocate security field @perm->security for the message queue.
1136 : : * @perm contains the IPC permissions of the message queue.
1137 : : * @msg_queue_associate:
1138 : : * Check permission when a message queue is requested through the
1139 : : * msgget system call. This hook is only called when returning the
1140 : : * message queue identifier for an existing message queue, not when a
1141 : : * new message queue is created.
1142 : : * @perm contains the IPC permissions of the message queue.
1143 : : * @msqflg contains the operation control flags.
1144 : : * Return 0 if permission is granted.
1145 : : * @msg_queue_msgctl:
1146 : : * Check permission when a message control operation specified by @cmd
1147 : : * is to be performed on the message queue with permissions @perm.
1148 : : * The @perm may be NULL, e.g. for IPC_INFO or MSG_INFO.
1149 : : * @perm contains the IPC permissions of the msg queue. May be NULL.
1150 : : * @cmd contains the operation to be performed.
1151 : : * Return 0 if permission is granted.
1152 : : * @msg_queue_msgsnd:
1153 : : * Check permission before a message, @msg, is enqueued on the message
1154 : : * queue with permissions @perm.
1155 : : * @perm contains the IPC permissions of the message queue.
1156 : : * @msg contains the message to be enqueued.
1157 : : * @msqflg contains operational flags.
1158 : : * Return 0 if permission is granted.
1159 : : * @msg_queue_msgrcv:
1160 : : * Check permission before a message, @msg, is removed from the message
1161 : : * queue. The @target task structure contains a pointer to the
1162 : : * process that will be receiving the message (not equal to the current
1163 : : * process when inline receives are being performed).
1164 : : * @perm contains the IPC permissions of the message queue.
1165 : : * @msg contains the message destination.
1166 : : * @target contains the task structure for recipient process.
1167 : : * @type contains the type of message requested.
1168 : : * @mode contains the operational flags.
1169 : : * Return 0 if permission is granted.
1170 : : *
1171 : : * Security hooks for System V Shared Memory Segments
1172 : : *
1173 : : * @shm_alloc_security:
1174 : : * Allocate and attach a security structure to the @perm->security
1175 : : * field. The security field is initialized to NULL when the structure is
1176 : : * first created.
1177 : : * @perm contains the IPC permissions of the shared memory structure.
1178 : : * Return 0 if operation was successful and permission is granted.
1179 : : * @shm_free_security:
1180 : : * Deallocate the security structure @perm->security for the memory segment.
1181 : : * @perm contains the IPC permissions of the shared memory structure.
1182 : : * @shm_associate:
1183 : : * Check permission when a shared memory region is requested through the
1184 : : * shmget system call. This hook is only called when returning the shared
1185 : : * memory region identifier for an existing region, not when a new shared
1186 : : * memory region is created.
1187 : : * @perm contains the IPC permissions of the shared memory structure.
1188 : : * @shmflg contains the operation control flags.
1189 : : * Return 0 if permission is granted.
1190 : : * @shm_shmctl:
1191 : : * Check permission when a shared memory control operation specified by
1192 : : * @cmd is to be performed on the shared memory region with permissions @perm.
1193 : : * The @perm may be NULL, e.g. for IPC_INFO or SHM_INFO.
1194 : : * @perm contains the IPC permissions of the shared memory structure.
1195 : : * @cmd contains the operation to be performed.
1196 : : * Return 0 if permission is granted.
1197 : : * @shm_shmat:
1198 : : * Check permissions prior to allowing the shmat system call to attach the
1199 : : * shared memory segment with permissions @perm to the data segment of the
1200 : : * calling process. The attaching address is specified by @shmaddr.
1201 : : * @perm contains the IPC permissions of the shared memory structure.
1202 : : * @shmaddr contains the address to attach memory region to.
1203 : : * @shmflg contains the operational flags.
1204 : : * Return 0 if permission is granted.
1205 : : *
1206 : : * Security hooks for System V Semaphores
1207 : : *
1208 : : * @sem_alloc_security:
1209 : : * Allocate and attach a security structure to the @perm->security
1210 : : * field. The security field is initialized to NULL when the structure is
1211 : : * first created.
1212 : : * @perm contains the IPC permissions of the semaphore.
1213 : : * Return 0 if operation was successful and permission is granted.
1214 : : * @sem_free_security:
1215 : : * Deallocate security structure @perm->security for the semaphore.
1216 : : * @perm contains the IPC permissions of the semaphore.
1217 : : * @sem_associate:
1218 : : * Check permission when a semaphore is requested through the semget
1219 : : * system call. This hook is only called when returning the semaphore
1220 : : * identifier for an existing semaphore, not when a new one must be
1221 : : * created.
1222 : : * @perm contains the IPC permissions of the semaphore.
1223 : : * @semflg contains the operation control flags.
1224 : : * Return 0 if permission is granted.
1225 : : * @sem_semctl:
1226 : : * Check permission when a semaphore operation specified by @cmd is to be
1227 : : * performed on the semaphore. The @perm may be NULL, e.g. for
1228 : : * IPC_INFO or SEM_INFO.
1229 : : * @perm contains the IPC permissions of the semaphore. May be NULL.
1230 : : * @cmd contains the operation to be performed.
1231 : : * Return 0 if permission is granted.
1232 : : * @sem_semop:
1233 : : * Check permissions before performing operations on members of the
1234 : : * semaphore set. If the @alter flag is nonzero, the semaphore set
1235 : : * may be modified.
1236 : : * @perm contains the IPC permissions of the semaphore.
1237 : : * @sops contains the operations to perform.
1238 : : * @nsops contains the number of operations to perform.
1239 : : * @alter contains the flag indicating whether changes are to be made.
1240 : : * Return 0 if permission is granted.
1241 : : *
1242 : : * @binder_set_context_mgr:
1243 : : * Check whether @mgr is allowed to be the binder context manager.
1244 : : * @mgr contains the task_struct for the task being registered.
1245 : : * Return 0 if permission is granted.
1246 : : * @binder_transaction:
1247 : : * Check whether @from is allowed to invoke a binder transaction call
1248 : : * to @to.
1249 : : * @from contains the task_struct for the sending task.
1250 : : * @to contains the task_struct for the receiving task.
1251 : : * @binder_transfer_binder:
1252 : : * Check whether @from is allowed to transfer a binder reference to @to.
1253 : : * @from contains the task_struct for the sending task.
1254 : : * @to contains the task_struct for the receiving task.
1255 : : * @binder_transfer_file:
1256 : : * Check whether @from is allowed to transfer @file to @to.
1257 : : * @from contains the task_struct for the sending task.
1258 : : * @file contains the struct file being transferred.
1259 : : * @to contains the task_struct for the receiving task.
1260 : : *
1261 : : * @ptrace_access_check:
1262 : : * Check permission before allowing the current process to trace the
1263 : : * @child process.
1264 : : * Security modules may also want to perform a process tracing check
1265 : : * during an execve in the set_security or apply_creds hooks of
1266 : : * tracing check during an execve in the bprm_set_creds hook of
1267 : : * binprm_security_ops if the process is being traced and its security
1268 : : * attributes would be changed by the execve.
1269 : : * @child contains the task_struct structure for the target process.
1270 : : * @mode contains the PTRACE_MODE flags indicating the form of access.
1271 : : * Return 0 if permission is granted.
1272 : : * @ptrace_traceme:
1273 : : * Check that the @parent process has sufficient permission to trace the
1274 : : * current process before allowing the current process to present itself
1275 : : * to the @parent process for tracing.
1276 : : * @parent contains the task_struct structure for debugger process.
1277 : : * Return 0 if permission is granted.
1278 : : * @capget:
1279 : : * Get the @effective, @inheritable, and @permitted capability sets for
1280 : : * the @target process. The hook may also perform permission checking to
1281 : : * determine if the current process is allowed to see the capability sets
1282 : : * of the @target process.
1283 : : * @target contains the task_struct structure for target process.
1284 : : * @effective contains the effective capability set.
1285 : : * @inheritable contains the inheritable capability set.
1286 : : * @permitted contains the permitted capability set.
1287 : : * Return 0 if the capability sets were successfully obtained.
1288 : : * @capset:
1289 : : * Set the @effective, @inheritable, and @permitted capability sets for
1290 : : * the current process.
1291 : : * @new contains the new credentials structure for target process.
1292 : : * @old contains the current credentials structure for target process.
1293 : : * @effective contains the effective capability set.
1294 : : * @inheritable contains the inheritable capability set.
1295 : : * @permitted contains the permitted capability set.
1296 : : * Return 0 and update @new if permission is granted.
1297 : : * @capable:
1298 : : * Check whether the @tsk process has the @cap capability in the indicated
1299 : : * credentials.
1300 : : * @cred contains the credentials to use.
1301 : : * @ns contains the user namespace we want the capability in
1302 : : * @cap contains the capability <include/linux/capability.h>.
1303 : : * @opts contains options for the capable check <include/linux/security.h>
1304 : : * Return 0 if the capability is granted for @tsk.
1305 : : * @syslog:
1306 : : * Check permission before accessing the kernel message ring or changing
1307 : : * logging to the console.
1308 : : * See the syslog(2) manual page for an explanation of the @type values.
1309 : : * @type contains the SYSLOG_ACTION_* constant from <include/linux/syslog.h>
1310 : : * Return 0 if permission is granted.
1311 : : * @settime:
1312 : : * Check permission to change the system time.
1313 : : * struct timespec64 is defined in <include/linux/time64.h> and timezone
1314 : : * is defined in <include/linux/time.h>
1315 : : * @ts contains new time
1316 : : * @tz contains new timezone
1317 : : * Return 0 if permission is granted.
1318 : : * @vm_enough_memory:
1319 : : * Check permissions for allocating a new virtual mapping.
1320 : : * @mm contains the mm struct it is being added to.
1321 : : * @pages contains the number of pages.
1322 : : * Return 0 if permission is granted.
1323 : : *
1324 : : * @ismaclabel:
1325 : : * Check if the extended attribute specified by @name
1326 : : * represents a MAC label. Returns 1 if name is a MAC
1327 : : * attribute otherwise returns 0.
1328 : : * @name full extended attribute name to check against
1329 : : * LSM as a MAC label.
1330 : : *
1331 : : * @secid_to_secctx:
1332 : : * Convert secid to security context. If secdata is NULL the length of
1333 : : * the result will be returned in seclen, but no secdata will be returned.
1334 : : * This does mean that the length could change between calls to check the
1335 : : * length and the next call which actually allocates and returns the
1336 : : * secdata.
1337 : : * @secid contains the security ID.
1338 : : * @secdata contains the pointer that stores the converted security
1339 : : * context.
1340 : : * @seclen pointer which contains the length of the data
1341 : : * @secctx_to_secid:
1342 : : * Convert security context to secid.
1343 : : * @secid contains the pointer to the generated security ID.
1344 : : * @secdata contains the security context.
1345 : : *
1346 : : * @release_secctx:
1347 : : * Release the security context.
1348 : : * @secdata contains the security context.
1349 : : * @seclen contains the length of the security context.
1350 : : *
1351 : : * Security hooks for Audit
1352 : : *
1353 : : * @audit_rule_init:
1354 : : * Allocate and initialize an LSM audit rule structure.
1355 : : * @field contains the required Audit action.
1356 : : * Fields flags are defined in <include/linux/audit.h>
1357 : : * @op contains the operator the rule uses.
1358 : : * @rulestr contains the context where the rule will be applied to.
1359 : : * @lsmrule contains a pointer to receive the result.
1360 : : * Return 0 if @lsmrule has been successfully set,
1361 : : * -EINVAL in case of an invalid rule.
1362 : : *
1363 : : * @audit_rule_known:
1364 : : * Specifies whether given @krule contains any fields related to
1365 : : * current LSM.
1366 : : * @krule contains the audit rule of interest.
1367 : : * Return 1 in case of relation found, 0 otherwise.
1368 : : *
1369 : : * @audit_rule_match:
1370 : : * Determine if given @secid matches a rule previously approved
1371 : : * by @audit_rule_known.
1372 : : * @secid contains the security id in question.
1373 : : * @field contains the field which relates to current LSM.
1374 : : * @op contains the operator that will be used for matching.
1375 : : * @lrule points to the audit rule that will be checked against.
1376 : : * Return 1 if secid matches the rule, 0 if it does not, -ERRNO on failure.
1377 : : *
1378 : : * @audit_rule_free:
1379 : : * Deallocate the LSM audit rule structure previously allocated by
1380 : : * audit_rule_init.
1381 : : * @lsmrule contains the allocated rule
1382 : : *
1383 : : * @inode_invalidate_secctx:
1384 : : * Notify the security module that it must revalidate the security context
1385 : : * of an inode.
1386 : : *
1387 : : * @inode_notifysecctx:
1388 : : * Notify the security module of what the security context of an inode
1389 : : * should be. Initializes the incore security context managed by the
1390 : : * security module for this inode. Example usage: NFS client invokes
1391 : : * this hook to initialize the security context in its incore inode to the
1392 : : * value provided by the server for the file when the server returned the
1393 : : * file's attributes to the client.
1394 : : * Must be called with inode->i_mutex locked.
1395 : : * @inode we wish to set the security context of.
1396 : : * @ctx contains the string which we wish to set in the inode.
1397 : : * @ctxlen contains the length of @ctx.
1398 : : *
1399 : : * @inode_setsecctx:
1400 : : * Change the security context of an inode. Updates the
1401 : : * incore security context managed by the security module and invokes the
1402 : : * fs code as needed (via __vfs_setxattr_noperm) to update any backing
1403 : : * xattrs that represent the context. Example usage: NFS server invokes
1404 : : * this hook to change the security context in its incore inode and on the
1405 : : * backing filesystem to a value provided by the client on a SETATTR
1406 : : * operation.
1407 : : * Must be called with inode->i_mutex locked.
1408 : : * @dentry contains the inode we wish to set the security context of.
1409 : : * @ctx contains the string which we wish to set in the inode.
1410 : : * @ctxlen contains the length of @ctx.
1411 : : *
1412 : : * @inode_getsecctx:
1413 : : * On success, returns 0 and fills out @ctx and @ctxlen with the security
1414 : : * context for the given @inode.
1415 : : * @inode we wish to get the security context of.
1416 : : * @ctx is a pointer in which to place the allocated security context.
1417 : : * @ctxlen points to the place to put the length of @ctx.
1418 : : *
1419 : : * Security hooks for using the eBPF maps and programs functionalities through
1420 : : * eBPF syscalls.
1421 : : *
1422 : : * @bpf:
1423 : : * Do a initial check for all bpf syscalls after the attribute is copied
1424 : : * into the kernel. The actual security module can implement their own
1425 : : * rules to check the specific cmd they need.
1426 : : *
1427 : : * @bpf_map:
1428 : : * Do a check when the kernel generate and return a file descriptor for
1429 : : * eBPF maps.
1430 : : *
1431 : : * @map: bpf map that we want to access
1432 : : * @mask: the access flags
1433 : : *
1434 : : * @bpf_prog:
1435 : : * Do a check when the kernel generate and return a file descriptor for
1436 : : * eBPF programs.
1437 : : *
1438 : : * @prog: bpf prog that userspace want to use.
1439 : : *
1440 : : * @bpf_map_alloc_security:
1441 : : * Initialize the security field inside bpf map.
1442 : : *
1443 : : * @bpf_map_free_security:
1444 : : * Clean up the security information stored inside bpf map.
1445 : : *
1446 : : * @bpf_prog_alloc_security:
1447 : : * Initialize the security field inside bpf program.
1448 : : *
1449 : : * @bpf_prog_free_security:
1450 : : * Clean up the security information stored inside bpf prog.
1451 : : *
1452 : : * @locked_down
1453 : : * Determine whether a kernel feature that potentially enables arbitrary
1454 : : * code execution in kernel space should be permitted.
1455 : : *
1456 : : * @what: kernel feature being accessed
1457 : : */
1458 : : union security_list_options {
1459 : : int (*binder_set_context_mgr)(struct task_struct *mgr);
1460 : : int (*binder_transaction)(struct task_struct *from,
1461 : : struct task_struct *to);
1462 : : int (*binder_transfer_binder)(struct task_struct *from,
1463 : : struct task_struct *to);
1464 : : int (*binder_transfer_file)(struct task_struct *from,
1465 : : struct task_struct *to,
1466 : : struct file *file);
1467 : :
1468 : : int (*ptrace_access_check)(struct task_struct *child,
1469 : : unsigned int mode);
1470 : : int (*ptrace_traceme)(struct task_struct *parent);
1471 : : int (*capget)(struct task_struct *target, kernel_cap_t *effective,
1472 : : kernel_cap_t *inheritable, kernel_cap_t *permitted);
1473 : : int (*capset)(struct cred *new, const struct cred *old,
1474 : : const kernel_cap_t *effective,
1475 : : const kernel_cap_t *inheritable,
1476 : : const kernel_cap_t *permitted);
1477 : : int (*capable)(const struct cred *cred,
1478 : : struct user_namespace *ns,
1479 : : int cap,
1480 : : unsigned int opts);
1481 : : int (*quotactl)(int cmds, int type, int id, struct super_block *sb);
1482 : : int (*quota_on)(struct dentry *dentry);
1483 : : int (*syslog)(int type);
1484 : : int (*settime)(const struct timespec64 *ts, const struct timezone *tz);
1485 : : int (*vm_enough_memory)(struct mm_struct *mm, long pages);
1486 : :
1487 : : int (*bprm_set_creds)(struct linux_binprm *bprm);
1488 : : int (*bprm_check_security)(struct linux_binprm *bprm);
1489 : : void (*bprm_committing_creds)(struct linux_binprm *bprm);
1490 : : void (*bprm_committed_creds)(struct linux_binprm *bprm);
1491 : :
1492 : : int (*fs_context_dup)(struct fs_context *fc, struct fs_context *src_sc);
1493 : : int (*fs_context_parse_param)(struct fs_context *fc, struct fs_parameter *param);
1494 : :
1495 : : int (*sb_alloc_security)(struct super_block *sb);
1496 : : void (*sb_free_security)(struct super_block *sb);
1497 : : void (*sb_free_mnt_opts)(void *mnt_opts);
1498 : : int (*sb_eat_lsm_opts)(char *orig, void **mnt_opts);
1499 : : int (*sb_remount)(struct super_block *sb, void *mnt_opts);
1500 : : int (*sb_kern_mount)(struct super_block *sb);
1501 : : int (*sb_show_options)(struct seq_file *m, struct super_block *sb);
1502 : : int (*sb_statfs)(struct dentry *dentry);
1503 : : int (*sb_mount)(const char *dev_name, const struct path *path,
1504 : : const char *type, unsigned long flags, void *data);
1505 : : int (*sb_umount)(struct vfsmount *mnt, int flags);
1506 : : int (*sb_pivotroot)(const struct path *old_path, const struct path *new_path);
1507 : : int (*sb_set_mnt_opts)(struct super_block *sb,
1508 : : void *mnt_opts,
1509 : : unsigned long kern_flags,
1510 : : unsigned long *set_kern_flags);
1511 : : int (*sb_clone_mnt_opts)(const struct super_block *oldsb,
1512 : : struct super_block *newsb,
1513 : : unsigned long kern_flags,
1514 : : unsigned long *set_kern_flags);
1515 : : int (*sb_add_mnt_opt)(const char *option, const char *val, int len,
1516 : : void **mnt_opts);
1517 : : int (*move_mount)(const struct path *from_path, const struct path *to_path);
1518 : : int (*dentry_init_security)(struct dentry *dentry, int mode,
1519 : : const struct qstr *name, void **ctx,
1520 : : u32 *ctxlen);
1521 : : int (*dentry_create_files_as)(struct dentry *dentry, int mode,
1522 : : struct qstr *name,
1523 : : const struct cred *old,
1524 : : struct cred *new);
1525 : :
1526 : :
1527 : : #ifdef CONFIG_SECURITY_PATH
1528 : : int (*path_unlink)(const struct path *dir, struct dentry *dentry);
1529 : : int (*path_mkdir)(const struct path *dir, struct dentry *dentry,
1530 : : umode_t mode);
1531 : : int (*path_rmdir)(const struct path *dir, struct dentry *dentry);
1532 : : int (*path_mknod)(const struct path *dir, struct dentry *dentry,
1533 : : umode_t mode, unsigned int dev);
1534 : : int (*path_truncate)(const struct path *path);
1535 : : int (*path_symlink)(const struct path *dir, struct dentry *dentry,
1536 : : const char *old_name);
1537 : : int (*path_link)(struct dentry *old_dentry, const struct path *new_dir,
1538 : : struct dentry *new_dentry);
1539 : : int (*path_rename)(const struct path *old_dir, struct dentry *old_dentry,
1540 : : const struct path *new_dir,
1541 : : struct dentry *new_dentry);
1542 : : int (*path_chmod)(const struct path *path, umode_t mode);
1543 : : int (*path_chown)(const struct path *path, kuid_t uid, kgid_t gid);
1544 : : int (*path_chroot)(const struct path *path);
1545 : : #endif
1546 : : /* Needed for inode based security check */
1547 : : int (*path_notify)(const struct path *path, u64 mask,
1548 : : unsigned int obj_type);
1549 : : int (*inode_alloc_security)(struct inode *inode);
1550 : : void (*inode_free_security)(struct inode *inode);
1551 : : int (*inode_init_security)(struct inode *inode, struct inode *dir,
1552 : : const struct qstr *qstr,
1553 : : const char **name, void **value,
1554 : : size_t *len);
1555 : : int (*inode_create)(struct inode *dir, struct dentry *dentry,
1556 : : umode_t mode);
1557 : : int (*inode_link)(struct dentry *old_dentry, struct inode *dir,
1558 : : struct dentry *new_dentry);
1559 : : int (*inode_unlink)(struct inode *dir, struct dentry *dentry);
1560 : : int (*inode_symlink)(struct inode *dir, struct dentry *dentry,
1561 : : const char *old_name);
1562 : : int (*inode_mkdir)(struct inode *dir, struct dentry *dentry,
1563 : : umode_t mode);
1564 : : int (*inode_rmdir)(struct inode *dir, struct dentry *dentry);
1565 : : int (*inode_mknod)(struct inode *dir, struct dentry *dentry,
1566 : : umode_t mode, dev_t dev);
1567 : : int (*inode_rename)(struct inode *old_dir, struct dentry *old_dentry,
1568 : : struct inode *new_dir,
1569 : : struct dentry *new_dentry);
1570 : : int (*inode_readlink)(struct dentry *dentry);
1571 : : int (*inode_follow_link)(struct dentry *dentry, struct inode *inode,
1572 : : bool rcu);
1573 : : int (*inode_permission)(struct inode *inode, int mask);
1574 : : int (*inode_setattr)(struct dentry *dentry, struct iattr *attr);
1575 : : int (*inode_getattr)(const struct path *path);
1576 : : int (*inode_setxattr)(struct dentry *dentry, const char *name,
1577 : : const void *value, size_t size, int flags);
1578 : : void (*inode_post_setxattr)(struct dentry *dentry, const char *name,
1579 : : const void *value, size_t size,
1580 : : int flags);
1581 : : int (*inode_getxattr)(struct dentry *dentry, const char *name);
1582 : : int (*inode_listxattr)(struct dentry *dentry);
1583 : : int (*inode_removexattr)(struct dentry *dentry, const char *name);
1584 : : int (*inode_need_killpriv)(struct dentry *dentry);
1585 : : int (*inode_killpriv)(struct dentry *dentry);
1586 : : int (*inode_getsecurity)(struct inode *inode, const char *name,
1587 : : void **buffer, bool alloc);
1588 : : int (*inode_setsecurity)(struct inode *inode, const char *name,
1589 : : const void *value, size_t size,
1590 : : int flags);
1591 : : int (*inode_listsecurity)(struct inode *inode, char *buffer,
1592 : : size_t buffer_size);
1593 : : void (*inode_getsecid)(struct inode *inode, u32 *secid);
1594 : : int (*inode_copy_up)(struct dentry *src, struct cred **new);
1595 : : int (*inode_copy_up_xattr)(const char *name);
1596 : :
1597 : : int (*kernfs_init_security)(struct kernfs_node *kn_dir,
1598 : : struct kernfs_node *kn);
1599 : :
1600 : : int (*file_permission)(struct file *file, int mask);
1601 : : int (*file_alloc_security)(struct file *file);
1602 : : void (*file_free_security)(struct file *file);
1603 : : int (*file_ioctl)(struct file *file, unsigned int cmd,
1604 : : unsigned long arg);
1605 : : int (*mmap_addr)(unsigned long addr);
1606 : : int (*mmap_file)(struct file *file, unsigned long reqprot,
1607 : : unsigned long prot, unsigned long flags);
1608 : : int (*file_mprotect)(struct vm_area_struct *vma, unsigned long reqprot,
1609 : : unsigned long prot);
1610 : : int (*file_lock)(struct file *file, unsigned int cmd);
1611 : : int (*file_fcntl)(struct file *file, unsigned int cmd,
1612 : : unsigned long arg);
1613 : : void (*file_set_fowner)(struct file *file);
1614 : : int (*file_send_sigiotask)(struct task_struct *tsk,
1615 : : struct fown_struct *fown, int sig);
1616 : : int (*file_receive)(struct file *file);
1617 : : int (*file_open)(struct file *file);
1618 : :
1619 : : int (*task_alloc)(struct task_struct *task, unsigned long clone_flags);
1620 : : void (*task_free)(struct task_struct *task);
1621 : : int (*cred_alloc_blank)(struct cred *cred, gfp_t gfp);
1622 : : void (*cred_free)(struct cred *cred);
1623 : : int (*cred_prepare)(struct cred *new, const struct cred *old,
1624 : : gfp_t gfp);
1625 : : void (*cred_transfer)(struct cred *new, const struct cred *old);
1626 : : void (*cred_getsecid)(const struct cred *c, u32 *secid);
1627 : : int (*kernel_act_as)(struct cred *new, u32 secid);
1628 : : int (*kernel_create_files_as)(struct cred *new, struct inode *inode);
1629 : : int (*kernel_module_request)(char *kmod_name);
1630 : : int (*kernel_load_data)(enum kernel_load_data_id id);
1631 : : int (*kernel_read_file)(struct file *file, enum kernel_read_file_id id);
1632 : : int (*kernel_post_read_file)(struct file *file, char *buf, loff_t size,
1633 : : enum kernel_read_file_id id);
1634 : : int (*task_fix_setuid)(struct cred *new, const struct cred *old,
1635 : : int flags);
1636 : : int (*task_setpgid)(struct task_struct *p, pid_t pgid);
1637 : : int (*task_getpgid)(struct task_struct *p);
1638 : : int (*task_getsid)(struct task_struct *p);
1639 : : void (*task_getsecid)(struct task_struct *p, u32 *secid);
1640 : : int (*task_setnice)(struct task_struct *p, int nice);
1641 : : int (*task_setioprio)(struct task_struct *p, int ioprio);
1642 : : int (*task_getioprio)(struct task_struct *p);
1643 : : int (*task_prlimit)(const struct cred *cred, const struct cred *tcred,
1644 : : unsigned int flags);
1645 : : int (*task_setrlimit)(struct task_struct *p, unsigned int resource,
1646 : : struct rlimit *new_rlim);
1647 : : int (*task_setscheduler)(struct task_struct *p);
1648 : : int (*task_getscheduler)(struct task_struct *p);
1649 : : int (*task_movememory)(struct task_struct *p);
1650 : : int (*task_kill)(struct task_struct *p, struct kernel_siginfo *info,
1651 : : int sig, const struct cred *cred);
1652 : : int (*task_prctl)(int option, unsigned long arg2, unsigned long arg3,
1653 : : unsigned long arg4, unsigned long arg5);
1654 : : void (*task_to_inode)(struct task_struct *p, struct inode *inode);
1655 : :
1656 : : int (*ipc_permission)(struct kern_ipc_perm *ipcp, short flag);
1657 : : void (*ipc_getsecid)(struct kern_ipc_perm *ipcp, u32 *secid);
1658 : :
1659 : : int (*msg_msg_alloc_security)(struct msg_msg *msg);
1660 : : void (*msg_msg_free_security)(struct msg_msg *msg);
1661 : :
1662 : : int (*msg_queue_alloc_security)(struct kern_ipc_perm *perm);
1663 : : void (*msg_queue_free_security)(struct kern_ipc_perm *perm);
1664 : : int (*msg_queue_associate)(struct kern_ipc_perm *perm, int msqflg);
1665 : : int (*msg_queue_msgctl)(struct kern_ipc_perm *perm, int cmd);
1666 : : int (*msg_queue_msgsnd)(struct kern_ipc_perm *perm, struct msg_msg *msg,
1667 : : int msqflg);
1668 : : int (*msg_queue_msgrcv)(struct kern_ipc_perm *perm, struct msg_msg *msg,
1669 : : struct task_struct *target, long type,
1670 : : int mode);
1671 : :
1672 : : int (*shm_alloc_security)(struct kern_ipc_perm *perm);
1673 : : void (*shm_free_security)(struct kern_ipc_perm *perm);
1674 : : int (*shm_associate)(struct kern_ipc_perm *perm, int shmflg);
1675 : : int (*shm_shmctl)(struct kern_ipc_perm *perm, int cmd);
1676 : : int (*shm_shmat)(struct kern_ipc_perm *perm, char __user *shmaddr,
1677 : : int shmflg);
1678 : :
1679 : : int (*sem_alloc_security)(struct kern_ipc_perm *perm);
1680 : : void (*sem_free_security)(struct kern_ipc_perm *perm);
1681 : : int (*sem_associate)(struct kern_ipc_perm *perm, int semflg);
1682 : : int (*sem_semctl)(struct kern_ipc_perm *perm, int cmd);
1683 : : int (*sem_semop)(struct kern_ipc_perm *perm, struct sembuf *sops,
1684 : : unsigned nsops, int alter);
1685 : :
1686 : : int (*netlink_send)(struct sock *sk, struct sk_buff *skb);
1687 : :
1688 : : void (*d_instantiate)(struct dentry *dentry, struct inode *inode);
1689 : :
1690 : : int (*getprocattr)(struct task_struct *p, char *name, char **value);
1691 : : int (*setprocattr)(const char *name, void *value, size_t size);
1692 : : int (*ismaclabel)(const char *name);
1693 : : int (*secid_to_secctx)(u32 secid, char **secdata, u32 *seclen);
1694 : : int (*secctx_to_secid)(const char *secdata, u32 seclen, u32 *secid);
1695 : : void (*release_secctx)(char *secdata, u32 seclen);
1696 : :
1697 : : void (*inode_invalidate_secctx)(struct inode *inode);
1698 : : int (*inode_notifysecctx)(struct inode *inode, void *ctx, u32 ctxlen);
1699 : : int (*inode_setsecctx)(struct dentry *dentry, void *ctx, u32 ctxlen);
1700 : : int (*inode_getsecctx)(struct inode *inode, void **ctx, u32 *ctxlen);
1701 : :
1702 : : #ifdef CONFIG_SECURITY_NETWORK
1703 : : int (*unix_stream_connect)(struct sock *sock, struct sock *other,
1704 : : struct sock *newsk);
1705 : : int (*unix_may_send)(struct socket *sock, struct socket *other);
1706 : :
1707 : : int (*socket_create)(int family, int type, int protocol, int kern);
1708 : : int (*socket_post_create)(struct socket *sock, int family, int type,
1709 : : int protocol, int kern);
1710 : : int (*socket_socketpair)(struct socket *socka, struct socket *sockb);
1711 : : int (*socket_bind)(struct socket *sock, struct sockaddr *address,
1712 : : int addrlen);
1713 : : int (*socket_connect)(struct socket *sock, struct sockaddr *address,
1714 : : int addrlen);
1715 : : int (*socket_listen)(struct socket *sock, int backlog);
1716 : : int (*socket_accept)(struct socket *sock, struct socket *newsock);
1717 : : int (*socket_sendmsg)(struct socket *sock, struct msghdr *msg,
1718 : : int size);
1719 : : int (*socket_recvmsg)(struct socket *sock, struct msghdr *msg,
1720 : : int size, int flags);
1721 : : int (*socket_getsockname)(struct socket *sock);
1722 : : int (*socket_getpeername)(struct socket *sock);
1723 : : int (*socket_getsockopt)(struct socket *sock, int level, int optname);
1724 : : int (*socket_setsockopt)(struct socket *sock, int level, int optname);
1725 : : int (*socket_shutdown)(struct socket *sock, int how);
1726 : : int (*socket_sock_rcv_skb)(struct sock *sk, struct sk_buff *skb);
1727 : : int (*socket_getpeersec_stream)(struct socket *sock,
1728 : : char __user *optval,
1729 : : int __user *optlen, unsigned len);
1730 : : int (*socket_getpeersec_dgram)(struct socket *sock,
1731 : : struct sk_buff *skb, u32 *secid);
1732 : : int (*sk_alloc_security)(struct sock *sk, int family, gfp_t priority);
1733 : : void (*sk_free_security)(struct sock *sk);
1734 : : void (*sk_clone_security)(const struct sock *sk, struct sock *newsk);
1735 : : void (*sk_getsecid)(struct sock *sk, u32 *secid);
1736 : : void (*sock_graft)(struct sock *sk, struct socket *parent);
1737 : : int (*inet_conn_request)(struct sock *sk, struct sk_buff *skb,
1738 : : struct request_sock *req);
1739 : : void (*inet_csk_clone)(struct sock *newsk,
1740 : : const struct request_sock *req);
1741 : : void (*inet_conn_established)(struct sock *sk, struct sk_buff *skb);
1742 : : int (*secmark_relabel_packet)(u32 secid);
1743 : : void (*secmark_refcount_inc)(void);
1744 : : void (*secmark_refcount_dec)(void);
1745 : : void (*req_classify_flow)(const struct request_sock *req,
1746 : : struct flowi *fl);
1747 : : int (*tun_dev_alloc_security)(void **security);
1748 : : void (*tun_dev_free_security)(void *security);
1749 : : int (*tun_dev_create)(void);
1750 : : int (*tun_dev_attach_queue)(void *security);
1751 : : int (*tun_dev_attach)(struct sock *sk, void *security);
1752 : : int (*tun_dev_open)(void *security);
1753 : : int (*sctp_assoc_request)(struct sctp_endpoint *ep,
1754 : : struct sk_buff *skb);
1755 : : int (*sctp_bind_connect)(struct sock *sk, int optname,
1756 : : struct sockaddr *address, int addrlen);
1757 : : void (*sctp_sk_clone)(struct sctp_endpoint *ep, struct sock *sk,
1758 : : struct sock *newsk);
1759 : : #endif /* CONFIG_SECURITY_NETWORK */
1760 : :
1761 : : #ifdef CONFIG_SECURITY_INFINIBAND
1762 : : int (*ib_pkey_access)(void *sec, u64 subnet_prefix, u16 pkey);
1763 : : int (*ib_endport_manage_subnet)(void *sec, const char *dev_name,
1764 : : u8 port_num);
1765 : : int (*ib_alloc_security)(void **sec);
1766 : : void (*ib_free_security)(void *sec);
1767 : : #endif /* CONFIG_SECURITY_INFINIBAND */
1768 : :
1769 : : #ifdef CONFIG_SECURITY_NETWORK_XFRM
1770 : : int (*xfrm_policy_alloc_security)(struct xfrm_sec_ctx **ctxp,
1771 : : struct xfrm_user_sec_ctx *sec_ctx,
1772 : : gfp_t gfp);
1773 : : int (*xfrm_policy_clone_security)(struct xfrm_sec_ctx *old_ctx,
1774 : : struct xfrm_sec_ctx **new_ctx);
1775 : : void (*xfrm_policy_free_security)(struct xfrm_sec_ctx *ctx);
1776 : : int (*xfrm_policy_delete_security)(struct xfrm_sec_ctx *ctx);
1777 : : int (*xfrm_state_alloc)(struct xfrm_state *x,
1778 : : struct xfrm_user_sec_ctx *sec_ctx);
1779 : : int (*xfrm_state_alloc_acquire)(struct xfrm_state *x,
1780 : : struct xfrm_sec_ctx *polsec,
1781 : : u32 secid);
1782 : : void (*xfrm_state_free_security)(struct xfrm_state *x);
1783 : : int (*xfrm_state_delete_security)(struct xfrm_state *x);
1784 : : int (*xfrm_policy_lookup)(struct xfrm_sec_ctx *ctx, u32 fl_secid,
1785 : : u8 dir);
1786 : : int (*xfrm_state_pol_flow_match)(struct xfrm_state *x,
1787 : : struct xfrm_policy *xp,
1788 : : const struct flowi *fl);
1789 : : int (*xfrm_decode_session)(struct sk_buff *skb, u32 *secid, int ckall);
1790 : : #endif /* CONFIG_SECURITY_NETWORK_XFRM */
1791 : :
1792 : : /* key management security hooks */
1793 : : #ifdef CONFIG_KEYS
1794 : : int (*key_alloc)(struct key *key, const struct cred *cred,
1795 : : unsigned long flags);
1796 : : void (*key_free)(struct key *key);
1797 : : int (*key_permission)(key_ref_t key_ref, const struct cred *cred,
1798 : : unsigned perm);
1799 : : int (*key_getsecurity)(struct key *key, char **_buffer);
1800 : : #endif /* CONFIG_KEYS */
1801 : :
1802 : : #ifdef CONFIG_AUDIT
1803 : : int (*audit_rule_init)(u32 field, u32 op, char *rulestr,
1804 : : void **lsmrule);
1805 : : int (*audit_rule_known)(struct audit_krule *krule);
1806 : : int (*audit_rule_match)(u32 secid, u32 field, u32 op, void *lsmrule);
1807 : : void (*audit_rule_free)(void *lsmrule);
1808 : : #endif /* CONFIG_AUDIT */
1809 : :
1810 : : #ifdef CONFIG_BPF_SYSCALL
1811 : : int (*bpf)(int cmd, union bpf_attr *attr,
1812 : : unsigned int size);
1813 : : int (*bpf_map)(struct bpf_map *map, fmode_t fmode);
1814 : : int (*bpf_prog)(struct bpf_prog *prog);
1815 : : int (*bpf_map_alloc_security)(struct bpf_map *map);
1816 : : void (*bpf_map_free_security)(struct bpf_map *map);
1817 : : int (*bpf_prog_alloc_security)(struct bpf_prog_aux *aux);
1818 : : void (*bpf_prog_free_security)(struct bpf_prog_aux *aux);
1819 : : #endif /* CONFIG_BPF_SYSCALL */
1820 : : int (*locked_down)(enum lockdown_reason what);
1821 : : #ifdef CONFIG_PERF_EVENTS
1822 : : int (*perf_event_open)(struct perf_event_attr *attr, int type);
1823 : : int (*perf_event_alloc)(struct perf_event *event);
1824 : : void (*perf_event_free)(struct perf_event *event);
1825 : : int (*perf_event_read)(struct perf_event *event);
1826 : : int (*perf_event_write)(struct perf_event *event);
1827 : :
1828 : : #endif
1829 : : };
1830 : :
1831 : : struct security_hook_heads {
1832 : : struct hlist_head binder_set_context_mgr;
1833 : : struct hlist_head binder_transaction;
1834 : : struct hlist_head binder_transfer_binder;
1835 : : struct hlist_head binder_transfer_file;
1836 : : struct hlist_head ptrace_access_check;
1837 : : struct hlist_head ptrace_traceme;
1838 : : struct hlist_head capget;
1839 : : struct hlist_head capset;
1840 : : struct hlist_head capable;
1841 : : struct hlist_head quotactl;
1842 : : struct hlist_head quota_on;
1843 : : struct hlist_head syslog;
1844 : : struct hlist_head settime;
1845 : : struct hlist_head vm_enough_memory;
1846 : : struct hlist_head bprm_set_creds;
1847 : : struct hlist_head bprm_check_security;
1848 : : struct hlist_head bprm_committing_creds;
1849 : : struct hlist_head bprm_committed_creds;
1850 : : struct hlist_head fs_context_dup;
1851 : : struct hlist_head fs_context_parse_param;
1852 : : struct hlist_head sb_alloc_security;
1853 : : struct hlist_head sb_free_security;
1854 : : struct hlist_head sb_free_mnt_opts;
1855 : : struct hlist_head sb_eat_lsm_opts;
1856 : : struct hlist_head sb_remount;
1857 : : struct hlist_head sb_kern_mount;
1858 : : struct hlist_head sb_show_options;
1859 : : struct hlist_head sb_statfs;
1860 : : struct hlist_head sb_mount;
1861 : : struct hlist_head sb_umount;
1862 : : struct hlist_head sb_pivotroot;
1863 : : struct hlist_head sb_set_mnt_opts;
1864 : : struct hlist_head sb_clone_mnt_opts;
1865 : : struct hlist_head sb_add_mnt_opt;
1866 : : struct hlist_head move_mount;
1867 : : struct hlist_head dentry_init_security;
1868 : : struct hlist_head dentry_create_files_as;
1869 : : #ifdef CONFIG_SECURITY_PATH
1870 : : struct hlist_head path_unlink;
1871 : : struct hlist_head path_mkdir;
1872 : : struct hlist_head path_rmdir;
1873 : : struct hlist_head path_mknod;
1874 : : struct hlist_head path_truncate;
1875 : : struct hlist_head path_symlink;
1876 : : struct hlist_head path_link;
1877 : : struct hlist_head path_rename;
1878 : : struct hlist_head path_chmod;
1879 : : struct hlist_head path_chown;
1880 : : struct hlist_head path_chroot;
1881 : : #endif
1882 : : /* Needed for inode based modules as well */
1883 : : struct hlist_head path_notify;
1884 : : struct hlist_head inode_alloc_security;
1885 : : struct hlist_head inode_free_security;
1886 : : struct hlist_head inode_init_security;
1887 : : struct hlist_head inode_create;
1888 : : struct hlist_head inode_link;
1889 : : struct hlist_head inode_unlink;
1890 : : struct hlist_head inode_symlink;
1891 : : struct hlist_head inode_mkdir;
1892 : : struct hlist_head inode_rmdir;
1893 : : struct hlist_head inode_mknod;
1894 : : struct hlist_head inode_rename;
1895 : : struct hlist_head inode_readlink;
1896 : : struct hlist_head inode_follow_link;
1897 : : struct hlist_head inode_permission;
1898 : : struct hlist_head inode_setattr;
1899 : : struct hlist_head inode_getattr;
1900 : : struct hlist_head inode_setxattr;
1901 : : struct hlist_head inode_post_setxattr;
1902 : : struct hlist_head inode_getxattr;
1903 : : struct hlist_head inode_listxattr;
1904 : : struct hlist_head inode_removexattr;
1905 : : struct hlist_head inode_need_killpriv;
1906 : : struct hlist_head inode_killpriv;
1907 : : struct hlist_head inode_getsecurity;
1908 : : struct hlist_head inode_setsecurity;
1909 : : struct hlist_head inode_listsecurity;
1910 : : struct hlist_head inode_getsecid;
1911 : : struct hlist_head inode_copy_up;
1912 : : struct hlist_head inode_copy_up_xattr;
1913 : : struct hlist_head kernfs_init_security;
1914 : : struct hlist_head file_permission;
1915 : : struct hlist_head file_alloc_security;
1916 : : struct hlist_head file_free_security;
1917 : : struct hlist_head file_ioctl;
1918 : : struct hlist_head mmap_addr;
1919 : : struct hlist_head mmap_file;
1920 : : struct hlist_head file_mprotect;
1921 : : struct hlist_head file_lock;
1922 : : struct hlist_head file_fcntl;
1923 : : struct hlist_head file_set_fowner;
1924 : : struct hlist_head file_send_sigiotask;
1925 : : struct hlist_head file_receive;
1926 : : struct hlist_head file_open;
1927 : : struct hlist_head task_alloc;
1928 : : struct hlist_head task_free;
1929 : : struct hlist_head cred_alloc_blank;
1930 : : struct hlist_head cred_free;
1931 : : struct hlist_head cred_prepare;
1932 : : struct hlist_head cred_transfer;
1933 : : struct hlist_head cred_getsecid;
1934 : : struct hlist_head kernel_act_as;
1935 : : struct hlist_head kernel_create_files_as;
1936 : : struct hlist_head kernel_load_data;
1937 : : struct hlist_head kernel_read_file;
1938 : : struct hlist_head kernel_post_read_file;
1939 : : struct hlist_head kernel_module_request;
1940 : : struct hlist_head task_fix_setuid;
1941 : : struct hlist_head task_setpgid;
1942 : : struct hlist_head task_getpgid;
1943 : : struct hlist_head task_getsid;
1944 : : struct hlist_head task_getsecid;
1945 : : struct hlist_head task_setnice;
1946 : : struct hlist_head task_setioprio;
1947 : : struct hlist_head task_getioprio;
1948 : : struct hlist_head task_prlimit;
1949 : : struct hlist_head task_setrlimit;
1950 : : struct hlist_head task_setscheduler;
1951 : : struct hlist_head task_getscheduler;
1952 : : struct hlist_head task_movememory;
1953 : : struct hlist_head task_kill;
1954 : : struct hlist_head task_prctl;
1955 : : struct hlist_head task_to_inode;
1956 : : struct hlist_head ipc_permission;
1957 : : struct hlist_head ipc_getsecid;
1958 : : struct hlist_head msg_msg_alloc_security;
1959 : : struct hlist_head msg_msg_free_security;
1960 : : struct hlist_head msg_queue_alloc_security;
1961 : : struct hlist_head msg_queue_free_security;
1962 : : struct hlist_head msg_queue_associate;
1963 : : struct hlist_head msg_queue_msgctl;
1964 : : struct hlist_head msg_queue_msgsnd;
1965 : : struct hlist_head msg_queue_msgrcv;
1966 : : struct hlist_head shm_alloc_security;
1967 : : struct hlist_head shm_free_security;
1968 : : struct hlist_head shm_associate;
1969 : : struct hlist_head shm_shmctl;
1970 : : struct hlist_head shm_shmat;
1971 : : struct hlist_head sem_alloc_security;
1972 : : struct hlist_head sem_free_security;
1973 : : struct hlist_head sem_associate;
1974 : : struct hlist_head sem_semctl;
1975 : : struct hlist_head sem_semop;
1976 : : struct hlist_head netlink_send;
1977 : : struct hlist_head d_instantiate;
1978 : : struct hlist_head getprocattr;
1979 : : struct hlist_head setprocattr;
1980 : : struct hlist_head ismaclabel;
1981 : : struct hlist_head secid_to_secctx;
1982 : : struct hlist_head secctx_to_secid;
1983 : : struct hlist_head release_secctx;
1984 : : struct hlist_head inode_invalidate_secctx;
1985 : : struct hlist_head inode_notifysecctx;
1986 : : struct hlist_head inode_setsecctx;
1987 : : struct hlist_head inode_getsecctx;
1988 : : #ifdef CONFIG_SECURITY_NETWORK
1989 : : struct hlist_head unix_stream_connect;
1990 : : struct hlist_head unix_may_send;
1991 : : struct hlist_head socket_create;
1992 : : struct hlist_head socket_post_create;
1993 : : struct hlist_head socket_socketpair;
1994 : : struct hlist_head socket_bind;
1995 : : struct hlist_head socket_connect;
1996 : : struct hlist_head socket_listen;
1997 : : struct hlist_head socket_accept;
1998 : : struct hlist_head socket_sendmsg;
1999 : : struct hlist_head socket_recvmsg;
2000 : : struct hlist_head socket_getsockname;
2001 : : struct hlist_head socket_getpeername;
2002 : : struct hlist_head socket_getsockopt;
2003 : : struct hlist_head socket_setsockopt;
2004 : : struct hlist_head socket_shutdown;
2005 : : struct hlist_head socket_sock_rcv_skb;
2006 : : struct hlist_head socket_getpeersec_stream;
2007 : : struct hlist_head socket_getpeersec_dgram;
2008 : : struct hlist_head sk_alloc_security;
2009 : : struct hlist_head sk_free_security;
2010 : : struct hlist_head sk_clone_security;
2011 : : struct hlist_head sk_getsecid;
2012 : : struct hlist_head sock_graft;
2013 : : struct hlist_head inet_conn_request;
2014 : : struct hlist_head inet_csk_clone;
2015 : : struct hlist_head inet_conn_established;
2016 : : struct hlist_head secmark_relabel_packet;
2017 : : struct hlist_head secmark_refcount_inc;
2018 : : struct hlist_head secmark_refcount_dec;
2019 : : struct hlist_head req_classify_flow;
2020 : : struct hlist_head tun_dev_alloc_security;
2021 : : struct hlist_head tun_dev_free_security;
2022 : : struct hlist_head tun_dev_create;
2023 : : struct hlist_head tun_dev_attach_queue;
2024 : : struct hlist_head tun_dev_attach;
2025 : : struct hlist_head tun_dev_open;
2026 : : struct hlist_head sctp_assoc_request;
2027 : : struct hlist_head sctp_bind_connect;
2028 : : struct hlist_head sctp_sk_clone;
2029 : : #endif /* CONFIG_SECURITY_NETWORK */
2030 : : #ifdef CONFIG_SECURITY_INFINIBAND
2031 : : struct hlist_head ib_pkey_access;
2032 : : struct hlist_head ib_endport_manage_subnet;
2033 : : struct hlist_head ib_alloc_security;
2034 : : struct hlist_head ib_free_security;
2035 : : #endif /* CONFIG_SECURITY_INFINIBAND */
2036 : : #ifdef CONFIG_SECURITY_NETWORK_XFRM
2037 : : struct hlist_head xfrm_policy_alloc_security;
2038 : : struct hlist_head xfrm_policy_clone_security;
2039 : : struct hlist_head xfrm_policy_free_security;
2040 : : struct hlist_head xfrm_policy_delete_security;
2041 : : struct hlist_head xfrm_state_alloc;
2042 : : struct hlist_head xfrm_state_alloc_acquire;
2043 : : struct hlist_head xfrm_state_free_security;
2044 : : struct hlist_head xfrm_state_delete_security;
2045 : : struct hlist_head xfrm_policy_lookup;
2046 : : struct hlist_head xfrm_state_pol_flow_match;
2047 : : struct hlist_head xfrm_decode_session;
2048 : : #endif /* CONFIG_SECURITY_NETWORK_XFRM */
2049 : : #ifdef CONFIG_KEYS
2050 : : struct hlist_head key_alloc;
2051 : : struct hlist_head key_free;
2052 : : struct hlist_head key_permission;
2053 : : struct hlist_head key_getsecurity;
2054 : : #endif /* CONFIG_KEYS */
2055 : : #ifdef CONFIG_AUDIT
2056 : : struct hlist_head audit_rule_init;
2057 : : struct hlist_head audit_rule_known;
2058 : : struct hlist_head audit_rule_match;
2059 : : struct hlist_head audit_rule_free;
2060 : : #endif /* CONFIG_AUDIT */
2061 : : #ifdef CONFIG_BPF_SYSCALL
2062 : : struct hlist_head bpf;
2063 : : struct hlist_head bpf_map;
2064 : : struct hlist_head bpf_prog;
2065 : : struct hlist_head bpf_map_alloc_security;
2066 : : struct hlist_head bpf_map_free_security;
2067 : : struct hlist_head bpf_prog_alloc_security;
2068 : : struct hlist_head bpf_prog_free_security;
2069 : : #endif /* CONFIG_BPF_SYSCALL */
2070 : : struct hlist_head locked_down;
2071 : : #ifdef CONFIG_PERF_EVENTS
2072 : : struct hlist_head perf_event_open;
2073 : : struct hlist_head perf_event_alloc;
2074 : : struct hlist_head perf_event_free;
2075 : : struct hlist_head perf_event_read;
2076 : : struct hlist_head perf_event_write;
2077 : : #endif
2078 : : } __randomize_layout;
2079 : :
2080 : : /*
2081 : : * Security module hook list structure.
2082 : : * For use with generic list macros for common operations.
2083 : : */
2084 : : struct security_hook_list {
2085 : : struct hlist_node list;
2086 : : struct hlist_head *head;
2087 : : union security_list_options hook;
2088 : : char *lsm;
2089 : : } __randomize_layout;
2090 : :
2091 : : /*
2092 : : * Security blob size or offset data.
2093 : : */
2094 : : struct lsm_blob_sizes {
2095 : : int lbs_cred;
2096 : : int lbs_file;
2097 : : int lbs_inode;
2098 : : int lbs_ipc;
2099 : : int lbs_msg_msg;
2100 : : int lbs_task;
2101 : : };
2102 : :
2103 : : /*
2104 : : * Initializing a security_hook_list structure takes
2105 : : * up a lot of space in a source file. This macro takes
2106 : : * care of the common case and reduces the amount of
2107 : : * text involved.
2108 : : */
2109 : : #define LSM_HOOK_INIT(HEAD, HOOK) \
2110 : : { .head = &security_hook_heads.HEAD, .hook = { .HEAD = HOOK } }
2111 : :
2112 : : extern struct security_hook_heads security_hook_heads;
2113 : : extern char *lsm_names;
2114 : :
2115 : : extern void security_add_hooks(struct security_hook_list *hooks, int count,
2116 : : char *lsm);
2117 : :
2118 : : #define LSM_FLAG_LEGACY_MAJOR BIT(0)
2119 : : #define LSM_FLAG_EXCLUSIVE BIT(1)
2120 : :
2121 : : enum lsm_order {
2122 : : LSM_ORDER_FIRST = -1, /* This is only for capabilities. */
2123 : : LSM_ORDER_MUTABLE = 0,
2124 : : };
2125 : :
2126 : : struct lsm_info {
2127 : : const char *name; /* Required. */
2128 : : enum lsm_order order; /* Optional: default is LSM_ORDER_MUTABLE */
2129 : : unsigned long flags; /* Optional: flags describing LSM */
2130 : : int *enabled; /* Optional: controlled by CONFIG_LSM */
2131 : : int (*init)(void); /* Required. */
2132 : : struct lsm_blob_sizes *blobs; /* Optional: for blob sharing. */
2133 : : };
2134 : :
2135 : : extern struct lsm_info __start_lsm_info[], __end_lsm_info[];
2136 : : extern struct lsm_info __start_early_lsm_info[], __end_early_lsm_info[];
2137 : :
2138 : : #define DEFINE_LSM(lsm) \
2139 : : static struct lsm_info __lsm_##lsm \
2140 : : __used __section(.lsm_info.init) \
2141 : : __aligned(sizeof(unsigned long))
2142 : :
2143 : : #define DEFINE_EARLY_LSM(lsm) \
2144 : : static struct lsm_info __early_lsm_##lsm \
2145 : : __used __section(.early_lsm_info.init) \
2146 : : __aligned(sizeof(unsigned long))
2147 : :
2148 : : #ifdef CONFIG_SECURITY_SELINUX_DISABLE
2149 : : /*
2150 : : * Assuring the safety of deleting a security module is up to
2151 : : * the security module involved. This may entail ordering the
2152 : : * module's hook list in a particular way, refusing to disable
2153 : : * the module once a policy is loaded or any number of other
2154 : : * actions better imagined than described.
2155 : : *
2156 : : * The name of the configuration option reflects the only module
2157 : : * that currently uses the mechanism. Any developer who thinks
2158 : : * disabling their module is a good idea needs to be at least as
2159 : : * careful as the SELinux team.
2160 : : */
2161 : : static inline void security_delete_hooks(struct security_hook_list *hooks,
2162 : : int count)
2163 : : {
2164 : : int i;
2165 : :
2166 [ # # ]: 0 : for (i = 0; i < count; i++)
2167 [ # # ]: 0 : hlist_del_rcu(&hooks[i].list);
2168 : : }
2169 : : #endif /* CONFIG_SECURITY_SELINUX_DISABLE */
2170 : :
2171 : : /* Currently required to handle SELinux runtime hook disable. */
2172 : : #ifdef CONFIG_SECURITY_WRITABLE_HOOKS
2173 : : #define __lsm_ro_after_init
2174 : : #else
2175 : : #define __lsm_ro_after_init __ro_after_init
2176 : : #endif /* CONFIG_SECURITY_WRITABLE_HOOKS */
2177 : :
2178 : : extern int lsm_inode_alloc(struct inode *inode);
2179 : :
2180 : : #endif /* ! __LINUX_LSM_HOOKS_H */
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