2 * Security plug functions
4 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
7 * Copyright (C) 2016 Mellanox Technologies
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
15 #include <linux/capability.h>
16 #include <linux/dcache.h>
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/kernel.h>
20 #include <linux/lsm_hooks.h>
21 #include <linux/integrity.h>
22 #include <linux/ima.h>
23 #include <linux/evm.h>
24 #include <linux/fsnotify.h>
25 #include <linux/mman.h>
26 #include <linux/mount.h>
27 #include <linux/personality.h>
28 #include <linux/backing-dev.h>
29 #include <linux/string.h>
32 #define MAX_LSM_EVM_XATTR 2
34 /* Maximum number of letters for an LSM name string */
35 #define SECURITY_NAME_MAX 10
37 struct security_hook_heads security_hook_heads __lsm_ro_after_init;
38 static ATOMIC_NOTIFIER_HEAD(lsm_notifier_chain);
41 /* Boot-time LSM user choice */
42 static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] =
43 CONFIG_DEFAULT_SECURITY;
45 static void __init do_security_initcalls(void)
48 call = __security_initcall_start;
49 while (call < __security_initcall_end) {
56 * security_init - initializes the security framework
58 * This should be called early in the kernel initialization sequence.
60 int __init security_init(void)
63 struct list_head *list = (struct list_head *) &security_hook_heads;
65 for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct list_head);
67 INIT_LIST_HEAD(&list[i]);
68 pr_info("Security Framework initialized\n");
71 * Load minor LSMs, with the capability module always first.
73 capability_add_hooks();
78 * Load all the remaining security modules.
80 do_security_initcalls();
85 /* Save user chosen LSM */
86 static int __init choose_lsm(char *str)
88 strncpy(chosen_lsm, str, SECURITY_NAME_MAX);
91 __setup("security=", choose_lsm);
93 static bool match_last_lsm(const char *list, const char *lsm)
97 if (WARN_ON(!list || !lsm))
99 last = strrchr(list, ',');
101 /* Pass the comma, strcmp() will check for '\0' */
105 return !strcmp(last, lsm);
108 static int lsm_append(char *new, char **result)
112 if (*result == NULL) {
113 *result = kstrdup(new, GFP_KERNEL);
117 /* Check if it is the last registered name */
118 if (match_last_lsm(*result, new))
120 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
130 * security_module_enable - Load given security module on boot ?
131 * @module: the name of the module
133 * Each LSM must pass this method before registering its own operations
134 * to avoid security registration races. This method may also be used
135 * to check if your LSM is currently loaded during kernel initialization.
141 * - The passed LSM is the one chosen by user at boot time,
142 * - or the passed LSM is configured as the default and the user did not
143 * choose an alternate LSM at boot time.
145 * Otherwise, return false.
147 int __init security_module_enable(const char *module)
149 return !strcmp(module, chosen_lsm);
153 * security_add_hooks - Add a modules hooks to the hook lists.
154 * @hooks: the hooks to add
155 * @count: the number of hooks to add
156 * @lsm: the name of the security module
158 * Each LSM has to register its hooks with the infrastructure.
160 void __init security_add_hooks(struct security_hook_list *hooks, int count,
165 for (i = 0; i < count; i++) {
167 list_add_tail_rcu(&hooks[i].list, hooks[i].head);
169 if (lsm_append(lsm, &lsm_names) < 0)
170 panic("%s - Cannot get early memory.\n", __func__);
173 int call_lsm_notifier(enum lsm_event event, void *data)
175 return atomic_notifier_call_chain(&lsm_notifier_chain, event, data);
177 EXPORT_SYMBOL(call_lsm_notifier);
179 int register_lsm_notifier(struct notifier_block *nb)
181 return atomic_notifier_chain_register(&lsm_notifier_chain, nb);
183 EXPORT_SYMBOL(register_lsm_notifier);
185 int unregister_lsm_notifier(struct notifier_block *nb)
187 return atomic_notifier_chain_unregister(&lsm_notifier_chain, nb);
189 EXPORT_SYMBOL(unregister_lsm_notifier);
192 * Hook list operation macros.
195 * This is a hook that does not return a value.
198 * This is a hook that returns a value.
201 #define call_void_hook(FUNC, ...) \
203 struct security_hook_list *P; \
205 list_for_each_entry(P, &security_hook_heads.FUNC, list) \
206 P->hook.FUNC(__VA_ARGS__); \
209 #define call_int_hook(FUNC, IRC, ...) ({ \
212 struct security_hook_list *P; \
214 list_for_each_entry(P, &security_hook_heads.FUNC, list) { \
215 RC = P->hook.FUNC(__VA_ARGS__); \
223 /* Security operations */
225 int security_binder_set_context_mgr(struct task_struct *mgr)
227 return call_int_hook(binder_set_context_mgr, 0, mgr);
230 int security_binder_transaction(struct task_struct *from,
231 struct task_struct *to)
233 return call_int_hook(binder_transaction, 0, from, to);
236 int security_binder_transfer_binder(struct task_struct *from,
237 struct task_struct *to)
239 return call_int_hook(binder_transfer_binder, 0, from, to);
242 int security_binder_transfer_file(struct task_struct *from,
243 struct task_struct *to, struct file *file)
245 return call_int_hook(binder_transfer_file, 0, from, to, file);
248 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
250 return call_int_hook(ptrace_access_check, 0, child, mode);
253 int security_ptrace_traceme(struct task_struct *parent)
255 return call_int_hook(ptrace_traceme, 0, parent);
258 int security_capget(struct task_struct *target,
259 kernel_cap_t *effective,
260 kernel_cap_t *inheritable,
261 kernel_cap_t *permitted)
263 return call_int_hook(capget, 0, target,
264 effective, inheritable, permitted);
267 int security_capset(struct cred *new, const struct cred *old,
268 const kernel_cap_t *effective,
269 const kernel_cap_t *inheritable,
270 const kernel_cap_t *permitted)
272 return call_int_hook(capset, 0, new, old,
273 effective, inheritable, permitted);
276 int security_capable(const struct cred *cred, struct user_namespace *ns,
279 return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_AUDIT);
282 int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns,
285 return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_NOAUDIT);
288 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
290 return call_int_hook(quotactl, 0, cmds, type, id, sb);
293 int security_quota_on(struct dentry *dentry)
295 return call_int_hook(quota_on, 0, dentry);
298 int security_syslog(int type)
300 return call_int_hook(syslog, 0, type);
303 int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
305 return call_int_hook(settime, 0, ts, tz);
308 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
310 struct security_hook_list *hp;
311 int cap_sys_admin = 1;
315 * The module will respond with a positive value if
316 * it thinks the __vm_enough_memory() call should be
317 * made with the cap_sys_admin set. If all of the modules
318 * agree that it should be set it will. If any module
319 * thinks it should not be set it won't.
321 list_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
322 rc = hp->hook.vm_enough_memory(mm, pages);
328 return __vm_enough_memory(mm, pages, cap_sys_admin);
331 int security_bprm_set_creds(struct linux_binprm *bprm)
333 return call_int_hook(bprm_set_creds, 0, bprm);
336 int security_bprm_check(struct linux_binprm *bprm)
340 ret = call_int_hook(bprm_check_security, 0, bprm);
343 return ima_bprm_check(bprm);
346 void security_bprm_committing_creds(struct linux_binprm *bprm)
348 call_void_hook(bprm_committing_creds, bprm);
351 void security_bprm_committed_creds(struct linux_binprm *bprm)
353 call_void_hook(bprm_committed_creds, bprm);
356 int security_sb_alloc(struct super_block *sb)
358 return call_int_hook(sb_alloc_security, 0, sb);
361 void security_sb_free(struct super_block *sb)
363 call_void_hook(sb_free_security, sb);
366 int security_sb_copy_data(char *orig, char *copy)
368 return call_int_hook(sb_copy_data, 0, orig, copy);
370 EXPORT_SYMBOL(security_sb_copy_data);
372 int security_sb_remount(struct super_block *sb, void *data)
374 return call_int_hook(sb_remount, 0, sb, data);
377 int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
379 return call_int_hook(sb_kern_mount, 0, sb, flags, data);
382 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
384 return call_int_hook(sb_show_options, 0, m, sb);
387 int security_sb_statfs(struct dentry *dentry)
389 return call_int_hook(sb_statfs, 0, dentry);
392 int security_sb_mount(const char *dev_name, const struct path *path,
393 const char *type, unsigned long flags, void *data)
395 return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
398 int security_sb_umount(struct vfsmount *mnt, int flags)
400 return call_int_hook(sb_umount, 0, mnt, flags);
403 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
405 return call_int_hook(sb_pivotroot, 0, old_path, new_path);
408 int security_sb_set_mnt_opts(struct super_block *sb,
409 struct security_mnt_opts *opts,
410 unsigned long kern_flags,
411 unsigned long *set_kern_flags)
413 return call_int_hook(sb_set_mnt_opts,
414 opts->num_mnt_opts ? -EOPNOTSUPP : 0, sb,
415 opts, kern_flags, set_kern_flags);
417 EXPORT_SYMBOL(security_sb_set_mnt_opts);
419 int security_sb_clone_mnt_opts(const struct super_block *oldsb,
420 struct super_block *newsb,
421 unsigned long kern_flags,
422 unsigned long *set_kern_flags)
424 return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb,
425 kern_flags, set_kern_flags);
427 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
429 int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
431 return call_int_hook(sb_parse_opts_str, 0, options, opts);
433 EXPORT_SYMBOL(security_sb_parse_opts_str);
435 int security_inode_alloc(struct inode *inode)
437 inode->i_security = NULL;
438 return call_int_hook(inode_alloc_security, 0, inode);
441 void security_inode_free(struct inode *inode)
443 integrity_inode_free(inode);
444 call_void_hook(inode_free_security, inode);
447 int security_dentry_init_security(struct dentry *dentry, int mode,
448 const struct qstr *name, void **ctx,
451 return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
454 EXPORT_SYMBOL(security_dentry_init_security);
456 int security_dentry_create_files_as(struct dentry *dentry, int mode,
458 const struct cred *old, struct cred *new)
460 return call_int_hook(dentry_create_files_as, 0, dentry, mode,
463 EXPORT_SYMBOL(security_dentry_create_files_as);
465 int security_inode_init_security(struct inode *inode, struct inode *dir,
466 const struct qstr *qstr,
467 const initxattrs initxattrs, void *fs_data)
469 struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
470 struct xattr *lsm_xattr, *evm_xattr, *xattr;
473 if (unlikely(IS_PRIVATE(inode)))
477 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
478 dir, qstr, NULL, NULL, NULL);
479 memset(new_xattrs, 0, sizeof(new_xattrs));
480 lsm_xattr = new_xattrs;
481 ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
484 &lsm_xattr->value_len);
488 evm_xattr = lsm_xattr + 1;
489 ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
492 ret = initxattrs(inode, new_xattrs, fs_data);
494 for (xattr = new_xattrs; xattr->value != NULL; xattr++)
496 return (ret == -EOPNOTSUPP) ? 0 : ret;
498 EXPORT_SYMBOL(security_inode_init_security);
500 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
501 const struct qstr *qstr, const char **name,
502 void **value, size_t *len)
504 if (unlikely(IS_PRIVATE(inode)))
506 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
507 qstr, name, value, len);
509 EXPORT_SYMBOL(security_old_inode_init_security);
511 #ifdef CONFIG_SECURITY_PATH
512 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
515 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
517 return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
519 EXPORT_SYMBOL(security_path_mknod);
521 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
523 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
525 return call_int_hook(path_mkdir, 0, dir, dentry, mode);
527 EXPORT_SYMBOL(security_path_mkdir);
529 int security_path_rmdir(const struct path *dir, struct dentry *dentry)
531 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
533 return call_int_hook(path_rmdir, 0, dir, dentry);
536 int security_path_unlink(const struct path *dir, struct dentry *dentry)
538 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
540 return call_int_hook(path_unlink, 0, dir, dentry);
542 EXPORT_SYMBOL(security_path_unlink);
544 int security_path_symlink(const struct path *dir, struct dentry *dentry,
545 const char *old_name)
547 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
549 return call_int_hook(path_symlink, 0, dir, dentry, old_name);
552 int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
553 struct dentry *new_dentry)
555 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
557 return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
560 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
561 const struct path *new_dir, struct dentry *new_dentry,
564 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
565 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
568 if (flags & RENAME_EXCHANGE) {
569 int err = call_int_hook(path_rename, 0, new_dir, new_dentry,
570 old_dir, old_dentry);
575 return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
578 EXPORT_SYMBOL(security_path_rename);
580 int security_path_truncate(const struct path *path)
582 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
584 return call_int_hook(path_truncate, 0, path);
587 int security_path_chmod(const struct path *path, umode_t mode)
589 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
591 return call_int_hook(path_chmod, 0, path, mode);
594 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
596 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
598 return call_int_hook(path_chown, 0, path, uid, gid);
601 int security_path_chroot(const struct path *path)
603 return call_int_hook(path_chroot, 0, path);
607 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
609 if (unlikely(IS_PRIVATE(dir)))
611 return call_int_hook(inode_create, 0, dir, dentry, mode);
613 EXPORT_SYMBOL_GPL(security_inode_create);
615 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
616 struct dentry *new_dentry)
618 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
620 return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
623 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
625 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
627 return call_int_hook(inode_unlink, 0, dir, dentry);
630 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
631 const char *old_name)
633 if (unlikely(IS_PRIVATE(dir)))
635 return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
638 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
640 if (unlikely(IS_PRIVATE(dir)))
642 return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
644 EXPORT_SYMBOL_GPL(security_inode_mkdir);
646 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
648 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
650 return call_int_hook(inode_rmdir, 0, dir, dentry);
653 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
655 if (unlikely(IS_PRIVATE(dir)))
657 return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
660 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
661 struct inode *new_dir, struct dentry *new_dentry,
664 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
665 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
668 if (flags & RENAME_EXCHANGE) {
669 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
670 old_dir, old_dentry);
675 return call_int_hook(inode_rename, 0, old_dir, old_dentry,
676 new_dir, new_dentry);
679 int security_inode_readlink(struct dentry *dentry)
681 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
683 return call_int_hook(inode_readlink, 0, dentry);
686 int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
689 if (unlikely(IS_PRIVATE(inode)))
691 return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
694 int security_inode_permission(struct inode *inode, int mask)
696 if (unlikely(IS_PRIVATE(inode)))
698 return call_int_hook(inode_permission, 0, inode, mask);
701 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
705 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
707 ret = call_int_hook(inode_setattr, 0, dentry, attr);
710 return evm_inode_setattr(dentry, attr);
712 EXPORT_SYMBOL_GPL(security_inode_setattr);
714 int security_inode_getattr(const struct path *path)
716 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
718 return call_int_hook(inode_getattr, 0, path);
721 int security_inode_setxattr(struct dentry *dentry, const char *name,
722 const void *value, size_t size, int flags)
726 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
729 * SELinux and Smack integrate the cap call,
730 * so assume that all LSMs supplying this call do so.
732 ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size,
736 ret = cap_inode_setxattr(dentry, name, value, size, flags);
739 ret = ima_inode_setxattr(dentry, name, value, size);
742 return evm_inode_setxattr(dentry, name, value, size);
745 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
746 const void *value, size_t size, int flags)
748 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
750 call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
751 evm_inode_post_setxattr(dentry, name, value, size);
754 int security_inode_getxattr(struct dentry *dentry, const char *name)
756 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
758 return call_int_hook(inode_getxattr, 0, dentry, name);
761 int security_inode_listxattr(struct dentry *dentry)
763 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
765 return call_int_hook(inode_listxattr, 0, dentry);
768 int security_inode_removexattr(struct dentry *dentry, const char *name)
772 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
775 * SELinux and Smack integrate the cap call,
776 * so assume that all LSMs supplying this call do so.
778 ret = call_int_hook(inode_removexattr, 1, dentry, name);
780 ret = cap_inode_removexattr(dentry, name);
783 ret = ima_inode_removexattr(dentry, name);
786 return evm_inode_removexattr(dentry, name);
789 int security_inode_need_killpriv(struct dentry *dentry)
791 return call_int_hook(inode_need_killpriv, 0, dentry);
794 int security_inode_killpriv(struct dentry *dentry)
796 return call_int_hook(inode_killpriv, 0, dentry);
799 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc)
801 struct security_hook_list *hp;
804 if (unlikely(IS_PRIVATE(inode)))
807 * Only one module will provide an attribute with a given name.
809 list_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
810 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc);
811 if (rc != -EOPNOTSUPP)
817 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
819 struct security_hook_list *hp;
822 if (unlikely(IS_PRIVATE(inode)))
825 * Only one module will provide an attribute with a given name.
827 list_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
828 rc = hp->hook.inode_setsecurity(inode, name, value, size,
830 if (rc != -EOPNOTSUPP)
836 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
838 if (unlikely(IS_PRIVATE(inode)))
840 return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
842 EXPORT_SYMBOL(security_inode_listsecurity);
844 void security_inode_getsecid(struct inode *inode, u32 *secid)
846 call_void_hook(inode_getsecid, inode, secid);
849 int security_inode_copy_up(struct dentry *src, struct cred **new)
851 return call_int_hook(inode_copy_up, 0, src, new);
853 EXPORT_SYMBOL(security_inode_copy_up);
855 int security_inode_copy_up_xattr(const char *name)
857 return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name);
859 EXPORT_SYMBOL(security_inode_copy_up_xattr);
861 int security_file_permission(struct file *file, int mask)
865 ret = call_int_hook(file_permission, 0, file, mask);
869 return fsnotify_perm(file, mask);
872 int security_file_alloc(struct file *file)
874 return call_int_hook(file_alloc_security, 0, file);
877 void security_file_free(struct file *file)
879 call_void_hook(file_free_security, file);
882 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
884 return call_int_hook(file_ioctl, 0, file, cmd, arg);
887 static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
890 * Does we have PROT_READ and does the application expect
891 * it to imply PROT_EXEC? If not, nothing to talk about...
893 if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
895 if (!(current->personality & READ_IMPLIES_EXEC))
898 * if that's an anonymous mapping, let it.
901 return prot | PROT_EXEC;
903 * ditto if it's not on noexec mount, except that on !MMU we need
904 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
906 if (!path_noexec(&file->f_path)) {
908 if (file->f_op->mmap_capabilities) {
909 unsigned caps = file->f_op->mmap_capabilities(file);
910 if (!(caps & NOMMU_MAP_EXEC))
914 return prot | PROT_EXEC;
916 /* anything on noexec mount won't get PROT_EXEC */
920 int security_mmap_file(struct file *file, unsigned long prot,
924 ret = call_int_hook(mmap_file, 0, file, prot,
925 mmap_prot(file, prot), flags);
928 return ima_file_mmap(file, prot);
931 int security_mmap_addr(unsigned long addr)
933 return call_int_hook(mmap_addr, 0, addr);
936 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
939 return call_int_hook(file_mprotect, 0, vma, reqprot, prot);
942 int security_file_lock(struct file *file, unsigned int cmd)
944 return call_int_hook(file_lock, 0, file, cmd);
947 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
949 return call_int_hook(file_fcntl, 0, file, cmd, arg);
952 void security_file_set_fowner(struct file *file)
954 call_void_hook(file_set_fowner, file);
957 int security_file_send_sigiotask(struct task_struct *tsk,
958 struct fown_struct *fown, int sig)
960 return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
963 int security_file_receive(struct file *file)
965 return call_int_hook(file_receive, 0, file);
968 int security_file_open(struct file *file, const struct cred *cred)
972 ret = call_int_hook(file_open, 0, file, cred);
976 return fsnotify_perm(file, MAY_OPEN);
979 int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
981 return call_int_hook(task_alloc, 0, task, clone_flags);
984 void security_task_free(struct task_struct *task)
986 call_void_hook(task_free, task);
989 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
991 return call_int_hook(cred_alloc_blank, 0, cred, gfp);
994 void security_cred_free(struct cred *cred)
996 call_void_hook(cred_free, cred);
999 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
1001 return call_int_hook(cred_prepare, 0, new, old, gfp);
1004 void security_transfer_creds(struct cred *new, const struct cred *old)
1006 call_void_hook(cred_transfer, new, old);
1009 int security_kernel_act_as(struct cred *new, u32 secid)
1011 return call_int_hook(kernel_act_as, 0, new, secid);
1014 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
1016 return call_int_hook(kernel_create_files_as, 0, new, inode);
1019 int security_kernel_module_request(char *kmod_name)
1021 return call_int_hook(kernel_module_request, 0, kmod_name);
1024 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id)
1028 ret = call_int_hook(kernel_read_file, 0, file, id);
1031 return ima_read_file(file, id);
1033 EXPORT_SYMBOL_GPL(security_kernel_read_file);
1035 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
1036 enum kernel_read_file_id id)
1040 ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
1043 return ima_post_read_file(file, buf, size, id);
1045 EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
1047 int security_task_fix_setuid(struct cred *new, const struct cred *old,
1050 return call_int_hook(task_fix_setuid, 0, new, old, flags);
1053 int security_task_setpgid(struct task_struct *p, pid_t pgid)
1055 return call_int_hook(task_setpgid, 0, p, pgid);
1058 int security_task_getpgid(struct task_struct *p)
1060 return call_int_hook(task_getpgid, 0, p);
1063 int security_task_getsid(struct task_struct *p)
1065 return call_int_hook(task_getsid, 0, p);
1068 void security_task_getsecid(struct task_struct *p, u32 *secid)
1071 call_void_hook(task_getsecid, p, secid);
1073 EXPORT_SYMBOL(security_task_getsecid);
1075 int security_task_setnice(struct task_struct *p, int nice)
1077 return call_int_hook(task_setnice, 0, p, nice);
1080 int security_task_setioprio(struct task_struct *p, int ioprio)
1082 return call_int_hook(task_setioprio, 0, p, ioprio);
1085 int security_task_getioprio(struct task_struct *p)
1087 return call_int_hook(task_getioprio, 0, p);
1090 int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
1093 return call_int_hook(task_prlimit, 0, cred, tcred, flags);
1096 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
1097 struct rlimit *new_rlim)
1099 return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1102 int security_task_setscheduler(struct task_struct *p)
1104 return call_int_hook(task_setscheduler, 0, p);
1107 int security_task_getscheduler(struct task_struct *p)
1109 return call_int_hook(task_getscheduler, 0, p);
1112 int security_task_movememory(struct task_struct *p)
1114 return call_int_hook(task_movememory, 0, p);
1117 int security_task_kill(struct task_struct *p, struct siginfo *info,
1120 return call_int_hook(task_kill, 0, p, info, sig, secid);
1123 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1124 unsigned long arg4, unsigned long arg5)
1128 struct security_hook_list *hp;
1130 list_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
1131 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
1132 if (thisrc != -ENOSYS) {
1141 void security_task_to_inode(struct task_struct *p, struct inode *inode)
1143 call_void_hook(task_to_inode, p, inode);
1146 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
1148 return call_int_hook(ipc_permission, 0, ipcp, flag);
1151 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
1154 call_void_hook(ipc_getsecid, ipcp, secid);
1157 int security_msg_msg_alloc(struct msg_msg *msg)
1159 return call_int_hook(msg_msg_alloc_security, 0, msg);
1162 void security_msg_msg_free(struct msg_msg *msg)
1164 call_void_hook(msg_msg_free_security, msg);
1167 int security_msg_queue_alloc(struct msg_queue *msq)
1169 return call_int_hook(msg_queue_alloc_security, 0, msq);
1172 void security_msg_queue_free(struct msg_queue *msq)
1174 call_void_hook(msg_queue_free_security, msq);
1177 int security_msg_queue_associate(struct msg_queue *msq, int msqflg)
1179 return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1182 int security_msg_queue_msgctl(struct msg_queue *msq, int cmd)
1184 return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1187 int security_msg_queue_msgsnd(struct msg_queue *msq,
1188 struct msg_msg *msg, int msqflg)
1190 return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1193 int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
1194 struct task_struct *target, long type, int mode)
1196 return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1199 int security_shm_alloc(struct shmid_kernel *shp)
1201 return call_int_hook(shm_alloc_security, 0, shp);
1204 void security_shm_free(struct shmid_kernel *shp)
1206 call_void_hook(shm_free_security, shp);
1209 int security_shm_associate(struct shmid_kernel *shp, int shmflg)
1211 return call_int_hook(shm_associate, 0, shp, shmflg);
1214 int security_shm_shmctl(struct shmid_kernel *shp, int cmd)
1216 return call_int_hook(shm_shmctl, 0, shp, cmd);
1219 int security_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr, int shmflg)
1221 return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
1224 int security_sem_alloc(struct sem_array *sma)
1226 return call_int_hook(sem_alloc_security, 0, sma);
1229 void security_sem_free(struct sem_array *sma)
1231 call_void_hook(sem_free_security, sma);
1234 int security_sem_associate(struct sem_array *sma, int semflg)
1236 return call_int_hook(sem_associate, 0, sma, semflg);
1239 int security_sem_semctl(struct sem_array *sma, int cmd)
1241 return call_int_hook(sem_semctl, 0, sma, cmd);
1244 int security_sem_semop(struct sem_array *sma, struct sembuf *sops,
1245 unsigned nsops, int alter)
1247 return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
1250 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1252 if (unlikely(inode && IS_PRIVATE(inode)))
1254 call_void_hook(d_instantiate, dentry, inode);
1256 EXPORT_SYMBOL(security_d_instantiate);
1258 int security_getprocattr(struct task_struct *p, char *name, char **value)
1260 return call_int_hook(getprocattr, -EINVAL, p, name, value);
1263 int security_setprocattr(const char *name, void *value, size_t size)
1265 return call_int_hook(setprocattr, -EINVAL, name, value, size);
1268 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1270 return call_int_hook(netlink_send, 0, sk, skb);
1273 int security_ismaclabel(const char *name)
1275 return call_int_hook(ismaclabel, 0, name);
1277 EXPORT_SYMBOL(security_ismaclabel);
1279 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1281 return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
1284 EXPORT_SYMBOL(security_secid_to_secctx);
1286 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1289 return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
1291 EXPORT_SYMBOL(security_secctx_to_secid);
1293 void security_release_secctx(char *secdata, u32 seclen)
1295 call_void_hook(release_secctx, secdata, seclen);
1297 EXPORT_SYMBOL(security_release_secctx);
1299 void security_inode_invalidate_secctx(struct inode *inode)
1301 call_void_hook(inode_invalidate_secctx, inode);
1303 EXPORT_SYMBOL(security_inode_invalidate_secctx);
1305 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1307 return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
1309 EXPORT_SYMBOL(security_inode_notifysecctx);
1311 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1313 return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
1315 EXPORT_SYMBOL(security_inode_setsecctx);
1317 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1319 return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
1321 EXPORT_SYMBOL(security_inode_getsecctx);
1323 #ifdef CONFIG_SECURITY_NETWORK
1325 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1327 return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
1329 EXPORT_SYMBOL(security_unix_stream_connect);
1331 int security_unix_may_send(struct socket *sock, struct socket *other)
1333 return call_int_hook(unix_may_send, 0, sock, other);
1335 EXPORT_SYMBOL(security_unix_may_send);
1337 int security_socket_create(int family, int type, int protocol, int kern)
1339 return call_int_hook(socket_create, 0, family, type, protocol, kern);
1342 int security_socket_post_create(struct socket *sock, int family,
1343 int type, int protocol, int kern)
1345 return call_int_hook(socket_post_create, 0, sock, family, type,
1349 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
1351 return call_int_hook(socket_bind, 0, sock, address, addrlen);
1354 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
1356 return call_int_hook(socket_connect, 0, sock, address, addrlen);
1359 int security_socket_listen(struct socket *sock, int backlog)
1361 return call_int_hook(socket_listen, 0, sock, backlog);
1364 int security_socket_accept(struct socket *sock, struct socket *newsock)
1366 return call_int_hook(socket_accept, 0, sock, newsock);
1369 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
1371 return call_int_hook(socket_sendmsg, 0, sock, msg, size);
1374 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
1375 int size, int flags)
1377 return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
1380 int security_socket_getsockname(struct socket *sock)
1382 return call_int_hook(socket_getsockname, 0, sock);
1385 int security_socket_getpeername(struct socket *sock)
1387 return call_int_hook(socket_getpeername, 0, sock);
1390 int security_socket_getsockopt(struct socket *sock, int level, int optname)
1392 return call_int_hook(socket_getsockopt, 0, sock, level, optname);
1395 int security_socket_setsockopt(struct socket *sock, int level, int optname)
1397 return call_int_hook(socket_setsockopt, 0, sock, level, optname);
1400 int security_socket_shutdown(struct socket *sock, int how)
1402 return call_int_hook(socket_shutdown, 0, sock, how);
1405 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
1407 return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
1409 EXPORT_SYMBOL(security_sock_rcv_skb);
1411 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
1412 int __user *optlen, unsigned len)
1414 return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
1415 optval, optlen, len);
1418 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
1420 return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
1423 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
1425 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
1427 return call_int_hook(sk_alloc_security, 0, sk, family, priority);
1430 void security_sk_free(struct sock *sk)
1432 call_void_hook(sk_free_security, sk);
1435 void security_sk_clone(const struct sock *sk, struct sock *newsk)
1437 call_void_hook(sk_clone_security, sk, newsk);
1439 EXPORT_SYMBOL(security_sk_clone);
1441 void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
1443 call_void_hook(sk_getsecid, sk, &fl->flowi_secid);
1445 EXPORT_SYMBOL(security_sk_classify_flow);
1447 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
1449 call_void_hook(req_classify_flow, req, fl);
1451 EXPORT_SYMBOL(security_req_classify_flow);
1453 void security_sock_graft(struct sock *sk, struct socket *parent)
1455 call_void_hook(sock_graft, sk, parent);
1457 EXPORT_SYMBOL(security_sock_graft);
1459 int security_inet_conn_request(struct sock *sk,
1460 struct sk_buff *skb, struct request_sock *req)
1462 return call_int_hook(inet_conn_request, 0, sk, skb, req);
1464 EXPORT_SYMBOL(security_inet_conn_request);
1466 void security_inet_csk_clone(struct sock *newsk,
1467 const struct request_sock *req)
1469 call_void_hook(inet_csk_clone, newsk, req);
1472 void security_inet_conn_established(struct sock *sk,
1473 struct sk_buff *skb)
1475 call_void_hook(inet_conn_established, sk, skb);
1478 int security_secmark_relabel_packet(u32 secid)
1480 return call_int_hook(secmark_relabel_packet, 0, secid);
1482 EXPORT_SYMBOL(security_secmark_relabel_packet);
1484 void security_secmark_refcount_inc(void)
1486 call_void_hook(secmark_refcount_inc);
1488 EXPORT_SYMBOL(security_secmark_refcount_inc);
1490 void security_secmark_refcount_dec(void)
1492 call_void_hook(secmark_refcount_dec);
1494 EXPORT_SYMBOL(security_secmark_refcount_dec);
1496 int security_tun_dev_alloc_security(void **security)
1498 return call_int_hook(tun_dev_alloc_security, 0, security);
1500 EXPORT_SYMBOL(security_tun_dev_alloc_security);
1502 void security_tun_dev_free_security(void *security)
1504 call_void_hook(tun_dev_free_security, security);
1506 EXPORT_SYMBOL(security_tun_dev_free_security);
1508 int security_tun_dev_create(void)
1510 return call_int_hook(tun_dev_create, 0);
1512 EXPORT_SYMBOL(security_tun_dev_create);
1514 int security_tun_dev_attach_queue(void *security)
1516 return call_int_hook(tun_dev_attach_queue, 0, security);
1518 EXPORT_SYMBOL(security_tun_dev_attach_queue);
1520 int security_tun_dev_attach(struct sock *sk, void *security)
1522 return call_int_hook(tun_dev_attach, 0, sk, security);
1524 EXPORT_SYMBOL(security_tun_dev_attach);
1526 int security_tun_dev_open(void *security)
1528 return call_int_hook(tun_dev_open, 0, security);
1530 EXPORT_SYMBOL(security_tun_dev_open);
1532 #endif /* CONFIG_SECURITY_NETWORK */
1534 #ifdef CONFIG_SECURITY_INFINIBAND
1536 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey)
1538 return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey);
1540 EXPORT_SYMBOL(security_ib_pkey_access);
1542 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num)
1544 return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num);
1546 EXPORT_SYMBOL(security_ib_endport_manage_subnet);
1548 int security_ib_alloc_security(void **sec)
1550 return call_int_hook(ib_alloc_security, 0, sec);
1552 EXPORT_SYMBOL(security_ib_alloc_security);
1554 void security_ib_free_security(void *sec)
1556 call_void_hook(ib_free_security, sec);
1558 EXPORT_SYMBOL(security_ib_free_security);
1559 #endif /* CONFIG_SECURITY_INFINIBAND */
1561 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1563 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
1564 struct xfrm_user_sec_ctx *sec_ctx,
1567 return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
1569 EXPORT_SYMBOL(security_xfrm_policy_alloc);
1571 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
1572 struct xfrm_sec_ctx **new_ctxp)
1574 return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
1577 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
1579 call_void_hook(xfrm_policy_free_security, ctx);
1581 EXPORT_SYMBOL(security_xfrm_policy_free);
1583 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
1585 return call_int_hook(xfrm_policy_delete_security, 0, ctx);
1588 int security_xfrm_state_alloc(struct xfrm_state *x,
1589 struct xfrm_user_sec_ctx *sec_ctx)
1591 return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
1593 EXPORT_SYMBOL(security_xfrm_state_alloc);
1595 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
1596 struct xfrm_sec_ctx *polsec, u32 secid)
1598 return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
1601 int security_xfrm_state_delete(struct xfrm_state *x)
1603 return call_int_hook(xfrm_state_delete_security, 0, x);
1605 EXPORT_SYMBOL(security_xfrm_state_delete);
1607 void security_xfrm_state_free(struct xfrm_state *x)
1609 call_void_hook(xfrm_state_free_security, x);
1612 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
1614 return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
1617 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
1618 struct xfrm_policy *xp,
1619 const struct flowi *fl)
1621 struct security_hook_list *hp;
1625 * Since this function is expected to return 0 or 1, the judgment
1626 * becomes difficult if multiple LSMs supply this call. Fortunately,
1627 * we can use the first LSM's judgment because currently only SELinux
1628 * supplies this call.
1630 * For speed optimization, we explicitly break the loop rather than
1633 list_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
1635 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl);
1641 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
1643 return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
1646 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
1648 int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid,
1653 EXPORT_SYMBOL(security_skb_classify_flow);
1655 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
1659 int security_key_alloc(struct key *key, const struct cred *cred,
1660 unsigned long flags)
1662 return call_int_hook(key_alloc, 0, key, cred, flags);
1665 void security_key_free(struct key *key)
1667 call_void_hook(key_free, key);
1670 int security_key_permission(key_ref_t key_ref,
1671 const struct cred *cred, unsigned perm)
1673 return call_int_hook(key_permission, 0, key_ref, cred, perm);
1676 int security_key_getsecurity(struct key *key, char **_buffer)
1679 return call_int_hook(key_getsecurity, 0, key, _buffer);
1682 #endif /* CONFIG_KEYS */
1686 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
1688 return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
1691 int security_audit_rule_known(struct audit_krule *krule)
1693 return call_int_hook(audit_rule_known, 0, krule);
1696 void security_audit_rule_free(void *lsmrule)
1698 call_void_hook(audit_rule_free, lsmrule);
1701 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
1702 struct audit_context *actx)
1704 return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule,
1707 #endif /* CONFIG_AUDIT */