security.c 42.7 KB
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/*
 * Security plug functions
 *
 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
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 * Copyright (C) 2016 Mellanox Technologies
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 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 */

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#include <linux/capability.h>
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#include <linux/dcache.h>
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#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
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#include <linux/lsm_hooks.h>
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#include <linux/integrity.h>
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#include <linux/ima.h>
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#include <linux/evm.h>
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#include <linux/fsnotify.h>
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#include <linux/mman.h>
#include <linux/mount.h>
#include <linux/personality.h>
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#include <linux/backing-dev.h>
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#include <linux/string.h>
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#include <net/flow.h>
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#define MAX_LSM_EVM_XATTR	2
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/* Maximum number of letters for an LSM name string */
#define SECURITY_NAME_MAX	10

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struct security_hook_heads security_hook_heads __lsm_ro_after_init;
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static ATOMIC_NOTIFIER_HEAD(lsm_notifier_chain);

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char *lsm_names;
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/* Boot-time LSM user choice */
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static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] =
	CONFIG_DEFAULT_SECURITY;
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static void __init do_security_initcalls(void)
{
	initcall_t *call;
	call = __security_initcall_start;
	while (call < __security_initcall_end) {
		(*call) ();
		call++;
	}
}

/**
 * security_init - initializes the security framework
 *
 * This should be called early in the kernel initialization sequence.
 */
int __init security_init(void)
{
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	int i;
	struct list_head *list = (struct list_head *) &security_hook_heads;

	for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct list_head);
	     i++)
		INIT_LIST_HEAD(&list[i]);
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	pr_info("Security Framework initialized\n");
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	/*
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	 * Load minor LSMs, with the capability module always first.
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	 */
	capability_add_hooks();
	yama_add_hooks();
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	loadpin_add_hooks();
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	/*
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	 * Load all the remaining security modules.
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	 */
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	do_security_initcalls();

	return 0;
}

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/* Save user chosen LSM */
static int __init choose_lsm(char *str)
{
	strncpy(chosen_lsm, str, SECURITY_NAME_MAX);
	return 1;
}
__setup("security=", choose_lsm);

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static bool match_last_lsm(const char *list, const char *lsm)
{
	const char *last;

	if (WARN_ON(!list || !lsm))
		return false;
	last = strrchr(list, ',');
	if (last)
		/* Pass the comma, strcmp() will check for '\0' */
		last++;
	else
		last = list;
	return !strcmp(last, lsm);
}

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static int lsm_append(char *new, char **result)
{
	char *cp;

	if (*result == NULL) {
		*result = kstrdup(new, GFP_KERNEL);
	} else {
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		/* Check if it is the last registered name */
		if (match_last_lsm(*result, new))
			return 0;
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		cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
		if (cp == NULL)
			return -ENOMEM;
		kfree(*result);
		*result = cp;
	}
	return 0;
}

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/**
 * security_module_enable - Load given security module on boot ?
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 * @module: the name of the module
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 *
 * Each LSM must pass this method before registering its own operations
 * to avoid security registration races. This method may also be used
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 * to check if your LSM is currently loaded during kernel initialization.
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 *
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 * Returns:
 *
 * true if:
 *
 * - The passed LSM is the one chosen by user at boot time,
 * - or the passed LSM is configured as the default and the user did not
 *   choose an alternate LSM at boot time.
 *
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 * Otherwise, return false.
 */
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int __init security_module_enable(const char *module)
146
{
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	return !strcmp(module, chosen_lsm);
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}

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/**
 * security_add_hooks - Add a modules hooks to the hook lists.
 * @hooks: the hooks to add
 * @count: the number of hooks to add
 * @lsm: the name of the security module
 *
 * Each LSM has to register its hooks with the infrastructure.
 */
void __init security_add_hooks(struct security_hook_list *hooks, int count,
				char *lsm)
{
	int i;

	for (i = 0; i < count; i++) {
		hooks[i].lsm = lsm;
		list_add_tail_rcu(&hooks[i].list, hooks[i].head);
	}
	if (lsm_append(lsm, &lsm_names) < 0)
		panic("%s - Cannot get early memory.\n", __func__);
}

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int call_lsm_notifier(enum lsm_event event, void *data)
{
	return atomic_notifier_call_chain(&lsm_notifier_chain, event, data);
}
EXPORT_SYMBOL(call_lsm_notifier);

int register_lsm_notifier(struct notifier_block *nb)
{
	return atomic_notifier_chain_register(&lsm_notifier_chain, nb);
}
EXPORT_SYMBOL(register_lsm_notifier);

int unregister_lsm_notifier(struct notifier_block *nb)
{
	return atomic_notifier_chain_unregister(&lsm_notifier_chain, nb);
}
EXPORT_SYMBOL(unregister_lsm_notifier);

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/*
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 * Hook list operation macros.
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 *
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 * call_void_hook:
 *	This is a hook that does not return a value.
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 *
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 * call_int_hook:
 *	This is a hook that returns a value.
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 */

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#define call_void_hook(FUNC, ...)				\
	do {							\
		struct security_hook_list *P;			\
								\
		list_for_each_entry(P, &security_hook_heads.FUNC, list)	\
			P->hook.FUNC(__VA_ARGS__);		\
	} while (0)

#define call_int_hook(FUNC, IRC, ...) ({			\
	int RC = IRC;						\
	do {							\
		struct security_hook_list *P;			\
								\
		list_for_each_entry(P, &security_hook_heads.FUNC, list) { \
			RC = P->hook.FUNC(__VA_ARGS__);		\
			if (RC != 0)				\
				break;				\
		}						\
	} while (0);						\
	RC;							\
})
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/* Security operations */

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int security_binder_set_context_mgr(struct task_struct *mgr)
{
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	return call_int_hook(binder_set_context_mgr, 0, mgr);
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}

int security_binder_transaction(struct task_struct *from,
				struct task_struct *to)
{
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	return call_int_hook(binder_transaction, 0, from, to);
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}

int security_binder_transfer_binder(struct task_struct *from,
				    struct task_struct *to)
{
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	return call_int_hook(binder_transfer_binder, 0, from, to);
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}

int security_binder_transfer_file(struct task_struct *from,
				  struct task_struct *to, struct file *file)
{
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	return call_int_hook(binder_transfer_file, 0, from, to, file);
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}

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int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
247
{
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	return call_int_hook(ptrace_access_check, 0, child, mode);
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}

int security_ptrace_traceme(struct task_struct *parent)
{
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	return call_int_hook(ptrace_traceme, 0, parent);
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}

int security_capget(struct task_struct *target,
		     kernel_cap_t *effective,
		     kernel_cap_t *inheritable,
		     kernel_cap_t *permitted)
{
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	return call_int_hook(capget, 0, target,
				effective, inheritable, permitted);
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}

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int security_capset(struct cred *new, const struct cred *old,
		    const kernel_cap_t *effective,
		    const kernel_cap_t *inheritable,
		    const kernel_cap_t *permitted)
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{
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	return call_int_hook(capset, 0, new, old,
				effective, inheritable, permitted);
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}

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int security_capable(const struct cred *cred, struct user_namespace *ns,
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		     int cap)
276
{
277
	return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_AUDIT);
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}

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int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns,
			     int cap)
282
{
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	return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_NOAUDIT);
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}

int security_quotactl(int cmds, int type, int id, struct super_block *sb)
{
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	return call_int_hook(quotactl, 0, cmds, type, id, sb);
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}

int security_quota_on(struct dentry *dentry)
{
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	return call_int_hook(quota_on, 0, dentry);
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}

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int security_syslog(int type)
297
{
298
	return call_int_hook(syslog, 0, type);
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}

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int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
302
{
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	return call_int_hook(settime, 0, ts, tz);
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}

int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
{
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	struct security_hook_list *hp;
	int cap_sys_admin = 1;
	int rc;

	/*
	 * The module will respond with a positive value if
	 * it thinks the __vm_enough_memory() call should be
	 * made with the cap_sys_admin set. If all of the modules
	 * agree that it should be set it will. If any module
	 * thinks it should not be set it won't.
	 */
	list_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
		rc = hp->hook.vm_enough_memory(mm, pages);
		if (rc <= 0) {
			cap_sys_admin = 0;
			break;
		}
	}
	return __vm_enough_memory(mm, pages, cap_sys_admin);
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}

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int security_bprm_set_creds(struct linux_binprm *bprm)
330
{
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	return call_int_hook(bprm_set_creds, 0, bprm);
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}

334
int security_bprm_check(struct linux_binprm *bprm)
335
{
336 337
	int ret;

338
	ret = call_int_hook(bprm_check_security, 0, bprm);
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	if (ret)
		return ret;
	return ima_bprm_check(bprm);
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}

344
void security_bprm_committing_creds(struct linux_binprm *bprm)
345
{
346
	call_void_hook(bprm_committing_creds, bprm);
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}

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void security_bprm_committed_creds(struct linux_binprm *bprm)
350
{
351
	call_void_hook(bprm_committed_creds, bprm);
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}

int security_sb_alloc(struct super_block *sb)
{
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	return call_int_hook(sb_alloc_security, 0, sb);
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}

void security_sb_free(struct super_block *sb)
{
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	call_void_hook(sb_free_security, sb);
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}

364
int security_sb_copy_data(char *orig, char *copy)
365
{
366
	return call_int_hook(sb_copy_data, 0, orig, copy);
367
}
368
EXPORT_SYMBOL(security_sb_copy_data);
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int security_sb_remount(struct super_block *sb, void *data)
{
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	return call_int_hook(sb_remount, 0, sb, data);
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}

375
int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
376
{
377
	return call_int_hook(sb_kern_mount, 0, sb, flags, data);
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}

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int security_sb_show_options(struct seq_file *m, struct super_block *sb)
{
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	return call_int_hook(sb_show_options, 0, m, sb);
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}

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int security_sb_statfs(struct dentry *dentry)
{
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	return call_int_hook(sb_statfs, 0, dentry);
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}

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int security_sb_mount(const char *dev_name, const struct path *path,
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                       const char *type, unsigned long flags, void *data)
392
{
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	return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
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}

int security_sb_umount(struct vfsmount *mnt, int flags)
{
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	return call_int_hook(sb_umount, 0, mnt, flags);
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}

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int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
402
{
403
	return call_int_hook(sb_pivotroot, 0, old_path, new_path);
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}

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int security_sb_set_mnt_opts(struct super_block *sb,
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				struct security_mnt_opts *opts,
				unsigned long kern_flags,
				unsigned long *set_kern_flags)
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{
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	return call_int_hook(sb_set_mnt_opts,
				opts->num_mnt_opts ? -EOPNOTSUPP : 0, sb,
				opts, kern_flags, set_kern_flags);
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}
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EXPORT_SYMBOL(security_sb_set_mnt_opts);
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int security_sb_clone_mnt_opts(const struct super_block *oldsb,
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				struct super_block *newsb,
				unsigned long kern_flags,
				unsigned long *set_kern_flags)
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{
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	return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb,
				kern_flags, set_kern_flags);
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}
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EXPORT_SYMBOL(security_sb_clone_mnt_opts);

int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
{
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	return call_int_hook(sb_parse_opts_str, 0, options, opts);
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}
EXPORT_SYMBOL(security_sb_parse_opts_str);
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int security_inode_alloc(struct inode *inode)
{
	inode->i_security = NULL;
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	return call_int_hook(inode_alloc_security, 0, inode);
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}

void security_inode_free(struct inode *inode)
{
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	integrity_inode_free(inode);
442
	call_void_hook(inode_free_security, inode);
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}

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int security_dentry_init_security(struct dentry *dentry, int mode,
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					const struct qstr *name, void **ctx,
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					u32 *ctxlen)
{
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	return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
				name, ctx, ctxlen);
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}
EXPORT_SYMBOL(security_dentry_init_security);

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int security_dentry_create_files_as(struct dentry *dentry, int mode,
				    struct qstr *name,
				    const struct cred *old, struct cred *new)
{
	return call_int_hook(dentry_create_files_as, 0, dentry, mode,
				name, old, new);
}
EXPORT_SYMBOL(security_dentry_create_files_as);

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int security_inode_init_security(struct inode *inode, struct inode *dir,
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				 const struct qstr *qstr,
				 const initxattrs initxattrs, void *fs_data)
466
{
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	struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
	struct xattr *lsm_xattr, *evm_xattr, *xattr;
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	int ret;

471
	if (unlikely(IS_PRIVATE(inode)))
472
		return 0;
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	if (!initxattrs)
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		return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
				     dir, qstr, NULL, NULL, NULL);
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	memset(new_xattrs, 0, sizeof(new_xattrs));
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	lsm_xattr = new_xattrs;
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	ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
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						&lsm_xattr->name,
						&lsm_xattr->value,
						&lsm_xattr->value_len);
	if (ret)
		goto out;
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	evm_xattr = lsm_xattr + 1;
	ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
	if (ret)
		goto out;
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	ret = initxattrs(inode, new_xattrs, fs_data);
out:
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	for (xattr = new_xattrs; xattr->value != NULL; xattr++)
493
		kfree(xattr->value);
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	return (ret == -EOPNOTSUPP) ? 0 : ret;
}
EXPORT_SYMBOL(security_inode_init_security);

int security_old_inode_init_security(struct inode *inode, struct inode *dir,
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				     const struct qstr *qstr, const char **name,
500
				     void **value, size_t *len)
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{
	if (unlikely(IS_PRIVATE(inode)))
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		return -EOPNOTSUPP;
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	return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
			     qstr, name, value, len);
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}
507
EXPORT_SYMBOL(security_old_inode_init_security);
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509
#ifdef CONFIG_SECURITY_PATH
510
int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
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			unsigned int dev)
{
513
	if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
514
		return 0;
515
	return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
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}
EXPORT_SYMBOL(security_path_mknod);

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int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
520
{
521
	if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
522
		return 0;
523
	return call_int_hook(path_mkdir, 0, dir, dentry, mode);
524
}
525
EXPORT_SYMBOL(security_path_mkdir);
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int security_path_rmdir(const struct path *dir, struct dentry *dentry)
528
{
529
	if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
530
		return 0;
531
	return call_int_hook(path_rmdir, 0, dir, dentry);
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}

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int security_path_unlink(const struct path *dir, struct dentry *dentry)
535
{
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	if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
537
		return 0;
538
	return call_int_hook(path_unlink, 0, dir, dentry);
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}
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EXPORT_SYMBOL(security_path_unlink);
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542
int security_path_symlink(const struct path *dir, struct dentry *dentry,
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			  const char *old_name)
{
545
	if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
546
		return 0;
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	return call_int_hook(path_symlink, 0, dir, dentry, old_name);
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}

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int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
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		       struct dentry *new_dentry)
{
553
	if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
554
		return 0;
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	return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
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}

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int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
			 const struct path *new_dir, struct dentry *new_dentry,
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			 unsigned int flags)
561
{
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	if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
		     (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
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		return 0;
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	if (flags & RENAME_EXCHANGE) {
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		int err = call_int_hook(path_rename, 0, new_dir, new_dentry,
					old_dir, old_dentry);
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		if (err)
			return err;
	}

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	return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
				new_dentry);
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}
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EXPORT_SYMBOL(security_path_rename);
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int security_path_truncate(const struct path *path)
579
{
580
	if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
581
		return 0;
582
	return call_int_hook(path_truncate, 0, path);
583
}
584

585
int security_path_chmod(const struct path *path, umode_t mode)
586
{
587
	if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
588
		return 0;
589
	return call_int_hook(path_chmod, 0, path, mode);
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}

592
int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
593
{
594
	if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
595
		return 0;
596
	return call_int_hook(path_chown, 0, path, uid, gid);
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}
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598

A
Al Viro 已提交
599
int security_path_chroot(const struct path *path)
T
Tetsuo Handa 已提交
600
{
601
	return call_int_hook(path_chroot, 0, path);
T
Tetsuo Handa 已提交
602
}
603 604
#endif

A
Al Viro 已提交
605
int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
606 607 608
{
	if (unlikely(IS_PRIVATE(dir)))
		return 0;
609
	return call_int_hook(inode_create, 0, dir, dentry, mode);
610
}
611
EXPORT_SYMBOL_GPL(security_inode_create);
612 613 614 615

int security_inode_link(struct dentry *old_dentry, struct inode *dir,
			 struct dentry *new_dentry)
{
616
	if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
617
		return 0;
618
	return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
619 620 621 622
}

int security_inode_unlink(struct inode *dir, struct dentry *dentry)
{
623
	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
624
		return 0;
625
	return call_int_hook(inode_unlink, 0, dir, dentry);
626 627 628 629 630 631 632
}

int security_inode_symlink(struct inode *dir, struct dentry *dentry,
			    const char *old_name)
{
	if (unlikely(IS_PRIVATE(dir)))
		return 0;
633
	return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
634 635
}

636
int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
637 638 639
{
	if (unlikely(IS_PRIVATE(dir)))
		return 0;
640
	return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
641
}
642
EXPORT_SYMBOL_GPL(security_inode_mkdir);
643 644 645

int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
{
646
	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
647
		return 0;
648
	return call_int_hook(inode_rmdir, 0, dir, dentry);
649 650
}

A
Al Viro 已提交
651
int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
652 653 654
{
	if (unlikely(IS_PRIVATE(dir)))
		return 0;
655
	return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
656 657 658
}

int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
659 660
			   struct inode *new_dir, struct dentry *new_dentry,
			   unsigned int flags)
661
{
662 663
        if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
            (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
664
		return 0;
M
Miklos Szeredi 已提交
665 666

	if (flags & RENAME_EXCHANGE) {
667
		int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
M
Miklos Szeredi 已提交
668 669 670 671 672
						     old_dir, old_dentry);
		if (err)
			return err;
	}

673
	return call_int_hook(inode_rename, 0, old_dir, old_dentry,
674 675 676 677 678
					   new_dir, new_dentry);
}

int security_inode_readlink(struct dentry *dentry)
{
679
	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
680
		return 0;
681
	return call_int_hook(inode_readlink, 0, dentry);
682 683
}

684 685
int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
			       bool rcu)
686
{
687
	if (unlikely(IS_PRIVATE(inode)))
688
		return 0;
689
	return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
690 691
}

692
int security_inode_permission(struct inode *inode, int mask)
693 694 695
{
	if (unlikely(IS_PRIVATE(inode)))
		return 0;
696
	return call_int_hook(inode_permission, 0, inode, mask);
697 698 699 700
}

int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
{
701 702
	int ret;

703
	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
704
		return 0;
705
	ret = call_int_hook(inode_setattr, 0, dentry, attr);
706 707 708
	if (ret)
		return ret;
	return evm_inode_setattr(dentry, attr);
709
}
710
EXPORT_SYMBOL_GPL(security_inode_setattr);
711

712
int security_inode_getattr(const struct path *path)
713
{
714
	if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
715
		return 0;
716
	return call_int_hook(inode_getattr, 0, path);
717 718
}

719 720
int security_inode_setxattr(struct dentry *dentry, const char *name,
			    const void *value, size_t size, int flags)
721
{
722 723
	int ret;

724
	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
725
		return 0;
C
Casey Schaufler 已提交
726 727 728 729 730
	/*
	 * SELinux and Smack integrate the cap call,
	 * so assume that all LSMs supplying this call do so.
	 */
	ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size,
731
				flags);
C
Casey Schaufler 已提交
732 733 734

	if (ret == 1)
		ret = cap_inode_setxattr(dentry, name, value, size, flags);
735 736 737
	if (ret)
		return ret;
	ret = ima_inode_setxattr(dentry, name, value, size);
738 739 740
	if (ret)
		return ret;
	return evm_inode_setxattr(dentry, name, value, size);
741 742
}

743 744
void security_inode_post_setxattr(struct dentry *dentry, const char *name,
				  const void *value, size_t size, int flags)
745
{
746
	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
747
		return;
748
	call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
749
	evm_inode_post_setxattr(dentry, name, value, size);
750 751
}

752
int security_inode_getxattr(struct dentry *dentry, const char *name)
753
{
754
	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
755
		return 0;
756
	return call_int_hook(inode_getxattr, 0, dentry, name);
757 758 759 760
}

int security_inode_listxattr(struct dentry *dentry)
{
761
	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
762
		return 0;
763
	return call_int_hook(inode_listxattr, 0, dentry);
764 765
}

766
int security_inode_removexattr(struct dentry *dentry, const char *name)
767
{
768 769
	int ret;

770
	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
771
		return 0;
C
Casey Schaufler 已提交
772 773 774 775 776 777 778
	/*
	 * SELinux and Smack integrate the cap call,
	 * so assume that all LSMs supplying this call do so.
	 */
	ret = call_int_hook(inode_removexattr, 1, dentry, name);
	if (ret == 1)
		ret = cap_inode_removexattr(dentry, name);
779 780 781
	if (ret)
		return ret;
	ret = ima_inode_removexattr(dentry, name);
782 783 784
	if (ret)
		return ret;
	return evm_inode_removexattr(dentry, name);
785 786
}

787 788
int security_inode_need_killpriv(struct dentry *dentry)
{
789
	return call_int_hook(inode_need_killpriv, 0, dentry);
790 791 792 793
}

int security_inode_killpriv(struct dentry *dentry)
{
794
	return call_int_hook(inode_killpriv, 0, dentry);
795 796
}

797
int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc)
798
{
799 800 801
	struct security_hook_list *hp;
	int rc;

802
	if (unlikely(IS_PRIVATE(inode)))
803
		return -EOPNOTSUPP;
804 805 806 807 808 809 810 811 812
	/*
	 * Only one module will provide an attribute with a given name.
	 */
	list_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
		rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc);
		if (rc != -EOPNOTSUPP)
			return rc;
	}
	return -EOPNOTSUPP;
813 814 815 816
}

int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
{
817 818 819
	struct security_hook_list *hp;
	int rc;

820
	if (unlikely(IS_PRIVATE(inode)))
821
		return -EOPNOTSUPP;
822 823 824 825 826 827 828 829 830 831
	/*
	 * Only one module will provide an attribute with a given name.
	 */
	list_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
		rc = hp->hook.inode_setsecurity(inode, name, value, size,
								flags);
		if (rc != -EOPNOTSUPP)
			return rc;
	}
	return -EOPNOTSUPP;
832 833 834 835 836 837
}

int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
{
	if (unlikely(IS_PRIVATE(inode)))
		return 0;
838
	return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
839
}
840
EXPORT_SYMBOL(security_inode_listsecurity);
841

842
void security_inode_getsecid(struct inode *inode, u32 *secid)
843
{
844
	call_void_hook(inode_getsecid, inode, secid);
845 846
}

847 848 849 850 851 852
int security_inode_copy_up(struct dentry *src, struct cred **new)
{
	return call_int_hook(inode_copy_up, 0, src, new);
}
EXPORT_SYMBOL(security_inode_copy_up);

853 854 855 856 857 858
int security_inode_copy_up_xattr(const char *name)
{
	return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name);
}
EXPORT_SYMBOL(security_inode_copy_up_xattr);

859 860
int security_file_permission(struct file *file, int mask)
{
861 862
	int ret;

863
	ret = call_int_hook(file_permission, 0, file, mask);
864 865 866 867
	if (ret)
		return ret;

	return fsnotify_perm(file, mask);
868 869 870 871
}

int security_file_alloc(struct file *file)
{
872
	return call_int_hook(file_alloc_security, 0, file);
873 874 875 876
}

void security_file_free(struct file *file)
{
877
	call_void_hook(file_free_security, file);
878 879 880 881
}

int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
882
	return call_int_hook(file_ioctl, 0, file, cmd, arg);
883 884
}

885
static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
886
{
887
	/*
888 889
	 * Does we have PROT_READ and does the application expect
	 * it to imply PROT_EXEC?  If not, nothing to talk about...
890
	 */
891 892
	if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
		return prot;
893
	if (!(current->personality & READ_IMPLIES_EXEC))
894 895 896 897 898 899 900 901
		return prot;
	/*
	 * if that's an anonymous mapping, let it.
	 */
	if (!file)
		return prot | PROT_EXEC;
	/*
	 * ditto if it's not on noexec mount, except that on !MMU we need
902
	 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
903
	 */
904
	if (!path_noexec(&file->f_path)) {
905
#ifndef CONFIG_MMU
906 907 908 909 910
		if (file->f_op->mmap_capabilities) {
			unsigned caps = file->f_op->mmap_capabilities(file);
			if (!(caps & NOMMU_MAP_EXEC))
				return prot;
		}
911
#endif
912
		return prot | PROT_EXEC;
913
	}
914 915 916 917 918 919 920 921
	/* anything on noexec mount won't get PROT_EXEC */
	return prot;
}

int security_mmap_file(struct file *file, unsigned long prot,
			unsigned long flags)
{
	int ret;
922
	ret = call_int_hook(mmap_file, 0, file, prot,
923
					mmap_prot(file, prot), flags);
924 925 926
	if (ret)
		return ret;
	return ima_file_mmap(file, prot);
927 928
}

929 930
int security_mmap_addr(unsigned long addr)
{
931
	return call_int_hook(mmap_addr, 0, addr);
932 933
}

934 935 936
int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
			    unsigned long prot)
{
937
	return call_int_hook(file_mprotect, 0, vma, reqprot, prot);
938 939 940 941
}

int security_file_lock(struct file *file, unsigned int cmd)
{
942
	return call_int_hook(file_lock, 0, file, cmd);
943 944 945 946
}

int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
{
947
	return call_int_hook(file_fcntl, 0, file, cmd, arg);
948 949
}

950
void security_file_set_fowner(struct file *file)
951
{
952
	call_void_hook(file_set_fowner, file);
953 954 955 956 957
}

int security_file_send_sigiotask(struct task_struct *tsk,
				  struct fown_struct *fown, int sig)
{
958
	return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
959 960 961 962
}

int security_file_receive(struct file *file)
{
963
	return call_int_hook(file_receive, 0, file);
964 965
}

966
int security_file_open(struct file *file, const struct cred *cred)
967
{
968 969
	int ret;

970
	ret = call_int_hook(file_open, 0, file, cred);
971 972 973 974
	if (ret)
		return ret;

	return fsnotify_perm(file, MAY_OPEN);
975 976
}

977 978 979 980 981
int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
{
	return call_int_hook(task_alloc, 0, task, clone_flags);
}

982 983
void security_task_free(struct task_struct *task)
{
984
	call_void_hook(task_free, task);
985 986
}

987 988
int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
{
989
	return call_int_hook(cred_alloc_blank, 0, cred, gfp);
990 991
}

D
David Howells 已提交
992
void security_cred_free(struct cred *cred)
993
{
994
	call_void_hook(cred_free, cred);
995 996
}

D
David Howells 已提交
997
int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
998
{
999
	return call_int_hook(cred_prepare, 0, new, old, gfp);
D
David Howells 已提交
1000 1001
}

1002 1003
void security_transfer_creds(struct cred *new, const struct cred *old)
{
1004
	call_void_hook(cred_transfer, new, old);
1005 1006
}

1007 1008
int security_kernel_act_as(struct cred *new, u32 secid)
{
1009
	return call_int_hook(kernel_act_as, 0, new, secid);
1010 1011 1012 1013
}

int security_kernel_create_files_as(struct cred *new, struct inode *inode)
{
1014
	return call_int_hook(kernel_create_files_as, 0, new, inode);
1015 1016
}

1017
int security_kernel_module_request(char *kmod_name)
1018
{
1019
	return call_int_hook(kernel_module_request, 0, kmod_name);
1020 1021
}

1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032
int security_kernel_read_file(struct file *file, enum kernel_read_file_id id)
{
	int ret;

	ret = call_int_hook(kernel_read_file, 0, file, id);
	if (ret)
		return ret;
	return ima_read_file(file, id);
}
EXPORT_SYMBOL_GPL(security_kernel_read_file);

1033 1034
int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
				   enum kernel_read_file_id id)
1035
{
1036 1037 1038 1039 1040 1041
	int ret;

	ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
	if (ret)
		return ret;
	return ima_post_read_file(file, buf, size, id);
1042 1043 1044
}
EXPORT_SYMBOL_GPL(security_kernel_post_read_file);

D
David Howells 已提交
1045 1046
int security_task_fix_setuid(struct cred *new, const struct cred *old,
			     int flags)
1047
{
1048
	return call_int_hook(task_fix_setuid, 0, new, old, flags);
1049 1050 1051 1052
}

int security_task_setpgid(struct task_struct *p, pid_t pgid)
{
1053
	return call_int_hook(task_setpgid, 0, p, pgid);
1054 1055 1056 1057
}

int security_task_getpgid(struct task_struct *p)
{
1058
	return call_int_hook(task_getpgid, 0, p);
1059 1060 1061 1062
}

int security_task_getsid(struct task_struct *p)
{
1063
	return call_int_hook(task_getsid, 0, p);
1064 1065 1066 1067
}

void security_task_getsecid(struct task_struct *p, u32 *secid)
{
C
Casey Schaufler 已提交
1068
	*secid = 0;
1069
	call_void_hook(task_getsecid, p, secid);
1070 1071 1072 1073 1074
}
EXPORT_SYMBOL(security_task_getsecid);

int security_task_setnice(struct task_struct *p, int nice)
{
1075
	return call_int_hook(task_setnice, 0, p, nice);
1076 1077 1078 1079
}

int security_task_setioprio(struct task_struct *p, int ioprio)
{
1080
	return call_int_hook(task_setioprio, 0, p, ioprio);
1081 1082 1083 1084
}

int security_task_getioprio(struct task_struct *p)
{
1085
	return call_int_hook(task_getioprio, 0, p);
1086 1087
}

1088 1089 1090 1091 1092 1093
int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
			  unsigned int flags)
{
	return call_int_hook(task_prlimit, 0, cred, tcred, flags);
}

1094 1095
int security_task_setrlimit(struct task_struct *p, unsigned int resource,
		struct rlimit *new_rlim)
1096
{
1097
	return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1098 1099
}

1100
int security_task_setscheduler(struct task_struct *p)
1101
{
1102
	return call_int_hook(task_setscheduler, 0, p);
1103 1104 1105 1106
}

int security_task_getscheduler(struct task_struct *p)
{
1107
	return call_int_hook(task_getscheduler, 0, p);
1108 1109 1110 1111
}

int security_task_movememory(struct task_struct *p)
{
1112
	return call_int_hook(task_movememory, 0, p);
1113 1114 1115 1116 1117
}

int security_task_kill(struct task_struct *p, struct siginfo *info,
			int sig, u32 secid)
{
1118
	return call_int_hook(task_kill, 0, p, info, sig, secid);
1119 1120 1121
}

int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
D
David Howells 已提交
1122
			 unsigned long arg4, unsigned long arg5)
1123
{
C
Casey Schaufler 已提交
1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136
	int thisrc;
	int rc = -ENOSYS;
	struct security_hook_list *hp;

	list_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
		thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
		if (thisrc != -ENOSYS) {
			rc = thisrc;
			if (thisrc != 0)
				break;
		}
	}
	return rc;
1137 1138 1139 1140
}

void security_task_to_inode(struct task_struct *p, struct inode *inode)
{
1141
	call_void_hook(task_to_inode, p, inode);
1142 1143 1144 1145
}

int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
{
1146
	return call_int_hook(ipc_permission, 0, ipcp, flag);
1147 1148
}

1149 1150
void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
{
C
Casey Schaufler 已提交
1151
	*secid = 0;
1152
	call_void_hook(ipc_getsecid, ipcp, secid);
1153 1154
}

1155 1156
int security_msg_msg_alloc(struct msg_msg *msg)
{
1157
	return call_int_hook(msg_msg_alloc_security, 0, msg);
1158 1159 1160 1161
}

void security_msg_msg_free(struct msg_msg *msg)
{
1162
	call_void_hook(msg_msg_free_security, msg);
1163 1164 1165 1166
}

int security_msg_queue_alloc(struct msg_queue *msq)
{
1167
	return call_int_hook(msg_queue_alloc_security, 0, msq);
1168 1169 1170 1171
}

void security_msg_queue_free(struct msg_queue *msq)
{
1172
	call_void_hook(msg_queue_free_security, msq);
1173 1174 1175 1176
}

int security_msg_queue_associate(struct msg_queue *msq, int msqflg)
{
1177
	return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1178 1179 1180 1181
}

int security_msg_queue_msgctl(struct msg_queue *msq, int cmd)
{
1182
	return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1183 1184 1185 1186 1187
}

int security_msg_queue_msgsnd(struct msg_queue *msq,
			       struct msg_msg *msg, int msqflg)
{
1188
	return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1189 1190 1191 1192 1193
}

int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
			       struct task_struct *target, long type, int mode)
{
1194
	return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1195 1196 1197 1198
}

int security_shm_alloc(struct shmid_kernel *shp)
{
1199
	return call_int_hook(shm_alloc_security, 0, shp);
1200 1201 1202 1203
}

void security_shm_free(struct shmid_kernel *shp)
{
1204
	call_void_hook(shm_free_security, shp);
1205 1206 1207 1208
}

int security_shm_associate(struct shmid_kernel *shp, int shmflg)
{
1209
	return call_int_hook(shm_associate, 0, shp, shmflg);
1210 1211 1212 1213
}

int security_shm_shmctl(struct shmid_kernel *shp, int cmd)
{
1214
	return call_int_hook(shm_shmctl, 0, shp, cmd);
1215 1216 1217 1218
}

int security_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr, int shmflg)
{
1219
	return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
1220 1221 1222 1223
}

int security_sem_alloc(struct sem_array *sma)
{
1224
	return call_int_hook(sem_alloc_security, 0, sma);
1225 1226 1227 1228
}

void security_sem_free(struct sem_array *sma)
{
1229
	call_void_hook(sem_free_security, sma);
1230 1231 1232 1233
}

int security_sem_associate(struct sem_array *sma, int semflg)
{
1234
	return call_int_hook(sem_associate, 0, sma, semflg);
1235 1236 1237 1238
}

int security_sem_semctl(struct sem_array *sma, int cmd)
{
1239
	return call_int_hook(sem_semctl, 0, sma, cmd);
1240 1241 1242 1243 1244
}

int security_sem_semop(struct sem_array *sma, struct sembuf *sops,
			unsigned nsops, int alter)
{
1245
	return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
1246 1247 1248 1249 1250 1251
}

void security_d_instantiate(struct dentry *dentry, struct inode *inode)
{
	if (unlikely(inode && IS_PRIVATE(inode)))
		return;
1252
	call_void_hook(d_instantiate, dentry, inode);
1253 1254 1255 1256 1257
}
EXPORT_SYMBOL(security_d_instantiate);

int security_getprocattr(struct task_struct *p, char *name, char **value)
{
C
Casey Schaufler 已提交
1258
	return call_int_hook(getprocattr, -EINVAL, p, name, value);
1259 1260
}

1261
int security_setprocattr(const char *name, void *value, size_t size)
1262
{
1263
	return call_int_hook(setprocattr, -EINVAL, name, value, size);
1264 1265 1266 1267
}

int security_netlink_send(struct sock *sk, struct sk_buff *skb)
{
1268
	return call_int_hook(netlink_send, 0, sk, skb);
1269 1270
}

1271 1272
int security_ismaclabel(const char *name)
{
1273
	return call_int_hook(ismaclabel, 0, name);
1274 1275 1276
}
EXPORT_SYMBOL(security_ismaclabel);

1277 1278
int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
{
C
Casey Schaufler 已提交
1279 1280
	return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
				seclen);
1281 1282 1283
}
EXPORT_SYMBOL(security_secid_to_secctx);

1284
int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1285
{
C
Casey Schaufler 已提交
1286
	*secid = 0;
1287
	return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
1288 1289 1290
}
EXPORT_SYMBOL(security_secctx_to_secid);

1291 1292
void security_release_secctx(char *secdata, u32 seclen)
{
1293
	call_void_hook(release_secctx, secdata, seclen);
1294 1295 1296
}
EXPORT_SYMBOL(security_release_secctx);

1297 1298 1299 1300 1301 1302
void security_inode_invalidate_secctx(struct inode *inode)
{
	call_void_hook(inode_invalidate_secctx, inode);
}
EXPORT_SYMBOL(security_inode_invalidate_secctx);

1303 1304
int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
{
1305
	return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
1306 1307 1308 1309 1310
}
EXPORT_SYMBOL(security_inode_notifysecctx);

int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
{
1311
	return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
1312 1313 1314 1315 1316
}
EXPORT_SYMBOL(security_inode_setsecctx);

int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
{
C
Casey Schaufler 已提交
1317
	return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
1318 1319 1320
}
EXPORT_SYMBOL(security_inode_getsecctx);

1321 1322
#ifdef CONFIG_SECURITY_NETWORK

1323
int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1324
{
1325
	return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
1326 1327 1328 1329 1330
}
EXPORT_SYMBOL(security_unix_stream_connect);

int security_unix_may_send(struct socket *sock,  struct socket *other)
{
1331
	return call_int_hook(unix_may_send, 0, sock, other);
1332 1333 1334 1335 1336
}
EXPORT_SYMBOL(security_unix_may_send);

int security_socket_create(int family, int type, int protocol, int kern)
{
1337
	return call_int_hook(socket_create, 0, family, type, protocol, kern);
1338 1339 1340 1341 1342
}

int security_socket_post_create(struct socket *sock, int family,
				int type, int protocol, int kern)
{
1343
	return call_int_hook(socket_post_create, 0, sock, family, type,
1344 1345 1346 1347 1348
						protocol, kern);
}

int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
{
1349
	return call_int_hook(socket_bind, 0, sock, address, addrlen);
1350 1351 1352 1353
}

int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
{
1354
	return call_int_hook(socket_connect, 0, sock, address, addrlen);
1355 1356 1357 1358
}

int security_socket_listen(struct socket *sock, int backlog)
{
1359
	return call_int_hook(socket_listen, 0, sock, backlog);
1360 1361 1362 1363
}

int security_socket_accept(struct socket *sock, struct socket *newsock)
{
1364
	return call_int_hook(socket_accept, 0, sock, newsock);
1365 1366 1367 1368
}

int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
{
1369
	return call_int_hook(socket_sendmsg, 0, sock, msg, size);
1370 1371 1372 1373 1374
}

int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
			    int size, int flags)
{
1375
	return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
1376 1377 1378 1379
}

int security_socket_getsockname(struct socket *sock)
{
1380
	return call_int_hook(socket_getsockname, 0, sock);
1381 1382 1383 1384
}

int security_socket_getpeername(struct socket *sock)
{
1385
	return call_int_hook(socket_getpeername, 0, sock);
1386 1387 1388 1389
}

int security_socket_getsockopt(struct socket *sock, int level, int optname)
{
1390
	return call_int_hook(socket_getsockopt, 0, sock, level, optname);
1391 1392 1393 1394
}

int security_socket_setsockopt(struct socket *sock, int level, int optname)
{
1395
	return call_int_hook(socket_setsockopt, 0, sock, level, optname);
1396 1397 1398 1399
}

int security_socket_shutdown(struct socket *sock, int how)
{
1400
	return call_int_hook(socket_shutdown, 0, sock, how);
1401 1402 1403 1404
}

int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
1405
	return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
1406 1407 1408 1409 1410 1411
}
EXPORT_SYMBOL(security_sock_rcv_skb);

int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
				      int __user *optlen, unsigned len)
{
C
Casey Schaufler 已提交
1412 1413
	return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
				optval, optlen, len);
1414 1415 1416 1417
}

int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
{
1418 1419
	return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
			     skb, secid);
1420 1421 1422 1423 1424
}
EXPORT_SYMBOL(security_socket_getpeersec_dgram);

int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
{
1425
	return call_int_hook(sk_alloc_security, 0, sk, family, priority);
1426 1427 1428 1429
}

void security_sk_free(struct sock *sk)
{
1430
	call_void_hook(sk_free_security, sk);
1431 1432 1433 1434
}

void security_sk_clone(const struct sock *sk, struct sock *newsk)
{
1435
	call_void_hook(sk_clone_security, sk, newsk);
1436
}
1437
EXPORT_SYMBOL(security_sk_clone);
1438 1439 1440

void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
{
1441
	call_void_hook(sk_getsecid, sk, &fl->flowi_secid);
1442 1443 1444 1445 1446
}
EXPORT_SYMBOL(security_sk_classify_flow);

void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
{
1447
	call_void_hook(req_classify_flow, req, fl);
1448 1449 1450 1451 1452
}
EXPORT_SYMBOL(security_req_classify_flow);

void security_sock_graft(struct sock *sk, struct socket *parent)
{
1453
	call_void_hook(sock_graft, sk, parent);
1454 1455 1456 1457 1458 1459
}
EXPORT_SYMBOL(security_sock_graft);

int security_inet_conn_request(struct sock *sk,
			struct sk_buff *skb, struct request_sock *req)
{
1460
	return call_int_hook(inet_conn_request, 0, sk, skb, req);
1461 1462 1463 1464 1465 1466
}
EXPORT_SYMBOL(security_inet_conn_request);

void security_inet_csk_clone(struct sock *newsk,
			const struct request_sock *req)
{
1467
	call_void_hook(inet_csk_clone, newsk, req);
1468 1469 1470 1471 1472
}

void security_inet_conn_established(struct sock *sk,
			struct sk_buff *skb)
{
1473
	call_void_hook(inet_conn_established, sk, skb);
1474 1475
}

1476 1477
int security_secmark_relabel_packet(u32 secid)
{
1478
	return call_int_hook(secmark_relabel_packet, 0, secid);
1479 1480 1481 1482 1483
}
EXPORT_SYMBOL(security_secmark_relabel_packet);

void security_secmark_refcount_inc(void)
{
1484
	call_void_hook(secmark_refcount_inc);
1485 1486 1487 1488 1489
}
EXPORT_SYMBOL(security_secmark_refcount_inc);

void security_secmark_refcount_dec(void)
{
1490
	call_void_hook(secmark_refcount_dec);
1491 1492 1493
}
EXPORT_SYMBOL(security_secmark_refcount_dec);

1494 1495
int security_tun_dev_alloc_security(void **security)
{
1496
	return call_int_hook(tun_dev_alloc_security, 0, security);
1497 1498 1499 1500 1501
}
EXPORT_SYMBOL(security_tun_dev_alloc_security);

void security_tun_dev_free_security(void *security)
{
1502
	call_void_hook(tun_dev_free_security, security);
1503 1504 1505
}
EXPORT_SYMBOL(security_tun_dev_free_security);

P
Paul Moore 已提交
1506 1507
int security_tun_dev_create(void)
{
1508
	return call_int_hook(tun_dev_create, 0);
P
Paul Moore 已提交
1509 1510 1511
}
EXPORT_SYMBOL(security_tun_dev_create);

1512
int security_tun_dev_attach_queue(void *security)
P
Paul Moore 已提交
1513
{
1514
	return call_int_hook(tun_dev_attach_queue, 0, security);
P
Paul Moore 已提交
1515
}
1516
EXPORT_SYMBOL(security_tun_dev_attach_queue);
P
Paul Moore 已提交
1517

1518
int security_tun_dev_attach(struct sock *sk, void *security)
P
Paul Moore 已提交
1519
{
1520
	return call_int_hook(tun_dev_attach, 0, sk, security);
P
Paul Moore 已提交
1521 1522 1523
}
EXPORT_SYMBOL(security_tun_dev_attach);

1524 1525
int security_tun_dev_open(void *security)
{
1526
	return call_int_hook(tun_dev_open, 0, security);
1527 1528 1529
}
EXPORT_SYMBOL(security_tun_dev_open);

1530 1531
#endif	/* CONFIG_SECURITY_NETWORK */

1532 1533 1534 1535 1536 1537 1538 1539
#ifdef CONFIG_SECURITY_INFINIBAND

int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey)
{
	return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey);
}
EXPORT_SYMBOL(security_ib_pkey_access);

1540 1541 1542 1543 1544 1545
int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num)
{
	return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num);
}
EXPORT_SYMBOL(security_ib_endport_manage_subnet);

1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558
int security_ib_alloc_security(void **sec)
{
	return call_int_hook(ib_alloc_security, 0, sec);
}
EXPORT_SYMBOL(security_ib_alloc_security);

void security_ib_free_security(void *sec)
{
	call_void_hook(ib_free_security, sec);
}
EXPORT_SYMBOL(security_ib_free_security);
#endif	/* CONFIG_SECURITY_INFINIBAND */

1559 1560
#ifdef CONFIG_SECURITY_NETWORK_XFRM

1561 1562 1563
int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
			       struct xfrm_user_sec_ctx *sec_ctx,
			       gfp_t gfp)
1564
{
1565
	return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
1566 1567 1568
}
EXPORT_SYMBOL(security_xfrm_policy_alloc);

1569 1570
int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
			      struct xfrm_sec_ctx **new_ctxp)
1571
{
1572
	return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
1573 1574
}

1575
void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
1576
{
1577
	call_void_hook(xfrm_policy_free_security, ctx);
1578 1579 1580
}
EXPORT_SYMBOL(security_xfrm_policy_free);

1581
int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
1582
{
1583
	return call_int_hook(xfrm_policy_delete_security, 0, ctx);
1584 1585
}

1586 1587
int security_xfrm_state_alloc(struct xfrm_state *x,
			      struct xfrm_user_sec_ctx *sec_ctx)
1588
{
1589
	return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
1590 1591 1592 1593 1594 1595
}
EXPORT_SYMBOL(security_xfrm_state_alloc);

int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
				      struct xfrm_sec_ctx *polsec, u32 secid)
{
1596
	return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
1597 1598 1599 1600
}

int security_xfrm_state_delete(struct xfrm_state *x)
{
1601
	return call_int_hook(xfrm_state_delete_security, 0, x);
1602 1603 1604 1605 1606
}
EXPORT_SYMBOL(security_xfrm_state_delete);

void security_xfrm_state_free(struct xfrm_state *x)
{
1607
	call_void_hook(xfrm_state_free_security, x);
1608 1609
}

1610
int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
1611
{
1612
	return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
1613 1614 1615
}

int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
1616 1617
				       struct xfrm_policy *xp,
				       const struct flowi *fl)
1618
{
C
Casey Schaufler 已提交
1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636
	struct security_hook_list *hp;
	int rc = 1;

	/*
	 * Since this function is expected to return 0 or 1, the judgment
	 * becomes difficult if multiple LSMs supply this call. Fortunately,
	 * we can use the first LSM's judgment because currently only SELinux
	 * supplies this call.
	 *
	 * For speed optimization, we explicitly break the loop rather than
	 * using the macro
	 */
	list_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
				list) {
		rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl);
		break;
	}
	return rc;
1637 1638 1639 1640
}

int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
{
1641
	return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
1642 1643 1644 1645
}

void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
{
1646 1647
	int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid,
				0);
1648 1649 1650 1651 1652 1653 1654 1655 1656

	BUG_ON(rc);
}
EXPORT_SYMBOL(security_skb_classify_flow);

#endif	/* CONFIG_SECURITY_NETWORK_XFRM */

#ifdef CONFIG_KEYS

D
David Howells 已提交
1657 1658
int security_key_alloc(struct key *key, const struct cred *cred,
		       unsigned long flags)
1659
{
1660
	return call_int_hook(key_alloc, 0, key, cred, flags);
1661 1662 1663 1664
}

void security_key_free(struct key *key)
{
1665
	call_void_hook(key_free, key);
1666 1667 1668
}

int security_key_permission(key_ref_t key_ref,
1669
			    const struct cred *cred, unsigned perm)
1670
{
1671
	return call_int_hook(key_permission, 0, key_ref, cred, perm);
1672 1673
}

1674 1675
int security_key_getsecurity(struct key *key, char **_buffer)
{
C
Casey Schaufler 已提交
1676
	*_buffer = NULL;
1677
	return call_int_hook(key_getsecurity, 0, key, _buffer);
1678 1679
}

1680
#endif	/* CONFIG_KEYS */
1681 1682 1683 1684 1685

#ifdef CONFIG_AUDIT

int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
{
1686
	return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
1687 1688 1689 1690
}

int security_audit_rule_known(struct audit_krule *krule)
{
1691
	return call_int_hook(audit_rule_known, 0, krule);
1692 1693 1694 1695
}

void security_audit_rule_free(void *lsmrule)
{
1696
	call_void_hook(audit_rule_free, lsmrule);
1697 1698 1699 1700 1701
}

int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
			      struct audit_context *actx)
{
1702 1703
	return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule,
				actx);
1704
}
C
Casey Schaufler 已提交
1705
#endif /* CONFIG_AUDIT */