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	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * 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>
  * Copyright (C) 2016 Mellanox Technologies
  */
 
 #define pr_fmt(fmt) "LSM: " fmt
 
 #include <linux/bpf.h>
 #include <linux/capability.h>
 #include <linux/dcache.h>
 #include <linux/export.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/kernel_read_file.h>
 #include <linux/lsm_hooks.h>
 #include <linux/integrity.h>
 #include <linux/ima.h>
 #include <linux/evm.h>
 #include <linux/fsnotify.h>
 #include <linux/mman.h>
 #include <linux/mount.h>
 #include <linux/personality.h>
 #include <linux/backing-dev.h>
 #include <linux/string.h>
 #include <linux/msg.h>
 #include <net/flow.h>
 
 #define MAX_LSM_EVM_XATTR   2
 
 /* How many LSMs were built into the kernel? */
 #define LSM_COUNT (__end_lsm_info - __start_lsm_info)
 
 /*
  * These are descriptions of the reasons that can be passed to the
  * security_locked_down() LSM hook. Placing this array here allows
  * all security modules to use the same descriptions for auditing
  * purposes.
  */
 const char *const lockdown_reasons[LOCKDOWN_CONFIDENTIALITY_MAX+1] = {
     [LOCKDOWN_NONE] = "none",
     [LOCKDOWN_MODULE_SIGNATURE] = "unsigned module loading",
     [LOCKDOWN_DEV_MEM] = "/dev/mem,kmem,port",
     [LOCKDOWN_EFI_TEST] = "/dev/efi_test access",
     [LOCKDOWN_KEXEC] = "kexec of unsigned images",
     [LOCKDOWN_HIBERNATION] = "hibernation",
     [LOCKDOWN_PCI_ACCESS] = "direct PCI access",
     [LOCKDOWN_IOPORT] = "raw io port access",
     [LOCKDOWN_MSR] = "raw MSR access",
     [LOCKDOWN_ACPI_TABLES] = "modifying ACPI tables",
     [LOCKDOWN_PCMCIA_CIS] = "direct PCMCIA CIS storage",
     [LOCKDOWN_TIOCSSERIAL] = "reconfiguration of serial port IO",
     [LOCKDOWN_MODULE_PARAMETERS] = "unsafe module parameters",
     [LOCKDOWN_MMIOTRACE] = "unsafe mmio",
     [LOCKDOWN_DEBUGFS] = "debugfs access",
     [LOCKDOWN_XMON_WR] = "xmon write access",
     [LOCKDOWN_BPF_WRITE_USER] = "use of bpf to write user RAM",
     [LOCKDOWN_DBG_WRITE_KERNEL] = "use of kgdb/kdb to write kernel RAM",
     [LOCKDOWN_INTEGRITY_MAX] = "integrity",
     [LOCKDOWN_KCORE] = "/proc/kcore access",
     [LOCKDOWN_KPROBES] = "use of kprobes",
     [LOCKDOWN_BPF_READ_KERNEL] = "use of bpf to read kernel RAM",
     [LOCKDOWN_DBG_READ_KERNEL] = "use of kgdb/kdb to read kernel RAM",
     [LOCKDOWN_PERF] = "unsafe use of perf",
     [LOCKDOWN_TRACEFS] = "use of tracefs",
     [LOCKDOWN_XMON_RW] = "xmon read and write access",
     [LOCKDOWN_XFRM_SECRET] = "xfrm SA secret",
     [LOCKDOWN_CONFIDENTIALITY_MAX] = "confidentiality",
 };
 
 struct security_hook_heads security_hook_heads __lsm_ro_after_init;
 static BLOCKING_NOTIFIER_HEAD(blocking_lsm_notifier_chain);
 
 static struct kmem_cache *lsm_file_cache;
 static struct kmem_cache *lsm_inode_cache;
 
 char *lsm_names;
 static struct lsm_blob_sizes blob_sizes __lsm_ro_after_init;
 
 /* Boot-time LSM user choice */
 static __initdata const char *chosen_lsm_order;
 static __initdata const char *chosen_major_lsm;
 
 static __initconst const char * const builtin_lsm_order = CONFIG_LSM;
 
 /* Ordered list of LSMs to initialize. */
 static __initdata struct lsm_info **ordered_lsms;
 static __initdata struct lsm_info *exclusive;
 
 static __initdata bool debug;
 #define init_debug(...)                     \
     do {                            \
         if (debug)                  \
             pr_info(__VA_ARGS__);           \
     } while (0)
 
 static bool __init is_enabled(struct lsm_info *lsm)
 {
     if (!lsm->enabled)
         return false;
 
     return *lsm->enabled;
 }
 
 /* Mark an LSM's enabled flag. */
 static int lsm_enabled_true __initdata = 1;
 static int lsm_enabled_false __initdata = 0;
 static void __init set_enabled(struct lsm_info *lsm, bool enabled)
 {
     /*
      * When an LSM hasn't configured an enable variable, we can use
      * a hard-coded location for storing the default enabled state.
      */
     if (!lsm->enabled) {
         if (enabled)
             lsm->enabled = &lsm_enabled_true;
         else
             lsm->enabled = &lsm_enabled_false;
     } else if (lsm->enabled == &lsm_enabled_true) {
         if (!enabled)
             lsm->enabled = &lsm_enabled_false;
     } else if (lsm->enabled == &lsm_enabled_false) {
         if (enabled)
             lsm->enabled = &lsm_enabled_true;
     } else {
         *lsm->enabled = enabled;
     }
 }
 
 /* Is an LSM already listed in the ordered LSMs list? */
 static bool __init exists_ordered_lsm(struct lsm_info *lsm)
 {
     struct lsm_info **check;
 
     for (check = ordered_lsms; *check; check++)
         if (*check == lsm)
             return true;
 
     return false;
 }
 
 /* Append an LSM to the list of ordered LSMs to initialize. */
 static int last_lsm __initdata;
 static void __init append_ordered_lsm(struct lsm_info *lsm, const char *from)
 {
     /* Ignore duplicate selections. */
     if (exists_ordered_lsm(lsm))
         return;
 
     if (WARN(last_lsm == LSM_COUNT, "%s: out of LSM slots!?\n", from))
         return;
 
     /* Enable this LSM, if it is not already set. */
     if (!lsm->enabled)
         lsm->enabled = &lsm_enabled_true;
     ordered_lsms[last_lsm++] = lsm;
 
     init_debug("%s ordering: %s (%sabled)\n", from, lsm->name,
            is_enabled(lsm) ? "en" : "dis");
 }
 
 /* Is an LSM allowed to be initialized? */
 static bool __init lsm_allowed(struct lsm_info *lsm)
 {
     /* Skip if the LSM is disabled. */
     if (!is_enabled(lsm))
         return false;
 
     /* Not allowed if another exclusive LSM already initialized. */
     if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && exclusive) {
         init_debug("exclusive disabled: %s\n", lsm->name);
         return false;
     }
 
     return true;
 }
 
 static void __init lsm_set_blob_size(int *need, int *lbs)
 {
     int offset;
 
     if (*need > 0) {
         offset = *lbs;
         *lbs += *need;
         *need = offset;
     }
 }
 
 static void __init lsm_set_blob_sizes(struct lsm_blob_sizes *needed)
 {
     if (!needed)
         return;
 
     lsm_set_blob_size(&needed->lbs_cred, &blob_sizes.lbs_cred);
     lsm_set_blob_size(&needed->lbs_file, &blob_sizes.lbs_file);
     /*
      * The inode blob gets an rcu_head in addition to
      * what the modules might need.
      */
     if (needed->lbs_inode && blob_sizes.lbs_inode == 0)
         blob_sizes.lbs_inode = sizeof(struct rcu_head);
     lsm_set_blob_size(&needed->lbs_inode, &blob_sizes.lbs_inode);
     lsm_set_blob_size(&needed->lbs_ipc, &blob_sizes.lbs_ipc);
     lsm_set_blob_size(&needed->lbs_msg_msg, &blob_sizes.lbs_msg_msg);
     lsm_set_blob_size(&needed->lbs_superblock, &blob_sizes.lbs_superblock);
     lsm_set_blob_size(&needed->lbs_task, &blob_sizes.lbs_task);
 }
 
 /* Prepare LSM for initialization. */
 static void __init prepare_lsm(struct lsm_info *lsm)
 {
     int enabled = lsm_allowed(lsm);
 
     /* Record enablement (to handle any following exclusive LSMs). */
     set_enabled(lsm, enabled);
 
     /* If enabled, do pre-initialization work. */
     if (enabled) {
         if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && !exclusive) {
             exclusive = lsm;
             init_debug("exclusive chosen: %s\n", lsm->name);
         }
 
         lsm_set_blob_sizes(lsm->blobs);
     }
 }
 
 /* Initialize a given LSM, if it is enabled. */
 static void __init initialize_lsm(struct lsm_info *lsm)
 {
     if (is_enabled(lsm)) {
         int ret;
 
         init_debug("initializing %s\n", lsm->name);
         ret = lsm->init();
         WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret);
     }
 }
 
 /* Populate ordered LSMs list from comma-separated LSM name list. */
 static void __init ordered_lsm_parse(const char *order, const char *origin)
 {
     struct lsm_info *lsm;
     char *sep, *name, *next;
 
     /* LSM_ORDER_FIRST is always first. */
     for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
         if (lsm->order == LSM_ORDER_FIRST)
             append_ordered_lsm(lsm, "first");
     }
 
     /* Process "security=", if given. */
     if (chosen_major_lsm) {
         struct lsm_info *major;
 
         /*
          * To match the original "security=" behavior, this
          * explicitly does NOT fallback to another Legacy Major
          * if the selected one was separately disabled: disable
          * all non-matching Legacy Major LSMs.
          */
         for (major = __start_lsm_info; major < __end_lsm_info;
              major++) {
             if ((major->flags & LSM_FLAG_LEGACY_MAJOR) &&
                 strcmp(major->name, chosen_major_lsm) != 0) {
                 set_enabled(major, false);
                 init_debug("security=%s disabled: %s\n",
                        chosen_major_lsm, major->name);
             }
         }
     }
 
     sep = kstrdup(order, GFP_KERNEL);
     next = sep;
     /* Walk the list, looking for matching LSMs. */
     while ((name = strsep(&next, ",")) != NULL) {
         bool found = false;
 
         for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
             if (lsm->order == LSM_ORDER_MUTABLE &&
                 strcmp(lsm->name, name) == 0) {
                 append_ordered_lsm(lsm, origin);
                 found = true;
             }
         }
 
         if (!found)
             init_debug("%s ignored: %s\n", origin, name);
     }
 
     /* Process "security=", if given. */
     if (chosen_major_lsm) {
         for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
             if (exists_ordered_lsm(lsm))
                 continue;
             if (strcmp(lsm->name, chosen_major_lsm) == 0)
                 append_ordered_lsm(lsm, "security=");
         }
     }
 
     /* Disable all LSMs not in the ordered list. */
     for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
         if (exists_ordered_lsm(lsm))
             continue;
         set_enabled(lsm, false);
         init_debug("%s disabled: %s\n", origin, lsm->name);
     }
 
     kfree(sep);
 }
 
 static void __init lsm_early_cred(struct cred *cred);
 static void __init lsm_early_task(struct task_struct *task);
 
 static int lsm_append(const char *new, char **result);
 
 static void __init ordered_lsm_init(void)
 {
     struct lsm_info **lsm;
 
     ordered_lsms = kcalloc(LSM_COUNT + 1, sizeof(*ordered_lsms),
                 GFP_KERNEL);
 
     if (chosen_lsm_order) {
         if (chosen_major_lsm) {
             pr_info("security= is ignored because it is superseded by lsm=\n");
             chosen_major_lsm = NULL;
         }
         ordered_lsm_parse(chosen_lsm_order, "cmdline");
     } else
         ordered_lsm_parse(builtin_lsm_order, "builtin");
 
     for (lsm = ordered_lsms; *lsm; lsm++)
         prepare_lsm(*lsm);
 
     init_debug("cred blob size       = %d\n", blob_sizes.lbs_cred);
     init_debug("file blob size       = %d\n", blob_sizes.lbs_file);
     init_debug("inode blob size      = %d\n", blob_sizes.lbs_inode);
     init_debug("ipc blob size        = %d\n", blob_sizes.lbs_ipc);
     init_debug("msg_msg blob size    = %d\n", blob_sizes.lbs_msg_msg);
     init_debug("superblock blob size = %d\n", blob_sizes.lbs_superblock);
     init_debug("task blob size       = %d\n", blob_sizes.lbs_task);
 
     /*
      * Create any kmem_caches needed for blobs
      */
     if (blob_sizes.lbs_file)
         lsm_file_cache = kmem_cache_create("lsm_file_cache",
                            blob_sizes.lbs_file, 0,
                            SLAB_PANIC, NULL);
     if (blob_sizes.lbs_inode)
         lsm_inode_cache = kmem_cache_create("lsm_inode_cache",
                             blob_sizes.lbs_inode, 0,
                             SLAB_PANIC, NULL);
 
     lsm_early_cred((struct cred *) current->cred);
     lsm_early_task(current);
     for (lsm = ordered_lsms; *lsm; lsm++)
         initialize_lsm(*lsm);
 
     kfree(ordered_lsms);
 }
 
 int __init early_security_init(void)
 {
     struct lsm_info *lsm;
 
 #define LSM_HOOK(RET, DEFAULT, NAME, ...) \
     INIT_HLIST_HEAD(&security_hook_heads.NAME);
 #include "linux/lsm_hook_defs.h"
 #undef LSM_HOOK
 
     for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) {
         if (!lsm->enabled)
             lsm->enabled = &lsm_enabled_true;
         prepare_lsm(lsm);
         initialize_lsm(lsm);
     }
 
     return 0;
 }
 
 /**
  * security_init - initializes the security framework
  *
  * This should be called early in the kernel initialization sequence.
  */
 int __init security_init(void)
 {
     struct lsm_info *lsm;
 
     pr_info("Security Framework initializing\n");
 
     /*
      * Append the names of the early LSM modules now that kmalloc() is
      * available
      */
     for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) {
         if (lsm->enabled)
             lsm_append(lsm->name, &lsm_names);
     }
 
     /* Load LSMs in specified order. */
     ordered_lsm_init();
 
     return 0;
 }
 
 /* Save user chosen LSM */
 static int __init choose_major_lsm(char *str)
 {
     chosen_major_lsm = str;
     return 1;
 }
 __setup("security=", choose_major_lsm);
 
 /* Explicitly choose LSM initialization order. */
 static int __init choose_lsm_order(char *str)
 {
     chosen_lsm_order = str;
     return 1;
 }
 __setup("lsm=", choose_lsm_order);
 
 /* Enable LSM order debugging. */
 static int __init enable_debug(char *str)
 {
     debug = true;
     return 1;
 }
 __setup("lsm.debug", enable_debug);
 
 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);
 }
 
 static int lsm_append(const char *new, char **result)
 {
     char *cp;
 
     if (*result == NULL) {
         *result = kstrdup(new, GFP_KERNEL);
         if (*result == NULL)
             return -ENOMEM;
     } else {
         /* Check if it is the last registered name */
         if (match_last_lsm(*result, new))
             return 0;
         cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
         if (cp == NULL)
             return -ENOMEM;
         kfree(*result);
         *result = cp;
     }
     return 0;
 }
 
 /**
  * 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,
                 const char *lsm)
 {
     int i;
 
     for (i = 0; i < count; i++) {
         hooks[i].lsm = lsm;
         hlist_add_tail_rcu(&hooks[i].list, hooks[i].head);
     }
 
     /*
      * Don't try to append during early_security_init(), we'll come back
      * and fix this up afterwards.
      */
     if (slab_is_available()) {
         if (lsm_append(lsm, &lsm_names) < 0)
             panic("%s - Cannot get early memory.\n", __func__);
     }
 }
 
 int call_blocking_lsm_notifier(enum lsm_event event, void *data)
 {
     return blocking_notifier_call_chain(&blocking_lsm_notifier_chain,
                         event, data);
 }
 EXPORT_SYMBOL(call_blocking_lsm_notifier);
 
 int register_blocking_lsm_notifier(struct notifier_block *nb)
 {
     return blocking_notifier_chain_register(&blocking_lsm_notifier_chain,
                         nb);
 }
 EXPORT_SYMBOL(register_blocking_lsm_notifier);
 
 int unregister_blocking_lsm_notifier(struct notifier_block *nb)
 {
     return blocking_notifier_chain_unregister(&blocking_lsm_notifier_chain,
                           nb);
 }
 EXPORT_SYMBOL(unregister_blocking_lsm_notifier);
 
 /**
  * lsm_cred_alloc - allocate a composite cred blob
  * @cred: the cred that needs a blob
  * @gfp: allocation type
  *
  * Allocate the cred blob for all the modules
  *
  * Returns 0, or -ENOMEM if memory can't be allocated.
  */
 static int lsm_cred_alloc(struct cred *cred, gfp_t gfp)
 {
     if (blob_sizes.lbs_cred == 0) {
         cred->security = NULL;
         return 0;
     }
 
     cred->security = kzalloc(blob_sizes.lbs_cred, gfp);
     if (cred->security == NULL)
         return -ENOMEM;
     return 0;
 }
 
 /**
  * lsm_early_cred - during initialization allocate a composite cred blob
  * @cred: the cred that needs a blob
  *
  * Allocate the cred blob for all the modules
  */
 static void __init lsm_early_cred(struct cred *cred)
 {
     int rc = lsm_cred_alloc(cred, GFP_KERNEL);
 
     if (rc)
         panic("%s: Early cred alloc failed.\n", __func__);
 }
 
 /**
  * lsm_file_alloc - allocate a composite file blob
  * @file: the file that needs a blob
  *
  * Allocate the file blob for all the modules
  *
  * Returns 0, or -ENOMEM if memory can't be allocated.
  */
 static int lsm_file_alloc(struct file *file)
 {
     if (!lsm_file_cache) {
         file->f_security = NULL;
         return 0;
     }
 
     file->f_security = kmem_cache_zalloc(lsm_file_cache, GFP_KERNEL);
     if (file->f_security == NULL)
         return -ENOMEM;
     return 0;
 }
 
 /**
  * lsm_inode_alloc - allocate a composite inode blob
  * @inode: the inode that needs a blob
  *
  * Allocate the inode blob for all the modules
  *
  * Returns 0, or -ENOMEM if memory can't be allocated.
  */
 int lsm_inode_alloc(struct inode *inode)
 {
     if (!lsm_inode_cache) {
         inode->i_security = NULL;
         return 0;
     }
 
     inode->i_security = kmem_cache_zalloc(lsm_inode_cache, GFP_NOFS);
     if (inode->i_security == NULL)
         return -ENOMEM;
     return 0;
 }
 
 /**
  * lsm_task_alloc - allocate a composite task blob
  * @task: the task that needs a blob
  *
  * Allocate the task blob for all the modules
  *
  * Returns 0, or -ENOMEM if memory can't be allocated.
  */
 static int lsm_task_alloc(struct task_struct *task)
 {
     if (blob_sizes.lbs_task == 0) {
         task->security = NULL;
         return 0;
     }
 
     task->security = kzalloc(blob_sizes.lbs_task, GFP_KERNEL);
     if (task->security == NULL)
         return -ENOMEM;
     return 0;
 }
 
 /**
  * lsm_ipc_alloc - allocate a composite ipc blob
  * @kip: the ipc that needs a blob
  *
  * Allocate the ipc blob for all the modules
  *
  * Returns 0, or -ENOMEM if memory can't be allocated.
  */
 static int lsm_ipc_alloc(struct kern_ipc_perm *kip)
 {
     if (blob_sizes.lbs_ipc == 0) {
         kip->security = NULL;
         return 0;
     }
 
     kip->security = kzalloc(blob_sizes.lbs_ipc, GFP_KERNEL);
     if (kip->security == NULL)
         return -ENOMEM;
     return 0;
 }
 
 /**
  * lsm_msg_msg_alloc - allocate a composite msg_msg blob
  * @mp: the msg_msg that needs a blob
  *
  * Allocate the ipc blob for all the modules
  *
  * Returns 0, or -ENOMEM if memory can't be allocated.
  */
 static int lsm_msg_msg_alloc(struct msg_msg *mp)
 {
     if (blob_sizes.lbs_msg_msg == 0) {
         mp->security = NULL;
         return 0;
     }
 
     mp->security = kzalloc(blob_sizes.lbs_msg_msg, GFP_KERNEL);
     if (mp->security == NULL)
         return -ENOMEM;
     return 0;
 }
 
 /**
  * lsm_early_task - during initialization allocate a composite task blob
  * @task: the task that needs a blob
  *
  * Allocate the task blob for all the modules
  */
 static void __init lsm_early_task(struct task_struct *task)
 {
     int rc = lsm_task_alloc(task);
 
     if (rc)
         panic("%s: Early task alloc failed.\n", __func__);
 }
 
 /**
  * lsm_superblock_alloc - allocate a composite superblock blob
  * @sb: the superblock that needs a blob
  *
  * Allocate the superblock blob for all the modules
  *
  * Returns 0, or -ENOMEM if memory can't be allocated.
  */
 static int lsm_superblock_alloc(struct super_block *sb)
 {
     if (blob_sizes.lbs_superblock == 0) {
         sb->s_security = NULL;
         return 0;
     }
 
     sb->s_security = kzalloc(blob_sizes.lbs_superblock, GFP_KERNEL);
     if (sb->s_security == NULL)
         return -ENOMEM;
     return 0;
 }
 
 /*
  * The default value of the LSM hook is defined in linux/lsm_hook_defs.h and
  * can be accessed with:
  *
  *  LSM_RET_DEFAULT(<hook_name>)
  *
  * The macros below define static constants for the default value of each
  * LSM hook.
  */
 #define LSM_RET_DEFAULT(NAME) (NAME##_default)
 #define DECLARE_LSM_RET_DEFAULT_void(DEFAULT, NAME)
 #define DECLARE_LSM_RET_DEFAULT_int(DEFAULT, NAME) \
     static const int __maybe_unused LSM_RET_DEFAULT(NAME) = (DEFAULT);
 #define LSM_HOOK(RET, DEFAULT, NAME, ...) \
     DECLARE_LSM_RET_DEFAULT_##RET(DEFAULT, NAME)
 
 #include <linux/lsm_hook_defs.h>
 #undef LSM_HOOK
 
 /*
  * Hook list operation macros.
  *
  * call_void_hook:
  *  This is a hook that does not return a value.
  *
  * call_int_hook:
  *  This is a hook that returns a value.
  */
 
 #define call_void_hook(FUNC, ...)               \
     do {                            \
         struct security_hook_list *P;           \
                                 \
         hlist_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;           \
                                 \
         hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
             RC = P->hook.FUNC(__VA_ARGS__);     \
             if (RC != 0)                \
                 break;              \
         }                       \
     } while (0);                        \
     RC;                         \
 })
 
 /* Security operations */
 
 int security_binder_set_context_mgr(const struct cred *mgr)
 {
     return call_int_hook(binder_set_context_mgr, 0, mgr);
 }
 
 int security_binder_transaction(const struct cred *from,
                 const struct cred *to)
 {
     return call_int_hook(binder_transaction, 0, from, to);
 }
 
 int security_binder_transfer_binder(const struct cred *from,
                     const struct cred *to)
 {
     return call_int_hook(binder_transfer_binder, 0, from, to);
 }
 
 int security_binder_transfer_file(const struct cred *from,
                   const struct cred *to, struct file *file)
 {
     return call_int_hook(binder_transfer_file, 0, from, to, file);
 }
 
 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
 {
     return call_int_hook(ptrace_access_check, 0, child, mode);
 }
 
 int security_ptrace_traceme(struct task_struct *parent)
 {
     return call_int_hook(ptrace_traceme, 0, parent);
 }
 
 int security_capget(struct task_struct *target,
              kernel_cap_t *effective,
              kernel_cap_t *inheritable,
              kernel_cap_t *permitted)
 {
     return call_int_hook(capget, 0, target,
                 effective, inheritable, permitted);
 }
 
 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)
 {
     return call_int_hook(capset, 0, new, old,
                 effective, inheritable, permitted);
 }
 
 int security_capable(const struct cred *cred,
              struct user_namespace *ns,
              int cap,
              unsigned int opts)
 {
     return call_int_hook(capable, 0, cred, ns, cap, opts);
 }
 
 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
 {
     return call_int_hook(quotactl, 0, cmds, type, id, sb);
 }
 
 int security_quota_on(struct dentry *dentry)
 {
     return call_int_hook(quota_on, 0, dentry);
 }
 
 int security_syslog(int type)
 {
     return call_int_hook(syslog, 0, type);
 }
 
 int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
 {
     return call_int_hook(settime, 0, ts, tz);
 }
 
 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
 {
     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.
      */
     hlist_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);
 }
 
 int security_bprm_creds_for_exec(struct linux_binprm *bprm)
 {
     return call_int_hook(bprm_creds_for_exec, 0, bprm);
 }
 
 int security_bprm_creds_from_file(struct linux_binprm *bprm, struct file *file)
 {
     return call_int_hook(bprm_creds_from_file, 0, bprm, file);
 }
 
 int security_bprm_check(struct linux_binprm *bprm)
 {
     int ret;
 
     ret = call_int_hook(bprm_check_security, 0, bprm);
     if (ret)
         return ret;
     return ima_bprm_check(bprm);
 }
 
 void security_bprm_committing_creds(struct linux_binprm *bprm)
 {
     call_void_hook(bprm_committing_creds, bprm);
 }
 
 void security_bprm_committed_creds(struct linux_binprm *bprm)
 {
     call_void_hook(bprm_committed_creds, bprm);
 }
 
 int security_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)
 {
     return call_int_hook(fs_context_dup, 0, fc, src_fc);
 }
 
 int security_fs_context_parse_param(struct fs_context *fc,
                     struct fs_parameter *param)
 {
     struct security_hook_list *hp;
     int trc;
     int rc = -ENOPARAM;
 
     hlist_for_each_entry(hp, &security_hook_heads.fs_context_parse_param,
                  list) {
         trc = hp->hook.fs_context_parse_param(fc, param);
         if (trc == 0)
             rc = 0;
         else if (trc != -ENOPARAM)
             return trc;
     }
     return rc;
 }
 
 int security_sb_alloc(struct super_block *sb)
 {
     int rc = lsm_superblock_alloc(sb);
 
     if (unlikely(rc))
         return rc;
     rc = call_int_hook(sb_alloc_security, 0, sb);
     if (unlikely(rc))
         security_sb_free(sb);
     return rc;
 }
 
 void security_sb_delete(struct super_block *sb)
 {
     call_void_hook(sb_delete, sb);
 }
 
 void security_sb_free(struct super_block *sb)
 {
     call_void_hook(sb_free_security, sb);
     kfree(sb->s_security);
     sb->s_security = NULL;
 }
 
 void security_free_mnt_opts(void **mnt_opts)
 {
     if (!*mnt_opts)
         return;
     call_void_hook(sb_free_mnt_opts, *mnt_opts);
     *mnt_opts = NULL;
 }
 EXPORT_SYMBOL(security_free_mnt_opts);
 
 int security_sb_eat_lsm_opts(char *options, void **mnt_opts)
 {
     return call_int_hook(sb_eat_lsm_opts, 0, options, mnt_opts);
 }
 EXPORT_SYMBOL(security_sb_eat_lsm_opts);
 
 int security_sb_mnt_opts_compat(struct super_block *sb,
                 void *mnt_opts)
 {
     return call_int_hook(sb_mnt_opts_compat, 0, sb, mnt_opts);
 }
 EXPORT_SYMBOL(security_sb_mnt_opts_compat);
 
 int security_sb_remount(struct super_block *sb,
             void *mnt_opts)
 {
     return call_int_hook(sb_remount, 0, sb, mnt_opts);
 }
 EXPORT_SYMBOL(security_sb_remount);
 
 int security_sb_kern_mount(struct super_block *sb)
 {
     return call_int_hook(sb_kern_mount, 0, sb);
 }
 
 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
 {
     return call_int_hook(sb_show_options, 0, m, sb);
 }
 
 int security_sb_statfs(struct dentry *dentry)
 {
     return call_int_hook(sb_statfs, 0, dentry);
 }
 
 int security_sb_mount(const char *dev_name, const struct path *path,
                        const char *type, unsigned long flags, void *data)
 {
     return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
 }
 
 int security_sb_umount(struct vfsmount *mnt, int flags)
 {
     return call_int_hook(sb_umount, 0, mnt, flags);
 }
 
 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
 {
     return call_int_hook(sb_pivotroot, 0, old_path, new_path);
 }
 
 int security_sb_set_mnt_opts(struct super_block *sb,
                 void *mnt_opts,
                 unsigned long kern_flags,
                 unsigned long *set_kern_flags)
 {
     return call_int_hook(sb_set_mnt_opts,
                 mnt_opts ? -EOPNOTSUPP : 0, sb,
                 mnt_opts, kern_flags, set_kern_flags);
 }
 EXPORT_SYMBOL(security_sb_set_mnt_opts);
 
 int security_sb_clone_mnt_opts(const struct super_block *oldsb,
                 struct super_block *newsb,
                 unsigned long kern_flags,
                 unsigned long *set_kern_flags)
 {
     return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb,
                 kern_flags, set_kern_flags);
 }
 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
 
 int security_move_mount(const struct path *from_path, const struct path *to_path)
 {
     return call_int_hook(move_mount, 0, from_path, to_path);
 }
 
 int security_path_notify(const struct path *path, u64 mask,
                 unsigned int obj_type)
 {
     return call_int_hook(path_notify, 0, path, mask, obj_type);
 }
 
 int security_inode_alloc(struct inode *inode)
 {
     int rc = lsm_inode_alloc(inode);
 
     if (unlikely(rc))
         return rc;
     rc = call_int_hook(inode_alloc_security, 0, inode);
     if (unlikely(rc))
         security_inode_free(inode);
     return rc;
 }
 
 static void inode_free_by_rcu(struct rcu_head *head)
 {
     /*
      * The rcu head is at the start of the inode blob
      */
     kmem_cache_free(lsm_inode_cache, head);
 }
 
 void security_inode_free(struct inode *inode)
 {
     integrity_inode_free(inode);
     call_void_hook(inode_free_security, inode);
     /*
      * The inode may still be referenced in a path walk and
      * a call to security_inode_permission() can be made
      * after inode_free_security() is called. Ideally, the VFS
      * wouldn't do this, but fixing that is a much harder
      * job. For now, simply free the i_security via RCU, and
      * leave the current inode->i_security pointer intact.
      * The inode will be freed after the RCU grace period too.
      */
     if (inode->i_security)
         call_rcu((struct rcu_head *)inode->i_security,
                 inode_free_by_rcu);
 }
 
 int security_dentry_init_security(struct dentry *dentry, int mode,
                   const struct qstr *name,
                   const char **xattr_name, void **ctx,
                   u32 *ctxlen)
 {
     struct security_hook_list *hp;
     int rc;
 
     /*
      * Only one module will provide a security context.
      */
     hlist_for_each_entry(hp, &security_hook_heads.dentry_init_security, list) {
         rc = hp->hook.dentry_init_security(dentry, mode, name,
                            xattr_name, ctx, ctxlen);
         if (rc != LSM_RET_DEFAULT(dentry_init_security))
             return rc;
     }
     return LSM_RET_DEFAULT(dentry_init_security);
 }
 EXPORT_SYMBOL(security_dentry_init_security);
 
 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);
 
 int security_inode_init_security(struct inode *inode, struct inode *dir,
                  const struct qstr *qstr,
                  const initxattrs initxattrs, void *fs_data)
 {
     struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
     struct xattr *lsm_xattr, *evm_xattr, *xattr;
     int ret;
 
     if (unlikely(IS_PRIVATE(inode)))
         return 0;
 
     if (!initxattrs)
         return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
                      dir, qstr, NULL, NULL, NULL);
     memset(new_xattrs, 0, sizeof(new_xattrs));
     lsm_xattr = new_xattrs;
     ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
                         &lsm_xattr->name,
                         &lsm_xattr->value,
                         &lsm_xattr->value_len);
     if (ret)
         goto out;
 
     evm_xattr = lsm_xattr + 1;
     ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
     if (ret)
         goto out;
     ret = initxattrs(inode, new_xattrs, fs_data);
 out:
     for (xattr = new_xattrs; xattr->value != NULL; xattr++)
         kfree(xattr->value);
     return (ret == -EOPNOTSUPP) ? 0 : ret;
 }
 EXPORT_SYMBOL(security_inode_init_security);
 
 int security_inode_init_security_anon(struct inode *inode,
                       const struct qstr *name,
                       const struct inode *context_inode)
 {
     return call_int_hook(inode_init_security_anon, 0, inode, name,
                  context_inode);
 }
 
 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
                      const struct qstr *qstr, const char **name,
                      void **value, size_t *len)
 {
     if (unlikely(IS_PRIVATE(inode)))
         return -EOPNOTSUPP;
     return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
                  qstr, name, value, len);
 }
 EXPORT_SYMBOL(security_old_inode_init_security);
 
 #ifdef CONFIG_SECURITY_PATH
 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
             unsigned int dev)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
         return 0;
     return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
 }
 EXPORT_SYMBOL(security_path_mknod);
 
 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
         return 0;
     return call_int_hook(path_mkdir, 0, dir, dentry, mode);
 }
 EXPORT_SYMBOL(security_path_mkdir);
 
 int security_path_rmdir(const struct path *dir, struct dentry *dentry)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
         return 0;
     return call_int_hook(path_rmdir, 0, dir, dentry);
 }
 
 int security_path_unlink(const struct path *dir, struct dentry *dentry)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
         return 0;
     return call_int_hook(path_unlink, 0, dir, dentry);
 }
 EXPORT_SYMBOL(security_path_unlink);
 
 int security_path_symlink(const struct path *dir, struct dentry *dentry,
               const char *old_name)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
         return 0;
     return call_int_hook(path_symlink, 0, dir, dentry, old_name);
 }
 
 int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
                struct dentry *new_dentry)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
         return 0;
     return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
 }
 
 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
              const struct path *new_dir, struct dentry *new_dentry,
              unsigned int flags)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
              (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
         return 0;
 
     return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
                 new_dentry, flags);
 }
 EXPORT_SYMBOL(security_path_rename);
 
 int security_path_truncate(const struct path *path)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
         return 0;
     return call_int_hook(path_truncate, 0, path);
 }
 
 int security_path_chmod(const struct path *path, umode_t mode)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
         return 0;
     return call_int_hook(path_chmod, 0, path, mode);
 }
 
 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
         return 0;
     return call_int_hook(path_chown, 0, path, uid, gid);
 }
 
 int security_path_chroot(const struct path *path)
 {
     return call_int_hook(path_chroot, 0, path);
 }
 #endif
 
 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
 {
     if (unlikely(IS_PRIVATE(dir)))
         return 0;
     return call_int_hook(inode_create, 0, dir, dentry, mode);
 }
 EXPORT_SYMBOL_GPL(security_inode_create);
 
 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
              struct dentry *new_dentry)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
         return 0;
     return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
 }
 
 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
         return 0;
     return call_int_hook(inode_unlink, 0, dir, dentry);
 }
 
 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
                 const char *old_name)
 {
     if (unlikely(IS_PRIVATE(dir)))
         return 0;
     return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
 }
 
 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 {
     if (unlikely(IS_PRIVATE(dir)))
         return 0;
     return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
 }
 EXPORT_SYMBOL_GPL(security_inode_mkdir);
 
 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
         return 0;
     return call_int_hook(inode_rmdir, 0, dir, dentry);
 }
 
 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
 {
     if (unlikely(IS_PRIVATE(dir)))
         return 0;
     return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
 }
 
 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
                struct inode *new_dir, struct dentry *new_dentry,
                unsigned int flags)
 {
         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
             (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
         return 0;
 
     if (flags & RENAME_EXCHANGE) {
         int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
                              old_dir, old_dentry);
         if (err)
             return err;
     }
 
     return call_int_hook(inode_rename, 0, old_dir, old_dentry,
                        new_dir, new_dentry);
 }
 
 int security_inode_readlink(struct dentry *dentry)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
         return 0;
     return call_int_hook(inode_readlink, 0, dentry);
 }
 
 int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
                    bool rcu)
 {
     if (unlikely(IS_PRIVATE(inode)))
         return 0;
     return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
 }
 
 int security_inode_permission(struct inode *inode, int mask)
 {
     if (unlikely(IS_PRIVATE(inode)))
         return 0;
     return call_int_hook(inode_permission, 0, inode, mask);
 }
 
 int security_inode_setattr(struct user_namespace *mnt_userns,
                struct dentry *dentry, struct iattr *attr)
 {
     int ret;
 
     if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
         return 0;
     ret = call_int_hook(inode_setattr, 0, dentry, attr);
     if (ret)
         return ret;
     return evm_inode_setattr(mnt_userns, dentry, attr);
 }
 EXPORT_SYMBOL_GPL(security_inode_setattr);
 
 int security_inode_getattr(const struct path *path)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
         return 0;
     return call_int_hook(inode_getattr, 0, path);
 }
 
 int security_inode_setxattr(struct user_namespace *mnt_userns,
                 struct dentry *dentry, const char *name,
                 const void *value, size_t size, int flags)
 {
     int ret;
 
     if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
         return 0;
     /*
      * SELinux and Smack integrate the cap call,
      * so assume that all LSMs supplying this call do so.
      */
     ret = call_int_hook(inode_setxattr, 1, mnt_userns, dentry, name, value,
                 size, flags);
 
     if (ret == 1)
         ret = cap_inode_setxattr(dentry, name, value, size, flags);
     if (ret)
         return ret;
     ret = ima_inode_setxattr(dentry, name, value, size);
     if (ret)
         return ret;
     return evm_inode_setxattr(mnt_userns, dentry, name, value, size);
 }
 
 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
                   const void *value, size_t size, int flags)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
         return;
     call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
     evm_inode_post_setxattr(dentry, name, value, size);
 }
 
 int security_inode_getxattr(struct dentry *dentry, const char *name)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
         return 0;
     return call_int_hook(inode_getxattr, 0, dentry, name);
 }
 
 int security_inode_listxattr(struct dentry *dentry)
 {
     if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
         return 0;
     return call_int_hook(inode_listxattr, 0, dentry);
 }
 
 int security_inode_removexattr(struct user_namespace *mnt_userns,
                    struct dentry *dentry, const char *name)
 {
     int ret;
 
     if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
         return 0;
     /*
      * SELinux and Smack integrate the cap call,
      * so assume that all LSMs supplying this call do so.
      */
     ret = call_int_hook(inode_removexattr, 1, mnt_userns, dentry, name);
     if (ret == 1)
         ret = cap_inode_removexattr(mnt_userns, dentry, name);
     if (ret)
         return ret;
     ret = ima_inode_removexattr(dentry, name);
     if (ret)
         return ret;
     return evm_inode_removexattr(mnt_userns, dentry, name);
 }
 
 int security_inode_need_killpriv(struct dentry *dentry)
 {
     return call_int_hook(inode_need_killpriv, 0, dentry);
 }
 
 int security_inode_killpriv(struct user_namespace *mnt_userns,
                 struct dentry *dentry)
 {
     return call_int_hook(inode_killpriv, 0, mnt_userns, dentry);
 }
 
 int security_inode_getsecurity(struct user_namespace *mnt_userns,
                    struct inode *inode, const char *name,
                    void **buffer, bool alloc)
 {
     struct security_hook_list *hp;
     int rc;
 
     if (unlikely(IS_PRIVATE(inode)))
         return LSM_RET_DEFAULT(inode_getsecurity);
     /*
      * Only one module will provide an attribute with a given name.
      */
     hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
         rc = hp->hook.inode_getsecurity(mnt_userns, inode, name, buffer, alloc);
         if (rc != LSM_RET_DEFAULT(inode_getsecurity))
             return rc;
     }
     return LSM_RET_DEFAULT(inode_getsecurity);
 }
 
 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
 {
     struct security_hook_list *hp;
     int rc;
 
     if (unlikely(IS_PRIVATE(inode)))
         return LSM_RET_DEFAULT(inode_setsecurity);
     /*
      * Only one module will provide an attribute with a given name.
      */
     hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
         rc = hp->hook.inode_setsecurity(inode, name, value, size,
                                 flags);
         if (rc != LSM_RET_DEFAULT(inode_setsecurity))
             return rc;
     }
     return LSM_RET_DEFAULT(inode_setsecurity);
 }
 
 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
 {
     if (unlikely(IS_PRIVATE(inode)))
         return 0;
     return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
 }
 EXPORT_SYMBOL(security_inode_listsecurity);
 
 void security_inode_getsecid(struct inode *inode, u32 *secid)
 {
     call_void_hook(inode_getsecid, inode, secid);
 }
 
 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);
 
 int security_inode_copy_up_xattr(const char *name)
 {
     struct security_hook_list *hp;
     int rc;
 
     /*
      * The implementation can return 0 (accept the xattr), 1 (discard the
      * xattr), -EOPNOTSUPP if it does not know anything about the xattr or
      * any other error code incase of an error.
      */
     hlist_for_each_entry(hp,
         &security_hook_heads.inode_copy_up_xattr, list) {
         rc = hp->hook.inode_copy_up_xattr(name);
         if (rc != LSM_RET_DEFAULT(inode_copy_up_xattr))
             return rc;
     }
 
     return LSM_RET_DEFAULT(inode_copy_up_xattr);
 }
 EXPORT_SYMBOL(security_inode_copy_up_xattr);
 
 int security_kernfs_init_security(struct kernfs_node *kn_dir,
                   struct kernfs_node *kn)
 {
     return call_int_hook(kernfs_init_security, 0, kn_dir, kn);
 }
 
 int security_file_permission(struct file *file, int mask)
 {
     int ret;
 
     ret = call_int_hook(file_permission, 0, file, mask);
     if (ret)
         return ret;
 
     return fsnotify_perm(file, mask);
 }
 
 int security_file_alloc(struct file *file)
 {
     int rc = lsm_file_alloc(file);
 
     if (rc)
         return rc;
     rc = call_int_hook(file_alloc_security, 0, file);
     if (unlikely(rc))
         security_file_free(file);
     return rc;
 }
 
 void security_file_free(struct file *file)
 {
     void *blob;
 
     call_void_hook(file_free_security, file);
 
     blob = file->f_security;
     if (blob) {
         file->f_security = NULL;
         kmem_cache_free(lsm_file_cache, blob);
     }
 }
 
 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
     return call_int_hook(file_ioctl, 0, file, cmd, arg);
 }
 EXPORT_SYMBOL_GPL(security_file_ioctl);
 
 static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
 {
     /*
      * Does we have PROT_READ and does the application expect
      * it to imply PROT_EXEC?  If not, nothing to talk about...
      */
     if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
         return prot;
     if (!(current->personality & READ_IMPLIES_EXEC))
         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
      * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
      */
     if (!path_noexec(&file->f_path)) {
 #ifndef CONFIG_MMU
         if (file->f_op->mmap_capabilities) {
             unsigned caps = file->f_op->mmap_capabilities(file);
             if (!(caps & NOMMU_MAP_EXEC))
                 return prot;
         }
 #endif
         return prot | PROT_EXEC;
     }
     /* 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;
     ret = call_int_hook(mmap_file, 0, file, prot,
                     mmap_prot(file, prot), flags);
     if (ret)
         return ret;
     return ima_file_mmap(file, prot);
 }
 
 int security_mmap_addr(unsigned long addr)
 {
     return call_int_hook(mmap_addr, 0, addr);
 }
 
 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
                 unsigned long prot)
 {
     int ret;
 
     ret = call_int_hook(file_mprotect, 0, vma, reqprot, prot);
     if (ret)
         return ret;
     return ima_file_mprotect(vma, prot);
 }
 
 int security_file_lock(struct file *file, unsigned int cmd)
 {
     return call_int_hook(file_lock, 0, file, cmd);
 }
 
 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
 {
     return call_int_hook(file_fcntl, 0, file, cmd, arg);
 }
 
 void security_file_set_fowner(struct file *file)
 {
     call_void_hook(file_set_fowner, file);
 }
 
 int security_file_send_sigiotask(struct task_struct *tsk,
                   struct fown_struct *fown, int sig)
 {
     return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
 }
 
 int security_file_receive(struct file *file)
 {
     return call_int_hook(file_receive, 0, file);
 }
 
 int security_file_open(struct file *file)
 {
     int ret;
 
     ret = call_int_hook(file_open, 0, file);
     if (ret)
         return ret;
 
     return fsnotify_perm(file, MAY_OPEN);
 }
 
 int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
 {
     int rc = lsm_task_alloc(task);
 
     if (rc)
         return rc;
     rc = call_int_hook(task_alloc, 0, task, clone_flags);
     if (unlikely(rc))
         security_task_free(task);
     return rc;
 }
 
 void security_task_free(struct task_struct *task)
 {
     call_void_hook(task_free, task);
 
     kfree(task->security);
     task->security = NULL;
 }
 
 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
 {
     int rc = lsm_cred_alloc(cred, gfp);
 
     if (rc)
         return rc;
 
     rc = call_int_hook(cred_alloc_blank, 0, cred, gfp);
     if (unlikely(rc))
         security_cred_free(cred);
     return rc;
 }
 
 void security_cred_free(struct cred *cred)
 {
     /*
      * There is a failure case in prepare_creds() that
      * may result in a call here with ->security being NULL.
      */
     if (unlikely(cred->security == NULL))
         return;
 
     call_void_hook(cred_free, cred);
 
     kfree(cred->security);
     cred->security = NULL;
 }
 
 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
 {
     int rc = lsm_cred_alloc(new, gfp);
 
     if (rc)
         return rc;
 
     rc = call_int_hook(cred_prepare, 0, new, old, gfp);
     if (unlikely(rc))
         security_cred_free(new);
     return rc;
 }
 
 void security_transfer_creds(struct cred *new, const struct cred *old)
 {
     call_void_hook(cred_transfer, new, old);
 }
 
 void security_cred_getsecid(const struct cred *c, u32 *secid)
 {
     *secid = 0;
     call_void_hook(cred_getsecid, c, secid);
 }
 EXPORT_SYMBOL(security_cred_getsecid);
 
 int security_kernel_act_as(struct cred *new, u32 secid)
 {
     return call_int_hook(kernel_act_as, 0, new, secid);
 }
 
 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
 {
     return call_int_hook(kernel_create_files_as, 0, new, inode);
 }
 
 int security_kernel_module_request(char *kmod_name)
 {
     int ret;
 
     ret = call_int_hook(kernel_module_request, 0, kmod_name);
     if (ret)
         return ret;
     return integrity_kernel_module_request(kmod_name);
 }
 
 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id,
                   bool contents)
 {
     int ret;
 
     ret = call_int_hook(kernel_read_file, 0, file, id, contents);
     if (ret)
         return ret;
     return ima_read_file(file, id, contents);
 }
 EXPORT_SYMBOL_GPL(security_kernel_read_file);
 
 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
                    enum kernel_read_file_id id)
 {
     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);
 }
 EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
 
 int security_kernel_load_data(enum kernel_load_data_id id, bool contents)
 {
     int ret;
 
     ret = call_int_hook(kernel_load_data, 0, id, contents);
     if (ret)
         return ret;
     return ima_load_data(id, contents);
 }
 EXPORT_SYMBOL_GPL(security_kernel_load_data);
 
 int security_kernel_post_load_data(char *buf, loff_t size,
                    enum kernel_load_data_id id,
                    char *description)
 {
     int ret;
 
     ret = call_int_hook(kernel_post_load_data, 0, buf, size, id,
                 description);
     if (ret)
         return ret;
     return ima_post_load_data(buf, size, id, description);
 }
 EXPORT_SYMBOL_GPL(security_kernel_post_load_data);
 
 int security_task_fix_setuid(struct cred *new, const struct cred *old,
                  int flags)
 {
     return call_int_hook(task_fix_setuid, 0, new, old, flags);
 }
 
 int security_task_fix_setgid(struct cred *new, const struct cred *old,
                  int flags)
 {
     return call_int_hook(task_fix_setgid, 0, new, old, flags);
 }
 
 int security_task_fix_setgroups(struct cred *new, const struct cred *old)
 {
     return call_int_hook(task_fix_setgroups, 0, new, old);
 }
 
 int security_task_setpgid(struct task_struct *p, pid_t pgid)
 {
     return call_int_hook(task_setpgid, 0, p, pgid);
 }
 
 int security_task_getpgid(struct task_struct *p)
 {
     return call_int_hook(task_getpgid, 0, p);
 }
 
 int security_task_getsid(struct task_struct *p)
 {
     return call_int_hook(task_getsid, 0, p);
 }
 
 void security_current_getsecid_subj(u32 *secid)
 {
     *secid = 0;
     call_void_hook(current_getsecid_subj, secid);
 }
 EXPORT_SYMBOL(security_current_getsecid_subj);
 
 void security_task_getsecid_obj(struct task_struct *p, u32 *secid)
 {
     *secid = 0;
     call_void_hook(task_getsecid_obj, p, secid);
 }
 EXPORT_SYMBOL(security_task_getsecid_obj);
 
 int security_task_setnice(struct task_struct *p, int nice)
 {
     return call_int_hook(task_setnice, 0, p, nice);
 }
 
 int security_task_setioprio(struct task_struct *p, int ioprio)
 {
     return call_int_hook(task_setioprio, 0, p, ioprio);
 }
 
 int security_task_getioprio(struct task_struct *p)
 {
     return call_int_hook(task_getioprio, 0, p);
 }
 
 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);
 }
 
 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
         struct rlimit *new_rlim)
 {
     return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
 }
 
 int security_task_setscheduler(struct task_struct *p)
 {
     return call_int_hook(task_setscheduler, 0, p);
 }
 
 int security_task_getscheduler(struct task_struct *p)
 {
     return call_int_hook(task_getscheduler, 0, p);
 }
 
 int security_task_movememory(struct task_struct *p)
 {
     return call_int_hook(task_movememory, 0, p);
 }
 
 int security_task_kill(struct task_struct *p, struct kernel_siginfo *info,
             int sig, const struct cred *cred)
 {
     return call_int_hook(task_kill, 0, p, info, sig, cred);
 }
 
 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
              unsigned long arg4, unsigned long arg5)
 {
     int thisrc;
     int rc = LSM_RET_DEFAULT(task_prctl);
     struct security_hook_list *hp;
 
     hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
         thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
         if (thisrc != LSM_RET_DEFAULT(task_prctl)) {
             rc = thisrc;
             if (thisrc != 0)
                 break;
         }
     }
     return rc;
 }
 
 void security_task_to_inode(struct task_struct *p, struct inode *inode)
 {
     call_void_hook(task_to_inode, p, inode);
 }
 
 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
 {
     return call_int_hook(ipc_permission, 0, ipcp, flag);
 }
 
 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
 {
     *secid = 0;
     call_void_hook(ipc_getsecid, ipcp, secid);
 }
 
 int security_msg_msg_alloc(struct msg_msg *msg)
 {
     int rc = lsm_msg_msg_alloc(msg);
 
     if (unlikely(rc))
         return rc;
     rc = call_int_hook(msg_msg_alloc_security, 0, msg);
     if (unlikely(rc))
         security_msg_msg_free(msg);
     return rc;
 }
 
 void security_msg_msg_free(struct msg_msg *msg)
 {
     call_void_hook(msg_msg_free_security, msg);
     kfree(msg->security);
     msg->security = NULL;
 }
 
 int security_msg_queue_alloc(struct kern_ipc_perm *msq)
 {
     int rc = lsm_ipc_alloc(msq);
 
     if (unlikely(rc))
         return rc;
     rc = call_int_hook(msg_queue_alloc_security, 0, msq);
     if (unlikely(rc))
         security_msg_queue_free(msq);
     return rc;
 }
 
 void security_msg_queue_free(struct kern_ipc_perm *msq)
 {
     call_void_hook(msg_queue_free_security, msq);
     kfree(msq->security);
     msq->security = NULL;
 }
 
 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
 {
     return call_int_hook(msg_queue_associate, 0, msq, msqflg);
 }
 
 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
 {
     return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
 }
 
 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
                    struct msg_msg *msg, int msqflg)
 {
     return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
 }
 
 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
                    struct task_struct *target, long type, int mode)
 {
     return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
 }
 
 int security_shm_alloc(struct kern_ipc_perm *shp)
 {
     int rc = lsm_ipc_alloc(shp);
 
     if (unlikely(rc))
         return rc;
     rc = call_int_hook(shm_alloc_security, 0, shp);
     if (unlikely(rc))
         security_shm_free(shp);
     return rc;
 }
 
 void security_shm_free(struct kern_ipc_perm *shp)
 {
     call_void_hook(shm_free_security, shp);
     kfree(shp->security);
     shp->security = NULL;
 }
 
 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg)
 {
     return call_int_hook(shm_associate, 0, shp, shmflg);
 }
 
 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
 {
     return call_int_hook(shm_shmctl, 0, shp, cmd);
 }
 
 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg)
 {
     return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
 }
 
 int security_sem_alloc(struct kern_ipc_perm *sma)
 {
     int rc = lsm_ipc_alloc(sma);
 
     if (unlikely(rc))
         return rc;
     rc = call_int_hook(sem_alloc_security, 0, sma);
     if (unlikely(rc))
         security_sem_free(sma);
     return rc;
 }
 
 void security_sem_free(struct kern_ipc_perm *sma)
 {
     call_void_hook(sem_free_security, sma);
     kfree(sma->security);
     sma->security = NULL;
 }
 
 int security_sem_associate(struct kern_ipc_perm *sma, int semflg)
 {
     return call_int_hook(sem_associate, 0, sma, semflg);
 }
 
 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd)
 {
     return call_int_hook(sem_semctl, 0, sma, cmd);
 }
 
 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
             unsigned nsops, int alter)
 {
     return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
 }
 
 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
 {
     if (unlikely(inode && IS_PRIVATE(inode)))
         return;
     call_void_hook(d_instantiate, dentry, inode);
 }
 EXPORT_SYMBOL(security_d_instantiate);
 
 int security_getprocattr(struct task_struct *p, const char *lsm, char *name,
                 char **value)
 {
     struct security_hook_list *hp;
 
     hlist_for_each_entry(hp, &security_hook_heads.getprocattr, list) {
         if (lsm != NULL && strcmp(lsm, hp->lsm))
             continue;
         return hp->hook.getprocattr(p, name, value);
     }
     return LSM_RET_DEFAULT(getprocattr);
 }
 
 int security_setprocattr(const char *lsm, const char *name, void *value,
              size_t size)
 {
     struct security_hook_list *hp;
 
     hlist_for_each_entry(hp, &security_hook_heads.setprocattr, list) {
         if (lsm != NULL && strcmp(lsm, hp->lsm))
             continue;
         return hp->hook.setprocattr(name, value, size);
     }
     return LSM_RET_DEFAULT(setprocattr);
 }
 
 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
 {
     return call_int_hook(netlink_send, 0, sk, skb);
 }
 
 int security_ismaclabel(const char *name)
 {
     return call_int_hook(ismaclabel, 0, name);
 }
 EXPORT_SYMBOL(security_ismaclabel);
 
 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
 {
     struct security_hook_list *hp;
     int rc;
 
     /*
      * Currently, only one LSM can implement secid_to_secctx (i.e this
      * LSM hook is not "stackable").
      */
     hlist_for_each_entry(hp, &security_hook_heads.secid_to_secctx, list) {
         rc = hp->hook.secid_to_secctx(secid, secdata, seclen);
         if (rc != LSM_RET_DEFAULT(secid_to_secctx))
             return rc;
     }
 
     return LSM_RET_DEFAULT(secid_to_secctx);
 }
 EXPORT_SYMBOL(security_secid_to_secctx);
 
 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
 {
     *secid = 0;
     return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
 }
 EXPORT_SYMBOL(security_secctx_to_secid);
 
 void security_release_secctx(char *secdata, u32 seclen)
 {
     call_void_hook(release_secctx, secdata, seclen);
 }
 EXPORT_SYMBOL(security_release_secctx);
 
 void security_inode_invalidate_secctx(struct inode *inode)
 {
     call_void_hook(inode_invalidate_secctx, inode);
 }
 EXPORT_SYMBOL(security_inode_invalidate_secctx);
 
 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
 {
     return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
 }
 EXPORT_SYMBOL(security_inode_notifysecctx);
 
 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
 {
     return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
 }
 EXPORT_SYMBOL(security_inode_setsecctx);
 
 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
 {
     return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
 }
 EXPORT_SYMBOL(security_inode_getsecctx);
 
 #ifdef CONFIG_WATCH_QUEUE
 int security_post_notification(const struct cred *w_cred,
                    const struct cred *cred,
                    struct watch_notification *n)
 {
     return call_int_hook(post_notification, 0, w_cred, cred, n);
 }
 #endif /* CONFIG_WATCH_QUEUE */
 
 #ifdef CONFIG_KEY_NOTIFICATIONS
 int security_watch_key(struct key *key)
 {
     return call_int_hook(watch_key, 0, key);
 }
 #endif
 
 #ifdef CONFIG_SECURITY_NETWORK
 
 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
 {
     return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
 }
 EXPORT_SYMBOL(security_unix_stream_connect);
 
 int security_unix_may_send(struct socket *sock,  struct socket *other)
 {
     return call_int_hook(unix_may_send, 0, sock, other);
 }
 EXPORT_SYMBOL(security_unix_may_send);
 
 int security_socket_create(int family, int type, int protocol, int kern)
 {
     return call_int_hook(socket_create, 0, family, type, protocol, kern);
 }
 
 int security_socket_post_create(struct socket *sock, int family,
                 int type, int protocol, int kern)
 {
     return call_int_hook(socket_post_create, 0, sock, family, type,
                         protocol, kern);
 }
 
 int security_socket_socketpair(struct socket *socka, struct socket *sockb)
 {
     return call_int_hook(socket_socketpair, 0, socka, sockb);
 }
 EXPORT_SYMBOL(security_socket_socketpair);
 
 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
 {
     return call_int_hook(socket_bind, 0, sock, address, addrlen);
 }
 
 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
 {
     return call_int_hook(socket_connect, 0, sock, address, addrlen);
 }
 
 int security_socket_listen(struct socket *sock, int backlog)
 {
     return call_int_hook(socket_listen, 0, sock, backlog);
 }
 
 int security_socket_accept(struct socket *sock, struct socket *newsock)
 {
     return call_int_hook(socket_accept, 0, sock, newsock);
 }
 
 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
 {
     return call_int_hook(socket_sendmsg, 0, sock, msg, size);
 }
 
 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
                 int size, int flags)
 {
     return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
 }
 
 int security_socket_getsockname(struct socket *sock)
 {
     return call_int_hook(socket_getsockname, 0, sock);
 }
 
 int security_socket_getpeername(struct socket *sock)
 {
     return call_int_hook(socket_getpeername, 0, sock);
 }
 
 int security_socket_getsockopt(struct socket *sock, int level, int optname)
 {
     return call_int_hook(socket_getsockopt, 0, sock, level, optname);
 }
 
 int security_socket_setsockopt(struct socket *sock, int level, int optname)
 {
     return call_int_hook(socket_setsockopt, 0, sock, level, optname);
 }
 
 int security_socket_shutdown(struct socket *sock, int how)
 {
     return call_int_hook(socket_shutdown, 0, sock, how);
 }
 
 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
 {
     return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
 }
 EXPORT_SYMBOL(security_sock_rcv_skb);
 
 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
                       int __user *optlen, unsigned len)
 {
     return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
                 optval, optlen, len);
 }
 
 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
 {
     return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
                  skb, secid);
 }
 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
 
 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
 {
     return call_int_hook(sk_alloc_security, 0, sk, family, priority);
 }
 
 void security_sk_free(struct sock *sk)
 {
     call_void_hook(sk_free_security, sk);
 }
 
 void security_sk_clone(const struct sock *sk, struct sock *newsk)
 {
     call_void_hook(sk_clone_security, sk, newsk);
 }
 EXPORT_SYMBOL(security_sk_clone);
 
 void security_sk_classify_flow(struct sock *sk, struct flowi_common *flic)
 {
     call_void_hook(sk_getsecid, sk, &flic->flowic_secid);
 }
 EXPORT_SYMBOL(security_sk_classify_flow);
 
 void security_req_classify_flow(const struct request_sock *req,
                 struct flowi_common *flic)
 {
     call_void_hook(req_classify_flow, req, flic);
 }
 EXPORT_SYMBOL(security_req_classify_flow);
 
 void security_sock_graft(struct sock *sk, struct socket *parent)
 {
     call_void_hook(sock_graft, sk, parent);
 }
 EXPORT_SYMBOL(security_sock_graft);
 
 int security_inet_conn_request(const struct sock *sk,
             struct sk_buff *skb, struct request_sock *req)
 {
     return call_int_hook(inet_conn_request, 0, sk, skb, req);
 }
 EXPORT_SYMBOL(security_inet_conn_request);
 
 void security_inet_csk_clone(struct sock *newsk,
             const struct request_sock *req)
 {
     call_void_hook(inet_csk_clone, newsk, req);
 }
 
 void security_inet_conn_established(struct sock *sk,
             struct sk_buff *skb)
 {
     call_void_hook(inet_conn_established, sk, skb);
 }
 EXPORT_SYMBOL(security_inet_conn_established);
 
 int security_secmark_relabel_packet(u32 secid)
 {
     return call_int_hook(secmark_relabel_packet, 0, secid);
 }
 EXPORT_SYMBOL(security_secmark_relabel_packet);
 
 void security_secmark_refcount_inc(void)
 {
     call_void_hook(secmark_refcount_inc);
 }
 EXPORT_SYMBOL(security_secmark_refcount_inc);
 
 void security_secmark_refcount_dec(void)
 {
     call_void_hook(secmark_refcount_dec);
 }
 EXPORT_SYMBOL(security_secmark_refcount_dec);
 
 int security_tun_dev_alloc_security(void **security)
 {
     return call_int_hook(tun_dev_alloc_security, 0, security);
 }
 EXPORT_SYMBOL(security_tun_dev_alloc_security);
 
 void security_tun_dev_free_security(void *security)
 {
     call_void_hook(tun_dev_free_security, security);
 }
 EXPORT_SYMBOL(security_tun_dev_free_security);
 
 int security_tun_dev_create(void)
 {
     return call_int_hook(tun_dev_create, 0);
 }
 EXPORT_SYMBOL(security_tun_dev_create);
 
 int security_tun_dev_attach_queue(void *security)
 {
     return call_int_hook(tun_dev_attach_queue, 0, security);
 }
 EXPORT_SYMBOL(security_tun_dev_attach_queue);
 
 int security_tun_dev_attach(struct sock *sk, void *security)
 {
     return call_int_hook(tun_dev_attach, 0, sk, security);
 }
 EXPORT_SYMBOL(security_tun_dev_attach);
 
 int security_tun_dev_open(void *security)
 {
     return call_int_hook(tun_dev_open, 0, security);
 }
 EXPORT_SYMBOL(security_tun_dev_open);
 
 int security_sctp_assoc_request(struct sctp_association *asoc, struct sk_buff *skb)
 {
     return call_int_hook(sctp_assoc_request, 0, asoc, skb);
 }
 EXPORT_SYMBOL(security_sctp_assoc_request);
 
 int security_sctp_bind_connect(struct sock *sk, int optname,
                    struct sockaddr *address, int addrlen)
 {
     return call_int_hook(sctp_bind_connect, 0, sk, optname,
                  address, addrlen);
 }
 EXPORT_SYMBOL(security_sctp_bind_connect);
 
 void security_sctp_sk_clone(struct sctp_association *asoc, struct sock *sk,
                 struct sock *newsk)
 {
     call_void_hook(sctp_sk_clone, asoc, sk, newsk);
 }
 EXPORT_SYMBOL(security_sctp_sk_clone);
 
 int security_sctp_assoc_established(struct sctp_association *asoc,
                     struct sk_buff *skb)
 {
     return call_int_hook(sctp_assoc_established, 0, asoc, skb);
 }
 EXPORT_SYMBOL(security_sctp_assoc_established);
 
 #endif  /* CONFIG_SECURITY_NETWORK */
 
 #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);
 
 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);
 
 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 */
 
 #ifdef CONFIG_SECURITY_NETWORK_XFRM
 
 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
                    struct xfrm_user_sec_ctx *sec_ctx,
                    gfp_t gfp)
 {
     return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
 }
 EXPORT_SYMBOL(security_xfrm_policy_alloc);
 
 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
                   struct xfrm_sec_ctx **new_ctxp)
 {
     return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
 }
 
 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
 {
     call_void_hook(xfrm_policy_free_security, ctx);
 }
 EXPORT_SYMBOL(security_xfrm_policy_free);
 
 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
 {
     return call_int_hook(xfrm_policy_delete_security, 0, ctx);
 }
 
 int security_xfrm_state_alloc(struct xfrm_state *x,
                   struct xfrm_user_sec_ctx *sec_ctx)
 {
     return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
 }
 EXPORT_SYMBOL(security_xfrm_state_alloc);
 
 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
                       struct xfrm_sec_ctx *polsec, u32 secid)
 {
     return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
 }
 
 int security_xfrm_state_delete(struct xfrm_state *x)
 {
     return call_int_hook(xfrm_state_delete_security, 0, x);
 }
 EXPORT_SYMBOL(security_xfrm_state_delete);
 
 void security_xfrm_state_free(struct xfrm_state *x)
 {
     call_void_hook(xfrm_state_free_security, x);
 }
 
 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid)
 {
     return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid);
 }
 
 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
                        struct xfrm_policy *xp,
                        const struct flowi_common *flic)
 {
     struct security_hook_list *hp;
     int rc = LSM_RET_DEFAULT(xfrm_state_pol_flow_match);
 
     /*
      * 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
      */
     hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
                 list) {
         rc = hp->hook.xfrm_state_pol_flow_match(x, xp, flic);
         break;
     }
     return rc;
 }
 
 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
 {
     return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
 }
 
 void security_skb_classify_flow(struct sk_buff *skb, struct flowi_common *flic)
 {
     int rc = call_int_hook(xfrm_decode_session, 0, skb, &flic->flowic_secid,
                 0);
 
     BUG_ON(rc);
 }
 EXPORT_SYMBOL(security_skb_classify_flow);
 
 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
 
 #ifdef CONFIG_KEYS
 
 int security_key_alloc(struct key *key, const struct cred *cred,
                unsigned long flags)
 {
     return call_int_hook(key_alloc, 0, key, cred, flags);
 }
 
 void security_key_free(struct key *key)
 {
     call_void_hook(key_free, key);
 }
 
 int security_key_permission(key_ref_t key_ref, const struct cred *cred,
                 enum key_need_perm need_perm)
 {
     return call_int_hook(key_permission, 0, key_ref, cred, need_perm);
 }
 
 int security_key_getsecurity(struct key *key, char **_buffer)
 {
     *_buffer = NULL;
     return call_int_hook(key_getsecurity, 0, key, _buffer);
 }
 
 #endif  /* CONFIG_KEYS */
 
 #ifdef CONFIG_AUDIT
 
 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
 {
     return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
 }
 
 int security_audit_rule_known(struct audit_krule *krule)
 {
     return call_int_hook(audit_rule_known, 0, krule);
 }
 
 void security_audit_rule_free(void *lsmrule)
 {
     call_void_hook(audit_rule_free, lsmrule);
 }
 
 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule)
 {
     return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule);
 }
 #endif /* CONFIG_AUDIT */
 
 #ifdef CONFIG_BPF_SYSCALL
 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
 {
     return call_int_hook(bpf, 0, cmd, attr, size);
 }
 int security_bpf_map(struct bpf_map *map, fmode_t fmode)
 {
     return call_int_hook(bpf_map, 0, map, fmode);
 }
 int security_bpf_prog(struct bpf_prog *prog)
 {
     return call_int_hook(bpf_prog, 0, prog);
 }
 int security_bpf_map_alloc(struct bpf_map *map)
 {
     return call_int_hook(bpf_map_alloc_security, 0, map);
 }
 int security_bpf_prog_alloc(struct bpf_prog_aux *aux)
 {
     return call_int_hook(bpf_prog_alloc_security, 0, aux);
 }
 void security_bpf_map_free(struct bpf_map *map)
 {
     call_void_hook(bpf_map_free_security, map);
 }
 void security_bpf_prog_free(struct bpf_prog_aux *aux)
 {
     call_void_hook(bpf_prog_free_security, aux);
 }
 #endif /* CONFIG_BPF_SYSCALL */
 
 int security_locked_down(enum lockdown_reason what)
 {
     return call_int_hook(locked_down, 0, what);
 }
 EXPORT_SYMBOL(security_locked_down);
 
 #ifdef CONFIG_PERF_EVENTS
 int security_perf_event_open(struct perf_event_attr *attr, int type)
 {
     return call_int_hook(perf_event_open, 0, attr, type);
 }
 
 int security_perf_event_alloc(struct perf_event *event)
 {
     return call_int_hook(perf_event_alloc, 0, event);
 }
 
 void security_perf_event_free(struct perf_event *event)
 {
     call_void_hook(perf_event_free, event);
 }
 
 int security_perf_event_read(struct perf_event *event)
 {
     return call_int_hook(perf_event_read, 0, event);
 }
 
 int security_perf_event_write(struct perf_event *event)
 {
     return call_int_hook(perf_event_write, 0, event);
 }
 #endif /* CONFIG_PERF_EVENTS */
 
 #ifdef CONFIG_IO_URING
 int security_uring_override_creds(const struct cred *new)
 {
     return call_int_hook(uring_override_creds, 0, new);
 }
 
 int security_uring_sqpoll(void)
 {
     return call_int_hook(uring_sqpoll, 0);
 }
 int security_uring_cmd(struct io_uring_cmd *ioucmd)
 {
     return call_int_hook(uring_cmd, 0, ioucmd);
 }
 #endif /* CONFIG_IO_URING */