Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 577 insertions, 0 deletions

diff --git a/security/lsm_init.c b/security/lsm_init.c
new file mode 100644
index 000000000..a1ad64181
--- /dev/null
+++ b/security/lsm_init.c
@@ -0,0 +1,577 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * LSM initialization functions
+ */
+
+#define pr_fmt(fmt) "LSM: " fmt
+
+#include <linux/init.h>
+#include <linux/lsm_hooks.h>
+
+#include "lsm.h"
+
+/* LSM enabled constants. */
+static __initdata int lsm_enabled_true = 1;
+static __initdata int lsm_enabled_false = 0;
+
+/* Pointers to LSM sections defined in include/asm-generic/vmlinux.lds.h */
+extern struct lsm_info __start_lsm_info[], __end_lsm_info[];
+extern struct lsm_info __start_early_lsm_info[], __end_early_lsm_info[];
+
+/* Number of "early" LSMs */
+static __initdata unsigned int lsm_count_early;
+
+/* Build and boot-time LSM ordering. */
+static __initconst const char *const lsm_order_builtin = CONFIG_LSM;
+static __initdata const char *lsm_order_cmdline;
+static __initdata const char *lsm_order_legacy;
+
+/* Ordered list of LSMs to initialize. */
+static __initdata struct lsm_info *lsm_order[MAX_LSM_COUNT + 1];
+static __initdata struct lsm_info *lsm_exclusive;
+
+#define lsm_order_for_each(iter)					\
+	for ((iter) = lsm_order; *(iter); (iter)++)
+#define lsm_for_each_raw(iter)						\
+	for ((iter) = __start_lsm_info;					\
+	     (iter) < __end_lsm_info; (iter)++)
+#define lsm_early_for_each_raw(iter)					\
+	for ((iter) = __start_early_lsm_info;				\
+	     (iter) < __end_early_lsm_info; (iter)++)
+
+#define lsm_initcall(level)						\
+	({								\
+		int _r, _rc = 0;					\
+		struct lsm_info **_lp, *_l;				\
+		lsm_order_for_each(_lp) {				\
+			_l = *_lp;					\
+			if (!_l->initcall_##level)			\
+				continue;				\
+			lsm_pr_dbg("running %s %s initcall",		\
+				   _l->id->name, #level);		\
+			_r = _l->initcall_##level();			\
+			if (_r) {					\
+				pr_warn("failed LSM %s %s initcall with errno %d\n", \
+					_l->id->name, #level, _r);	\
+				if (!_rc)				\
+					_rc = _r;			\
+			}						\
+		}							\
+		_rc;							\
+	})
+
+/**
+ * lsm_choose_security - Legacy "major" LSM selection
+ * @str: kernel command line parameter
+ */
+static int __init lsm_choose_security(char *str)
+{
+	lsm_order_legacy = str;
+	return 1;
+}
+__setup("security=", lsm_choose_security);
+
+/**
+ * lsm_choose_lsm - Modern LSM selection
+ * @str: kernel command line parameter
+ */
+static int __init lsm_choose_lsm(char *str)
+{
+	lsm_order_cmdline = str;
+	return 1;
+}
+__setup("lsm=", lsm_choose_lsm);
+
+/**
+ * lsm_debug_enable - Enable LSM framework debugging
+ * @str: kernel command line parameter
+ *
+ * Currently we only provide debug info during LSM initialization, but we may
+ * want to expand this in the future.
+ */
+static int __init lsm_debug_enable(char *str)
+{
+	lsm_debug = true;
+	return 1;
+}
+__setup("lsm.debug", lsm_debug_enable);
+
+/**
+ * lsm_enabled_set - Mark a LSM as enabled
+ * @lsm: LSM definition
+ * @enabled: enabled flag
+ */
+static void __init lsm_enabled_set(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 ||
+	    lsm->enabled == &lsm_enabled_true ||
+	    lsm->enabled == &lsm_enabled_false) {
+		lsm->enabled = enabled ? &lsm_enabled_true : &lsm_enabled_false;
+	} else {
+		*lsm->enabled = enabled;
+	}
+}
+
+/**
+ * lsm_is_enabled - Determine if a LSM is enabled
+ * @lsm: LSM definition
+ */
+static inline bool lsm_is_enabled(struct lsm_info *lsm)
+{
+	return (lsm->enabled ? *lsm->enabled : false);
+}
+
+/**
+ * lsm_order_exists - Determine if a LSM exists in the ordered list
+ * @lsm: LSM definition
+ */
+static bool __init lsm_order_exists(struct lsm_info *lsm)
+{
+	struct lsm_info **check;
+
+	lsm_order_for_each(check) {
+		if (*check == lsm)
+			return true;
+	}
+
+	return false;
+}
+
+/**
+ * lsm_order_append - Append a LSM to the ordered list
+ * @lsm: LSM definition
+ * @src: source of the addition
+ *
+ * Append @lsm to the enabled LSM array after ensuring that it hasn't been
+ * explicitly disabled, is a duplicate entry, or would run afoul of the
+ * LSM_FLAG_EXCLUSIVE logic.
+ */
+static void __init lsm_order_append(struct lsm_info *lsm, const char *src)
+{
+	/* Ignore duplicate selections. */
+	if (lsm_order_exists(lsm))
+		return;
+
+	/* Skip explicitly disabled LSMs. */
+	if (lsm->enabled && !lsm_is_enabled(lsm)) {
+		lsm_pr_dbg("skip previously disabled LSM %s:%s\n",
+			   src, lsm->id->name);
+		return;
+	}
+
+	if (lsm_active_cnt == MAX_LSM_COUNT) {
+		pr_warn("exceeded maximum LSM count on %s:%s\n",
+			src, lsm->id->name);
+		lsm_enabled_set(lsm, false);
+		return;
+	}
+
+	if (lsm->flags & LSM_FLAG_EXCLUSIVE) {
+		if (lsm_exclusive) {
+			lsm_pr_dbg("skip exclusive LSM conflict %s:%s\n",
+				   src, lsm->id->name);
+			lsm_enabled_set(lsm, false);
+			return;
+		} else {
+			lsm_pr_dbg("select exclusive LSM %s:%s\n",
+				   src, lsm->id->name);
+			lsm_exclusive = lsm;
+		}
+	}
+
+	lsm_enabled_set(lsm, true);
+	lsm_order[lsm_active_cnt] = lsm;
+	lsm_idlist[lsm_active_cnt++] = lsm->id;
+
+	lsm_pr_dbg("enabling LSM %s:%s\n", src, lsm->id->name);
+}
+
+/**
+ * lsm_order_parse - Parse the comma delimited LSM list
+ * @list: LSM list
+ * @src: source of the list
+ */
+static void __init lsm_order_parse(const char *list, const char *src)
+{
+	struct lsm_info *lsm;
+	char *sep, *name, *next;
+
+	/* Handle any Legacy LSM exclusions if one was specified. */
+	if (lsm_order_legacy) {
+		/*
+		 * 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.
+		 */
+		lsm_for_each_raw(lsm) {
+			if ((lsm->flags & LSM_FLAG_LEGACY_MAJOR) &&
+			     strcmp(lsm->id->name, lsm_order_legacy)) {
+				lsm_enabled_set(lsm, false);
+				lsm_pr_dbg("skip legacy LSM conflict %s:%s\n",
+					   src, lsm->id->name);
+			}
+		}
+	}
+
+	/* LSM_ORDER_FIRST */
+	lsm_for_each_raw(lsm) {
+		if (lsm->order == LSM_ORDER_FIRST)
+			lsm_order_append(lsm, "first");
+	}
+
+	/* Normal or "mutable" LSMs */
+	sep = kstrdup(list, GFP_KERNEL);
+	next = sep;
+	/* Walk the list, looking for matching LSMs. */
+	while ((name = strsep(&next, ",")) != NULL) {
+		lsm_for_each_raw(lsm) {
+			if (!strcmp(lsm->id->name, name) &&
+			    lsm->order == LSM_ORDER_MUTABLE)
+				lsm_order_append(lsm, src);
+		}
+	}
+	kfree(sep);
+
+	/* Legacy LSM if specified. */
+	if (lsm_order_legacy) {
+		lsm_for_each_raw(lsm) {
+			if (!strcmp(lsm->id->name, lsm_order_legacy))
+				lsm_order_append(lsm, src);
+		}
+	}
+
+	/* LSM_ORDER_LAST */
+	lsm_for_each_raw(lsm) {
+		if (lsm->order == LSM_ORDER_LAST)
+			lsm_order_append(lsm, "last");
+	}
+
+	/* Disable all LSMs not previously enabled. */
+	lsm_for_each_raw(lsm) {
+		if (lsm_order_exists(lsm))
+			continue;
+		lsm_enabled_set(lsm, false);
+		lsm_pr_dbg("skip disabled LSM %s:%s\n", src, lsm->id->name);
+	}
+}
+
+/**
+ * lsm_blob_size_update - Update the LSM blob size and offset information
+ * @sz_req: the requested additional blob size
+ * @sz_cur: the existing blob size
+ */
+static void __init lsm_blob_size_update(unsigned int *sz_req,
+					unsigned int *sz_cur)
+{
+	unsigned int offset;
+
+	if (*sz_req == 0)
+		return;
+
+	offset = ALIGN(*sz_cur, sizeof(void *));
+	*sz_cur = offset + *sz_req;
+	*sz_req = offset;
+}
+
+/**
+ * lsm_prepare - Prepare the LSM framework for a new LSM
+ * @lsm: LSM definition
+ */
+static void __init lsm_prepare(struct lsm_info *lsm)
+{
+	struct lsm_blob_sizes *blobs = lsm->blobs;
+
+	if (!blobs)
+		return;
+
+	/* Register the LSM blob sizes. */
+	blobs = lsm->blobs;
+	lsm_blob_size_update(&blobs->lbs_cred, &blob_sizes.lbs_cred);
+	lsm_blob_size_update(&blobs->lbs_file, &blob_sizes.lbs_file);
+	lsm_blob_size_update(&blobs->lbs_backing_file,
+			     &blob_sizes.lbs_backing_file);
+	lsm_blob_size_update(&blobs->lbs_ib, &blob_sizes.lbs_ib);
+	/* inode blob gets an rcu_head in addition to LSM blobs. */
+	if (blobs->lbs_inode && blob_sizes.lbs_inode == 0)
+		blob_sizes.lbs_inode = sizeof(struct rcu_head);
+	lsm_blob_size_update(&blobs->lbs_inode, &blob_sizes.lbs_inode);
+	lsm_blob_size_update(&blobs->lbs_ipc, &blob_sizes.lbs_ipc);
+	lsm_blob_size_update(&blobs->lbs_key, &blob_sizes.lbs_key);
+	lsm_blob_size_update(&blobs->lbs_msg_msg, &blob_sizes.lbs_msg_msg);
+	lsm_blob_size_update(&blobs->lbs_perf_event,
+			     &blob_sizes.lbs_perf_event);
+	lsm_blob_size_update(&blobs->lbs_sock, &blob_sizes.lbs_sock);
+	lsm_blob_size_update(&blobs->lbs_superblock,
+			     &blob_sizes.lbs_superblock);
+	lsm_blob_size_update(&blobs->lbs_task, &blob_sizes.lbs_task);
+	lsm_blob_size_update(&blobs->lbs_tun_dev, &blob_sizes.lbs_tun_dev);
+	lsm_blob_size_update(&blobs->lbs_xattr_count,
+			     &blob_sizes.lbs_xattr_count);
+	lsm_blob_size_update(&blobs->lbs_bdev, &blob_sizes.lbs_bdev);
+	lsm_blob_size_update(&blobs->lbs_bpf_map, &blob_sizes.lbs_bpf_map);
+	lsm_blob_size_update(&blobs->lbs_bpf_prog, &blob_sizes.lbs_bpf_prog);
+	lsm_blob_size_update(&blobs->lbs_bpf_token, &blob_sizes.lbs_bpf_token);
+}
+
+/**
+ * lsm_init_single - Initialize a given LSM
+ * @lsm: LSM definition
+ */
+static void __init lsm_init_single(struct lsm_info *lsm)
+{
+	int ret;
+
+	if (!lsm_is_enabled(lsm))
+		return;
+
+	lsm_pr_dbg("initializing %s\n", lsm->id->name);
+	ret = lsm->init();
+	WARN(ret, "%s failed to initialize: %d\n", lsm->id->name, ret);
+}
+
+/**
+ * lsm_static_call_init - Initialize a LSM's static calls
+ * @hl: LSM hook list
+ */
+static int __init lsm_static_call_init(struct security_hook_list *hl)
+{
+	struct lsm_static_call *scall = hl->scalls;
+	int i;
+
+	for (i = 0; i < MAX_LSM_COUNT; i++) {
+		/* Update the first static call that is not used yet */
+		if (!scall->hl) {
+			__static_call_update(scall->key, scall->trampoline,
+					     hl->hook.lsm_func_addr);
+			scall->hl = hl;
+			static_branch_enable(scall->active);
+			return 0;
+		}
+		scall++;
+	}
+
+	return -ENOSPC;
+}
+
+/**
+ * security_add_hooks - Add a LSM's hooks to the LSM framework's hook lists
+ * @hooks: LSM hooks to add
+ * @count: number of hooks to add
+ * @lsmid: identification information for the LSM
+ *
+ * Each LSM has to register its hooks with the LSM framework.
+ */
+void __init security_add_hooks(struct security_hook_list *hooks, int count,
+			       const struct lsm_id *lsmid)
+{
+	int i;
+
+	for (i = 0; i < count; i++) {
+		hooks[i].lsmid = lsmid;
+		if (lsm_static_call_init(&hooks[i]))
+			panic("exhausted LSM callback slots with LSM %s\n",
+			      lsmid->name);
+	}
+}
+
+/**
+ * early_security_init - Initialize the early LSMs
+ */
+int __init early_security_init(void)
+{
+	struct lsm_info *lsm;
+
+	/* NOTE: lsm_pr_dbg() doesn't work here as lsm_debug is not yet set */
+
+	lsm_early_for_each_raw(lsm) {
+		lsm_enabled_set(lsm, true);
+		lsm_order_append(lsm, "early");
+		lsm_prepare(lsm);
+		lsm_init_single(lsm);
+		lsm_count_early++;
+	}
+
+	return 0;
+}
+
+/**
+ * security_init - Initializes the LSM framework
+ *
+ * This should be called early in the kernel initialization sequence.
+ */
+int __init security_init(void)
+{
+	unsigned int cnt;
+	struct lsm_info **lsm;
+
+	if (lsm_debug) {
+		struct lsm_info *i;
+
+		cnt = 0;
+		lsm_pr("available LSMs: ");
+		lsm_early_for_each_raw(i)
+			lsm_pr_cont("%s%s(E)", (cnt++ ? "," : ""), i->id->name);
+		lsm_for_each_raw(i)
+			lsm_pr_cont("%s%s", (cnt++ ? "," : ""), i->id->name);
+		lsm_pr_cont("\n");
+
+		lsm_pr("built-in LSM config: %s\n", lsm_order_builtin);
+
+		lsm_pr("legacy LSM parameter: %s\n", lsm_order_legacy);
+		lsm_pr("boot LSM parameter: %s\n", lsm_order_cmdline);
+
+		/* see the note about lsm_pr_dbg() in early_security_init() */
+		lsm_early_for_each_raw(i)
+			lsm_pr("enabled LSM early:%s\n", i->id->name);
+	}
+
+	if (lsm_order_cmdline) {
+		if (lsm_order_legacy)
+			lsm_order_legacy = NULL;
+		lsm_order_parse(lsm_order_cmdline, "cmdline");
+	} else
+		lsm_order_parse(lsm_order_builtin, "builtin");
+
+	lsm_order_for_each(lsm)
+		lsm_prepare(*lsm);
+
+	if (lsm_debug) {
+		lsm_pr("blob(cred) size %d\n", blob_sizes.lbs_cred);
+		lsm_pr("blob(file) size %d\n", blob_sizes.lbs_file);
+		lsm_pr("blob(backing_file) size %d\n",
+		       blob_sizes.lbs_backing_file);
+		lsm_pr("blob(ib) size %d\n", blob_sizes.lbs_ib);
+		lsm_pr("blob(inode) size %d\n", blob_sizes.lbs_inode);
+		lsm_pr("blob(ipc) size %d\n", blob_sizes.lbs_ipc);
+		lsm_pr("blob(key) size %d\n", blob_sizes.lbs_key);
+		lsm_pr("blob(msg_msg)_size %d\n", blob_sizes.lbs_msg_msg);
+		lsm_pr("blob(sock) size %d\n", blob_sizes.lbs_sock);
+		lsm_pr("blob(superblock) size %d\n", blob_sizes.lbs_superblock);
+		lsm_pr("blob(perf_event) size %d\n", blob_sizes.lbs_perf_event);
+		lsm_pr("blob(task) size %d\n", blob_sizes.lbs_task);
+		lsm_pr("blob(tun_dev) size %d\n", blob_sizes.lbs_tun_dev);
+		lsm_pr("blob(xattr) count %d\n", blob_sizes.lbs_xattr_count);
+		lsm_pr("blob(bdev) size %d\n", blob_sizes.lbs_bdev);
+		lsm_pr("blob(bpf_map) size %d\n", blob_sizes.lbs_bpf_map);
+		lsm_pr("blob(bpf_prog) size %d\n", blob_sizes.lbs_bpf_prog);
+		lsm_pr("blob(bpf_token) size %d\n", blob_sizes.lbs_bpf_token);
+	}
+
+	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_backing_file)
+		lsm_backing_file_cache = kmem_cache_create(
+						   "lsm_backing_file_cache",
+						   blob_sizes.lbs_backing_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);
+
+	if (lsm_cred_alloc((struct cred *)unrcu_pointer(current->cred),
+			   GFP_KERNEL))
+		panic("early LSM cred alloc failed\n");
+	if (lsm_task_alloc(current))
+		panic("early LSM task alloc failed\n");
+
+	cnt = 0;
+	lsm_order_for_each(lsm) {
+		/* skip the "early" LSMs as they have already been setup */
+		if (cnt++ < lsm_count_early)
+			continue;
+		lsm_init_single(*lsm);
+	}
+
+	return 0;
+}
+
+/**
+ * security_initcall_pure - Run the LSM pure initcalls
+ */
+static int __init security_initcall_pure(void)
+{
+	return lsm_initcall(pure);
+}
+pure_initcall(security_initcall_pure);
+
+/**
+ * security_initcall_early - Run the LSM early initcalls
+ */
+static int __init security_initcall_early(void)
+{
+	return lsm_initcall(early);
+}
+early_initcall(security_initcall_early);
+
+/**
+ * security_initcall_core - Run the LSM core initcalls
+ */
+static int __init security_initcall_core(void)
+{
+	int rc_sfs, rc_lsm;
+
+	rc_sfs = securityfs_init();
+	rc_lsm = lsm_initcall(core);
+
+	return (rc_sfs ? rc_sfs : rc_lsm);
+}
+core_initcall(security_initcall_core);
+
+/**
+ * security_initcall_subsys - Run the LSM subsys initcalls
+ */
+static int __init security_initcall_subsys(void)
+{
+	return lsm_initcall(subsys);
+}
+subsys_initcall(security_initcall_subsys);
+
+/**
+ * security_initcall_fs - Run the LSM fs initcalls
+ */
+static int __init security_initcall_fs(void)
+{
+	return lsm_initcall(fs);
+}
+fs_initcall(security_initcall_fs);
+
+/**
+ * security_initcall_device - Run the LSM device initcalls
+ */
+static int __init security_initcall_device(void)
+{
+	return lsm_initcall(device);
+}
+device_initcall(security_initcall_device);
+
+/**
+ * security_initcall_late - Run the LSM late initcalls
+ */
+static int __init security_initcall_late(void)
+{
+	return lsm_initcall(late);
+}
+late_initcall(security_initcall_late);
+
+/**
+ * security_initcall_late_sync - Run the LSM late initcalls sync
+ */
+static int __init security_initcall_late_sync(void)
+{
+	int rc;
+
+	rc = lsm_initcall(late_sync);
+	lsm_pr_dbg("all enabled LSMs fully activated\n");
+	call_blocking_lsm_notifier(LSM_STARTED_ALL, NULL);
+
+	return rc;
+}
+late_initcall_sync(security_initcall_late_sync);