diff --git a/fs/fs_context.c b/fs/fs_context.c
index 24ce12f0db32..22248b8a88a8 100644
--- a/fs/fs_context.c
+++ b/fs/fs_context.c
@@ -282,6 +282,10 @@ static struct fs_context *alloc_fs_context(struct file_system_type *fs_type,
 		break;
 	}
 
+	ret = security_fs_context_init(fc, reference);
+	if (ret < 0)
+		goto err_fc;
+
 	/* TODO: Make all filesystems support this unconditionally */
 	init_fs_context = fc->fs_type->init_fs_context;
 	if (!init_fs_context)
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index 11ff2b2e060f..651bffb0067e 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -144,6 +144,7 @@ int nfs_get_root(struct super_block *s, struct fs_context *fc)
 	}
 	if (error)
 		goto error_splat_root;
+	fc->lsm_set = true;
 	if (server->caps & NFS_CAP_SECURITY_LABEL &&
 		!(kflags_out & SECURITY_LSM_NATIVE_LABELS))
 		server->caps &= ~NFS_CAP_SECURITY_LABEL;
diff --git a/fs/super.c b/fs/super.c
index 60f57c7bc0a6..a1c440336fd9 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1519,10 +1519,12 @@ int vfs_get_tree(struct fs_context *fc)
 	smp_wmb();
 	sb->s_flags |= SB_BORN;
 
-	error = security_sb_set_mnt_opts(sb, fc->security, 0, NULL);
-	if (unlikely(error)) {
-		fc_drop_locked(fc);
-		return error;
+	if (!(fc->lsm_set)) {
+		error = security_sb_set_mnt_opts(sb, fc->security, 0, NULL);
+		if (unlikely(error)) {
+			fc_drop_locked(fc);
+			return error;
+		}
 	}
 
 	/*
diff --git a/include/linux/fs_context.h b/include/linux/fs_context.h
index 13fa6f3df8e4..3876dd96bb20 100644
--- a/include/linux/fs_context.h
+++ b/include/linux/fs_context.h
@@ -110,6 +110,7 @@ struct fs_context {
 	bool			need_free:1;	/* Need to call ops->free() */
 	bool			global:1;	/* Goes into &init_user_ns */
 	bool			oldapi:1;	/* Coming from mount(2) */
+	bool			lsm_set:1;	/* security_sb_set/clone_mnt_opts() already done */
 };
 
 struct fs_context_operations {
diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h
index eafa1d2489fd..6d1c738e4a84 100644
--- a/include/linux/lsm_hook_defs.h
+++ b/include/linux/lsm_hook_defs.h
@@ -54,6 +54,7 @@ LSM_HOOK(int, 0, bprm_creds_from_file, struct linux_binprm *bprm, struct file *f
 LSM_HOOK(int, 0, bprm_check_security, struct linux_binprm *bprm)
 LSM_HOOK(void, LSM_RET_VOID, bprm_committing_creds, struct linux_binprm *bprm)
 LSM_HOOK(void, LSM_RET_VOID, bprm_committed_creds, struct linux_binprm *bprm)
+LSM_HOOK(int, 0, fs_context_init, struct fs_context *fc, struct dentry *reference)
 LSM_HOOK(int, 0, fs_context_dup, struct fs_context *fc,
 	 struct fs_context *src_sc)
 LSM_HOOK(int, -ENOPARAM, fs_context_parse_param, struct fs_context *fc,
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index 91c8146649f5..1782814c7c5b 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -87,8 +87,12 @@
  * Security hooks for mount using fs_context.
  *	[See also Documentation/filesystems/mount_api.rst]
  *
+ * @fs_context_init:
+ *	Initialise fc->security.  This is initialised to NULL by the caller.
+ *	@fc indicates the new filesystem context.
+ *	@dentry indicates a reference for submount/remount
  * @fs_context_dup:
- *	Allocate and attach a security structure to sc->security.  This pointer
+ *	Allocate and attach a security structure to fc->security.  This pointer
  *	is initialised to NULL by the caller.
  *	@fc indicates the new filesystem context.
  *	@src_fc indicates the original filesystem context.
diff --git a/include/linux/security.h b/include/linux/security.h
index 7fc4e9f49f54..94834f699b04 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -291,6 +291,7 @@ int security_bprm_creds_from_file(struct linux_binprm *bprm, struct file *file);
 int security_bprm_check(struct linux_binprm *bprm);
 void security_bprm_committing_creds(struct linux_binprm *bprm);
 void security_bprm_committed_creds(struct linux_binprm *bprm);
+int security_fs_context_init(struct fs_context *fc, struct dentry *reference);
 int security_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc);
 int security_fs_context_parse_param(struct fs_context *fc, struct fs_parameter *param);
 int security_sb_alloc(struct super_block *sb);
@@ -620,6 +621,11 @@ static inline void security_bprm_committed_creds(struct linux_binprm *bprm)
 {
 }
 
+static inline int security_fs_context_init(struct fs_context *fc,
+					   struct dentry *reference)
+{
+	return 0;
+}
 static inline int security_fs_context_dup(struct fs_context *fc,
 					  struct fs_context *src_fc)
 {
diff --git a/security/security.c b/security/security.c
index 188b8f782220..e683027f9424 100644
--- a/security/security.c
+++ b/security/security.c
@@ -880,6 +880,11 @@ void security_bprm_committed_creds(struct linux_binprm *bprm)
 	call_void_hook(bprm_committed_creds, bprm);
 }
 
+int security_fs_context_init(struct fs_context *fc, struct dentry *reference)
+{
+	return call_int_hook(fs_context_init, 0, fc, reference);
+}
+
 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);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 1bbd53321d13..ddeaff4f3bb1 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2768,6 +2768,34 @@ static int selinux_umount(struct vfsmount *mnt, int flags)
 				   FILESYSTEM__UNMOUNT, NULL);
 }
 
+static int selinux_fs_context_init(struct fs_context *fc,
+				   struct dentry *reference)
+{
+	const struct superblock_security_struct *sbsec;
+	const struct inode_security_struct *root_isec;
+	struct selinux_mnt_opts *opts;
+
+	if (fc->purpose == FS_CONTEXT_FOR_SUBMOUNT) {
+		opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+		if (!opts)
+			return -ENOMEM;
+
+		root_isec = backing_inode_security(reference->d_sb->s_root);
+		sbsec = selinux_superblock(reference->d_sb);
+		if (sbsec->flags & FSCONTEXT_MNT)
+			opts->fscontext_sid	= sbsec->sid;
+		if (sbsec->flags & CONTEXT_MNT)
+			opts->context_sid	= sbsec->mntpoint_sid;
+		if (sbsec->flags & ROOTCONTEXT_MNT)
+			opts->rootcontext_sid	= root_isec->sid;
+		if (sbsec->flags & DEFCONTEXT_MNT)
+			opts->defcontext_sid	= sbsec->def_sid;
+		fc->security = opts;
+	}
+
+	return 0;
+}
+
 static int selinux_fs_context_dup(struct fs_context *fc,
 				  struct fs_context *src_fc)
 {
@@ -7239,6 +7267,7 @@ static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = {
 	/*
 	 * PUT "CLONING" (ACCESSING + ALLOCATING) HOOKS HERE
 	 */
+	LSM_HOOK_INIT(fs_context_init, selinux_fs_context_init),
 	LSM_HOOK_INIT(fs_context_dup, selinux_fs_context_dup),
 	LSM_HOOK_INIT(fs_context_parse_param, selinux_fs_context_parse_param),
 	LSM_HOOK_INIT(sb_eat_lsm_opts, selinux_sb_eat_lsm_opts),
