init/main.c: Initialize early LSMs after arch code, static keys and calls.

With LSMs using static calls and static keys, early_lsm_init needs to
wait for setup_arch for architecture specific functionality which
includes jump tables and static calls to be initialized.

Since not all architectures call jump_table_init in setup_arch,
explicitly call both jump_table_init and static_call_init before
early_security_init.

This only affects "early LSMs" i.e. only lockdown when
CONFIG_SECURITY_LOCKDOWN_LSM_EARLY is set.

Tested-by: Guenter Roeck <[email protected]>
Signed-off-by: KP Singh <[email protected]>
Signed-off-by: Paul Moore <[email protected]>

Author: sinkap

init/main.c

@@ -922,8 +922,11 @@ void start_kernel(void)
 	boot_cpu_init();
 	page_address_init();
 	pr_notice("%s", linux_banner);
-	early_security_init();
 	setup_arch(&command_line);
+	/* Static keys and static calls are needed by LSMs */
+	jump_label_init();
+	static_call_init();
+	early_security_init();
 	setup_boot_config();
 	setup_command_line(command_line);
 	setup_nr_cpu_ids();
@@ -934,7 +937,6 @@ void start_kernel(void)
 
 	pr_notice("Kernel command line: %s\n", saved_command_line);
 	/* parameters may set static keys */
-	jump_label_init();
 	parse_early_param();
 	after_dashes = parse_args("Booting kernel",
 				  static_command_line, __start___param,