x86/elf: Make loading of 32bit processes depend on ia32_enabled()

jira VULN-764
cve-pre CVE-2024-25743
cve-pre CVE-2024-25744
commit-author Nikolay Borisov <nik.borisov@suse.com>
commit 5ae2702

Major aspect of ia32 emulation is the ability to load 32bit processes.
That's currently decided (among others) by compat_elf_check_arch().

Make the macro use ia32_enabled() to decide if IA32 compat is
enabled before loading a 32bit process.

	Signed-off-by: Nikolay Borisov <nik.borisov@suse.com>
	Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20230623111409.3047467-5-nik.borisov@suse.com

(cherry picked from commit 5ae2702)
	Signed-off-by: Marcin Wcisło <marcin.wcislo@conclusive.pl>

Author: pvts-mat

arch/x86/include/asm/elf.h

@@ -7,6 +7,7 @@
  */
 #include <linux/thread_info.h>
 
+#include <asm/ia32.h>
 #include <asm/ptrace.h>
 #include <asm/user.h>
 #include <asm/auxvec.h>
@@ -160,7 +161,7 @@ do {						\
 	((x)->e_machine == EM_X86_64)
 
 #define compat_elf_check_arch(x)					\
-	(elf_check_arch_ia32(x) ||					\
+	((elf_check_arch_ia32(x) && ia32_enabled()) ||			\
 	 (IS_ENABLED(CONFIG_X86_X32_ABI) && (x)->e_machine == EM_X86_64))
 
 #if __USER32_DS != __USER_DS