Merge tag 'hardening-v6.10-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull hardening fixes from Kees Cook:

 - loadpin: Prevent SECURITY_LOADPIN_ENFORCE=y without module
   decompression (Stephen Boyd)

 - ubsan: Restore dependency on ARCH_HAS_UBSAN

 - kunit/fortify: Fix memcmp() test to be amplitude agnostic

* tag 'hardening-v6.10-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  kunit/fortify: Fix memcmp() test to be amplitude agnostic
  ubsan: Restore dependency on ARCH_HAS_UBSAN
  loadpin: Prevent SECURITY_LOADPIN_ENFORCE=y without module decompression

Author: torvalds

lib/Kconfig.ubsan

@@ -4,6 +4,7 @@ config ARCH_HAS_UBSAN
 
 menuconfig UBSAN
 	bool "Undefined behaviour sanity checker"
+	depends on ARCH_HAS_UBSAN
 	help
 	  This option enables the Undefined Behaviour sanity checker.
 	  Compile-time instrumentation is used to detect various undefined

lib/fortify_kunit.c

@@ -990,7 +990,7 @@ static void fortify_test_memcmp(struct kunit *test)
 	KUNIT_ASSERT_EQ(test, memcmp(one, two, one_len), 0);
 	KUNIT_EXPECT_EQ(test, fortify_read_overflows, 0);
 	/* Still in bounds, but no longer matching. */
-	KUNIT_ASSERT_EQ(test, memcmp(one, two, one_len + 1), -32);
+	KUNIT_ASSERT_LT(test, memcmp(one, two, one_len + 1), 0);
 	KUNIT_EXPECT_EQ(test, fortify_read_overflows, 0);
 
 	/* Catch too-large ranges. */

security/loadpin/Kconfig

@@ -14,6 +14,9 @@ config SECURITY_LOADPIN
 config SECURITY_LOADPIN_ENFORCE
 	bool "Enforce LoadPin at boot"
 	depends on SECURITY_LOADPIN
+	# Module compression breaks LoadPin unless modules are decompressed in
+	# the kernel.
+	depends on !MODULES || (MODULE_COMPRESS_NONE || MODULE_DECOMPRESS)
 	help
 	  If selected, LoadPin will enforce pinning at boot. If not
 	  selected, it can be enabled at boot with the kernel parameter