Merge tag 'objtool-urgent-2026-02-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull objtool fixes from Ingo Molnar::

 - Bump up the Clang minimum version requirements for livepatch
   builds, due to Clang assembler section handling bugs causing
   silent miscompilations

 - Strip livepatching symbol artifacts from non-livepatch modules

 - Fix livepatch build warnings when certain Clang LTO options
   are enabled

 - Fix livepatch build error when CONFIG_MEM_ALLOC_PROFILING_DEBUG=y

* tag 'objtool-urgent-2026-02-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  objtool/klp: Fix unexported static call key access for manually built livepatch modules
  objtool/klp: Fix symbol correlation for orphaned local symbols
  livepatch: Free klp_{object,func}_ext data after initialization
  livepatch: Fix having __klp_objects relics in non-livepatch modules
  livepatch/klp-build: Require Clang assembler >= 20

3 files changed, 15 insertions, 18 deletions

diff --git a/scripts/livepatch/init.c b/scripts/livepatch/init.c
index 2274d8f5a482..638c95cffe76 100644
--- a/scripts/livepatch/init.c
+++ b/scripts/livepatch/init.c
@@ -9,19 +9,19 @@
 #include <linux/slab.h>
 #include <linux/livepatch.h>
 
-extern struct klp_object_ext __start_klp_objects[];
-extern struct klp_object_ext __stop_klp_objects[];
-
 static struct klp_patch *patch;
 
 static int __init livepatch_mod_init(void)
 {
+	struct klp_object_ext *obj_exts;
+	size_t obj_exts_sec_size;
 	struct klp_object *objs;
 	unsigned int nr_objs;
 	int ret;
 
-	nr_objs = __stop_klp_objects - __start_klp_objects;
-
+	obj_exts = klp_find_section_by_name(THIS_MODULE, ".init.klp_objects",
+					    &obj_exts_sec_size);
+	nr_objs = obj_exts_sec_size / sizeof(*obj_exts);
 	if (!nr_objs) {
 		pr_err("nothing to patch!\n");
 		ret = -EINVAL;
@@ -41,7 +41,7 @@ static int __init livepatch_mod_init(void)
 	}
 
 	for (int i = 0; i < nr_objs; i++) {
-		struct klp_object_ext *obj_ext = __start_klp_objects + i;
+		struct klp_object_ext *obj_ext = obj_exts + i;
 		struct klp_func_ext *funcs_ext = obj_ext->funcs;
 		unsigned int nr_funcs = obj_ext->nr_funcs;
 		struct klp_func *funcs = objs[i].funcs;
@@ -90,12 +90,10 @@ err:
 
 static void __exit livepatch_mod_exit(void)
 {
-	unsigned int nr_objs;
-
-	nr_objs = __stop_klp_objects - __start_klp_objects;
+	struct klp_object *obj;
 
-	for (int i = 0; i < nr_objs; i++)
-		kfree(patch->objs[i].funcs);
+	klp_for_each_object_static(patch, obj)
+		kfree(obj->funcs);
 
 	kfree(patch->objs);
 	kfree(patch);
diff --git a/scripts/livepatch/klp-build b/scripts/livepatch/klp-build
index a73515a82272..809e198a561d 100755
--- a/scripts/livepatch/klp-build
+++ b/scripts/livepatch/klp-build
@@ -249,6 +249,10 @@ validate_config() {
 	[[ -v CONFIG_GCC_PLUGIN_RANDSTRUCT ]] &&	\
 		die "kernel option 'CONFIG_GCC_PLUGIN_RANDSTRUCT' not supported"
 
+	[[ -v CONFIG_AS_IS_LLVM ]] &&				\
+		[[ "$CONFIG_AS_VERSION" -lt 200000 ]] &&	\
+		die "Clang assembler version < 20 not supported"
+
 	return 0
 }
 
diff --git a/scripts/module.lds.S b/scripts/module.lds.S
index 3037d5e5527c..054ef99e8288 100644
--- a/scripts/module.lds.S
+++ b/scripts/module.lds.S
@@ -34,13 +34,8 @@ SECTIONS {
 
 	__patchable_function_entries : { *(__patchable_function_entries) }
 
-	__klp_funcs		0: ALIGN(8) { KEEP(*(__klp_funcs)) }
-
-	__klp_objects		0: ALIGN(8) {
-		__start_klp_objects = .;
-		KEEP(*(__klp_objects))
-		__stop_klp_objects = .;
-	}
+	.init.klp_funcs		0 : ALIGN(8) { KEEP(*(.init.klp_funcs)) }
+	.init.klp_objects	0 : ALIGN(8) { KEEP(*(.init.klp_objects)) }
 
 #ifdef CONFIG_ARCH_USES_CFI_TRAPS
 	__kcfi_traps		: { KEEP(*(.kcfi_traps)) }