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, 42 insertions, 13 deletions

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 719ec727efd4..3fd98c5b6e1a 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -683,7 +683,7 @@ static int create_static_call_sections(struct objtool_file *file)
 
 		key_sym = find_symbol_by_name(file->elf, tmp);
 		if (!key_sym) {
-			if (!opts.module || file->klp) {
+			if (!opts.module) {
 				ERROR("static_call: can't find static_call_key symbol: %s", tmp);
 				return -1;
 			}
@@ -4762,7 +4762,7 @@ static int validate_ibt(struct objtool_file *file)
 		    !strcmp(sec->name, "__bug_table")			||
 		    !strcmp(sec->name, "__ex_table")			||
 		    !strcmp(sec->name, "__jump_table")			||
-		    !strcmp(sec->name, "__klp_funcs")			||
+		    !strcmp(sec->name, ".init.klp_funcs")		||
 		    !strcmp(sec->name, "__mcount_loc")			||
 		    !strcmp(sec->name, ".llvm.call-graph-profile")	||
 		    !strcmp(sec->name, ".llvm_bb_addr_map")		||
diff --git a/tools/objtool/include/objtool/klp.h b/tools/objtool/include/objtool/klp.h
index ad830a7ce55b..e32e5e8bc631 100644
--- a/tools/objtool/include/objtool/klp.h
+++ b/tools/objtool/include/objtool/klp.h
@@ -6,12 +6,12 @@
 #define SHN_LIVEPATCH		0xff20
 
 /*
- * __klp_objects and __klp_funcs are created by klp diff and used by the patch
- * module init code to build the klp_patch, klp_object and klp_func structs
- * needed by the livepatch API.
+ * .init.klp_objects and .init.klp_funcs are created by klp diff and used by the
+ * patch module init code to build the klp_patch, klp_object and klp_func
+ * structs needed by the livepatch API.
  */
-#define KLP_OBJECTS_SEC	"__klp_objects"
-#define KLP_FUNCS_SEC	"__klp_funcs"
+#define KLP_OBJECTS_SEC	".init.klp_objects"
+#define KLP_FUNCS_SEC	".init.klp_funcs"
 
 /*
  * __klp_relocs is an intermediate section which are created by klp diff and
diff --git a/tools/objtool/klp-diff.c b/tools/objtool/klp-diff.c
index d94531e3f64e..9f1f4011eb9c 100644
--- a/tools/objtool/klp-diff.c
+++ b/tools/objtool/klp-diff.c
@@ -364,11 +364,40 @@ static int correlate_symbols(struct elfs *e)
 	struct symbol *file1_sym, *file2_sym;
 	struct symbol *sym1, *sym2;
 
-	/* Correlate locals */
-	for (file1_sym = first_file_symbol(e->orig),
-	     file2_sym = first_file_symbol(e->patched); ;
-	     file1_sym = next_file_symbol(e->orig, file1_sym),
-	     file2_sym = next_file_symbol(e->patched, file2_sym)) {
+	file1_sym = first_file_symbol(e->orig);
+	file2_sym = first_file_symbol(e->patched);
+
+	/*
+	 * Correlate any locals before the first FILE symbol.  This has been
+	 * seen when LTO inexplicably strips the initramfs_data.o FILE symbol
+	 * due to the file only containing data and no code.
+	 */
+	for_each_sym(e->orig, sym1) {
+		if (sym1 == file1_sym || !is_local_sym(sym1))
+			break;
+
+		if (dont_correlate(sym1))
+			continue;
+
+		for_each_sym(e->patched, sym2) {
+			if (sym2 == file2_sym || !is_local_sym(sym2))
+				break;
+
+			if (sym2->twin || dont_correlate(sym2))
+				continue;
+
+			if (strcmp(sym1->demangled_name, sym2->demangled_name))
+				continue;
+
+			sym1->twin = sym2;
+			sym2->twin = sym1;
+			break;
+		}
+	}
+
+	/* Correlate locals after the first FILE symbol */
+	for (; ; file1_sym = next_file_symbol(e->orig, file1_sym),
+		 file2_sym = next_file_symbol(e->patched, file2_sym)) {
 
 		if (!file1_sym && file2_sym) {
 			ERROR("FILE symbol mismatch: NULL != %s", file2_sym->name);
@@ -1436,7 +1465,7 @@ static int clone_special_sections(struct elfs *e)
 }
 
 /*
- * Create __klp_objects and __klp_funcs sections which are intermediate
+ * Create .init.klp_objects and .init.klp_funcs sections which are intermediate
  * sections provided as input to the patch module's init code for building the
  * klp_patch, klp_object and klp_func structs for the livepatch API.
  */