lookup: skip finding local symbols for object with no local symbols

Signed-off-by: hubin <hubin73@huawei.com>

0044-lookup-skip-finding-local-symbols-for-object-with-no.patch

@@ -0,0 +1,51 @@
+From 6b79df49055abbccd3033fbec52085b8a9d7b250 Mon Sep 17 00:00:00 2001
+From: hubin <hubin73@huawei.com>
+Date: Sun, 9 Oct 2022 10:34:52 +0800
+Subject: [PATCH] lookup: skip finding local symbols for object with no local
+ symbols
+
+Signed-off-by: hubin <hubin73@huawei.com>
+---
+ kpatch-build/lookup.c | 19 +++++++++++++++++++
+ 1 file changed, 19 insertions(+)
+
+diff --git a/kpatch-build/lookup.c b/kpatch-build/lookup.c
+index b77d7a8..875605d 100644
+--- a/kpatch-build/lookup.c
++++ b/kpatch-build/lookup.c
+@@ -166,6 +166,22 @@ static bool locals_match(struct lookup_table *table, int idx,
+ 	return true;
+ }
+ 
++static int count_local_symbol(struct list_head *sym_list)
++{
++	struct symbol *sym;
++	int sym_num = 0;
++
++	list_for_each_entry(sym, sym_list, list) {
++		if (sym->bind != STB_LOCAL)
++			continue;
++		if (sym->type != STT_FUNC && sym->type != STT_OBJECT)
++			continue;
++		sym_num++;
++	}
++
++	return sym_num;
++}
++
+ static void find_local_syms(struct lookup_table *table, struct symbol *file_sym,
+ 		struct list_head *sym_list)
+ {
+@@ -173,6 +189,9 @@ static void find_local_syms(struct lookup_table *table, struct symbol *file_sym,
+ 	struct object_symbol *lookup_table_file_sym = NULL;
+ 	int i;
+ 
++	if (count_local_symbol(sym_list) == 0)
++		return;
++
+ 	for_each_obj_symbol(i, sym, table) {
+ 		if (sym->type != STT_FILE)
+ 			continue;
+-- 
+2.27.0
+

kpatch.spec

@@ -1,7 +1,7 @@
 Name:           kpatch
 Epoch:          1
 Version:        0.9.5
-Release:        13
+Release:        14
 Summary:        A Linux dynamic kernel patching infrastructure
 
 License:        GPLv2
@@ -56,6 +56,7 @@ Patch0040:0040-create-diff-object-allow-__jump_table-section.patch
 Patch0041:0041-livepatch-patch-hook-fix-kpatch-build-error-which-do.patch
 Patch0042:0042-kpatch-build-fix-loading-error-in-aarch64.patch
 Patch0043:0043-kpatch-build-Remove-duplicate-functions.patch
+Patch0044:0044-lookup-skip-finding-local-symbols-for-object-with-no.patch
 
 BuildRequires:  gcc elfutils-libelf-devel kernel-devel git
 Requires:       bc make gcc patch bison flex openssl-devel
@@ -116,6 +117,12 @@ popd
 %{_mandir}/man1/*.1.gz
 
 %changelog
+* Sun Oct 9 2022 Bin Hu <hubin73@huawei.com> -1:0.9.5-14
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC:lookup: skip finding local symbols for object with no local symbols
+
 * Tue Sep 6 2022 Tang Bin <tangbin_yewu@cmss.chinamobile.com> -1:0.9.5-13
 - Type:clean code
 - ID:NA