diff --git a/kmod.spec b/kmod.spec
index 3b2aabac004be177d5753a1e9ec69761bd8987e9..978587fd93c8dfe0c0fd95587983bdc261ac75aa 100644
--- a/kmod.spec
+++ b/kmod.spec
@@ -1,6 +1,6 @@
 Name:           kmod
 Version:        27
-Release:        6
+Release:        7
 Summary:        Kernel module management
 # GPLv2+ is used by programs, LGPLv2+ is used for libraries.
 License:        GPLv2+ and LGPLv2+
@@ -116,6 +116,10 @@ install -m 0644 %{SOURCE2} $RPM_BUILD_ROOT%{_sysconfdir}/depmod.d/dist.conf
 %doc TODO NEWS README
 
 %changelog
+* Wed Nov 24 2021 Yang Yanchao <yangyanchao6@huawei.com> - 27-7
+- Precisely filters ko files in "/lib/modules/$kernel/extra" 
+  to avoid creating unnecessary symbols.
+
 * Tue Nov 9 2021 Yang Yanchao <yangyanchao6@huawei.com> - 27-6
 - Sync the weak-modules script from the 20.03-LTS-SP1
 - use -V to sort kernel version in weak-modules
diff --git a/weak-modules b/weak-modules
index b4bffa727295f850f9eaffa09f2780ea25746d15..dc7ce2be4ac8e2ac846218630d2dfea759d9e6b8 100644
--- a/weak-modules
+++ b/weak-modules
@@ -985,7 +985,7 @@ filter_extra_absoluted()
     while read i; do
         # skip non-extra. The check is not perfect, but ok
         # to speed up handling in general cases
-        echo "$i" |grep -q "extra/" || continue
+        echo "$i" |grep -q "^extra/" || continue
 
         read -a mods <<< "$i"
         for j in "${!mods[@]}"; do