diff --git a/0030-enhance-pointer-safe.patch b/0030-enhance-pointer-safe.patch
new file mode 100644
index 0000000000000000000000000000000000000000..fdcaf9c2767028cf569a3b67a6c7ebbbfa379e87
--- /dev/null
+++ b/0030-enhance-pointer-safe.patch
@@ -0,0 +1,33 @@
+From 9cf127b4297b8d0e4f3fd34c264d7b1648bad77f Mon Sep 17 00:00:00 2001
+From: Zdenek Kabelac <zkabelac@redhat.com>
+Date: Fri, 3 May 2024 12:38:39 +0200
+Subject: [PATCH] const: suffixes
+
+---
+ tools/lvmcmdline.c | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/tools/lvmcmdline.c b/tools/lvmcmdline.c
+index 66b269538..38e3ce190 100644
+--- a/tools/lvmcmdline.c
++++ b/tools/lvmcmdline.c
+@@ -576,7 +576,7 @@ static int _size_arg(struct cmd_context *cmd __attribute__((unused)),
+ {
+ 	char *ptr;
+ 	int i;
+-	static const char *suffixes = "kmgtpebs";
++	static const char _suffixes[] = "kmgtpebs";
+ 	char *val;
+ 	double v;
+ 	uint64_t v_tmp, adjustment;
+@@ -636,8 +636,8 @@ static int _size_arg(struct cmd_context *cmd __attribute__((unused)),
+ 			return 0;
+ 		}
+ 	} else if (*ptr) {
+-		for (i = strlen(suffixes) - 1; i >= 0; i--)
+-			if (suffixes[i] == tolower((int) *ptr))
++		for (i = sizeof(_suffixes) - 1; i >= 0; --i)
++			if (_suffixes[i] == tolower((int) *ptr))
+ 				break;
+ 
+ 		if (i < 0) {
diff --git a/lvm2.spec b/lvm2.spec
index c4ba03136a3a9d8a2b1222a873318d839738102a..d9731c8d97ffa82c675d3be2a7e1fbe3ff989a04 100644
--- a/lvm2.spec
+++ b/lvm2.spec
@@ -43,7 +43,7 @@
 
 Name:      lvm2
 Version:   2.03.21
-Release:   20
+Release:   21
 Epoch:     8
 Summary:   Tools for logical volume management
 License:   GPLv2+ and LGPLv2.1 and BSD
@@ -78,6 +78,7 @@ Patch26:   0026-fix-pv_major-and-pv_minor-report-field-type.patch
 Patch27:   0027-vgsplit-fix-check-for-not-splitting-an-LV-between-tw.patch
 Patch28:   0028-vgsplit-fix-check-for-not-splitting-an-LV-between-tw.patch
 Patch29:   0029-add-internal-error-for-missing-vg.patch
+Patch30:   0030-enhance-pointer-safe.patch
 
 BuildRequires: gcc
 BuildRequires: gcc-c++
@@ -504,6 +505,9 @@ fi
 
 
 %changelog
+* Thu Nov 13 2025 weishuaihao <weishuaihao@kylinos.cn> - 8:2.03.21-21 
+- enhance pointer safe
+
 * Wed Nov 12 2025 weishuaihao <weishuaihao@kylinos.cn> - 8:2.03.21-20
 - add internal error for missing vg