diff --git a/0042-avoid-processing-invalid-to_dlm_mode-in-lm_convert_dlm.patch b/0042-avoid-processing-invalid-to_dlm_mode-in-lm_convert_dlm.patch
new file mode 100644
index 0000000000000000000000000000000000000000..fe77be0d84f23f40773ab3874cba9236c701248e
--- /dev/null
+++ b/0042-avoid-processing-invalid-to_dlm_mode-in-lm_convert_dlm.patch
@@ -0,0 +1,36 @@
+From 8716d8c1886fb459c25f8adf69a671f0941bade4 Mon Sep 17 00:00:00 2001
+From: Zdenek Kabelac <zkabelac@redhat.com>
+Date: Mon, 25 Mar 2024 14:33:40 +0100
+Subject: [PATCH] cov: check for to_dlm_mode return value
+
+Avoid processing invalid to_dlm_mode in lm_convert_dlm.
+---
+ daemons/lvmlockd/lvmlockd-dlm.c | 8 +++++---
+ 1 file changed, 5 insertions(+), 3 deletions(-)
+
+diff --git a/daemons/lvmlockd/lvmlockd-dlm.c b/daemons/lvmlockd/lvmlockd-dlm.c
+index 52a293abb..528fe7aa9 100644
+--- a/daemons/lvmlockd/lvmlockd-dlm.c
++++ b/daemons/lvmlockd/lvmlockd-dlm.c
+@@ -552,7 +552,7 @@ int lm_convert_dlm(struct lockspace *ls, struct resource *r,
+ 	struct lm_dlm *lmd = (struct lm_dlm *)ls->lm_data;
+ 	struct rd_dlm *rdd = (struct rd_dlm *)r->lm_data;
+ 	struct dlm_lksb *lksb = &rdd->lksb;
+-	uint32_t mode;
++	int mode;
+ 	uint32_t flags = 0;
+ 	int rv;
+ 
+@@ -576,8 +576,10 @@ int lm_convert_dlm(struct lockspace *ls, struct resource *r,
+ 		flags |= LKF_VALBLK;
+ 	}
+ 
+-	mode = to_dlm_mode(ld_mode);
+-
++	if ((mode = to_dlm_mode(ld_mode)) < 0) {
++		log_error("lm_convert_dlm invalid mode %d", ld_mode);
++		return -EINVAL;
++	}
+ 	if (daemon_test)
+ 		return 0;
+ 
diff --git a/lvm2.spec b/lvm2.spec
index 2f0deb9541b08790c7a5b606a14a6b3f5200a0b4..ccbbcf281d7b310b98c7d83aae717fc9eed42485 100644
--- a/lvm2.spec
+++ b/lvm2.spec
@@ -43,7 +43,7 @@
 
 Name:      lvm2
 Version:   2.03.14
-Release:   23
+Release:   24
 Epoch:     8
 Summary:   Tools for logical volume management
 License:   GPLv2+ and LGPLv2.1 and BSD
@@ -90,6 +90,7 @@ Patch38:   0038-fix-buffer-size-usage.patch
 Patch39:   0039-add-internal-error-for-missing-vg.patch
 Patch40:   0040-enhance-pointer-safe.patch
 Patch41:   0041-lvmdbusd-fix-Python-script.patch
+Patch42:   0042-avoid-processing-invalid-to_dlm_mode-in-lm_convert_dlm.patch
 
 BuildRequires: gcc
 BuildRequires: gcc-c++
@@ -516,6 +517,9 @@ fi
 
 
 %changelog
+* Mon Nov 17 2025 weishuaihao <weishuaihao@kylinos.cn> - 8:2.03.14-24
+- cov: check for to_dlm_mode return value
+
 * Fri Nov 14 2025 weishuaihao <weishuaihao@kylinos.cn> - 8:2.03.14-23
 - lvmdbusd: Fix Python script