diff --git a/0001-sanlock-fix-zero-io-timeout-for-direct-lockspace-req.patch b/0001-sanlock-fix-zero-io-timeout-for-direct-lockspace-req.patch
new file mode 100644
index 0000000000000000000000000000000000000000..b0dd5d7045140792c3f0648a1e5682d8805fbd85
--- /dev/null
+++ b/0001-sanlock-fix-zero-io-timeout-for-direct-lockspace-req.patch
@@ -0,0 +1,25 @@
+From 77ad5324fbad7558dd555cd7cabb0fa22a49e38a Mon Sep 17 00:00:00 2001
+From: David Teigland <teigland@redhat.com>
+Date: Wed, 30 Apr 2025 11:06:51 -0500
+Subject: [PATCH] sanlock: fix zero io timeout for direct lockspace requests
+
+---
+ src/direct.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/src/direct.c b/src/direct.c
+index 208dd3509b14..e009de1a44b5 100644
+--- a/src/direct.c
++++ b/src/direct.c
+@@ -314,6 +314,8 @@ static int do_delta_action(int action,
+ 
+ 	if (!io_timeout)
+ 		io_timeout = com.io_timeout;
++	if (!io_timeout)
++		io_timeout = DEFAULT_IO_TIMEOUT;
+ 
+ 	rv = sizes_from_flags(ls->flags, &sector_size, &align_size, &max_hosts, "LSF");
+ 	if (rv)
+-- 
+2.48.1
+
diff --git a/sanlock-4.0.0.tar.gz b/sanlock-4.0.0.tar.gz
new file mode 100644
index 0000000000000000000000000000000000000000..625c8e436fc3ad0728abe9b6f5a4aa1e08a6fd75
Binary files /dev/null and b/sanlock-4.0.0.tar.gz differ
diff --git a/sanlock.spec b/sanlock.spec
index e8608c89c9f64bf8051913990900f4826bfed517..4046e667c390e7abff90f9e5f18206527e269211 100644
--- a/sanlock.spec
+++ b/sanlock.spec
@@ -1,12 +1,13 @@
-%define anolis_release 1
+%define anolis_release		1
 
 Name:           sanlock
-Version:        3.9.5
+Version:	4.0.0
 Release:        %{anolis_release}%{?dist}
 Summary:        A shared storage lock manager
 
 License:        GPLv2 and GPLv2+ and LGPLv2+
 URL:            https://pagure.io/sanlock/
+Source0:	https://releases.pagure.org/sanlock/sanlock-4.0.0.tar.gz
 BuildRequires:  gcc
 BuildRequires:  libaio-devel
 BuildRequires:  libblkid-devel
@@ -23,10 +24,10 @@ Requires(post): systemd-units
 Requires(post): systemd-sysv
 Requires(preun): systemd-units
 Requires(postun): systemd-units
-Source0:        https://releases.pagure.org/sanlock/%{name}-%{version}.tar.gz
 
 Patch0001: 0001-systemd-wdmd-work-around-race-with-udev-setting-soft.patch
 Patch0002: 0002-sanlock-new-NODELAY-flag-for-add_lockspace.patch
+Patch3:	0001-sanlock-fix-zero-io-timeout-for-direct-lockspace-req.patch
 
 %description
 The sanlock daemon manages leases for applications on hosts using shared storage.
@@ -181,6 +182,10 @@ Doc files for %{name}
 %doc README.rst
 
 %changelog
+* Tue Oct 28 2025 wenyuzifang <lzx02244079@alibaba-inc.com> - 4.0.0-1
+- Updated to version 4.0.0 to fix xxxxxx
+- Prevent infinite I/O waits by ensuring a default timeout is always applied.
+
 * Tue Mar 4 2025 Chang Gao <gc-taifu@linux.alibaba.com> - 3.9.5-1
 - Update to 3.9.5
 - Add patch to work around race with udev setting softdog label