diff --git a/0003-thin_ll_dump-Fix-potential-segfault-while-reading-in.patch b/0003-thin_ll_dump-Fix-potential-segfault-while-reading-in.patch
new file mode 100644
index 0000000000000000000000000000000000000000..b46c0029590c6932c193b8aafe5e339e6b40270e
--- /dev/null
+++ b/0003-thin_ll_dump-Fix-potential-segfault-while-reading-in.patch
@@ -0,0 +1,44 @@
+From f3c2ade90acbd1ac9a9391ff8e09fbe252a63b45 Mon Sep 17 00:00:00 2001
+From: Ming-Hung Tsai <mtsai@redhat.com>
+Date: Tue, 12 Oct 2021 23:19:00 +0800
+Subject: [PATCH] [thin_ll_dump] Fix potential segfault while reading invalid
+ subtree roots
+
+---
+ thin-provisioning/thin_ll_dump.cc | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/thin-provisioning/thin_ll_dump.cc b/thin-provisioning/thin_ll_dump.cc
+index e6048d0..9207cd2 100644
+--- a/thin-provisioning/thin_ll_dump.cc
++++ b/thin-provisioning/thin_ll_dump.cc
+@@ -135,7 +135,9 @@ namespace {
+ 	public:
+ 		ll_mapping_tree_emitter(block_manager::ptr bm,
+ 					indented_stream &out)
+-			: bm_(bm), out_(out) {
++			: bm_(bm),
++			  nv_(create_btree_node_validator()),
++			  out_(out) {
+ 		}
+ 
+ 		void visit(btree_path const &path, block_address tree_root) {
+@@ -147,6 +149,7 @@ namespace {
+ 			try {
+ 				block_manager::read_ref rr = bm_->read_lock(tree_root);
+ 				node_ref<uint64_traits> n = btree_detail::to_node<uint64_traits>(rr);
++				nv_->check(n.raw(), tree_root);
+ 				node_info ni;
+ 				convert_to_node_info(n, ni);
+ 				output_node_info(out_, ni);
+@@ -160,6 +163,7 @@ namespace {
+ 		}
+ 	private:
+ 		block_manager::ptr bm_;
++		bcache::validator::ptr nv_;
+ 		indented_stream& out_;
+ 	};
+ 
+-- 
+2.33.0
+
diff --git a/thin-provisioning-tools.spec b/thin-provisioning-tools.spec
index d4f301d150bade996be4b0b85fb32f3e4fc68bdd..f0f1044e8cc6be27f47a9dd59e6cdd02e5343ce1 100644
--- a/thin-provisioning-tools.spec
+++ b/thin-provisioning-tools.spec
@@ -1,12 +1,13 @@
 Name:    thin-provisioning-tools
 Version: 0.9.0
-Release: 3
+Release: 4
 Summary: Tools for manipulating Device-mapper metadata
 License: GPLv3+
 URL:     https://github.com/jthornber/thin-provisioning-tools
 Source0: https://github.com/jthornber/thin-provisioning-tools/archive/v%{version}.tar.gz
 Patch1:  0001-device-mapper-persistent-data-avoid-strip.patch
 Patch2:  0002-build-remove-lboost_iostreams-linker-flag.patch
+Patch3:  0003-thin_ll_dump-Fix-potential-segfault-while-reading-in.patch
 
 BuildRequires: autoconf, expat-devel
 BuildRequires: libaio-devel, libstdc++-devel
@@ -51,6 +52,9 @@ make DESTDIR=%{buildroot} MANDIR=%{_mandir} install
 %{_mandir}/man*/*
 
 %changelog
+* Fri Nov 4 2022 wuguanghao <wuguanghao3@huawei.com> - 0.9.0-4
+- backport bugfix patch from community
+
 * Wed Sep 15 2021 Liu Zixian <liuzixian4@huawei.com> - 0.9.0-3
 - Remove redundant dependency