config: check for 0 from read

(cherry picked from commit 232d376cffe309432cacb31ea72f6785ee3ba512)

0024-config-check-for-0-from-read.patch

@@ -0,0 +1,31 @@
+From 713310b93d85ffd01aae26f3d878a8b0453fa506 Mon Sep 17 00:00:00 2001
+From: Zdenek Kabelac <zkabelac@redhat.com>
+Date: Wed, 29 Jan 2025 00:00:23 +0100
+Subject: [PATCH] config: check for 0 from read
+
+When the read returns 0, it could mean the file
+was trimmed or some other type of problem.
+In this case abort the potentially endless loop.
+
+Reference: https://github.com/lvmteam/lvm2/commit/e907c3cf9a1c294b6551d525d58f2bd7dbbb1cc5
+Conflict: NA
+---
+ lib/config/config.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/config/config.c b/lib/config/config.c
+index 5986e64..02c757e 100644
+--- a/lib/config/config.c
++++ b/lib/config/config.c
+@@ -536,7 +536,7 @@ int config_file_read_fd(struct dm_config_tree *cft, struct device *dev, dev_io_r
+ 				sz = read(dev_fd(dev), buf + rsize, size - rsize);
+ 			} while ((sz < 0) && ((errno == EINTR) || (errno == EAGAIN)));
+ 
+-			if (sz < 0) {
++			if (sz <= 0) {
+ 				log_sys_error("read", dev_name(dev));
+ 				goto out;
+ 			}
+-- 
+2.33.0
+

lvm2.spec

@@ -43,7 +43,7 @@
 
 Name:      lvm2
 Version:   2.03.21
-Release:   14
+Release:   15
 Epoch:     8
 Summary:   Tools for logical volume management
 License:   GPLv2+ and LGPLv2.1 and BSD
@@ -72,6 +72,7 @@ Patch20:   0020-udev-create-dev-disk-by-label-symlinks-for-DM-devs-t.patch
 Patch21:   0021-lvmcache-fix-memleaks-on-list-removal.patch
 Patch22:   0022-dmstats-Fix-memory-leak-on-error-path.patch
 Patch23:   0023-fix-function-undeclared-in-libdm-common.c-and-dev-cache.c.patch
+Patch24:   0024-config-check-for-0-from-read.patch
 
 BuildRequires: gcc
 BuildRequires: gcc-c++
@@ -498,6 +499,12 @@ fi
 
 
 %changelog
+* Thu Apr 03 2025 chenrenhui <chenrenhui1@huawei.com> - 8:2.03.21-15
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC:check for 0 from read
+
 * Tue Nov 05 2024 shenzhongwei <shenzhongwei@kylinos.cn> - 8:2.03.21-14
 - Type:bugfix
 - ID:NA