backport some patches

(cherry picked from commit dab008ef9821e09dc971f680a51f3ffb3fb27551)

backport-src-useradd-free-string.patch

@@ -0,0 +1,27 @@
+From 92b889b671afb8e77cb9945a97088c6a63130067 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Christian=20G=C3=B6ttsche?= <cgzones@googlemail.com>
+Date: Mon, 11 Dec 2023 17:27:44 +0100
+Subject: [PATCH] src/useradd: free string
+ 
+    useradd.c:2329:10: warning: Potential leak of memory pointed to by 'btrfs_check' [unix.Malloc]
+ 
+Reference: https://github.com/shadow-maint/shadow/commit/92b889b671afb8e77cb9945a97088c6a63130067
+Conflict: NA
+---
+ src/useradd.c | 1 +
+ 1 file changed, 1 insertion(+)
+ 
+diff --git a/src/useradd.c b/src/useradd.c
+index f567d54..2e8725d 100644
+--- a/src/useradd.c
++++ b/src/useradd.c
+@@ -2257,6 +2257,7 @@ static void create_home (void)
+ 						         Prog, path);
+ 						fail_exit (E_HOMEDIR);
+ 					}
++					free(btrfs_check);
+ 					// make subvolume to mount for user instead of directory
+ 					if (btrfs_create_subvolume(path)) {
+ 						fprintf (stderr,
+-- 
+2.27.0

shadow.spec

@@ -1,6 +1,6 @@
 Name: shadow
 Version: 4.9
-Release: 15
+Release: 16
 Epoch: 2
 License: BSD and GPLv2+
 Summary: Tools for managing accounts and shadow password files
@@ -96,6 +96,7 @@ Patch76: backport-shadow-userdel-add-the-adaptation-to-the-busybox-ps-.patch
 Patch77: backport-lib-btrfs-avoid-NULL-dereference.patch
 Patch78: backport-src-passwd.c-Switch-to-day-precision.patch
 Patch79: backport-src-passwd-add-overflow-check.patch 
+Patch80: backport-src-useradd-free-string.patch
 
 BuildRequires: gcc, libselinux-devel, audit-libs-devel, libsemanage-devel
 BuildRequires: libacl-devel, libattr-devel
@@ -265,6 +266,9 @@ rm -f $RPM_BUILD_ROOT/%{_libdir}/libsubid.la
 %{_mandir}/*/*
 
 %changelog
+* Sat Mar 16 2024 zhengxiaoxiao <zhengxiaoxiao2@huawei.com> - 2:4.9-16
+- backport some patches
+
 * Sun Feb 4 2024 zhengxiaoxiao <zhengxiaoxiao2@huawei.com> - 2:4.9-15
 - backport some patches