!135 fix readutmp-systemd coredump

From: @wave-information_0 
Reviewed-by: @dillon_chen 
Signed-off-by: @dillon_chen

coreutils.spec

@@ -1,6 +1,6 @@
 Name:       coreutils
 Version:    9.4
-Release:    2
+Release:    3
 License:    GPLv3+
 Summary:    A set of basic GNU tools commonly used in shell scripts
 Url:        https://www.gnu.org/software/coreutils/
@@ -23,7 +23,7 @@ Patch8:    backport-coreutils-df-direct.patch
 Patch9:    backport-coreutils-i18n.patch
 patch10:   backport-CVE-2024-0684-split-do-not-shrink-hold-buffer.patch
 patch11:   test-skip-overlay-filesystem-because-of-no-inotify_add_watch.patch
-
+patch12:   fix-coredump-if-enable-systemd.patch
 %ifarch sw_64
 Patch9001:   coreutils-9.0-sw.patch
 %endif
@@ -155,6 +155,9 @@ fi
 %{_mandir}/man*/*
 
 %changelog
+* Fri Mar 15 2024 xueyamao<xueyamao@kylinos.cn> - 9.4-3
+- fix coredump if enable systemd
+
 * Fri Feb 2 2024 jiangchuangang <jiangchuangang@huawei.com> - 9.4-2
 - skip testcase for overlay filesystem because of no inotify_add_watch
   add test-skip-overlay-filesystem-because-of-no-inotify_add_watch.patch 

fix-coredump-if-enable-systemd.patch

@@ -0,0 +1,35 @@
+From d501347a8ae23a2fb312949c588c7565eb54b2da Mon Sep 17 00:00:00 2001
+From: Paul Eggert  <eggert@cs.ucla.edu>	
+Date: Mon, 18 Mar 2024 09:10:31 +0800
+Subject: [PATCH] fix core dump if --enable-systemd
+
+From gnulib upstream commits:
+* 1e6a26f9312bb47e070f94b17b14dc1a6ffbb74f ("readutmp: fix core dump if --enable-systemd")
+Problem reported by Thorsten Kukuk <https://bugs.gnu.org/65617>.
+lib/readutmp.c (read_utmp_from_systemd):
+Don’t assume session_ptr != NULL if num_sessions == 0.
+In practice it can be null, and the man page OKs this behavior.
+
+* 3af1d7b0ce3a8e3ae565e7cea10cee6fd7cb8109 ("readutmp: Fix memory leak introduced by last commit.")
+lib/readutmp.c (read_utmp_from_systemd): If num_sessions == 0 and
+sessions != NULL, do call free (sessions).
+---
+ lib/readutmp.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/readutmp.c b/lib/readutmp.c
+index 0173b7e..ec09feb 100644
+--- a/lib/readutmp.c
++++ b/lib/readutmp.c
+@@ -795,7 +795,7 @@ read_utmp_from_systemd (idx_t *n_entries, STRUCT_UTMP **utmp_buf, int options)
+     {
+       char **sessions;
+       int num_sessions = sd_get_sessions (&sessions);
+-      if (num_sessions >= 0)
++      if (num_sessions >= 0 && sessions != NULL)
+         {
+           char **session_ptr;
+           for (session_ptr = sessions; *session_ptr != NULL; session_ptr++)
+-- 
+2.41.0
+