fix memory leak in kex2 exchange function

Signed-off-by: Corwin-Song <songjuntao@kylinos.cn>
(cherry picked from commit aaf74beffae0f0b281357bdf9e895942ee0ed11d)

fix-memory-leak-in-kex-exchange.patch

@@ -0,0 +1,25 @@
+From c1345cb819e50e55ae1d3245e148da90260255ca Mon Sep 17 00:00:00 2001
+From: songjuntao <songjuntao@kylinos.cn>
+Date: Fri, 2 Feb 2024 16:05:29 +0800
+Subject: [PATCH] fix memory leak in kex exchange function
+
+Signed-off-by: songjuntao <songjuntao@kylinos.cn>
+---
+ sshconnect2.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/sshconnect2.c b/sshconnect2.c
+index b82a118..ae018ff 100644
+--- a/sshconnect2.c
++++ b/sshconnect2.c
+@@ -354,6 +354,7 @@ ssh_kex2(struct ssh *ssh, char *host, struct sockaddr *hostaddr, u_short port)
+ 	    (r = ssh_packet_write_wait(ssh)) != 0)
+ 		fatal("%s: %s", __func__, ssh_err(r));
+ #endif
++	free(s);
+ }
+ 
+ /*
+-- 
+2.33.0
+

openssh.spec

@@ -6,7 +6,7 @@
 %{?no_gtk2:%global gtk2 0}
 
 %global sshd_uid    74
-%global openssh_release 29
+%global openssh_release 30
 
 Name:           openssh
 Version:        8.2p1
@@ -105,6 +105,7 @@ Patch71:        backport-fix-CVE-2023-38408-upstream-terminate-process.patch
 Patch72:        set-ssh-config.patch
 Patch73:        backport-CVE-2023-51385-upstream-ban-user-hostnames-with-most-shell-metachar.patch
 Patch74:        backport-CVE-2023-48795.patch
+Patch75:        fix-memory-leak-in-kex-exchange.patch
 
 Requires:       /sbin/nologin
 Requires:       libselinux >= 2.3-5 audit-libs >= 1.0.8
@@ -282,6 +283,7 @@ popd
 %patch72 -p1
 %patch73 -p1
 %patch74 -p1
+%patch75 -p1
 
 autoreconf
 pushd pam_ssh_agent_auth-0.10.3
@@ -491,6 +493,12 @@ getent passwd sshd >/dev/null || \
 %attr(0644,root,root) %{_mandir}/man8/sftp-server.8*
 
 %changelog
+* Fri Feb 2 2024 songjuntao<songjuntao@kylinos.cn> - 8.2p1-30
+- Type:bugfix
+- CVE:
+- SUG:NA
+- DESC: fix memory leak in kex2 exchange function
+
 * Tue Jan 9 2024 renmingshuai<renmingshuai@huawei.cn> - 8.2p1-29
 - Type:CVE
 - CVE:CVE-2023-48795