--- /dev/null
+From 29e270fc32192e7729057963ae7120663856c93e Mon Sep 17 00:00:00 2001
+From: Guoqing Jiang <gqjiang@suse.com>
+Date: Fri, 19 Oct 2018 12:08:22 +0800
+Subject: tipc: use destination length for copy string
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+From: Guoqing Jiang <gqjiang@suse.com>
+
+commit 29e270fc32192e7729057963ae7120663856c93e upstream.
+
+Got below warning with gcc 8.2 compiler.
+
+net/tipc/topsrv.c: In function ‘tipc_topsrv_start’:
+net/tipc/topsrv.c:660:2: warning: ‘strncpy’ specified bound depends on the length of the source argument [-Wstringop-overflow=]
+ strncpy(srv->name, name, strlen(name) + 1);
+ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+net/tipc/topsrv.c:660:27: note: length computed here
+ strncpy(srv->name, name, strlen(name) + 1);
+ ^~~~~~~~~~~~
+So change it to correct length and use strscpy.
+
+Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
+Acked-by: Ying Xue <ying.xue@windriver.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+diff --git a/net/tipc/topsrv.c b/net/tipc/topsrv.c
+index d8956f7daac4..4bdea0057171 100644
+--- a/net/tipc/topsrv.c
++++ b/net/tipc/topsrv.c
+@@ -651,7 +651,7 @@ int tipc_topsrv_start(struct net *net)
+ srv->max_rcvbuf_size = sizeof(struct tipc_subscr);
+ INIT_WORK(&srv->awork, tipc_topsrv_accept);
+
+- strncpy(srv->name, name, strlen(name) + 1);
++ strscpy(srv->name, name, sizeof(srv->name));
+ tn->topsrv = srv;
+ atomic_set(&tn->subscription_count, 0);
+