From 098d7f8e2e2b468e6a615084fb4330fed49bb54a Mon Sep 17 00:00:00 2001
From: hanzhijun <hanzhijun1@huawei.com>
Date: Mon, 24 Aug 2020 15:39:53 +0800
Subject: [PATCH] fix coredump when client -> active is NULL

---
 client/dhclient.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/client/dhclient.c b/client/dhclient.c
index 2a17bfd..7581670 100644
--- a/client/dhclient.c
+++ b/client/dhclient.c
@@ -2059,6 +2059,24 @@ void state_bound (cpp)
 	struct data_string ds;
 
 	ASSERT_STATE(state, S_BOUND);
+	if (!client -> active)
+	{
+		struct timeval tv;
+
+		log_error ("No active lease in bound.");
+		script_init(client, "FAIL", (struct string_list *)0);
+		if (client -> alias)
+			script_write_params(client, "alias_", client -> alias);
+		script_go(client);
+		client -> state = S_INIT;
+		tv.tv_sec = cur_tv.tv_sec + ((client->config->retry_interval + 1) / 2 +
+			    (random() % client->config->retry_interval));
+		tv.tv_usec = ((tv.tv_sec - cur_tv.tv_sec) > 1) ?
+				random() % 1000000 : cur_tv.tv_usec;
+		add_timeout(&tv, state_init, client, 0, 0);
+		detach ();
+		return;
+	}
 
 	/* T1 has expired. */
 	make_request (client, client -> active);
@@ -3173,6 +3191,25 @@ void send_request (cpp)
 		return;
 	}
 
+        if (!client -> active && client -> state != S_REQUESTING)
+        {
+                struct timeval tv;
+
+                log_error ("No active lease in request.");
+                script_init(client, "FAIL", (struct string_list *)0);
+                if (client -> alias)
+                        script_write_params(client, "alias_", client -> alias);
+                script_go(client);
+                client -> state = S_INIT;
+                tv.tv_sec = cur_tv.tv_sec + ((client->config->retry_interval + 1) / 2 +
+                            (random() % client->config->retry_interval));
+                tv.tv_usec = ((tv.tv_sec - cur_tv.tv_sec) > 1) ?
+                                random() % 1000000 : cur_tv.tv_usec;
+                add_timeout(&tv, state_init, client, 0, 0);
+                detach ();
+                return;
+        }
+
 	/* If we're in the reboot state, make sure the media is set up
 	   correctly. */
 	if (client -> state == S_REBOOTING &&
-- 
2.27.0