Fix various check-after-dereference issues in unit tests: found by coverity

6 files changed, 35 insertions, 7 deletions

diff --git a/test/regress.c b/test/regress.c
index 65921420..bd294845 100644
--- a/test/regress.c
+++ b/test/regress.c
@@ -2155,6 +2155,10 @@ test_event_pending(void *ptr)
 	    NULL);
 	t = evtimer_new(data->base, timeout_cb, NULL);
 
+	tt_assert(r);
+	tt_assert(w);
+	tt_assert(t);
+
 	evutil_gettimeofday(&now, NULL);
 	event_add(r, NULL);
 	event_add(t, &tv);
diff --git a/test/regress_buffer.c b/test/regress_buffer.c
index 6a2b6fcc..99a8c0ea 100644
--- a/test/regress_buffer.c
+++ b/test/regress_buffer.c
@@ -1033,6 +1033,8 @@ test_evbuffer_find(void *ptr)
 	unsigned int i;
 	struct evbuffer * buf = evbuffer_new();
 
+	tt_assert(buf);
+
 	/* make sure evbuffer_find doesn't match past the end of the buffer */
 	evbuffer_add(buf, (u_char*)test1, strlen(test1));
 	evbuffer_validate(buf);
@@ -1074,6 +1076,8 @@ test_evbuffer_ptr_set(void *ptr)
 	struct evbuffer_ptr pos;
 	struct evbuffer_iovec v[1];
 
+	tt_assert(buf);
+
 	/* create some chains */
 	evbuffer_reserve_space(buf, 5000, v, 1);
 	v[0].iov_len = 5000;
@@ -1121,6 +1125,9 @@ test_evbuffer_search(void *ptr)
 	struct evbuffer *tmp = evbuffer_new();
 	struct evbuffer_ptr pos, end;
 
+	tt_assert(buf);
+	tt_assert(tmp);
+
 	/* set up our chains */
 	evbuffer_add_printf(tmp, "hello");  /* 5 chars */
 	evbuffer_add_buffer(buf, tmp);
@@ -1200,6 +1207,10 @@ test_evbuffer_callbacks(void *ptr)
 	struct evbuffer *buf_out2 = evbuffer_new();
 	struct evbuffer_cb_entry *cb1, *cb2;
 
+	tt_assert(buf);
+	tt_assert(buf_out1);
+	tt_assert(buf_out2);
+
 	cb1 = evbuffer_add_cb(buf, log_change_callback, buf_out1);
 	cb2 = evbuffer_add_cb(buf, log_change_callback, buf_out2);
 
diff --git a/test/regress_dns.c b/test/regress_dns.c
index b34fb96c..557a63d6 100644
--- a/test/regress_dns.c
+++ b/test/regress_dns.c
@@ -1066,6 +1066,7 @@ test_bufferevent_connect_hostname(void *arg)
 	    &n_accept,
 	    LEV_OPT_REUSEABLE|LEV_OPT_CLOSE_ON_EXEC,
 	    -1, (struct sockaddr *)&sin, sizeof(sin));
+	tt_assert(listener);
 	listener_port = regress_get_socket_port(
 		evconnlistener_get_fd(listener));
 
@@ -1211,6 +1212,7 @@ test_getaddrinfo_async(void *arg)
 	int n_dns_questions = 0;
 
 	struct evdns_base *dns_base = evdns_base_new(data->base, 0);
+	tt_assert(dns_base);
 
 	/* for localhost */
 	evdns_base_load_hosts(dns_base, NULL);
@@ -1705,6 +1707,7 @@ testleak_cleanup(const struct testcase_t *testcase, void *env_)
 {
 	int ok = 0;
 	struct testleak_env_t *env = env_;
+	tt_assert(env);
 #ifdef _EVENT_DISABLE_DEBUG_MODE
 	tt_int_op(allocated_chunks, ==, 0);
 #else
@@ -1713,12 +1716,13 @@ testleak_cleanup(const struct testcase_t *testcase, void *env_)
 #endif
 	ok = 1;
 end:
-	if (env->dns_base)
-		evdns_base_free(env->dns_base, 0);
-	if (env->base)
-		event_base_free(env->base);
-	if (env)
+	if (env) {
+		if (env->dns_base)
+			evdns_base_free(env->dns_base, 0);
+		if (env->base)
+			event_base_free(env->base);
 		free(env);
+	}
 	return ok;
 }
 
diff --git a/test/regress_et.c b/test/regress_et.c
index dee7b936..54ee9326 100644
--- a/test/regress_et.c
+++ b/test/regress_et.c
@@ -173,7 +173,9 @@ test_edgetriggered_mix_error(void *data_)
 
 	/* try mixing edge-triggered and level-triggered to make sure it fails*/
 	ev_et = event_new(base, data->pair[0], EV_READ|EV_ET, read_cb, ev_et);
+	tt_assert(ev_et);
 	ev_lt = event_new(base, data->pair[0], EV_READ, read_cb, ev_lt);
+	tt_assert(ev_lt);
 
 	/* Add edge-triggered, then level-triggered.  Get an error. */
 	tt_int_op(0, ==, event_add(ev_et, NULL));
diff --git a/test/regress_http.c b/test/regress_http.c
index f30b2e36..a8b21ce2 100644
--- a/test/regress_http.c
+++ b/test/regress_http.c
@@ -3213,26 +3213,30 @@ static void
 http_primitives(void *ptr)
 {
 	char *escaped = NULL;
-	struct evhttp *http;
+	struct evhttp *http = NULL;
 
 	escaped = evhttp_htmlescape("<script>");
+	tt_assert(escaped);
 	tt_str_op(escaped, ==, "&lt;script&gt;");
 	free(escaped);
 
 	escaped = evhttp_htmlescape("\"\'&");
+	tt_assert(escaped);
 	tt_str_op(escaped, ==, "&quot;&#039;&amp;");
 
 	http = evhttp_new(NULL);
+	tt_assert(http);
 	tt_int_op(evhttp_set_cb(http, "/test", http_basic_cb, NULL), ==, 0);
 	tt_int_op(evhttp_set_cb(http, "/test", http_basic_cb, NULL), ==, -1);
 	tt_int_op(evhttp_del_cb(http, "/test"), ==, 0);
 	tt_int_op(evhttp_del_cb(http, "/test"), ==, -1);
 	tt_int_op(evhttp_set_cb(http, "/test", http_basic_cb, NULL), ==, 0);
-	evhttp_free(http);
 
  end:
 	if (escaped)
 		free(escaped);
+	if (http)
+		evhttp_free(http);
 }
 
 static void
diff --git a/test/regress_rpc.c b/test/regress_rpc.c
index 922fdc10..e03adcdf 100644
--- a/test/regress_rpc.c
+++ b/test/regress_rpc.c
@@ -734,6 +734,9 @@ rpc_test(void)
 	int i;
 
 	msg = msg_new();
+
+	tt_assert(msg);
+
 	EVTAG_ASSIGN(msg, from_name, "niels");
 	EVTAG_ASSIGN(msg, to_name, "phoenix");