selftests/bpf: test_xsk: Don't exit immediately if validate_traffic fails

__testapp_validate_traffic() calls exit_with_error() on failures. This
exits the program immediately. It prevents the following tests from
running and isn't compliant with the CI.

Return TEST_FAILURE instead of calling exit_with_error().
Release the resource of the 1st thread if a failure happens between its
creation and the creation of the second thread.

Reviewed-by: Maciej Fijalkowski <[email protected]>
Signed-off-by: Bastien Curutchet (eBPF Foundation) <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexei Starovoitov <[email protected]>

Author: bastien-curutchet

tools/testing/selftests/bpf/test_xsk.c

@@ -1772,12 +1772,12 @@ static int __testapp_validate_traffic(struct test_spec *test, struct ifobject *i
 	err = test_spec_set_mtu(test, test->mtu);
 	if (err) {
 		ksft_print_msg("Error, could not set mtu.\n");
-		exit_with_error(err);
+		return TEST_FAILURE;
 	}
 
 	if (ifobj2) {
 		if (pthread_barrier_init(&barr, NULL, 2))
-			exit_with_error(errno);
+			return TEST_FAILURE;
 		pkt_stream_reset(ifobj2->xsk->pkt_stream);
 	}
 
@@ -1791,8 +1791,12 @@ static int __testapp_validate_traffic(struct test_spec *test, struct ifobject *i
 
 	if (ifobj2) {
 		pthread_barrier_wait(&barr);
-		if (pthread_barrier_destroy(&barr))
-			exit_with_error(errno);
+		if (pthread_barrier_destroy(&barr)) {
+			pthread_kill(t0, SIGUSR1);
+			clean_sockets(test, ifobj1);
+			clean_umem(test, ifobj1, NULL);
+			return TEST_FAILURE;
+		}
 
 		/*Spawn TX thread */
 		pthread_create(&t1, NULL, ifobj2->func_ptr, test);