tests: Add test case to validate free-list indexes

Signed-off-by: Anoop C S <anoopcs@redhat.com>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>

2 files changed, 76 insertions, 1 deletions

diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 08abcad..26173bb 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -42,7 +42,8 @@ set(SWRAP_TESTS
     test_thread_echo_tcp_connect
     test_thread_echo_tcp_write_read
     test_thread_echo_tcp_sendmsg_recvmsg
-    test_thread_echo_udp_send_recv)
+    test_thread_echo_udp_send_recv
+    test_tcp_socket_overwrite)
 
 if (HAVE_STRUCT_MSGHDR_MSG_CONTROL)
     set(SWRAP_TESTS ${SWRAP_TESTS} test_sendmsg_recvmsg_fd)
diff --git a/tests/test_tcp_socket_overwrite.c b/tests/test_tcp_socket_overwrite.c
new file mode 100644
index 0000000..9695e33
--- /dev/null
+++ b/tests/test_tcp_socket_overwrite.c
@@ -0,0 +1,74 @@
+#include "torture.h"
+
+#include <cmocka.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <errno.h>
+
+static int setup(void **state)
+{
+	torture_setup_socket_dir(state);
+
+	return 0;
+}
+
+static int teardown(void **state)
+{
+	torture_teardown_socket_dir(state);
+
+	return 0;
+}
+
+static void test_tcp_socket_overwrite(void **state)
+{
+	struct torture_address addr_in = {
+		.sa_socklen = sizeof(struct sockaddr_in),
+	};
+
+	int s, dup_s, new_s, rc;
+
+	(void) state; /* unused */
+
+	s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+	assert_int_not_equal(s, -1);
+
+	dup_s = dup(s);
+	assert_int_not_equal(dup_s, -1);
+
+	close(dup_s);
+
+	new_s = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
+	assert_int_not_equal(new_s, -1);
+
+	close(new_s);
+
+	addr_in = (struct torture_address) {
+		.sa_socklen = sizeof(struct sockaddr_in),
+		.sa.in = (struct sockaddr_in) {
+			.sin_family = AF_INET,
+		},
+	};
+
+	rc = inet_pton(AF_INET, "127.0.0.20", &addr_in.sa.in.sin_addr);
+	assert_int_equal(rc, 1);
+
+	/* bind should fail during socklen check if old socket info
+	 * is overwritten by new socket info */
+	rc = bind(s, &addr_in.sa.s, addr_in.sa_socklen);
+	assert_return_code(rc, errno);
+
+	close(s);
+}
+
+int main(void) {
+	int rc;
+
+	const struct CMUnitTest tcp_socket_overwrite_tests[] = {
+		cmocka_unit_test(test_tcp_socket_overwrite),
+	};
+
+	rc = cmocka_run_group_tests(tcp_socket_overwrite_tests,
+				    setup, teardown);
+
+	return rc;
+}