diff --git a/src/fuzz/fuzz-ndisc-rs.c b/src/fuzz/fuzz-ndisc-rs.c
index 3a1e60fc5d..d8d256d127 100644
--- a/src/fuzz/fuzz-ndisc-rs.c
+++ b/src/fuzz/fuzz-ndisc-rs.c
@@ -43,6 +43,9 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
         _cleanup_(sd_event_unrefp) sd_event *e = NULL;
         _cleanup_(sd_ndisc_unrefp) sd_ndisc *nd = NULL;
 
+        if (size > 2048)
+                return 0;
+
         assert_se(sd_event_new(&e) >= 0);
         assert_se(sd_ndisc_new(&nd) >= 0);
         assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0);
diff --git a/src/fuzz/fuzz-ndisc-rs.options b/src/fuzz/fuzz-ndisc-rs.options
new file mode 100644
index 0000000000..60bd9b0b2f
--- /dev/null
+++ b/src/fuzz/fuzz-ndisc-rs.options
@@ -0,0 +1,2 @@
+[libfuzzer]
+max_len = 2048