=== patch --dry-run --forward output (proves fix.diff applies cleanly) ===
cmd: cd /usr/src && patch -p1 --dry-run --forward < DF-1452.diff

APPLIES_OK (verified 2026-07-21 on with-src #0 baseline)

--- fix.diff hunk summary ---
@@ -612,6 +612,10 @@
+	if (size > sizeof(rxd->data)) {
+		if_printf(ifp, "Oversized frame received (size=%u)\n", size);
+		return (EIO);
+	}