From 3660e6da80764b7dc184af51556d158d5a352a48 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 6 Oct 2025 18:25:55 +0200
Subject: [PATCH] tftp: return error if it hits an illegal state

Reported-by: Joshua Rogers
Closes #18894
---
 lib/tftp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/tftp.c b/lib/tftp.c
index 56b7afda52..8279f29e65 100644
--- a/lib/tftp.c
+++ b/lib/tftp.c
@@ -564,7 +564,7 @@ static CURLcode tftp_send_first(struct tftp_conn *state,
 
   default:
     failf(state->data, "tftp_send_first: internal error");
-    break;
+    return CURLE_TFTP_ILLEGAL;
   }
 
   return result;
-- 
2.47.3