From a782867c9f966b2daeb67a4438bc4c26c6bbd46b Mon Sep 17 00:00:00 2001
From: Stefan Eissing <stefan@eissing.org>
Date: Wed, 10 Sep 2025 11:55:24 +0200
Subject: [PATCH] curl_easy_getinfo: error code on NULL arg

When passing an address to curl_easy_getinfo to retrieve a value and the
address is NULL, return CURLE_BAD_FUNCTION_ARGUMENT instead of
CURLE_UNKNOWN_OPTION.

Closes #18512
---
 lib/getinfo.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/getinfo.c b/lib/getinfo.c
index 7ff78d2d6d..e2a8231d53 100644
--- a/lib/getinfo.c
+++ b/lib/getinfo.c
@@ -621,7 +621,7 @@ CURLcode Curl_getinfo(struct Curl_easy *data, CURLINFO info, ...)
   struct curl_slist **param_slistp = NULL;
   curl_socket_t *param_socketp = NULL;
   int type;
-  CURLcode result = CURLE_UNKNOWN_OPTION;
+  CURLcode result = CURLE_BAD_FUNCTION_ARGUMENT;
 
   if(!data)
     return CURLE_BAD_FUNCTION_ARGUMENT;
@@ -661,6 +661,7 @@ CURLcode Curl_getinfo(struct Curl_easy *data, CURLINFO info, ...)
       result = getinfo_socket(data, info, param_socketp);
     break;
   default:
+    result = CURLE_UNKNOWN_OPTION;
     break;
   }
 
-- 
2.47.3