From 4e74b9f592b7e0775800f212052c18c44128f89b Mon Sep 17 00:00:00 2001
From: Joshua Rogers <MegaManSec@users.noreply.github.com>
Date: Thu, 18 Sep 2025 03:43:11 +0500
Subject: [PATCH] socks_sspi: restore non-blocking socket on error paths

Closes #18592
---
 lib/socks_sspi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/socks_sspi.c b/lib/socks_sspi.c
index 49210585b0..c106fec0c8 100644
--- a/lib/socks_sspi.c
+++ b/lib/socks_sspi.c
@@ -559,6 +559,7 @@ CURLcode Curl_SOCKS5_gssapi_negotiate(struct Curl_cfilter *cf,
   */
   return CURLE_OK;
 error:
+  (void)curlx_nonblock(sock, TRUE);
   free(service_name);
   Curl_pSecFn->FreeCredentialsHandle(&cred_handle);
   Curl_pSecFn->DeleteSecurityContext(&sspi_context);