From: Jay Satiro <raysatiro@yahoo.com>
Date: Wed, 27 Aug 2025 02:33:38 +0000 (-0400)
Subject: schannel: fix memory leak during handshake
X-Git-Tag: curl-8_16_0~75
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b9be9f9466665f259696bc8903a239ed8fd793a2;p=thirdparty%2Fcurl.git

schannel: fix memory leak during handshake

Follow-up to b6a5f672 which improved the handshake procedure.

Ref: https://github.com/curl/curl/pull/18323

Closes https://github.com/curl/curl/pull/18410
---

diff --git a/lib/vtls/schannel.c b/lib/vtls/schannel.c
index 7fb4cb1fde..e75351f12f 100644
--- a/lib/vtls/schannel.c
+++ b/lib/vtls/schannel.c
@@ -1246,6 +1246,7 @@ schannel_connect_step2(struct Curl_cfilter *cf, struct Curl_easy *data)
     if(!SOCKET_WRITABLE(Curl_conn_cf_get_socket(cf, data), 0)) {
       SCH_DEV(infof(data, "schannel: handshake waiting for writeable socket"));
       connssl->io_need = CURL_SSL_IO_NEED_SEND;
+      free(inbuf[0].pvBuffer);
       return CURLE_OK;
     }