diff options
| -rw-r--r-- | lib/vtls/schannel.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/lib/vtls/schannel.c b/lib/vtls/schannel.c index 56fd93e1e..ab7f83f46 100644 --- a/lib/vtls/schannel.c +++ b/lib/vtls/schannel.c @@ -7,7 +7,7 @@ * * Copyright (C) 2012 - 2016, Marc Hoersken, <info@marc-hoersken.de> * Copyright (C) 2012, Mark Salisbury, <mark.salisbury@hp.com> - * Copyright (C) 2012 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al. + * Copyright (C) 2012 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms @@ -2013,9 +2013,16 @@ static int Curl_schannel_shutdown(struct connectdata *conn, int sockindex) /* free SSPI Schannel API credential handle */ if(BACKEND->cred) { - Curl_ssl_sessionid_lock(conn); + /* + * When this function is called from Curl_schannel_close() the connection + * might not have an associated transfer so the check for conn->data is + * necessary. + */ + if(conn->data) + Curl_ssl_sessionid_lock(conn); Curl_schannel_session_free(BACKEND->cred); - Curl_ssl_sessionid_unlock(conn); + if(conn->data) + Curl_ssl_sessionid_unlock(conn); BACKEND->cred = NULL; } |