From 4f1e213f727c16dd715d0d75ca7746e4a75ba672 Mon Sep 17 00:00:00 2001
From: jbasney <jbasney>
Date: Wed, 18 Aug 2004 21:20:09 +0000
Subject: [PATCH] be sure not to call xfree(NULL)

---
 openssh/auth2-gss.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/openssh/auth2-gss.c b/openssh/auth2-gss.c
index 917cec7..a238e6d 100644
--- a/openssh/auth2-gss.c
+++ b/openssh/auth2-gss.c
@@ -234,11 +234,11 @@ input_gssapi_errtok(int type, u_int32_t plen, void *ctxt)
 static void
 gssapi_set_implicit_username(Authctxt *authctxt)
 {
-    if ((authctxt->user == NULL) || (strcmp(authctxt->user, "") == 0)) {
+    if ((authctxt->user == NULL) || (authctxt->user[0] == '\0')) {
 	char *lname = NULL;
 	PRIVSEP(ssh_gssapi_localname(&lname));
 	if (lname && lname[0] != '\0') {
-	    xfree(authctxt->user);
+	    if (authctxt->user) xfree(authctxt->user);
 	    authctxt->user = lname;
 	    debug("set username to %s from gssapi context", lname);
 	    authctxt->pw = PRIVSEP(getpwnamallow(authctxt->user));
-- 
2.45.2