https://bugzilla.redhat.com/show_bug.cgi?id=688210

--- mod_auth_kerb-5.4/src/mod_auth_kerb.c.delegation
+++ mod_auth_kerb-5.4/src/mod_auth_kerb.c
@@ -209,6 +209,7 @@ typedef struct krb5_conn_data {
 	char *authline;
 	char *user;
 	char *mech;
+	char *ccname;
 	int  last_return;
 } krb5_conn_data;
 
@@ -875,7 +876,7 @@ create_krb5_ccache(krb5_context kcontext
    int ret;
    krb5_ccache tmp_ccache = NULL;
 
-   ccname = apr_psprintf(r->pool, "FILE:%s/krb5cc_apache_XXXXXX", P_tmpdir);
+   ccname = apr_psprintf(r->connection->pool, "FILE:%s/krb5cc_apache_XXXXXX", P_tmpdir);
    fd = mkstemp(ccname + strlen("FILE:"));
    if (fd < 0) {
       log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
@@ -905,7 +906,7 @@ create_krb5_ccache(krb5_context kcontext
    }
 
    apr_table_setn(r->subprocess_env, "KRB5CCNAME", ccname);
-   apr_pool_cleanup_register(r->pool, ccname, krb5_cache_cleanup,
+   apr_pool_cleanup_register(r->connection->pool, ccname, krb5_cache_cleanup,
 	 		     apr_pool_cleanup_null);
 
    *ccache = tmp_ccache;
@@ -1866,10 +1868,15 @@ already_succeeded(request_rec *r, char *
    if (apr_pool_userdata_get((void**)&conn_data, keyname, r->connection->pool) != 0)
 	return NULL;
 
-   if(conn_data) {
-	if(strcmp(conn_data->authline, auth_line) == 0) {
-		log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "matched previous auth request");
-		return conn_data;
+   if(conn_data && conn_data->ccname != NULL) {
+       apr_finfo_t finfo;
+
+       if (apr_stat(&finfo, conn_data->ccname + strlen("FILE:"), 
+                    APR_FINFO_NORM, r->pool) == APR_SUCCESS
+           && (finfo.valid & APR_FINFO_TYPE)
+           && finfo.filetype == APR_REG) {
+           log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "matched previous auth request");
+           return conn_data;
 	}
    }
    return NULL;
@@ -2001,6 +2008,8 @@ kerb_authenticate_user(request_rec *r)
 	ret = prevauth->last_return;
 	MK_USER = prevauth->user;
 	MK_AUTH_TYPE = prevauth->mech;
+	if (prevauth->ccname)
+		apr_table_setn(r->subprocess_env, "KRB5CCNAME", prevauth->ccname);
    }
 
    /*
@@ -2011,6 +2020,7 @@ kerb_authenticate_user(request_rec *r)
        prevauth->user = apr_pstrdup(r->connection->pool, MK_USER);
        prevauth->authline = apr_pstrdup(r->connection->pool, auth_line);
        prevauth->mech = apr_pstrdup(r->connection->pool, auth_type);
+       prevauth->ccname = apr_pstrdup(r->connection->pool, apr_table_get(r->subprocess_env, "KRB5CCNAME"));
        prevauth->last_return = ret;
        snprintf(keyname, sizeof(keyname) - 1,
            "mod_auth_kerb::connection::%s::%ld",