freebsd-dev/sys/kgssapi/gss_set_cred_option.c
Rick Macklem 13870d5d7b Piete.Brooks at cl.cam.ac.uk reported via email a crash which was
caused by use of an invalid kgss_gssd_handle during an upcall to
the gssd daemon when it has exited. This patch seems to avoid the
crashes by holding a reference count on the kgss_gssd_handle until
the upcall is done. It also adds a new mutex kgss_gssd_lock used to
make manipulation of kgss_gssd_handle SMP safe.

Tested by:	Illias A. Marinos, Herbert Poeckl
Reviewed by:	jhb
MFC after:	2 weeks
2012-12-18 00:25:48 +00:00

83 lines
2.5 KiB
C

/*-
* Copyright (c) 2008 Isilon Inc http://www.isilon.com/
* Authors: Doug Rabson <dfr@rabson.org>
* Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/kobj.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <kgssapi/gssapi.h>
#include <kgssapi/gssapi_impl.h>
#include "gssd.h"
OM_uint32
gss_set_cred_option(OM_uint32 *minor_status,
gss_cred_id_t *cred,
const gss_OID option_name,
const gss_buffer_t option_value)
{
struct set_cred_option_res res;
struct set_cred_option_args args;
enum clnt_stat stat;
CLIENT *cl;
*minor_status = 0;
cl = kgss_gssd_client();
if (cl == NULL)
return (GSS_S_FAILURE);
if (cred)
args.cred = (*cred)->handle;
else
args.cred = 0;
args.option_name = option_name;
args.option_value = *option_value;
bzero(&res, sizeof(res));
stat = gssd_set_cred_option_1(&args, &res, cl);
CLNT_RELEASE(cl);
if (stat != RPC_SUCCESS) {
*minor_status = stat;
return (GSS_S_FAILURE);
}
if (res.major_status != GSS_S_COMPLETE) {
*minor_status = res.minor_status;
return (res.major_status);
}
return (GSS_S_COMPLETE);
}