linux/include/net/calipso.h
Reshetova, Elena edcd9270be net, calipso: convert calipso_doi.refcount from atomic_t to refcount_t
refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.

Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-04 22:35:16 +01:00

92 lines
2.1 KiB
C

/*
* CALIPSO - Common Architecture Label IPv6 Security Option
*
* This is an implementation of the CALIPSO protocol as specified in
* RFC 5570.
*
* Authors: Paul Moore <paul@paul-moore.com>
* Huw Davies <huw@codeweavers.com>
*
*/
/*
* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
* (c) Copyright Huw Davies <huw@codeweavers.com>, 2015
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef _CALIPSO_H
#define _CALIPSO_H
#include <linux/types.h>
#include <linux/rcupdate.h>
#include <linux/list.h>
#include <linux/net.h>
#include <linux/skbuff.h>
#include <net/netlabel.h>
#include <net/request_sock.h>
#include <linux/refcount.h>
#include <asm/unaligned.h>
/* known doi values */
#define CALIPSO_DOI_UNKNOWN 0x00000000
/* doi mapping types */
#define CALIPSO_MAP_UNKNOWN 0
#define CALIPSO_MAP_PASS 2
/*
* CALIPSO DOI definitions
*/
/* DOI definition struct */
struct calipso_doi {
u32 doi;
u32 type;
refcount_t refcount;
struct list_head list;
struct rcu_head rcu;
};
/*
* Sysctl Variables
*/
extern int calipso_cache_enabled;
extern int calipso_cache_bucketsize;
#ifdef CONFIG_NETLABEL
int __init calipso_init(void);
void calipso_exit(void);
bool calipso_validate(const struct sk_buff *skb, const unsigned char *option);
#else
static inline int __init calipso_init(void)
{
return 0;
}
static inline void calipso_exit(void)
{
}
static inline bool calipso_validate(const struct sk_buff *skb,
const unsigned char *option)
{
return true;
}
#endif /* CONFIG_NETLABEL */
#endif /* _CALIPSO_H */