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>
#include <linux/if_addrlabel.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/if_addrlabel.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
+#include <linux/refcount.h>
#if 0
#define ADDRLABEL(x...) printk(x)
#if 0
#define ADDRLABEL(x...) printk(x)
int addrtype;
u32 label;
struct hlist_node list;
int addrtype;
u32 label;
struct hlist_node list;
static bool ip6addrlbl_hold(struct ip6addrlbl_entry *p)
{
static bool ip6addrlbl_hold(struct ip6addrlbl_entry *p)
{
- return atomic_inc_not_zero(&p->refcnt);
+ return refcount_inc_not_zero(&p->refcnt);
}
static inline void ip6addrlbl_put(struct ip6addrlbl_entry *p)
{
}
static inline void ip6addrlbl_put(struct ip6addrlbl_entry *p)
{
- if (atomic_dec_and_test(&p->refcnt))
+ if (refcount_dec_and_test(&p->refcnt))
call_rcu(&p->rcu, ip6addrlbl_free_rcu);
}
call_rcu(&p->rcu, ip6addrlbl_free_rcu);
}
newp->label = label;
INIT_HLIST_NODE(&newp->list);
write_pnet(&newp->lbl_net, net);
newp->label = label;
INIT_HLIST_NODE(&newp->list);
write_pnet(&newp->lbl_net, net);
- atomic_set(&newp->refcnt, 1);
+ refcount_set(&newp->refcnt, 1);