diff options
| author | Reshetova, Elena <elena.reshetova@intel.com> | 2017-06-30 13:08:06 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-01 07:39:09 -0700 |
| commit | 717d1e993ad8d24a711775d8f2afbcdc76a520a1 (patch) | |
| tree | 09a1b09f27893fcf37f46f04e197fa4621a2345e /include/net | |
| parent | 8c9814b97002f61846ebf3048e8df5aae52f7828 (diff) | |
net: convert fib_rule.refcnt 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>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/fib_rules.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/net/fib_rules.h b/include/net/fib_rules.h index 76c7300626d6..c487bfa2f479 100644 --- a/include/net/fib_rules.h +++ b/include/net/fib_rules.h @@ -5,6 +5,7 @@ #include <linux/slab.h> #include <linux/netdevice.h> #include <linux/fib_rules.h> +#include <linux/refcount.h> #include <net/flow.h> #include <net/rtnetlink.h> @@ -29,7 +30,7 @@ struct fib_rule { struct fib_rule __rcu *ctarget; struct net *fr_net; - atomic_t refcnt; + refcount_t refcnt; u32 pref; int suppress_ifgroup; int suppress_prefixlen; @@ -103,12 +104,12 @@ struct fib_rules_ops { static inline void fib_rule_get(struct fib_rule *rule) { - atomic_inc(&rule->refcnt); + refcount_inc(&rule->refcnt); } static inline void fib_rule_put(struct fib_rule *rule) { - if (atomic_dec_and_test(&rule->refcnt)) + if (refcount_dec_and_test(&rule->refcnt)) kfree_rcu(rule, rcu); } |