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authorReshetova, Elena <elena.reshetova@intel.com>2017-07-04 09:34:55 +0300
committerDavid S. Miller <davem@davemloft.net>2017-07-04 11:29:04 +0300
commit1be9246077f6bb1583f9347c599480621d63c66a (patch)
tree1c53e30fe4a14dde41e95b4d10cba6df96fd91a1 /include/net/addrconf.h
parent0aeea21ada517b99a6e95298ffc105381bcd3a52 (diff)
downloadlinux-1be9246077f6bb1583f9347c599480621d63c66a.tar.xz
net, ipv6: convert inet6_dev.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/addrconf.h')
-rw-r--r--include/net/addrconf.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index d0889cb50172..620bd9a83ba9 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -316,7 +316,7 @@ static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
rcu_read_lock();
idev = rcu_dereference(dev->ip6_ptr);
if (idev)
- atomic_inc(&idev->refcnt);
+ refcount_inc(&idev->refcnt);
rcu_read_unlock();
return idev;
}
@@ -332,18 +332,18 @@ void in6_dev_finish_destroy(struct inet6_dev *idev);
static inline void in6_dev_put(struct inet6_dev *idev)
{
- if (atomic_dec_and_test(&idev->refcnt))
+ if (refcount_dec_and_test(&idev->refcnt))
in6_dev_finish_destroy(idev);
}
static inline void __in6_dev_put(struct inet6_dev *idev)
{
- atomic_dec(&idev->refcnt);
+ refcount_dec(&idev->refcnt);
}
static inline void in6_dev_hold(struct inet6_dev *idev)
{
- atomic_inc(&idev->refcnt);
+ refcount_inc(&idev->refcnt);
}
void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);