diff options
| author | Reshetova, Elena <elena.reshetova@intel.com> | 2017-06-30 13:07:58 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-01 07:39:07 -0700 |
| commit | 633547973ffc32fd2c815639d4675e1531f0896f (patch) | |
| tree | 751ca7a379366af93f578d9f35f48339d4d2dd9b /net/core/datagram.c | |
| parent | 53869cebce4bc53f71a080e7830600d4ae1ab712 (diff) | |
net: convert sk_buff.users 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 'net/core/datagram.c')
| -rw-r--r-- | net/core/datagram.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/core/datagram.c b/net/core/datagram.c index e5311a7c70da..95d43543ac91 100644 --- a/net/core/datagram.c +++ b/net/core/datagram.c @@ -188,7 +188,7 @@ struct sk_buff *__skb_try_recv_from_queue(struct sock *sk, } } *peeked = 1; - atomic_inc(&skb->users); + refcount_inc(&skb->users); } else { __skb_unlink(skb, queue); if (destructor) @@ -358,7 +358,7 @@ int __sk_queue_drop_skb(struct sock *sk, struct sk_buff_head *sk_queue, spin_lock_bh(&sk_queue->lock); if (skb == skb_peek(sk_queue)) { __skb_unlink(skb, sk_queue); - atomic_dec(&skb->users); + refcount_dec(&skb->users); if (destructor) destructor(sk, skb); err = 0; |