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af_iucv: release reference to HS device 

For HiperSockets transport skbs sent are bound to one of the
available HiperSockets devices. Add missing release of reference to
a HiperSockets device before freeing an skb.

Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun 2011-12-19 22:56:29 +00:00 committed by David S. Miller
parent 42bd48e014
commit 816abbadf9
1 changed files with 24 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
net/iucv/af_iucv.c
View File

@ -130,6 +130,17 @@ static inline void low_nmcpy(unsigned char *dst, char *src)
memcpy(&dst[8], src, 8);
}
static void iucv_skb_queue_purge(struct sk_buff_head *list)
{
struct sk_buff *skb;
while ((skb = skb_dequeue(list)) != NULL) {
if (skb->dev)
dev_put(skb->dev);
kfree_skb(skb);
}
}
static int afiucv_pm_prepare(struct device *dev)
{
#ifdef CONFIG_PM_DEBUG
@ -164,7 +175,7 @@ static int afiucv_pm_freeze(struct device *dev)
read_lock(&iucv_sk_list.lock);
sk_for_each(sk, node, &iucv_sk_list.head) {
iucv = iucv_sk(sk);
skb_queue_purge(&iucv->send_skb_q);
iucv_skb_queue_purge(&iucv->send_skb_q);
skb_queue_purge(&iucv->backlog_skb_q);
switch (sk->sk_state) {
case IUCV_SEVERED:
@ -366,9 +377,7 @@ static int afiucv_hs_send(struct iucv_message *imsg, struct sock *sock,
if (imsg)
memcpy(&phs_hdr->iucv_hdr, imsg, sizeof(struct iucv_message));
rcu_read_lock();
skb->dev = dev_get_by_index_rcu(net, sock->sk_bound_dev_if);
rcu_read_unlock();
skb->dev = dev_get_by_index(net, sock->sk_bound_dev_if);
if (!skb->dev)
return -ENODEV;
if (!(skb->dev->flags & IFF_UP))
@ -388,6 +397,7 @@ static int afiucv_hs_send(struct iucv_message *imsg, struct sock *sock,
err = dev_queue_xmit(skb);
if (err) {
skb_unlink(nskb, &iucv->send_skb_q);
dev_put(nskb->dev);
kfree_skb(nskb);
} else {
atomic_sub(confirm_recv, &iucv->msg_recv);
@ -481,16 +491,14 @@ static void iucv_sock_close(struct sock *sk)
blen = sizeof(struct af_iucv_trans_hdr) + ETH_HLEN;
skb = sock_alloc_send_skb(sk, blen, 1, &err);
if (skb) {
skb_reserve(skb,
sizeof(struct af_iucv_trans_hdr) +
ETH_HLEN);
skb_reserve(skb, blen);
err = afiucv_hs_send(NULL, sk, skb,
AF_IUCV_FLAG_FIN);
}
sk->sk_state = IUCV_DISCONN;
sk->sk_state_change(sk);
}
case IUCV_DISCONN:
case IUCV_DISCONN: /* fall through */
sk->sk_state = IUCV_CLOSING;
sk->sk_state_change(sk);
@ -520,7 +528,7 @@ static void iucv_sock_close(struct sock *sk)
sk->sk_err = ECONNRESET;
sk->sk_state_change(sk);
skb_queue_purge(&iucv->send_skb_q);
iucv_skb_queue_purge(&iucv->send_skb_q);
skb_queue_purge(&iucv->backlog_skb_q);
break;
@ -739,7 +747,7 @@ static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr,
if (!memcmp(dev->perm_addr, uid, 8)) {
memcpy(iucv->src_name, sa->siucv_name, 8);
memcpy(iucv->src_user_id, sa->siucv_user_id, 8);
sock->sk->sk_bound_dev_if = dev->ifindex;
sk->sk_bound_dev_if = dev->ifindex;
sk->sk_state = IUCV_BOUND;
iucv->transport = AF_IUCV_TRANS_HIPER;
if (!iucv->msglimit)
@ -1225,6 +1233,8 @@ release:
return len;
fail:
if (skb->dev)
dev_put(skb->dev);
kfree_skb(skb);
out:
release_sock(sk);
@ -1441,9 +1451,7 @@ static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
ETH_HLEN;
sskb = sock_alloc_send_skb(sk, blen, 1, &err);
if (sskb) {
skb_reserve(sskb,
sizeof(struct af_iucv_trans_hdr)
+ ETH_HLEN);
skb_reserve(sskb, blen);
err = afiucv_hs_send(NULL, sk, sskb,
AF_IUCV_FLAG_WIN);
}
@ -2261,6 +2269,7 @@ static void afiucv_hs_callback_txnotify(struct sk_buff *skb,
case TX_NOTIFY_OK:
__skb_unlink(this, list);
iucv_sock_wake_msglim(sk);
dev_put(this->dev);
kfree_skb(this);
break;
case TX_NOTIFY_PENDING:
@ -2271,6 +2280,7 @@ static void afiucv_hs_callback_txnotify(struct sk_buff *skb,
atomic_dec(&iucv->pendings);
if (atomic_read(&iucv->pendings) <= 0)
iucv_sock_wake_msglim(sk);
dev_put(this->dev);
kfree_skb(this);
break;
case TX_NOTIFY_UNREACHABLE:
@ -2279,6 +2289,7 @@ static void afiucv_hs_callback_txnotify(struct sk_buff *skb,
case TX_NOTIFY_GENERALERROR:
case TX_NOTIFY_DELAYED_GENERALERROR:
__skb_unlink(this, list);
dev_put(this->dev);
kfree_skb(this);
if (!list_empty(&iucv->accept_q))
sk->sk_state = IUCV_SEVERED;