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Diffstat (limited to 'net/netlink/af_netlink.c')
-rw-r--r--net/netlink/af_netlink.c34
1 files changed, 16 insertions, 18 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 42d2fb94eff1..507828d7d4ae 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -140,6 +140,14 @@ static struct hlist_head *nl_pid_hashfn(struct nl_pid_hash *hash, u32 pid)
static void netlink_sock_destruct(struct sock *sk)
{
+ struct netlink_sock *nlk = nlk_sk(sk);
+
+ if (nlk->cb) {
+ if (nlk->cb->done)
+ nlk->cb->done(nlk->cb);
+ netlink_destroy_callback(nlk->cb);
+ }
+
skb_queue_purge(&sk->sk_receive_queue);
if (!sock_flag(sk, SOCK_DEAD)) {
@@ -148,7 +156,6 @@ static void netlink_sock_destruct(struct sock *sk)
}
BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
- BUG_TRAP(!nlk_sk(sk)->cb);
BUG_TRAP(!nlk_sk(sk)->groups);
}
@@ -456,17 +463,10 @@ static int netlink_release(struct socket *sock)
sock_orphan(sk);
nlk = nlk_sk(sk);
- mutex_lock(nlk->cb_mutex);
- if (nlk->cb) {
- if (nlk->cb->done)
- nlk->cb->done(nlk->cb);
- netlink_destroy_callback(nlk->cb);
- nlk->cb = NULL;
- }
- mutex_unlock(nlk->cb_mutex);
-
- /* OK. Socket is unlinked, and, therefore,
- no new packets will arrive */
+ /*
+ * OK. Socket is unlinked, any packets that arrive now
+ * will be purged.
+ */
sock->sk = NULL;
wake_up_interruptible_all(&nlk->wait);
@@ -1245,16 +1245,14 @@ static int netlink_recvmsg(struct kiocb *kiocb, struct socket *sock,
siocb->scm = &scm;
}
siocb->scm->creds = *NETLINK_CREDS(skb);
+ if (flags & MSG_TRUNC)
+ copied = skb->len;
skb_free_datagram(sk, skb);
if (nlk->cb && atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf / 2)
netlink_dump(sk);
scm_recv(sock, msg, siocb->scm, flags);
-
- if (flags & MSG_TRUNC)
- copied = skb->len;
-
out:
netlink_rcv_wake(sk);
return err ? : copied;
@@ -1426,9 +1424,9 @@ int netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
return -ECONNREFUSED;
}
nlk = nlk_sk(sk);
- /* A dump or destruction is in progress... */
+ /* A dump is in progress... */
mutex_lock(nlk->cb_mutex);
- if (nlk->cb || sock_flag(sk, SOCK_DEAD)) {
+ if (nlk->cb) {
mutex_unlock(nlk->cb_mutex);
netlink_destroy_callback(cb);
sock_put(sk);