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-rw-r--r--net/netlink/af_netlink.c29
1 files changed, 15 insertions, 14 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 42d2fb94eff1..7fc6b4da4f02 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -140,6 +140,15 @@ 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);
+
+ BUG_ON(mutex_is_locked(nlk_sk(sk)->cb_mutex));
+ 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 +157,6 @@ 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 +464,10 @@ 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);
@@ -1426,9 +1427,9 @@ 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);
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