decnet: proper socket refcounting
Better use sk_reset_timer() / sk_stop_timer() helpers to make sure we
dont access already freed/reused memory later.
Reported-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Tested-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/decnet/dn_timer.c b/net/decnet/dn_timer.c
index 67f691b..d9c150c 100644
--- a/net/decnet/dn_timer.c
+++ b/net/decnet/dn_timer.c
@@ -36,16 +36,13 @@
void dn_start_slow_timer(struct sock *sk)
{
- sk->sk_timer.expires = jiffies + SLOW_INTERVAL;
- sk->sk_timer.function = dn_slow_timer;
- sk->sk_timer.data = (unsigned long)sk;
-
- add_timer(&sk->sk_timer);
+ setup_timer(&sk->sk_timer, dn_slow_timer, (unsigned long)sk);
+ sk_reset_timer(sk, &sk->sk_timer, jiffies + SLOW_INTERVAL);
}
void dn_stop_slow_timer(struct sock *sk)
{
- del_timer(&sk->sk_timer);
+ sk_stop_timer(sk, &sk->sk_timer);
}
static void dn_slow_timer(unsigned long arg)
@@ -53,12 +50,10 @@
struct sock *sk = (struct sock *)arg;
struct dn_scp *scp = DN_SK(sk);
- sock_hold(sk);
bh_lock_sock(sk);
if (sock_owned_by_user(sk)) {
- sk->sk_timer.expires = jiffies + HZ / 10;
- add_timer(&sk->sk_timer);
+ sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ / 10);
goto out;
}
@@ -100,9 +95,7 @@
scp->keepalive_fxn(sk);
}
- sk->sk_timer.expires = jiffies + SLOW_INTERVAL;
-
- add_timer(&sk->sk_timer);
+ sk_reset_timer(sk, &sk->sk_timer, jiffies + SLOW_INTERVAL);
out:
bh_unlock_sock(sk);
sock_put(sk);