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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-11-21 00:21:55 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-11-26 15:49:07 -0500 |
| commit | 8a6e77d5209e459a9ec5c268c39800c06cd1dc86 (patch) | |
| tree | 141421761c5ac9b398cab84b3674d30ec2fd4e00 | |
| parent | fc0b927d9a5024e138c4318fe19a590f23e3eeec (diff) | |
| download | linux-8a6e77d5209e459a9ec5c268c39800c06cd1dc86.tar.gz linux-8a6e77d5209e459a9ec5c268c39800c06cd1dc86.tar.bz2 linux-8a6e77d5209e459a9ec5c268c39800c06cd1dc86.zip | |
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>
| -rw-r--r-- | net/decnet/dn_timer.c | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/net/decnet/dn_timer.c b/net/decnet/dn_timer.c index 67f691bd4acf..d9c150cc59a9 100644 --- a/net/decnet/dn_timer.c +++ b/net/decnet/dn_timer.c @@ -36,16 +36,13 @@ static void dn_slow_timer(unsigned long arg); 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 @@ static void dn_slow_timer(unsigned long arg) 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 @@ static void dn_slow_timer(unsigned long arg) 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); |