> On Sat, 2013-03-16 at 10:36 -0700, Eric Dumazet wrote:
> > On Fri, 2013-03-15 at 00:19 +0100, Eric Dumazet wrote:
> >
> > > Thanks thats really useful, we might miss to increment socket refcount
> > > in a timer setup.
> > >
> >
> > Hmm, please add following debugging patch as well
> >
> > diff --git a/include/net/sock.h b/include/net/sock.h
> > index 14f6e9d..fe7c8a6 100644
> > --- a/include/net/sock.h
> > +++ b/include/net/sock.h
> > @@ -530,7 +530,9 @@ static inline void sock_hold(struct sock *sk)
> > */
> > static inline void __sock_put(struct sock *sk)
> > {
> > - atomic_dec(&sk->sk_refcnt);
> > + int newref = atomic_dec_return(&sk->sk_refcnt);
> > +
> > + BUG_ON(newref <= 0);
> > }
> >
> > static inline bool sk_del_node_init(struct sock *sk)
> > diff --git a/net/ipv4/inet_connection_sock.c
> > b/net/ipv4/inet_connection_sock.c
> > index 786d97a..a445e15 100644
> > --- a/net/ipv4/inet_connection_sock.c
> > +++ b/net/ipv4/inet_connection_sock.c
> > @@ -739,7 +739,7 @@ void inet_csk_prepare_forced_close(struct sock *sk)
> > {
> > /* sk_clone_lock locked the socket and set refcnt to 2 */
> > bh_unlock_sock(sk);
> > - sock_put(sk);
> > + __sock_put(sk);
> >
> > /* The below has to be done to allow calling inet_csk_destroy_sock */
> > sock_set_flag(sk, SOCK_DEAD);
> > @@ -835,13 +835,13 @@ void inet_csk_listen_stop(struct sock *sk)
> > * tcp_v4_destroy_sock().
> > */
> > tcp_sk(child)->fastopen_rsk = NULL;
> > - sock_put(sk);
> > + __sock_put(sk);
> > }
> > inet_csk_destroy_sock(child);
> >
> > bh_unlock_sock(child);
> > local_bh_enable();
> > - sock_put(child);
> > + __sock_put(child);
> >
>
> Please don't include the last line : this should stay as
>
> sock_put(child);
>
thanks! Will take at least 24 hours to get the trace.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
