diff options
| author | Eric Dumazet <edumazet@google.com> | 2016-05-04 02:10:50 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-04 22:55:11 +0200 |
| commit | 614bdd4d6e61d260d82945f5f52a5dc288f64783 (patch) | |
| tree | c60425de6b6c599cba869c57fd938080d4e56581 /net/ipv4/inet_timewait_sock.c | |
| parent | tcp: fix lockdep splat in tcp_snd_una_update() (diff) | |
| download | linux-614bdd4d6e61d260d82945f5f52a5dc288f64783.tar.xz linux-614bdd4d6e61d260d82945f5f52a5dc288f64783.zip | |
tcp: must block bh in __inet_twsk_hashdance()
__inet_twsk_hashdance() might be called from process context,
better block BH before acquiring bind hash and established locks
Fixes: c10d9310edf5 ("tcp: do not assume TCP code is non preemptible")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/inet_timewait_sock.c')
| -rw-r--r-- | net/ipv4/inet_timewait_sock.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c index 99ee5c4a9b68..206581674806 100644 --- a/net/ipv4/inet_timewait_sock.c +++ b/net/ipv4/inet_timewait_sock.c @@ -94,7 +94,7 @@ static void inet_twsk_add_bind_node(struct inet_timewait_sock *tw, } /* - * Enter the time wait state. This is called with locally disabled BH. + * Enter the time wait state. * Essentially we whip up a timewait bucket, copy the relevant info into it * from the SK, and mess with hash chains and list linkage. */ @@ -112,7 +112,7 @@ void __inet_twsk_hashdance(struct inet_timewait_sock *tw, struct sock *sk, */ bhead = &hashinfo->bhash[inet_bhashfn(twsk_net(tw), inet->inet_num, hashinfo->bhash_size)]; - spin_lock(&bhead->lock); + spin_lock_bh(&bhead->lock); tw->tw_tb = icsk->icsk_bind_hash; WARN_ON(!icsk->icsk_bind_hash); inet_twsk_add_bind_node(tw, &tw->tw_tb->owners); @@ -138,7 +138,7 @@ void __inet_twsk_hashdance(struct inet_timewait_sock *tw, struct sock *sk, if (__sk_nulls_del_node_init_rcu(sk)) sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); - spin_unlock(lock); + spin_unlock_bh(lock); } EXPORT_SYMBOL_GPL(__inet_twsk_hashdance); |