[PATCH] tipc: correctly handle releasing a not fully initialized sock
From: Sasha Levin <hidden>
Date: 2015-01-13 17:47:11
Also in:
lkml
Subsystem:
networking [general], the rest, tipc network layer · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Jon Maloy, Tung Quang Nguyen
Commit "tipc: make tipc node table aware of net namespace" has added a dereference of sock->sk before making sure it's not NULL, which makes releasing a tipc socket NULL pointer dereference for sockets that are not fully initialized. Signed-off-by: Sasha Levin <redacted> --- net/tipc/socket.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 2cec496..694d436 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c@@ -472,8 +472,8 @@ static void tipc_sk_callback(struct rcu_head *head) static int tipc_release(struct socket *sock) { struct sock *sk = sock->sk; - struct net *net = sock_net(sk); - struct tipc_net *tn = net_generic(net, tipc_net_id); + struct net *net; + struct tipc_net *tn; struct tipc_sock *tsk; struct sk_buff *skb; u32 dnode, probing_state;
@@ -485,6 +485,9 @@ static int tipc_release(struct socket *sock) if (sk == NULL) return 0; + net = sock_net(sk); + tn = net_generic(net, tipc_net_id); + tsk = tipc_sk(sk); lock_sock(sk);
--
1.7.10.4