From: Sasha Levin Date: Tue, 13 Jan 2015 17:46:41 +0000 (-0500) Subject: tipc: correctly handle releasing a not fully initialized sock X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=357c4774b5b08878d980847f496af38869e7aad0;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git tipc: correctly handle releasing a not fully initialized sock Commit f2f9800d4955 "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 Signed-off-by: David S. Miller --- diff --git a/net/tipc/socket.c b/net/tipc/socket.c index c9c34a667921..720fda6cc2e6 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -470,8 +470,8 @@ 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; @@ -483,6 +483,9 @@ 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);