From 0ffdaf5b41cf4435ece14d1d3e977ce69012a20d Mon Sep 17 00:00:00 2001 From: Sowmini Varadhan Date: Thu, 6 Jul 2017 08:15:07 -0700 Subject: net/sock: add WARN_ON(parent->sk) in sock_graft() sock_graft() unilaterally sets up parent->sk based on the assumption that the existing parent->sk is null. If this condition is not true, then the existing parent->sk would be leaked, so add a WARN_ON() to alert callers who may fall in this category. Signed-off-by: Sowmini Varadhan Signed-off-by: David S. Miller --- include/net/sock.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/net') diff --git a/include/net/sock.h b/include/net/sock.h index 48e4d5c38f85..8c85791fc196 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -1697,6 +1697,7 @@ static inline void sock_orphan(struct sock *sk) static inline void sock_graft(struct sock *sk, struct socket *parent) { + WARN_ON(parent->sk); write_lock_bh(&sk->sk_callback_lock); sk->sk_wq = parent->wq; parent->sk = sk; -- cgit v1.2.3-55-g7522