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tcp: Fix a connect() race with timewait sockets

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First patch changes __inet_hash_nolisten() and __inet6_hash()
to get a timewait parameter to be able to unhash it from ehash
at same time the new socket is inserted in hash.

This makes sure timewait socket wont be found by a concurrent
writer in __inet_check_established()

Reported-by: kapil dakhane <kdakhane@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2009-12-04 03:46:54 +00:00
committed by David S. Miller
parent 74757d4901
commit 9327f7053e
8 changed files with 35 additions and 17 deletions
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2
include/net/inet6_hashtables.h
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@ -53,7 +53,7 @@ static inline int inet6_sk_ehashfn(const struct sock *sk)
return inet6_ehashfn(net, laddr, lport, faddr, fport);
}
extern void __inet6_hash(struct sock *sk);
extern int __inet6_hash(struct sock *sk, struct inet_timewait_sock *twp);
/*
* Sockets in TCP_CLOSE state are _always_ taken out of the hash, so