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authorEric Dumazet <eric.dumazet@gmail.com>2009-12-04 03:46:54 +0000
committerDavid S. Miller <davem@davemloft.net>2009-12-08 20:17:51 -0800
commit9327f7053e3993c125944fdb137a0618319ef2a0 (patch)
tree3cee7de049a2468bef930b1832c42bd1b2e69e9a /include
parent74757d49016a8b06ca028196886641d7aeb78de5 (diff)
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tcp: Fix a connect() race with timewait sockets
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>
Diffstat (limited to 'include')
-rw-r--r--include/net/inet6_hashtables.h2
-rw-r--r--include/net/inet_hashtables.h8
2 files changed, 6 insertions, 4 deletions
diff --git a/include/net/inet6_hashtables.h b/include/net/inet6_hashtables.h
index 92838d3a1ab..e46674d5dae 100644
--- a/include/net/inet6_hashtables.h
+++ b/include/net/inet6_hashtables.h
@@ -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
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index 41cbddd25b7..74358d1b3f4 100644
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -251,7 +251,7 @@ extern void inet_put_port(struct sock *sk);
void inet_hashinfo_init(struct inet_hashinfo *h);
-extern void __inet_hash_nolisten(struct sock *sk);
+extern int __inet_hash_nolisten(struct sock *sk, struct inet_timewait_sock *tw);
extern void inet_hash(struct sock *sk);
extern void inet_unhash(struct sock *sk);
@@ -391,10 +391,12 @@ static inline struct sock *__inet_lookup_skb(struct inet_hashinfo *hashinfo,
}
extern int __inet_hash_connect(struct inet_timewait_death_row *death_row,
- struct sock *sk, u32 port_offset,
+ struct sock *sk,
+ u32 port_offset,
int (*check_established)(struct inet_timewait_death_row *,
struct sock *, __u16, struct inet_timewait_sock **),
- void (*hash)(struct sock *sk));
+ int (*hash)(struct sock *sk, struct inet_timewait_sock *twp));
+
extern int inet_hash_connect(struct inet_timewait_death_row *death_row,
struct sock *sk);
#endif /* _INET_HASHTABLES_H */