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>
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 6574215..baf05cf 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -46,7 +46,7 @@
return;
}
local_bh_disable();
- __inet6_hash(sk);
+ __inet6_hash(sk, NULL);
local_bh_enable();
}
}
@@ -644,7 +644,7 @@
newinet->inet_daddr = newinet->inet_saddr = LOOPBACK4_IPV6;
newinet->inet_rcv_saddr = LOOPBACK4_IPV6;
- __inet6_hash(newsk);
+ __inet6_hash(newsk, NULL);
__inet_inherit_port(sk, newsk);
return newsk;