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Re: Fw: Nasty Oops in 2.6.0-test6 bind/SO_REUSEADDR

To: "David S. Miller" <davem@xxxxxxxxxx>
Subject: Re: Fw: Nasty Oops in 2.6.0-test6 bind/SO_REUSEADDR
From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxxxxx>
Date: Thu, 9 Oct 2003 23:36:44 -0300
Cc: netdev@xxxxxxxxxxx, Dan Merillat <dmerillat@xxxxxxxxxxx>
In-reply-to: <20031008133345.49f71991.davem@xxxxxxxxxx>
Organization: Conectiva S.A.
References: <20031008133345.49f71991.davem@xxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
User-agent: Mutt/1.5.4i
Em Wed, Oct 08, 2003 at 01:33:45PM -0700, David S. Miller escreveu:
> Arnaldo, I think this is another piece of fallout
> from the struct sock splitup you did ages ago.
> 
> I think it's dereferencing inet_sk(sk) for a time-wait
> socket, so we probably need a TCP_TIME_WAIT test plus
> some additional logic here?  Better check tcp_ipv6.c too.

Dan, could you please try with this patch?

- Arnaldo


===== net/ipv4/tcp_ipv4.c 1.69 vs edited =====
--- 1.69/net/ipv4/tcp_ipv4.c    Wed Oct  8 12:27:40 2003
+++ edited/net/ipv4/tcp_ipv4.c  Thu Oct  9 23:23:38 2003
@@ -186,7 +186,8 @@
        int reuse = sk->sk_reuse;
 
        sk_for_each_bound(sk2, node, &tb->owners) {
-               if (sk != sk2 &&
+               if (likely(sk->sk_state != TCP_TIME_WAIT) &&
+                   sk != sk2 &&
                    !ipv6_only_sock(sk2) &&
                    (!sk->sk_bound_dev_if ||
                     !sk2->sk_bound_dev_if ||
===== net/ipv6/tcp_ipv6.c 1.74 vs edited =====
--- 1.74/net/ipv6/tcp_ipv6.c    Wed Oct  8 12:27:40 2003
+++ edited/net/ipv6/tcp_ipv6.c  Thu Oct  9 23:23:45 2003
@@ -101,7 +101,8 @@
 
        /* We must walk the whole port owner list in this case. -DaveM */
        sk_for_each_bound(sk2, node, &tb->owners) {
-               if (sk != sk2 &&
+               if (likely(sk->sk_state != TCP_TIME_WAIT) &&
+                   sk != sk2 &&
                    (!sk->sk_bound_dev_if ||
                     !sk2->sk_bound_dev_if ||
                     sk->sk_bound_dev_if == sk2->sk_bound_dev_if) &&

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