[PATCH] (10/13) ddp socket orphan

[Stephen Hemminger <shemminger@xxxxxxxx>]

This fixes the problem caused by interrupting aecho causing an oops.
What happened was that the sock was detached from the user process
but sk->sk_sleep was still so when write data was freed it would
do a wakeup on a poisoned data.  The sk_state_change code that was
there isn't necessary, because we are in middle of release so no
user process can be waiting.  sock_orphan does the right thing
and sets SOCK_DEAD.  

This is similar to what some other protocols do.  But some will
have the same sk->sk_sleep problem...  

diff -Nru a/net/appletalk/ddp.c b/net/appletalk/ddp.c
--- a/net/appletalk/ddp.c       Fri Aug 29 13:32:35 2003
+++ b/net/appletalk/ddp.c       Fri Aug 29 13:32:35 2003
@@ -998,10 +998,7 @@
        struct sock *sk = sock->sk;
 
        if (sk) {
-               if (!sock_flag(sk, SOCK_DEAD)) {
-                       sk->sk_state_change(sk);
-                       sock_set_flag(sk, SOCK_DEAD);
-               }
+               sock_orphan(sk);
                sock->sk = NULL;
                atalk_destroy_socket(sk);
        }