AuxXxilium/linux_dsm_epyc7002
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[X25]: Fix for broken x25 module.

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When a user-space server application calls bind on a socket, then in kernel
space this bound socket is considered 'x25-linked' and the SOCK_ZAPPED flag
is unset.(As in x25_bind()/af_x25.c).

Now when a user-space client application attempts to connect to the server
on the listening socket, if the kernel accepts this in-coming call, then it
returns a new socket to userland and attempts to reply to the caller.

The reply/x25_sendmsg() will fail, because the new socket created on
call-accept has its SOCK_ZAPPED flag set by x25_make_new().
(sock_init_data() called by x25_alloc_socket() called by x25_make_new()
sets the flag to SOCK_ZAPPED)).

Fix: Using the sock_copy_flag() routine available in sock.h fixes this.

Tested on 32 and 64 bit kernels with x25 over tcp.

Signed-off-by: Shaun Pereira <pereira.shaun@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shaun Pereira 2006-01-06 13:11:35 -08:00 committed by David S. Miller
parent 4bad4dc919
commit a20a855479
1 changed files with 1 additions and 6 deletions
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7
net/x25/af_x25.c
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@ -540,12 +540,7 @@ static struct sock *x25_make_new(struct sock *osk)
sk->sk_state = TCP_ESTABLISHED;
sk->sk_sleep = osk->sk_sleep;
sk->sk_backlog_rcv = osk->sk_backlog_rcv;
if (sock_flag(osk, SOCK_ZAPPED))
sock_set_flag(sk, SOCK_ZAPPED);
if (sock_flag(osk, SOCK_DBG))
sock_set_flag(sk, SOCK_DBG);
sock_copy_flags(sk, osk);
ox25 = x25_sk(osk);
x25->t21 = ox25->t21;