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l2tp: Correctly return -EBADF from pppol2tp_getname.

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If 'tunnel' is NULL we should return -EBADF but the 'end_put_sess' path
unconditionally sets 'error' back to zero. Rework the error path so it
more closely matches pppol2tp_sendmsg.

Fixes: fd558d186d ("l2tp: Split pppol2tp patch into separate l2tp and ppp parts")
Signed-off-by: Phil Turnbull <phil.turnbull@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
phil.turnbull@oracle.com 2016-07-26 15:14:35 -04:00 committed by David S. Miller
parent 0a91605cda
commit 4ac36a4ada
1 changed files with 2 additions and 5 deletions
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7
net/l2tp/l2tp_ppp.c
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@ -866,10 +866,8 @@ static int pppol2tp_getname(struct socket *sock, struct sockaddr *uaddr,
pls = l2tp_session_priv(session);
tunnel = l2tp_sock_to_tunnel(pls->tunnel_sock);
if (tunnel == NULL) {
error = -EBADF;
if (tunnel == NULL)
goto end_put_sess;
}
inet = inet_sk(tunnel->sock);
if ((tunnel->version == 2) && (tunnel->sock->sk_family == AF_INET)) {
@ -947,12 +945,11 @@ static int pppol2tp_getname(struct socket *sock, struct sockaddr *uaddr,
}
*usockaddr_len = len;
error = 0;
sock_put(pls->tunnel_sock);
end_put_sess:
sock_put(sk);
error = 0;
end:
return error;
}