l2tp: don't mask errors in pppol2tp_setsockopt()

commit 364700cf8fd54f54ad08313464105a414e3bccb7 upstream.

pppol2tp_setsockopt() unconditionally overwrites the error value
returned by pppol2tp_tunnel_setsockopt() or
pppol2tp_session_setsockopt(), thus hiding errors from userspace.

Fixes: fd558d186df2 ("l2tp: Split pppol2tp patch into separate l2tp and ppp parts")
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
index c404a6a..a49964f 100644 (file)
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -1387,8 +1387,6 @@ static int pppol2tp_setsockopt(struct socket *sock, int level, int optname,
        } else
                err = pppol2tp_session_setsockopt(sk, session, optname, val);
 
-       err = 0;
-
 end_put_sess:
        sock_put(sk);
 end: