This is a note to let you know that I've just added the patch titled
net/l2tp: don't fall back on UDP [get|set]sockopt
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-l2tp-don-t-fall-back-on-udp-sockopt.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3cf521f7dc87c031617fd47e4b7aa2593c2f3daf Mon Sep 17 00:00:00 2001
From: Sasha Levin <sasha.levin@xxxxxxxxxx>
Date: Mon, 14 Jul 2014 17:02:31 -0700
Subject: net/l2tp: don't fall back on UDP [get|set]sockopt
From: Sasha Levin <sasha.levin@xxxxxxxxxx>
commit 3cf521f7dc87c031617fd47e4b7aa2593c2f3daf upstream.
The l2tp [get|set]sockopt() code has fallen back to the UDP functions
for socket option levels != SOL_PPPOL2TP since day one, but that has
never actually worked, since the l2tp socket isn't an inet socket.
As David Miller points out:
"If we wanted this to work, it'd have to look up the tunnel and then
use tunnel->sk, but I wonder how useful that would be"
Since this can never have worked so nobody could possibly have depended
on that functionality, just remove the broken code and return -EINVAL.
Reported-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
Acked-by: James Chapman <jchapman@xxxxxxxxxxx>
Acked-by: David Miller <davem@xxxxxxxxxxxxx>
Cc: Phil Turnbull <phil.turnbull@xxxxxxxxxx>
Cc: Vegard Nossum <vegard.nossum@xxxxxxxxxx>
Cc: Willy Tarreau <w@xxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/l2tp/l2tp_ppp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -1351,7 +1351,7 @@ static int pppol2tp_setsockopt(struct so
int err;
if (level != SOL_PPPOL2TP)
- return udp_prot.setsockopt(sk, level, optname, optval, optlen);
+ return -EINVAL;
if (optlen < sizeof(int))
return -EINVAL;
@@ -1477,7 +1477,7 @@ static int pppol2tp_getsockopt(struct so
struct pppol2tp_session *ps;
if (level != SOL_PPPOL2TP)
- return udp_prot.getsockopt(sk, level, optname, optval, optlen);
+ return -EINVAL;
if (get_user(len, (int __user *) optlen))
return -EFAULT;
Patches currently in stable-queue which might be from sasha.levin@xxxxxxxxxx are
queue-3.4/net-l2tp-don-t-fall-back-on-udp-sockopt.patch
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