This is a note to let you know that I've just added the patch titled
l2tp: Fix PPP header erasure and memory leak
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:
l2tp-fix-ppp-header-erasure-and-memory-leak.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 15819f0a26ae1915e9c7b13dc57bf2bc7b5cc272 Mon Sep 17 00:00:00 2001
From: Guillaume Nault <g.nault@xxxxxxxxxxxx>
Date: Wed, 12 Jun 2013 16:07:23 +0200
Subject: l2tp: Fix PPP header erasure and memory leak
From: Guillaume Nault <g.nault@xxxxxxxxxxxx>
[ Upstream commit 55b92b7a11690bc377b5d373872a6b650ae88e64 ]
Copy user data after PPP framing header. This prevents erasure of the
added PPP header and avoids leaking two bytes of uninitialised memory
at the end of skb's data buffer.
Signed-off-by: Guillaume Nault <g.nault@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
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
@@ -350,12 +350,12 @@ static int pppol2tp_sendmsg(struct kiocb
skb_put(skb, 2);
/* Copy user data into skb */
- error = memcpy_fromiovec(skb->data, m->msg_iov, total_len);
+ error = memcpy_fromiovec(skb_put(skb, total_len), m->msg_iov,
+ total_len);
if (error < 0) {
kfree_skb(skb);
goto error_put_sess_tun;
}
- skb_put(skb, total_len);
l2tp_xmit_skb(session, skb, session->hdr_len);
Patches currently in stable-queue which might be from g.nault@xxxxxxxxxxxx are
queue-3.4/l2tp-fix-sendmsg-return-value.patch
queue-3.4/l2tp-fix-ppp-header-erasure-and-memory-leak.patch
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