summaryrefslogtreecommitdiff
path: root/net
diff options
context:
space:
mode:
authorGuillaume Nault <g.nault@alphalink.fr>2013-06-12 16:07:23 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-06-27 10:34:33 -0700
commit6e092615d27d7036832c18f1c14b691c6c1cbb1d (patch)
tree4763e679445ca470e92001a1c79215c7449d0732 /net
parentb4d45a2af9c9ca5c14e00375366125e7c31d5293 (diff)
l2tp: Fix PPP header erasure and memory leak
[ 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@alphalink.fr> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/l2tp/l2tp_ppp.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
index 770b49762412..6af7be63a47f 100644
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -350,12 +350,12 @@ static int pppol2tp_sendmsg(struct kiocb *iocb, struct socket *sock, struct msgh
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);