From: Tom Parkin <tparkin@katalix.com>
Date: Mon, 29 Oct 2012 23:41:48 +0000 (+0000)
Subject: l2tp: fix oops in l2tp_eth_create() error path
X-Git-Tag: v3.2.34~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=20f2d6825ac85669edc96717f584a7194c4f3af6;p=pandora-kernel.git

l2tp: fix oops in l2tp_eth_create() error path

[ Upstream commit 789336360e0a2aeb9750c16ab704a02cbe035e9e ]

When creating an L2TPv3 Ethernet session, if register_netdev() should fail for
any reason (for example, automatic naming for "l2tpeth%d" interfaces hits the
32k-interface limit), the netdev is freed in the error path.  However, the
l2tp_eth_sess structure's dev pointer is left uncleared, and this results in
l2tp_eth_delete() then attempting to unregister the same netdev later in the
session teardown.  This results in an oops.

To avoid this, clear the session dev pointer in the error path.

Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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