| From | Greg Kroah-Hartman <> | Subject | [ 024/187] net: l2tp_eth: fix kernel panic on rmmod l2tp_eth | Date | Thu, 12 Jul 2012 15:33:00 -0700 |
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From: Greg KH <gregkh@linuxfoundation.org>
3.4-stable review patch. If anyone has any objections, please let me know.
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From: Eric Dumazet <edumazet@google.com>
[ Upstream commit a06998b88b1651c5f71c0e35f528bf2057188ead ]
We must prevent module unloading if some devices are still attached to l2tp_eth driver.
Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Denys Fedoryshchenko <denys@visp.net.lb> Tested-by: Denys Fedoryshchenko <denys@visp.net.lb> Cc: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- net/l2tp/l2tp_eth.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/net/l2tp/l2tp_eth.c +++ b/net/l2tp/l2tp_eth.c @@ -167,6 +167,7 @@ static void l2tp_eth_delete(struct l2tp_ if (dev) { unregister_netdev(dev); spriv->dev = NULL; + module_put(THIS_MODULE); } } } @@ -254,6 +255,7 @@ static int l2tp_eth_create(struct net *n if (rc < 0) goto out_del_dev; + __module_get(THIS_MODULE); /* Must be done after register_netdev() */ strlcpy(session->ifname, dev->name, IFNAMSIZ);
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