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| author | Nicolas Dichtel <nicolas.dichtel@6wind.com> | 2019-07-15 13:00:22 +0300 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2019-07-17 11:03:54 +0300 |
| commit | c5d1030f23002430c2a336b2b629b9d6f72b3564 (patch) | |
| tree | 18ae6bb8642ab4a1931cbeb52ea741f9955244f5 | |
| parent | e0aaa332e6a97dae57ad59cdb19e21f83c3d081c (diff) | |
| download | linux-c5d1030f23002430c2a336b2b629b9d6f72b3564.tar.xz | |
xfrm interface: fix list corruption for x-netns
dev_net(dev) is the netns of the device and xi->net is the link netns,
where the device has been linked.
changelink() must operate in the link netns to avoid a corruption of
the xfrm lists.
Note that xi->net and dev_net(xi->physdev) are always the same.
Before the patch, the xfrmi lists may be corrupted and can later trigger a
kernel panic.
Fixes: f203b76d7809 ("xfrm: Add virtual xfrm interfaces")
Reported-by: Julien Floret <julien.floret@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Tested-by: Julien Floret <julien.floret@6wind.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
| -rw-r--r-- | net/xfrm/xfrm_interface.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/net/xfrm/xfrm_interface.c b/net/xfrm/xfrm_interface.c index 68336ee00d72..53e5e47b2c55 100644 --- a/net/xfrm/xfrm_interface.c +++ b/net/xfrm/xfrm_interface.c @@ -503,7 +503,7 @@ static int xfrmi_change(struct xfrm_if *xi, const struct xfrm_if_parms *p) static int xfrmi_update(struct xfrm_if *xi, struct xfrm_if_parms *p) { - struct net *net = dev_net(xi->dev); + struct net *net = xi->net; struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id); int err; @@ -663,9 +663,9 @@ static int xfrmi_changelink(struct net_device *dev, struct nlattr *tb[], struct nlattr *data[], struct netlink_ext_ack *extack) { - struct net *net = dev_net(dev); + struct xfrm_if *xi = netdev_priv(dev); + struct net *net = xi->net; struct xfrm_if_parms p; - struct xfrm_if *xi; xfrmi_netlink_parms(data, &p); xi = xfrmi_locate(net, &p); @@ -707,7 +707,7 @@ static struct net *xfrmi_get_link_net(const struct net_device *dev) { struct xfrm_if *xi = netdev_priv(dev); - return dev_net(xi->phydev); + return xi->net; } static const struct nla_policy xfrmi_policy[IFLA_XFRM_MAX + 1] = { |