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net: bareudp: add missing error handling for bareudp_link_config()
[ Upstream commit94bcfdbff0
] .dellink does not get called after .newlink fails, bareudp_newlink() must undo what bareudp_configure() has done if bareudp_link_config() fails. v2: call bareudp_dellink(), like bareudp_dev_create() does Fixes:571912c69f
("net: UDP tunnel encapsulation module for tunnelling different protocols like MPLS, IP, NSH etc.") Link: https://lore.kernel.org/r/20210105190725.1736246-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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parent
2a432be9ba
commit
210b9cdb3d
1 changed files with 14 additions and 8 deletions
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@ -645,11 +645,20 @@ static int bareudp_link_config(struct net_device *dev,
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return 0;
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}
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static void bareudp_dellink(struct net_device *dev, struct list_head *head)
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{
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struct bareudp_dev *bareudp = netdev_priv(dev);
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list_del(&bareudp->next);
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unregister_netdevice_queue(dev, head);
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}
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static int bareudp_newlink(struct net *net, struct net_device *dev,
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struct nlattr *tb[], struct nlattr *data[],
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struct netlink_ext_ack *extack)
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{
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struct bareudp_conf conf;
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LIST_HEAD(list_kill);
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int err;
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err = bareudp2info(data, &conf, extack);
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@ -662,17 +671,14 @@ static int bareudp_newlink(struct net *net, struct net_device *dev,
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err = bareudp_link_config(dev, tb);
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if (err)
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return err;
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goto err_unconfig;
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return 0;
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}
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static void bareudp_dellink(struct net_device *dev, struct list_head *head)
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{
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struct bareudp_dev *bareudp = netdev_priv(dev);
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list_del(&bareudp->next);
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unregister_netdevice_queue(dev, head);
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err_unconfig:
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bareudp_dellink(dev, &list_kill);
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unregister_netdevice_many(&list_kill);
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return err;
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}
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static size_t bareudp_get_size(const struct net_device *dev)
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