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| author | Jakub Kicinski <kuba@kernel.org> | 2021-01-13 17:29:47 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-01-14 10:26:46 -0800 |
| commit | 47e4bb147a96f1c9b4e7691e7e994e53838bfff8 (patch) | |
| tree | 9f6f1441fd7d9f964c6019f16fd80a292c8bd035 /net/ipv6/sit.c | |
| parent | 5b55299eed78538cc4746e50ee97103a1643249c (diff) | |
| download | linux-47e4bb147a96f1c9b4e7691e7e994e53838bfff8.tar.gz linux-47e4bb147a96f1c9b4e7691e7e994e53838bfff8.tar.bz2 linux-47e4bb147a96f1c9b4e7691e7e994e53838bfff8.zip | |
net: sit: unregister_netdevice on newlink's error path
We need to unregister the netdevice if config failed.
.ndo_uninit takes care of most of the heavy lifting.
This was uncovered by recent commit c269a24ce057 ("net: make
free_netdev() more lenient with unregistering devices").
Previously the partially-initialized device would be left
in the system.
Reported-and-tested-by: syzbot+2393580080a2da190f04@syzkaller.appspotmail.com
Fixes: e2f1f072db8d ("sit: allow to configure 6rd tunnels via netlink")
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Link: https://lore.kernel.org/r/20210114012947.2515313-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv6/sit.c')
| -rw-r--r-- | net/ipv6/sit.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index 2da0ee703779..93636867aee2 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -1645,8 +1645,11 @@ static int ipip6_newlink(struct net *src_net, struct net_device *dev, } #ifdef CONFIG_IPV6_SIT_6RD - if (ipip6_netlink_6rd_parms(data, &ip6rd)) + if (ipip6_netlink_6rd_parms(data, &ip6rd)) { err = ipip6_tunnel_update_6rd(nt, &ip6rd); + if (err < 0) + unregister_netdevice_queue(dev, NULL); + } #endif return err; |