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linux-kernelorg-stable/include/net
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Jason A. Donenfeld 20ae1d6aa1 wireguard: device: reset peer src endpoint when netns exits 
Each peer's endpoint contains a dst_cache entry that takes a reference
to another netdev. When the containing namespace exits, we take down the
socket and prevent future sockets from being created (by setting
creating_net to NULL), which removes that potential reference on the
netns. However, it doesn't release references to the netns that a netdev
cached in dst_cache might be taking, so the netns still might fail to
exit. Since the socket is gimped anyway, we can simply clear all the
dst_caches (by way of clearing the endpoint src), which will release all
references.

However, the current dst_cache_reset function only releases those
references lazily. But it turns out that all of our usages of
wg_socket_clear_peer_endpoint_src are called from contexts that are not
exactly high-speed or bottle-necked. For example, when there's
connection difficulty, or when userspace is reconfiguring the interface.
And in particular for this patch, when the netns is exiting. So for
those cases, it makes more sense to call dst_release immediately. For
that, we add a small helper function to dst_cache.

This patch also adds a test to netns.sh from Hangbin Liu to ensure this
doesn't regress.

Tested-by: Hangbin Liu <liuhangbin@gmail.com>
Reported-by: Xiumei Mu <xmu@redhat.com>
Cc: Toke Høiland-Jørgensen <toke@redhat.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Fixes: 900575aa33 ("wireguard: device: avoid circular netns references")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 		2021-11-29 19:50:45 -08:00
..
9p 9p: fix a bunch of checkpatch warnings 2021-11-04 21:04:25 +09:00
bluetooth Bluetooth: Rename driver .prevent_wake to .wakeup 2021-10-01 15:46:15 -07:00
caif net: remove the caif_hsi driver 2021-07-01 13:19:48 -07:00
iucv
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netfilter netfilter: nft_payload: support for inner header matching / mangling 2021-11-01 09:31:03 +01:00
netns netfilter: conntrack: fix boot failure with nf_conntrack.enable_hooks=1 2021-09-28 13:04:55 +02:00
nfc NFC: add NCI_UNREG flag to eliminate the race 2021-11-17 20:17:05 -08:00
phonet
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sctp security: pass asoc to sctp_assoc_request and sctp_sk_clone 2021-11-03 11:09:20 +00:00
tc_act
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6lowpan.h
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Space.h wan: remove sbni/granch driver 2021-08-03 13:05:26 +01:00
act_api.h net: sched: Merge Qdisc::bstats and Qdisc::cpu_bstats data types 2021-10-18 12:54:41 +01:00
addrconf.h
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af_ieee802154.h
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af_rxrpc.h
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af_unix.h af_unix: Add unix_stream_proto for sockmap 2021-08-16 18:43:39 -07:00
af_vsock.h
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ah.h
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amt.h amt: add mld report message handler 2021-11-01 13:36:09 +00:00
arp.h
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atmclip.h
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ax25.h ax25: constify dev_addr passing 2021-10-13 09:40:45 -07:00
ax88796.h ax88796: export ax_NS8390_init() hook 2021-08-03 13:05:25 +01:00
bareudp.h
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bond_3ad.h bonding: add new option lacp_active 2021-08-03 11:50:22 +01:00
bond_alb.h
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bond_options.h bonding: add new option lacp_active 2021-08-03 11:50:22 +01:00
bonding.h bonding: remove extraneous definitions from bonding.h 2021-08-11 14:57:31 -07:00
bpf_sk_storage.h
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busy_poll.h net: avoid dirtying sk->sk_napi_id 2021-10-25 18:02:12 -07:00
calipso.h
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cfg80211-wext.h
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cfg80211.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-10-28 10:43:58 -07:00
cfg802154.h
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checksum.h
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cipso_ipv4.h
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cls_cgroup.h
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codel.h fq_codel: generalise ce_threshold marking for subset of traffic 2021-10-20 15:24:36 -07:00
codel_impl.h fq_codel: generalise ce_threshold marking for subset of traffic 2021-10-20 15:24:36 -07:00
codel_qdisc.h
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compat.h net/ipv4/ipv6: Replace one-element arraya with flexible-array members 2021-08-05 11:46:42 +01:00
datalink.h llc/snap: constify dev_addr passing 2021-10-13 09:40:46 -07:00
dcbevent.h
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dcbnl.h
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devlink.h ethtool: don't drop the rtnl_lock half way thru the ioctl 2021-11-01 13:26:07 +00:00
dn.h decnet: constify dev_addr passing 2021-10-13 09:40:46 -07:00
dn_dev.h
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dn_fib.h net: convert fib_treeref from int to refcount_t 2021-07-30 15:33:24 +02:00
dn_neigh.h
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dn_nsp.h
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dn_route.h
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dsa.h net: dsa: populate supported_interfaces member 2021-11-01 13:06:32 +00:00
dsfield.h
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dst.h sk_buff: track dst status in slow_gro 2021-07-29 12:18:11 +01:00
dst_cache.h wireguard: device: reset peer src endpoint when netns exits 2021-11-29 19:50:45 -08:00
dst_metadata.h net: validate lwtstate->data before returning from skb_tunnel_info() 2021-07-09 13:55:53 -07:00
dst_ops.h
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erspan.h
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esp.h
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espintcp.h
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ethoc.h
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failover.h
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fib_notifier.h
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fib_rules.h ipv6: fix memory leak in fib6_rule_suppress 2021-11-29 14:43:35 +00:00
firewire.h
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flow.h flow: fix object-size-mismatch warning in flowi{4,6}_to_flowi_common() 2021-09-02 11:44:19 +01:00
flow_dissector.h cls_flower: Fix inability to match GRE/IPIP packets 2021-10-29 14:03:22 +01:00
flow_offload.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-08-19 18:09:18 -07:00
fou.h
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fq.h
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fq_impl.h
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garp.h
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gen_stats.h net: sched: Remove Qdisc::running sequence counter 2021-10-18 12:54:41 +01:00
genetlink.h
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geneve.h
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gre.h
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gro.h
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gro_cells.h
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gtp.h
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gue.h
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hwbm.h
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icmp.h ipv6: ICMPV6: add response to ICMPV6 RFC 8335 PROBE messages 2021-06-28 14:29:45 -07:00
ieee80211_radiotap.h mac80211: Use flex-array for radiotap header bitmap 2021-08-13 09:58:25 +02:00
ieee802154_netdev.h
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if_inet6.h ipv6: add IFLA_INET6_RA_MTU to expose mtu value 2021-08-27 17:29:18 -07:00
ife.h
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ila.h
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inet6_connection_sock.h
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inet6_hashtables.h
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inet_common.h
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inet_connection_sock.h tcp: switch orphan_count to bare per-cpu counters 2021-10-15 11:28:34 +01:00
inet_ecn.h net: add skb_get_dsfield() helper 2021-10-15 11:33:08 +01:00
inet_frag.h
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inet_hashtables.h tcp: seq_file: Replace listening_hash with lhash2 2021-07-23 16:44:57 -07:00
inet_sock.h tcp: move inet->rx_dst_ifindex to sk->sk_rx_dst_ifindex 2021-10-25 18:02:12 -07:00
inet_timewait_sock.h
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inetpeer.h
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ioam6.h ipv6: ioam: Distinguish input and output for hop-limit 2021-10-04 12:53:35 +01:00
ip.h ipv4: guard IP_MINTTL with a static key 2021-10-25 18:02:14 -07:00
ip6_checksum.h
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ip6_fib.h net: ipv6: add fib6_nh_release_dsts stub 2021-11-22 15:44:49 +00:00
ip6_route.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-08-05 15:08:47 -07:00
ip6_tunnel.h
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ip_fib.h net: ipv4: Fix rtnexthop len when RTA_FLOW is present 2021-09-24 14:07:10 +01:00
ip_tunnels.h ip_tunnel: use ndo_siocdevprivate 2021-07-27 20:11:44 +01:00
ip_vs.h ipvs: add sysctl_run_estimation to support disable estimation 2021-10-07 19:52:58 +02:00
ipcomp.h
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ipconfig.h
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ipv6.h ipv6: guard IPV6_MINHOPCOUNT with a static key 2021-10-25 18:02:13 -07:00
ipv6_frag.h
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ipv6_stubs.h net: ipv6: add fib6_nh_release_dsts stub 2021-11-22 15:44:49 +00:00
iw_handler.h
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kcm.h
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l3mdev.h
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lag.h
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lapb.h
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lib80211.h
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llc.h llc: fix out-of-bound array index in llc_sk_dev_hash() 2021-11-07 19:25:29 +00:00
llc_c_ac.h
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llc_c_ev.h
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llc_c_st.h
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llc_conn.h
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llc_if.h llc/snap: constify dev_addr passing 2021-10-13 09:40:46 -07:00
llc_pdu.h net: llc: fix skb_over_panic 2021-07-27 13:05:56 +01:00
llc_s_ac.h
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llc_s_ev.h
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llc_s_st.h
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llc_sap.h
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lwtunnel.h netfilter: add netfilter hooks to SRv6 data plane 2021-08-30 01:51:36 +02:00
mac80211.h Quite a few changes: 2021-10-22 10:20:56 -07:00
mac802154.h
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macsec.h net: macsec: fix the length used to copy the key for offloading 2021-06-24 12:41:12 -07:00
mctp.h mctp: Pass flow data & flow release events to drivers 2021-10-29 13:23:51 +01:00
mctpdevice.h mctp: Pass flow data & flow release events to drivers 2021-10-29 13:23:51 +01:00
mip6.h
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mld.h
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mpls.h
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mpls_iptunnel.h
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mptcp.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-10-28 10:43:58 -07:00
mrp.h
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ncsi.h
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ndisc.h ipv6: constify dev_addr passing 2021-10-13 09:40:46 -07:00
neighbour.h net: annotate data-race in neigh_output() 2021-10-26 13:44:18 +01:00
net_failover.h
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net_namespace.h netfilter: remove xt pernet data 2021-08-01 12:00:51 +02:00
net_ratelimit.h
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netevent.h
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netlabel.h
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netlink.h net: netlink: add the case when nlh is NULL 2021-07-27 11:43:50 +01:00
netprio_cgroup.h
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netrom.h
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nexthop.h net: ipv4: Fix rtnexthop len when RTA_FLOW is present 2021-09-24 14:07:10 +01:00
nl802154.h net: ieee802154: handle iftypes as u32 2021-11-16 18:02:46 +01:00
nsh.h
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p8022.h
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page_pool.h page_pool: Revert "page_pool: disable dma mapping support..." 2021-11-18 11:29:40 +00:00
pie.h
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ping.h
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pkt_cls.h net: sch_tbf: Add a graft command 2021-10-19 12:24:51 +01:00
pkt_sched.h net: prevent user from passing illegal stab size 2021-09-26 11:09:07 +01:00
pptp.h
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protocol.h
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psample.h psample: Add a fwd declaration for skbuff 2021-08-09 15:34:21 -07:00
psnap.h
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raw.h
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rawv6.h
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red.h
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regulatory.h
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request_sock.h
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rose.h rose: constify dev_addr passing 2021-10-13 09:40:45 -07:00
route.h
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rpl.h
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rsi_91x.h
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rtnetlink.h net: add extack arg for link ops 2021-08-04 10:01:26 +01:00
rtnh.h
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sch_generic.h net: sch: eliminate unnecessary RCU waits in mini_qdisc_pair_swap() 2021-10-27 17:09:26 -07:00
scm.h
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secure_seq.h
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seg6.h
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seg6_hmac.h
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seg6_local.h
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selftests.h
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slhc_vj.h
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smc.h
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snmp.h
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sock.h tcp: fix page frag corruption on page fault 2021-11-29 12:13:51 +00:00
sock_reuseport.h
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stp.h
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strparser.h bpf, sockmap: sk_skb data_end access incorrect when src_reg = dst_reg 2021-11-09 01:05:34 +01:00
switchdev.h net: switchdev: merge switchdev_handle_fdb_{add,del}_to_device 2021-10-27 14:54:02 +01:00
tcp.h net: avoid double accounting for pure zerocopy skbs 2021-11-03 11:19:49 +00:00
tcp_states.h
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timewait_sock.h
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tipc.h
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tls.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-10-28 10:43:58 -07:00
tls_toe.h
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transp_v6.h
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tso.h
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tun_proto.h
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udp.h net: multicast: calculate csum of looped-back and forwarded packets 2021-10-26 13:09:22 +01:00
udp_tunnel.h
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udplite.h
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vsock_addr.h
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vxlan.h
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wext.h
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x25.h
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x25device.h
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xdp.h bpf, xdp, docs: Correct some English grammar and spelling 2021-09-30 23:23:49 +02:00
xdp_priv.h
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xdp_sock.h xdp: Add proper __rcu annotations to redirect map entries 2021-06-24 19:41:15 +02:00
xdp_sock_drv.h xsk: Batched buffer allocation for the pool 2021-09-28 00:18:34 +02:00
xfrm.h xfrm: Add possibility to set the default to block if we have no policy 2021-07-21 09:49:19 +02:00
xsk_buff_pool.h xsk: Optimize for aligned case 2021-09-28 00:18:35 +02:00