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David Ahern d17d47da59 neighbour: allow NUD_NOARP entries to be forced GCed 
commit 7a6b1ab7475fd6478eeaf5c9d1163e7a18125c8f upstream.

IFF_POINTOPOINT interfaces use NUD_NOARP entries for IPv6. It's possible to
fill up the neighbour table with enough entries that it will overflow for
valid connections after that.

This behaviour is more prevalent after commit 58956317c8de ("neighbor:
Improve garbage collection") is applied, as it prevents removal from
entries that are not NUD_FAILED, unless they are more than 5s old.

Fixes: 58956317c8de (neighbor: Improve garbage collection)
Reported-by: Kasper Dupont <kasperd@gjkwv.06.feb.2021.kasperd.net>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-10 13:39:29 +02:00
..
bpf_sk_storage.c
bpf: Change bpf_sk_storage_*() to accept ARG_PTR_TO_BTF_ID_SOCK_COMMON
2020-09-25 13:58:01 -07:00
datagram.c
udp: fix skb_copy_and_csum_datagram with odd segment sizes
2021-02-17 11:02:28 +01:00
datagram.h
…
dev_addr_lists.c
net: core: add nested_level variable in net_device
2020-09-28 15:00:15 -07:00
dev_ioctl.c
net: fix dev_ifsioc_locked() race condition
2021-03-07 12:34:07 +01:00
dev.c
net: sched: fix tx action reschedule issue with stopped queue
2021-06-03 09:00:47 +02:00
devlink.c
devlink: Correct VIRTUAL port to not have phys_port attributes
2021-06-10 13:39:16 +02:00
drop_monitor.c
drop_monitor: Perform cleanup upon probe registration failure
2021-03-30 14:31:57 +02:00
dst_cache.c
…
dst.c
net, bpf: Fix ip6ip6 crash with collect_md populated skbs
2021-03-30 14:32:05 +02:00
failover.c
…
fib_notifier.c
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
fib_rules.c
fib: fix fib_rule_ops indirect call wrappers when CONFIG_IPV6=m
2020-09-08 20:09:08 -07:00
filter.c
bpf: Set mac_len in bpf_skb_change_head
2021-06-03 09:00:49 +02:00
flow_dissector.c
flow_dissector: Fix out-of-bounds warning in __skb_flow_bpf_to_target()
2021-05-19 10:12:57 +02:00
flow_offload.c
net: flow_offload: Fix memory leak for indirect flow block
2020-12-09 16:08:33 -08:00
gen_estimator.c
net_sched: gen_estimator: support large ewma log
2021-01-27 11:55:23 +01:00
gen_stats.c
docs: networking: convert gen_stats.txt to ReST
2020-04-28 14:39:46 -07:00
gro_cells.c
gro_cells: reduce number of synchronize_net() calls
2020-11-25 11:28:12 -08:00
hwbm.c
…
link_watch.c
net: Add IF_OPER_TESTING
2020-04-20 12:43:24 -07:00
lwt_bpf.c
lwt_bpf: Replace preempt_disable() with migrate_disable()
2020-12-07 11:53:40 -08:00
lwtunnel.c
net: ipv6: add rpl sr tunnel
2020-03-29 22:30:57 -07:00
Makefile
ethtool: move to its own directory
2019-12-12 17:07:05 -08:00
neighbour.c
neighbour: allow NUD_NOARP entries to be forced GCed
2021-06-10 13:39:29 +02:00
net_namespace.c
bpf, net: Rework cookie generator as per-cpu one
2020-09-30 11:50:35 -07:00
net-procfs.c
net-sysfs: add backlog len and CPU id to softnet data
2020-09-21 13:56:37 -07:00
net-sysfs.c
net-sysfs: take the rtnl lock when accessing xps_rxqs_map and num_tc
2021-01-12 20:18:11 +01:00
net-sysfs.h
net-sysfs: add netdev_change_owner()
2020-02-26 20:07:25 -08:00
net-traces.c
…
netclassid_cgroup.c
cgroup, netclassid: remove double cond_resched
2020-04-21 15:44:30 -07:00
netevent.c
…
netpoll.c
net: Have netpoll bring-up DSA management interface
2020-11-18 11:04:11 -08:00
netprio_cgroup.c
netprio_cgroup: Fix unlimited memory leak of v2 cgroups
2020-05-09 20:59:21 -07:00
page_pool.c
mm: fix struct page layout on 32-bit systems
2021-05-19 10:13:17 +02:00
pktgen.c
pktgen: fix misuse of BUG_ON() in pktgen_thread_worker()
2021-03-07 12:34:09 +01:00
ptp_classifier.c
ptp: Add generic ptp v2 header parsing function
2020-08-19 16:07:49 -07:00
request_sock.c
tcp: add rcu protection around tp->fastopen_rsk
2019-10-13 10:13:08 -07:00
rtnetlink.c
net: fix dev_ifsioc_locked() race condition
2021-03-07 12:34:07 +01:00
scm.c
fs: Add receive_fd() wrapper for __receive_fd()
2020-07-13 11:03:44 -07:00
secure_seq.c
crypto: lib/sha1 - remove unnecessary includes of linux/cryptohash.h
2020-05-08 15:32:17 +10:00
skbuff.c
net: fix up truesize of cloned skb in skb_prepare_for_shift()
2021-03-07 12:34:05 +01:00
skmsg.c
bpf, sockmap: Fix incorrect fwd_alloc accounting
2021-04-14 08:42:01 +02:00
sock_diag.c
bpf, net: Rework cookie generator as per-cpu one
2020-09-30 11:50:35 -07:00
sock_map.c
net, sockmap: Don't call bpf_prog_put() on NULL pointer
2020-10-15 21:05:23 +02:00
sock_reuseport.c
udp: Prevent reuseport_select_sock from reading uninitialized socks
2021-01-23 16:03:59 +01:00
sock.c
net: sock: fix in-kernel mark setting
2021-06-10 13:39:17 +02:00
stream.c
…
sysctl_net_core.c
net: add option to not create fall-back tunnels in root-ns as well
2020-08-28 06:52:44 -07:00
timestamping.c
net: Introduce a new MII time stamping interface.
2019-12-25 19:51:33 -08:00
tso.c
net: tso: add UDP segmentation support
2020-06-18 20:46:23 -07:00
utils.c
net: Fix skb->csum update in inet_proto_csum_replace16().
2020-01-24 20:54:30 +01:00
xdp.c
xdp: fix xdp_return_frame() kernel BUG throw for page_pool memory model
2021-04-14 08:42:09 +02:00