Ido Schimmel
73dd98ac19
ipv4: Invalidate neighbour for broadcast address upon address addition ...
[ Upstream commit 0c51e12e218f20b7d976158fdc18019627326f7a ]
In case user space sends a packet destined to a broadcast address when a
matching broadcast route is not configured, the kernel will create a
unicast neighbour entry that will never be resolved [1].
When the broadcast route is configured, the unicast neighbour entry will
not be invalidated and continue to linger, resulting in packets being
dropped.
Solve this by invalidating unresolved neighbour entries for broadcast
addresses after routes for these addresses are internally configured by
the kernel. This allows the kernel to create a broadcast neighbour entry
following the next route lookup.
Another possible solution that is more generic but also more complex is
to have the ARP code register a listener to the FIB notification chain
and invalidate matching neighbour entries upon the addition of broadcast
routes.
It is also possible to wave off the issue as a user space problem, but
it seems a bit excessive to expect user space to be that intimately
familiar with the inner workings of the FIB/neighbour kernel code.
[1] https://lore.kernel.org/netdev/55a04a8f-56f3-f73c-2aea-2195923f09d1@huawei.com/
Reported-by: Wang Hai <wanghai38@huawei.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Tested-by: Wang Hai <wanghai38@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-04-15 14:18:33 +02:00
Bluetooth: defer cleanup of resources in hci_unregister_dev()
2021-08-12 13:20:58 +02:00
net: caif: add proper error handling
2021-06-10 13:37:09 +02:00
netfilter: nf_queue: fix possible use-after-free
2022-03-08 19:07:47 +01:00
ipv4: convert fib_num_tclassid_users to atomic_t
2021-12-08 09:01:12 +01:00
NFC: add NCI_UNREG flag to eliminate the race
2021-12-01 09:23:35 +01:00
sctp: use call_rcu to free endpoint
2022-01-05 12:37:44 +01:00
net: sched: Fix suspicious RCU usage while accessing tcf_tunnel_info
2021-12-22 09:29:40 +01:00
net: sched: fix police ext initialization
2021-03-04 10:26:53 +01:00
net: bridge: mcast: fix broken length + header check for MRDv6 Adv.
2021-05-14 09:44:32 +02:00
rxrpc: Make rxrpc_kernel_get_srtt() indicate validity
2020-09-09 19:12:23 +02:00
ipv4: Invalidate neighbour for broadcast address upon address addition
2022-04-15 14:18:33 +02:00
bonding: fix data-races around agg_select_timer
2022-02-23 11:59:58 +01:00
bonding: make tx_rebalance_counter an atomic
2021-12-14 14:49:00 +01:00
bonding: wait for sysfs kobject destruction before freeing struct slave
2020-12-08 10:40:24 +01:00
bpf: support cloning sk storage on accept()
2019-08-17 23:18:54 +02:00
net: annotate data race around sk_ll_usec
2021-07-31 08:19:38 +02:00
mac80211: properly handle A-MSDUs that start with an RFC 1042 header
2021-06-03 08:59:01 +02:00
net: Force inlining of checksum functions in net/checksum.h
2022-03-02 11:41:08 +01:00
devlink: disallow reload operation during device cleanup
2019-11-09 19:38:36 -08:00
net: drop_monitor: use IS_REACHABLE() to guard net_dm_hw_report()
2020-05-27 17:46:24 +02:00
net: dsa: Pass ndo_setup_tc slave callback to drivers
2019-09-16 21:32:57 +02:00
net: Added pointer check for dst->ops->neigh_lookup in dst_neigh_lookup_skb
2020-07-22 09:32:47 +02:00
net: fix a memleak when uncloning an skb dst and its metadata
2022-02-16 12:52:51 +01:00
net: add bool confirm_neigh parameter for dst_ops.update_pmtu
2020-01-04 19:18:58 +01:00
esp: Fix possible buffer overflow in ESP transformation
2022-03-28 08:46:44 +02:00
ipv6: fix memory leak in fib6_rule_suppress
2021-12-08 09:01:13 +01:00
ipv4: Initialize flowi4_multipath_hash in data path
2020-09-26 18:03:12 +02:00
net: sched: correct flower port blocking
2020-03-05 16:43:32 +01:00
net: core: rename indirect block ingress cb function
2019-12-18 16:08:47 +01:00
net/flow_dissector: switch to siphash
2019-10-23 20:13:22 -07:00
net/fq_impl: Switch to kvmalloc() for memory allocation
2019-11-08 09:11:49 +01:00
genetlink: remove genl_bind
2020-07-22 09:32:46 +02:00
net: hwbm: if CONFIG_NET_HWBM unset, make stub functions static
2019-10-25 16:24:32 -07:00
net: icmp: pass zeroed opts from icmp{,v6}_ndo_send before sending
2021-03-04 10:26:53 +01:00
ipv6: shrink struct ipv6_mc_socklist
2019-08-28 14:43:03 -07:00
tcp: relookup sock for RST+ACK packets handled by obsolete req sock
2021-03-30 14:35:26 +02:00
inet_ecn: Fix endianness of checksum update when setting ECT(1)
2020-12-08 10:40:25 +01:00
inet: frags: annotate races around fqdir->dead and fqdir->high_thresh
2022-01-27 09:19:54 +01:00
dccp: Fix possible memleak in dccp_init and dccp_fini
2020-06-17 16:40:32 +02:00
ip: support SO_MARK cmsg
2019-09-13 21:44:19 +02:00
tcp: honor SO_PRIORITY in TIME_WAIT state
2019-09-27 12:05:02 +02:00
ipv4: avoid using shared IP generator for connected sockets
2022-02-01 17:24:37 +01:00
ipv6: annotate accesses to fn->fn_sernum
2022-02-01 17:24:38 +01:00
net: ipv6: fix returned variable type in ip6_skb_dst_mtu
2021-08-12 13:20:57 +02:00
ipv4: convert fib_num_tclassid_users to atomic_t
2021-12-08 09:01:12 +01:00
ip_tunnels: Set tunnel option flag when tunnel metadata is present
2020-11-24 13:29:05 +01:00
ipvs: allow connection reuse for unconfirmed conntrack
2020-08-19 08:16:10 +02:00
net: ipv6: add net argument to ip6_dst_lookup_flow
2019-12-18 16:08:40 +01:00
inet: frags: annotate races around fqdir->dead and fqdir->high_thresh
2022-01-27 09:19:54 +01:00
net: ipv6: add fib6_nh_release_dsts stub
2021-12-01 09:23:33 +01:00
bonding/alb: properly access headers in bond_alb_xmit()
2020-02-11 04:35:48 -08:00
llc: fix out-of-bound array index in llc_sk_dev_hash()
2021-11-17 09:48:47 +01:00
llc: fix sk_buff leak in llc_conn_service()
2019-10-08 13:23:05 -07:00
net: llc: fix skb_over_panic
2021-08-04 12:27:39 +02:00
mac80211: populate debugfs only after cfg80211 init
2020-04-29 16:33:18 +02:00
net: avoid potential false sharing in neighbor related code
2019-12-31 16:45:03 +01:00
net, neigh: Enable state migration between NUD_PERMANENT and NTF_USE
2021-11-17 09:48:49 +01:00
net: make get_net_ns return error if NET_NS is disabled
2021-06-23 14:41:25 +02:00
netlink: Fix nlmsg_parse as a wrapper for strict message parsing
2019-08-13 20:37:16 -07:00
net: ipv4: Fix rtnexthop len when RTA_FLOW is present
2021-10-06 15:42:33 +02:00
net: ieee802154: handle iftypes as u32
2021-12-01 09:23:32 +01:00
mm: fix struct page layout on 32-bit systems
2021-05-19 10:08:31 +02:00
net_sched: fix ops->bind_class() implementations
2020-02-01 09:34:38 +00:00
net: prevent user from passing illegal stab size
2021-10-17 10:42:34 +02:00
psample: Add a fwd declaration for skbuff
2021-08-18 08:56:59 +02:00
sch_red: fix off-by-one checks in red_check_params()
2021-04-14 08:24:14 +02:00
net: add {READ|WRITE}_ONCE() annotations on ->rskq_accept_head
2019-10-09 21:34:31 -07:00
ipv4: remove sparse error in ip_neigh_gw4()
2022-02-01 17:24:39 +01:00
can: dev: Move device back to init netns on owning netns delete
2021-03-30 14:35:29 +02:00
net_sched: restore "mpu xxx" handling
2022-01-27 09:19:55 +01:00
esp: Fix possible buffer overflow in ESP transformation
2022-03-28 08:46:44 +02:00
udp: correct reuseport selection with connected sockets
2019-09-16 09:02:18 +02:00
bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding
2021-11-17 09:48:48 +01:00
tcp: fix SO_RCVLOWAT related hangs under mem pressure
2021-03-04 10:26:17 +01:00
net/tls: Fix flipped sign in tls_err_abort() calls
2021-11-02 19:46:12 +01:00
udp: call udp_encap_enable for v6 sockets when enabling encap
2022-04-15 14:18:01 +02:00
udp: call udp_encap_enable for v6 sockets when enabling encap
2022-04-15 14:18:01 +02:00
vxlan: add adjacent link to limit depth level
2019-10-24 14:53:49 -07:00
page_pool: do not release pool until inflight == 0.
2019-12-18 16:09:07 +01:00
xsk: add support to allow unaligned chunk placement
2019-08-31 01:08:26 +02:00
xfrm: Check if_id in xfrm_migrate
2022-03-19 13:40:16 +01:00
73dd98ac19