Ido Schimmel 2fb70f03fe ipv4: Invalidate neighbour for broadcast address upon address addition ... [ Upstream commit 0c51e12e21 ] 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>		2022-04-13 19:27:16 +02:00
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6lowpan
9p	xen/9p: use alloc/free_pages_exact()	2022-03-07 09:48:55 +01:00
802	net: 802: Use memset_startat() to clear struct fields	2021-11-19 11:23:23 +00:00
8021q	vlan: move dev_put into vlan_dev_uninit	2022-02-09 13:33:39 +00:00
appletalk
atm	proc: remove PDE_DATA() completely	2022-01-22 08:33:37 +02:00
ax25	ax25: fix UAF bug in ax25_send_control()	2022-04-08 13:58:59 +02:00
batman-adv	ipv6: make mc_forwarding atomic	2022-04-13 19:27:12 +02:00
bluetooth	Bluetooth: hci_sync: Fix queuing commands when HCI_UNREGISTER is set	2022-04-13 19:27:09 +02:00
bpf	bpf: Add dummy BPF STRUCT_OPS for test purpose	2021-11-01 14:10:00 -07:00
bpfilter
bridge	net: bridge: multicast: notify switchdev driver whenever MC processing gets disabled	2022-02-16 20:35:00 -08:00
caif	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-12-31 14:35:40 +00:00
can	can: isotp: restore accidentally removed MSG_PEEK feature	2022-04-08 13:58:58 +02:00
ceph	libceph: optionally use bounce buffer on recv path in crc mode	2022-02-02 18:50:36 +01:00
core	net: initialize init_net earlier	2022-04-13 19:27:12 +02:00
dcb	net: dcb: disable softirqs in dcbnl_flush_dev()	2022-03-03 08:01:55 -08:00
dccp	dccp: Inline dccp_listen_start().	2021-11-23 20:16:22 -08:00
decnet	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-12-31 14:35:40 +00:00
dns_resolver
dsa	net: dsa: fix panic on shutdown if multi-chip tree failed to probe	2022-04-08 13:58:22 +02:00
ethernet	gro: remove rcu_read_lock/rcu_read_unlock from gro_complete handlers	2021-11-24 17:21:42 -08:00
ethtool	ethtool: use phydev variable	2022-01-06 12:33:35 +00:00
hsr	net: Write lock dev_base_lock without disabling bottom halves.	2021-11-29 12:12:36 +00:00
ieee802154	net: ieee802154: Return meaningful error codes from the netlink helpers	2022-01-27 08:20:47 +01:00
ife
ipv4	ipv4: Invalidate neighbour for broadcast address upon address addition	2022-04-13 19:27:16 +02:00
ipv6	ipv6: annotate some data-races around sk->sk_prot	2022-04-13 19:27:16 +02:00
iucv	net: Don't include filter.h from net/sock.h	2021-12-29 08:48:14 -08:00
kcm	net: Don't include filter.h from net/sock.h	2021-12-29 08:48:14 -08:00
key	af_key: add __GFP_ZERO flag for compose_sadb_supported in function pfkey_register	2022-03-10 07:39:47 +01:00
l2tp	l2tp: add netns refcount tracker to l2tp_dfs_seq_data	2021-12-10 06:38:27 -08:00
l3mdev
lapb
llc	llc: only change llc->dev when bind() succeeds	2022-03-28 10:03:22 +02:00
mac80211	mac80211: limit bandwidth in HE capabilities	2022-04-08 13:58:03 +02:00
mac802154	mac802154: use dev_addr_set() - manual	2021-10-20 14:27:40 +01:00
mctp	mctp: fix use after free	2022-02-15 14:54:40 +00:00
mpls	net: mpls: Fix GCC 12 warning	2022-02-10 15:29:39 +00:00
mptcp	mptcp: Fix crash due to tcp_tsorted_anchor was initialized before release skb	2022-04-08 13:58:21 +02:00
ncsi	all: replace find_next{,_zero}_bit with find_first{,_zero}_bit where appropriate	2022-01-15 08:47:31 -08:00
netfilter	netfilter: nf_conntrack_tcp: preserve liberal flag in tcp options	2022-04-08 13:58:31 +02:00
netlabel	lsm: security_task_getsecid_subj() -> security_current_getsecid_subj()	2021-11-22 17:52:47 -05:00
netlink	af_netlink: Fix shift out of bounds in group mask calculation	2022-04-08 13:58:21 +02:00
netrom	netrom: fix api breakage in nr_setsockopt()	2022-01-07 14:11:05 +00:00
nfc	Networking fixes for 5.17-rc1, including fixes from netfilter, bpf.	2022-01-20 10:57:05 +02:00
nsh
openvswitch	openvswitch: Fixed nd target mask field in the flow dump.	2022-04-08 13:59:03 +02:00
packet	net/packet: fix slab-out-of-bounds access in packet_recvmsg()	2022-03-14 22:08:34 -07:00
phonet	phonet/pep: refuse to enable an unbound pipe	2021-12-20 11:49:51 +00:00
psample
qrtr	bus: mhi: core: Add an API for auto queueing buffers for DL channel	2021-12-17 17:17:14 +01:00
rds	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-12-16 16:13:19 -08:00
rfkill	rfkill: make new event layout opt-in	2022-04-08 13:57:27 +02:00
rose	net: Don't include filter.h from net/sock.h	2021-12-29 08:48:14 -08:00
rxrpc	rxrpc: Fix call timer start racing with call destruction	2022-04-08 13:58:55 +02:00
sched	net/sched: act_ct: fix ref leak when switching zones	2022-04-08 13:58:35 +02:00
sctp	security: add sctp_assoc_established hook	2022-04-08 13:57:34 +02:00
smc	net/smc: Send directly when TCP_CORK is cleared	2022-04-13 19:27:10 +02:00
strparser	bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding	2021-11-09 01:05:28 +01:00
sunrpc	SUNRPC don't resend a task on an offlined transport	2022-04-08 13:58:31 +02:00
switchdev	net: switchdev: add net device refcount tracker	2021-12-07 20:44:58 -08:00
tipc	tipc: fix the timer expires after interval 100ms	2022-04-08 13:58:22 +02:00
tls	net/tls: Fix another skb memory leak when running kTLS traffic	2022-01-17 13:07:47 +00:00
unix	af_unix: Support POLLPRI for OOB.	2022-04-08 13:59:00 +02:00
vmw_vsock	vsock/virtio: enable VQs early on probe	2022-04-08 13:58:32 +02:00
wireless	cfg80211: don't add non transmitted BSS to 6GHz scanned channels	2022-04-13 19:27:11 +02:00
x25	net/x25: Fix null-ptr-deref caused by x25_disconnect	2022-04-08 13:58:34 +02:00
xdp	xsk: Do not write NULL in SW ring at allocation failure	2022-04-08 13:59:03 +02:00
xfrm	Revert "xfrm: state and policy should fail if XFRMA_IF_ID 0"	2022-03-06 08:38:28 +01:00
compat.c
devres.c
Kconfig	net: kunit: add a test for dev_addr_lists	2021-11-20 12:25:57 +00:00
Kconfig.debug	net: add networking namespace refcount tracker	2021-12-10 06:38:26 -08:00
Makefile
socket.c	net: fix documentation for kernel_getsockname	2022-02-14 14:01:19 +00:00
sysctl_net.c	sections: move and rename core_kernel_data() to is_kernel_core_data()	2021-11-09 10:02:50 -08:00