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Gergely Risko a914e1132f ipv6: fix reachability confirmation with proxy_ndp ... commit 9f535c870e upstream. When proxying IPv6 NDP requests, the adverts to the initial multicast solicits are correct and working. On the other hand, when later a reachability confirmation is requested (on unicast), no reply is sent. This causes the neighbor entry expiring on the sending node, which is mostly a non-issue, as a new multicast request is sent. There are routers, where the multicast requests are intentionally delayed, and in these environments the current implementation causes periodic packet loss for the proxied endpoints. The root cause is the erroneous decrease of the hop limit, as this is checked in ndisc.c and no answer is generated when it's 254 instead of the correct 255. Cc: stable@vger.kernel.org Fixes: 46c7655f0b ("ipv6: decrease hop limit counter in ip6_forward()") Signed-off-by: Gergely Risko <gergely.risko@gmail.com> Tested-by: Gergely Risko <gergely.risko@gmail.com> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2023-02-01 08:34:39 +01:00
..
ila	genetlink: start to validate reserved header bytes	2022-08-29 12:47:15 +01:00
netfilter	netfilter: rpfilter/fib: Set ->flowic_uid correctly for user namespaces.	2022-10-19 08:46:48 +02:00
addrconf.c	Networking fixes for 6.1-rc2, including fixes from netfilter	2022-10-20 17:24:59 -07:00
addrconf_core.c	net: rename reference+tracking helpers	2022-06-09 21:52:55 -07:00
addrlabel.c	ipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network	2022-11-07 12:26:15 +00:00
af_inet6.c	net: Return errno in sk->sk_prot->get_port().	2022-12-31 13:32:13 +01:00
ah6.c	xfrm: ah: add extack to ah_init_state, ah6_init_state	2022-09-29 07:17:59 +02:00
anycast.c	ipv6: fix memory leaks on IPV6_ADDRFORM path	2020-07-30 16:30:55 -07:00
calipso.c	cipso,calipso: resolve a number of problems with the DOI refcounts	2021-03-04 15:26:57 -08:00
datagram.c	net: setsockopt: fix IPV6_UNICAST_IF option for connected sockets	2022-12-31 13:32:27 +01:00
esp6.c	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next	2022-10-03 07:52:13 +01:00
esp6_offload.c	xfrm: replay: Fix ESN wrap around for GSO	2022-10-19 09:00:53 +02:00
exthdrs.c	net: ipv6: add skb drop reasons to TLV parse	2022-04-13 13:09:57 +01:00
exthdrs_core.c	ipv6: remove printk	2019-07-27 14:23:48 -07:00
exthdrs_offload.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
fib6_notifier.c	net: fib_notifier: propagate extack down to the notifier block callback	2019-10-04 11:10:56 -07:00
fib6_rules.c	ipv6: change fib6_rules_net_exit() to batch mode	2022-02-08 20:41:34 -08:00
fou6.c	net: Add MODULE_DESCRIPTION entries to network modules	2020-06-20 21:33:57 -07:00
icmp.c	icmp: Fix data-races around sysctl_icmp_echo_enable_probe.	2022-07-13 12:56:49 +01:00
inet6_connection_sock.c	lsm,selinux: pass flowi_common instead of flowi to the LSM hooks	2020-11-23 18:36:21 -05:00
inet6_hashtables.c	tcp: Access &tcp_hashinfo via net.	2022-09-20 10:21:49 -07:00
ioam6.c	genetlink: start to validate reserved header bytes	2022-08-29 12:47:15 +01:00
ioam6_iptunnel.c	ipv6: ioam: Insertion frequency in lwtunnel output	2022-02-04 20:24:45 -08:00
ip6_checksum.c	net: udp: fix handling of CHECKSUM_COMPLETE packets	2018-10-24 14:18:16 -07:00
ip6_fib.c	ipv6: annotate accesses to fn->fn_sernum	2022-01-20 20:18:37 -08:00
ip6_flowlabel.c	treewide: use get_random_u32() when possible	2022-10-11 17:42:58 -06:00
ip6_gre.c	ipv6: ensure sane device mtu in tunnels	2022-10-25 16:04:22 -07:00
ip6_icmp.c	net: icmp: pass zeroed opts from icmp{,v6}_ndo_send before sending	2021-02-23 11:29:52 -08:00
ip6_input.c	tcp/udp: Make early_demux back namespacified.	2022-07-15 18:50:35 -07:00
ip6_offload.c	net-next: skbuff: refactor pskb_pull	2022-09-30 12:31:46 +01:00
ip6_offload.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
ip6_output.c	ipv6: fix reachability confirmation with proxy_ndp	2023-02-01 08:34:39 +01:00
ip6_tunnel.c	ipv6: ensure sane device mtu in tunnels	2022-10-25 16:04:22 -07:00
ip6_udp_tunnel.c	net: Make locking in sock_bindtoindex optional	2020-06-01 14:57:14 -07:00
ip6_vti.c	ip6_vti:Remove the space before the comma	2022-09-30 13:10:44 +01:00
ip6mr.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-09-22 13:02:10 -07:00
ipcomp6.c	xfrm: ipcomp: add extack to ipcomp{4,6}_init_state	2022-09-29 07:18:00 +02:00
ipv6_sockglue.c	tcp: Fix data races around icsk->icsk_af_ops.	2022-10-12 17:50:37 -07:00
Kconfig	crypto: lib - make the sha1 library optional	2022-07-15 16:43:59 +08:00
Makefile	net: ipv6: use ipv6-y directly instead of ipv6-objs	2021-09-28 13:13:40 +01:00
mcast.c	treewide: use prandom_u32_max() when possible, part 1	2022-10-11 17:42:55 -06:00
mcast_snoop.c	net: bridge: mcast: fix broken length + header check for MRDv6 Adv.	2021-04-27 14:02:06 -07:00
mip6.c	xfrm: mip6: add extack to mip6_destopt_init_state, mip6_rthdr_init_state	2022-09-29 07:18:01 +02:00
ndisc.c	net: fix potential refcount leak in ndisc_router_discovery()	2022-08-15 11:40:28 +01:00
netfilter.c	netfilter: Use l3mdev flow key when re-routing mangled packets	2022-05-16 13:03:29 +02:00
output_core.c	treewide: use get_random_u32() when possible	2022-10-11 17:42:58 -06:00
ping.c	inet: ping: fix recent breakage	2022-10-12 09:10:02 +01:00
proc.c	net: udp: introduce UDP_MIB_MEMERRORS for udp_mem	2020-11-09 15:34:44 -08:00
protocol.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
raw.c	ipv6: raw: Deduct extension header length in rawv6_push_pending_frames	2023-01-18 11:58:19 +01:00
reassembly.c	net: ipv6: Handle delivery_time in ipv6 defrag	2022-03-03 14:38:48 +00:00
route.c	ipv6: fix WARNING in ip6_route_net_exit_late()	2022-11-02 20:47:14 -07:00
rpl.c	net: ipv6: rpl*: Fix strange kerneldoc warnings due to bad header	2020-10-30 12:12:52 -07:00
rpl_iptunnel.c	net: ipv6: rpl_iptunnel: simplify the return expression of rpl_do_srh()	2020-12-08 16:22:54 -08:00
seg6.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-09-08 18:38:30 +02:00
seg6_hmac.c	net: ipv6: unexport __init-annotated seg6_hmac_net_init()	2022-06-28 21:23:30 -07:00
seg6_iptunnel.c	seg6: add support for SRv6 H.L2Encaps.Red behavior	2022-07-29 12:14:03 +01:00
seg6_local.c	seg6: add NEXT-C-SID support for SRv6 End behavior	2022-09-20 12:33:22 +02:00
sit.c	ipv6/sit: use DEV_STATS_INC() to avoid data-races	2022-12-31 13:33:02 +01:00
syncookies.c	tcp: Fix data-races around sysctl_tcp_syncookies.	2022-07-18 12:21:54 +01:00
sysctl_net_ipv6.c	net: sysctl: introduce sysctl SYSCTL_THREE	2022-05-03 10:15:06 +02:00
tcp_ipv6.c	dccp/tcp: Fixup bhash2 bucket when connect() fails.	2022-11-22 20:15:37 -08:00
tcpv6_offload.c	net: move gro definitions to include/net/gro.h	2021-11-16 13:16:54 +00:00
tunnel6.c	tunnel6: add tunnel6_input_afinfo for ipip and ipv6 tunnels	2020-07-09 12:52:37 +02:00
udp.c	udp: Clean up some functions.	2022-12-31 13:32:13 +01:00
udp_impl.h	tcp/udp: Call inet6_destroy_sock() in IPv6 sk->sk_destruct().	2022-10-12 17:50:37 -07:00
udp_offload.c	gro: remove rcu_read_lock/rcu_read_unlock from gro_receive handlers	2021-11-24 17:21:42 -08:00
udplite.c	tcp/udp: Call inet6_destroy_sock() in IPv6 sk->sk_destruct().	2022-10-12 17:50:37 -07:00
xfrm6_input.c	xfrm: state: remove extract_input indirection from xfrm_state_afinfo	2020-05-06 09:40:08 +02:00
xfrm6_output.c	xfrm: fix tunnel model fragmentation behavior	2022-03-01 12:08:40 +01:00
xfrm6_policy.c	xfrm: Fix ignored return value in xfrm6_init()	2022-11-22 07:16:34 +01:00
xfrm6_protocol.c	xfrm: add support for UDPv6 encapsulation of ESP	2020-04-28 11:28:36 +02:00
xfrm6_state.c	xfrm: remove output_finish indirection from xfrm_state_afinfo	2020-05-06 09:40:08 +02:00
xfrm6_tunnel.c	xfrm: tunnel: add extack to ipip_init_state, xfrm6_tunnel_init_state	2022-09-29 07:18:00 +02:00