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Nicolas Dichtel 79ec7b5b2f ipv6: fix 'disable_policy' for fwd packets 
[ Upstream commit ccd27f05ae ]

The goal of commit df789fe752 ("ipv6: Provide ipv6 version of
"disable_policy" sysctl") was to have the disable_policy from ipv4
available on ipv6.
However, it's not exactly the same mechanism. On IPv4, all packets coming
from an interface, which has disable_policy set, bypass the policy check.
For ipv6, this is done only for local packets, ie for packets destinated to
an address configured on the incoming interface.

Let's align ipv6 with ipv4 so that the 'disable_policy' sysctl has the same
effect for both protocols.

My first approach was to create a new kind of route cache entries, to be
able to set DST_NOPOLICY without modifying routes. This would have added a
lot of code. Because the local delivery path is already handled, I choose
to focus on the forwarding path to minimize code churn.

Fixes: df789fe752 ("ipv6: Provide ipv6 version of "disable_policy" sysctl")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-07-28 14:35:33 +02:00
..
ila net: Add MODULE_DESCRIPTION entries to network modules 2020-06-20 21:33:57 -07:00
netfilter netfilter: nft_fib_ipv6: skip ipv6 packets from any to link-local 2021-06-23 14:42:42 +02:00
addrconf.c net: ipv4: Remove unneed BUG() function 2021-06-30 08:47:20 -04:00
addrconf_core.c ipv6: add ipv6_fragment hook in ipv6_stub 2020-08-31 12:26:39 -07:00
addrlabel.c ipv6: addrlabel: fix possible memory leak in ip6addrlbl_net_init 2020-11-25 11:20:16 -08:00
af_inet6.c ipv6: add ipv6_fragment hook in ipv6_stub 2020-08-31 12:26:39 -07:00
ah6.c xfrm: Use actual socket sk instead of skb socket for xfrm_output_resume 2021-04-14 08:42:05 +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 2021-03-17 17:06:15 +01:00
datagram.c icmp6: support rfc 4884 2020-07-24 17:12:41 -07:00
esp6.c xfrm: xfrm_state_mtu should return at least 1280 for ipv6 2021-07-14 16:56:14 +02:00
esp6_offload.c xfrm: Provide private skb extensions for segmented and hw offloaded ESP packets 2021-04-14 08:42:07 +02:00
exthdrs.c ipv6: fix out-of-bound access in ip6_parse_tlv() 2021-07-14 16:56:28 +02:00
exthdrs_core.c ipv6: remove printk 2019-07-27 14:23:48 -07:00
exthdrs_offload.c
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 fib: use indirect call wrappers in the most common fib_rules_ops 2020-07-28 17:42:31 -07:00
fou6.c net: Add MODULE_DESCRIPTION entries to network modules 2020-06-20 21:33:57 -07:00
icmp.c net: icmp: pass zeroed opts from icmp{,v6}_ndo_send before sending 2021-03-04 11:38:46 +01:00
inet6_connection_sock.c net: add bool confirm_neigh parameter for dst_ops.update_pmtu 2019-12-24 22:28:54 -08:00
inet6_hashtables.c net: ipv6: remove unused arg exact_dif in compute_score 2020-08-31 13:08:10 -07:00
ip6_checksum.c
ip6_fib.c ipv6: fix suspecious RCU usage warning 2021-03-30 14:31:57 +02:00
ip6_flowlabel.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-08-05 20:13:21 -07:00
ip6_gre.c ipv6: remove extra dev_hold() for fallback tunnels 2021-05-22 11:40:55 +02:00
ip6_icmp.c net: icmp: pass zeroed opts from icmp{,v6}_ndo_send before sending 2021-03-04 11:38:46 +01:00
ip6_input.c ipv6: weaken the v4mapped source check 2021-03-30 14:32:01 +02:00
ip6_offload.c udp: move gro declarations to net/udp.h 2020-06-23 20:10:15 -07:00
ip6_offload.h
ip6_output.c ipv6: fix 'disable_policy' for fwd packets 2021-07-28 14:35:33 +02:00
ip6_tunnel.c ip6_tunnel: fix GRE6 segmentation 2021-07-14 16:56:25 +02:00
ip6_udp_tunnel.c net: Make locking in sock_bindtoindex optional 2020-06-01 14:57:14 -07:00
ip6_vti.c ipv6: remove extra dev_hold() for fallback tunnels 2021-05-22 11:40:55 +02:00
ip6mr.c net/ipv6: switch ip6_mroute_setsockopt to sockptr_t 2020-07-24 15:41:54 -07:00
ipcomp6.c ipcomp: assign if_id to child tunnel from parent tunnel 2020-07-09 12:55:37 +02:00
ipv6_sockglue.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-08-02 01:02:12 -07:00
Kconfig net: ipv6: fix kconfig dependency warning for IPV6_SEG6_HMAC 2020-09-18 17:45:04 -07:00
Makefile net: ipv6: add rpl sr tunnel 2020-03-29 22:30:57 -07:00
mcast.c mld: fix panic in mld_newpack() 2021-06-03 09:00:48 +02:00
mcast_snoop.c net: bridge: mcast: fix broken length + header check for MRDv6 Adv. 2021-05-14 09:50:44 +02:00
mip6.c
ndisc.c net: Exempt multicast addresses from five-second neighbor lifetime 2020-11-13 14:24:39 -08:00
netfilter.c netfilter: use actual socket sk rather than skb sk when routing harder 2020-10-30 12:57:39 +01:00
output_core.c ipv6: use prandom_u32() for ID generation 2021-07-19 09:44:44 +02:00
ping.c ipv6/ping: set skb->mark on icmpv6 sockets 2020-07-03 14:36:04 -07:00
proc.c
protocol.c
raw.c net-ipv6: bugfix - raw & sctp - switch to ipv6_can_nonlocal_bind() 2021-04-14 08:42:02 +02:00
reassembly.c ipv6: record frag_max_size in atomic fragments in input path 2021-06-03 09:00:50 +02:00
route.c ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions 2021-06-10 13:39:20 +02:00
rpl.c ipv6: rpl: fix full address compression 2020-04-18 15:04:27 -07:00
rpl_iptunnel.c net: ipv6: Use struct_size() helper and kcalloc() 2020-06-23 20:27:09 -07:00
seg6.c seg6: fix seg6_validate_srh() to avoid slab-out-of-bounds 2020-06-04 15:39:32 -07:00
seg6_hmac.c crypto: lib/sha1 - remove unnecessary includes of linux/cryptohash.h 2020-05-08 15:32:17 +10:00
seg6_iptunnel.c seg6_iptunnel: Refactor seg6_lwt_headroom out of uapi header 2020-08-03 17:57:40 -07:00
seg6_local.c seg6: fix seg6_validate_srh() to avoid slab-out-of-bounds 2020-06-04 15:39:32 -07:00
sit.c ipv6: remove extra dev_hold() for fallback tunnels 2021-05-22 11:40:55 +02:00
syncookies.c net: Update window_clamp if SOCK_RCVBUF is set 2020-11-10 17:42:35 -08:00
sysctl_net_ipv6.c ipv6: Fix sysctl max for fib_multipath_hash_policy 2020-09-02 15:44:53 -07:00
tcp_ipv6.c ipv6: tcp: drop silly ICMPv6 packet too big messages 2021-07-25 14:36:21 +02:00
tcpv6_offload.c
tunnel6.c tunnel6: add tunnel6_input_afinfo for ipip and ipv6 tunnels 2020-07-09 12:52:37 +02:00
udp.c udp: annotate data races around unix_sk(sk)->gso_size 2021-07-25 14:36:22 +02:00
udp_impl.h net: pass a sockptr_t into ->setsockopt 2020-07-24 15:41:54 -07:00
udp_offload.c udp: ipv4: manipulate network header of NATed UDP GRO fraglist 2021-02-10 09:29:23 +01:00
udplite.c net/ipv6: remove compat_ipv6_{get,set}sockopt 2020-07-19 18:16:41 -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 net: ipv6: fix return value of ip6_skb_dst_mtu 2021-07-25 14:36:18 +02:00
xfrm6_policy.c net: add bool confirm_neigh parameter for dst_ops.update_pmtu 2019-12-24 22:28:54 -08:00
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: interface: fix the priorities for ipip and ipv6 tunnels 2020-10-09 12:29:48 +02:00