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09c6629531
android_kernel_asus_sm8350/net/ipv4
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Jiri Bohac 09c6629531 Revert "xfrm: xfrm_state_mtu should return at least 1280 for ipv6" 
This reverts commit b515d2637276a3810d6595e10ab02c13bfd0b63a.

Commit b515d2637276a3810d6595e10ab02c13bfd0b63a ("xfrm: xfrm_state_mtu
should return at least 1280 for ipv6") in v5.14 breaks the TCP MSS
calculation in ipsec transport mode, resulting complete stalls of TCP
connections. This happens when the (P)MTU is 1280 or slighly larger.

The desired formula for the MSS is:
MSS = (MTU - ESP_overhead) - IP header - TCP header

However, the above commit clamps the (MTU - ESP_overhead) to a
minimum of 1280, turning the formula into
MSS = max(MTU - ESP overhead, 1280) -  IP header - TCP header

With the (P)MTU near 1280, the calculated MSS is too large and the
resulting TCP packets never make it to the destination because they
are over the actual PMTU.

The above commit also causes suboptimal double fragmentation in
xfrm tunnel mode, as described in
https://lore.kernel.org/netdev/20210429202529.codhwpc7w6kbudug@dwarf.suse.cz/

The original problem the above commit was trying to fix is now fixed
by commit 6596a0229541270fb8d38d989f91b78838e5e9da ("xfrm: fix MTU
regression").

Change-Id: Iefabad76eb1870f74b819f45e9d3a51cbc94549c
Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Git-commit: a6d95c5a628a09be129f25d5663a7e9db8261f51
Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git
Signed-off-by: Sharath Chandra Vurukala<quic_sharathv@quicinc.com>
2022-03-12 15:15:37 +05:30
..
bpfilter SPDX update for 5.2-rc2, round 1 2019-05-21 12:33:38 -07:00
netfilter Merge android11-5.4.134+ (dca02b1) into msm-5.4 2021-10-06 09:48:07 +05:30
af_inet.c BACKPORT: FROMLIST: net: introduce ip_local_unbindable_ports sysctl 2019-12-13 09:50:32 -08:00
ah4.c xfrm: remove type and offload_type map from xfrm_state_afinfo 2019-06-06 08:34:50 +02:00
arp.c Revert "Exempt multicast addresses from five-second neighbor lifetime" 2020-11-25 17:38:41 +01:00
cipso_ipv4.c net: ipv4: fix memory leak in netlbl_cipsov4_add_std 2021-06-23 14:41:24 +02:00
datagram.c inet: stop leaking jiffies on the wire 2019-11-01 14:57:52 -07:00
devinet.c net: ipv4: Remove unneed BUG() function 2021-06-30 08:47:46 -04:00
esp4_offload.c esp: delete NETIF_F_SCTP_CRC bit from features for esp offload 2021-04-14 08:24:13 +02:00
esp4.c Revert "xfrm: xfrm_state_mtu should return at least 1280 for ipv6" 2022-03-12 15:15:37 +05:30
fib_frontend.c net/ipv4: swap flow ports when validating source 2021-07-14 16:53:31 +02:00
fib_lookup.h ipv4: Use accessors for fib_info nexthop data 2019-06-04 19:26:49 -07:00
fib_notifier.c
fib_rules.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-07 11:00:14 -07:00
fib_semantics.c net: ipv4: Fix rtnexthop len when RTA_FLOW is present 2021-10-06 15:42:33 +02:00
fib_trie.c ipv4: Silence suspicious RCU usage warning 2020-09-12 14:18:54 +02:00
fou.c fou: Fix IPv6 netlink policy 2020-01-29 16:45:22 +01:00
gre_demux.c erspan: fix version 1 check in gre_parse_header() 2021-01-12 20:16:15 +01:00
gre_offload.c net: gre: recompute gre csum for sctp over gre tunnels 2020-08-11 15:33:40 +02:00
icmp.c ipv4/icmp: l3mdev: Perform icmp error route lookup on source device routing table (v2) 2021-09-12 08:56:40 +02:00
igmp.c This is the 5.4.145 stable release 2021-09-12 09:54:40 +02:00
inet_connection_sock.c tcp: relookup sock for RST+ACK packets handled by obsolete req sock 2021-03-30 14:35:26 +02:00
inet_diag.c inet_diag: Fix error path to cancel the meseage in inet_req_diag_fill() 2020-11-24 13:28:56 +01:00
inet_fragment.c inet: frags: re-introduce skb coalescing for local delivery 2019-08-08 15:55:10 -07:00
inet_hashtables.c net: prefer socket bound to interface when not in VRF 2021-10-13 10:08:20 +02:00
inet_timewait_sock.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
inetpeer.c inetpeer: fix data-race in inet_putpeer / inet_putpeer 2020-01-04 19:18:39 +01:00
ip_forward.c ipv4: Revert removal of rt_uses_gateway 2019-09-20 18:23:33 -07:00
ip_fragment.c inet: frags: re-introduce skb coalescing for local delivery 2019-08-08 15:55:10 -07:00
ip_gre.c ip_gre: validate csum_start only on pull 2021-09-22 12:26:45 +02:00
ip_input.c netfilter: drop bridge nf reset from nf_reset 2019-10-01 18:42:15 +02:00
ip_options.c netfilter: nf_tables: add support for matching IPv4 options 2019-06-21 18:35:51 +02:00
ip_output.c ipv4: ip_output.c: Fix out-of-bounds warning in ip_copy_addrs() 2021-09-22 12:26:29 +02:00
ip_sockglue.c ip_sockglue: Fix missing-check bug in ip_ra_control() 2019-05-25 11:00:50 -07:00
ip_tunnel_core.c ip_tunnel: allow not to count pkts on tstats by setting skb's dev to NULL 2019-06-18 20:48:45 -04:00
ip_tunnel.c net: Set true network header for ECN decapsulation 2021-08-04 12:27:39 +02:00
ip_vti.c ip_vti: receive ipip packet by calling ip_tunnel_rcv 2020-06-03 08:21:34 +02:00
ipcomp.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2019-07-05 15:01:15 -07:00
ipconfig.c net: ipconfig: Don't override command-line hostnames or domains 2021-06-18 09:58:59 +02:00
ipip.c net: ipip: fix wrong address family in init error path 2020-06-03 08:20:52 +02:00
ipmr_base.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-05-07 17:22:09 -07:00
ipmr.c net: don't return invalid table id error when we fall back to PF_UNSPEC 2020-06-03 08:20:41 +02:00
Kconfig vti[6]: fix packet tx through bpf_redirect() in XinY cases 2020-04-01 11:02:05 +02:00
Makefile net: Initial nexthop code 2019-05-28 21:37:30 -07:00
metrics.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
netfilter.c netfilter: use actual socket sk rather than skb sk when routing harder 2020-11-18 19:20:17 +01:00
netlink.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
nexthop.c Set fc_nlinfo in nh_create_ipv4, nh_create_ipv6 2021-09-22 12:26:44 +02:00
ping.c ping: Check return value of function 'ping_queue_rcv_skb' 2021-06-30 08:47:47 -04:00
proc.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-17 20:20:36 -07:00
protocol.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
raw_diag.c inet_diag: return classid for all socket types 2020-03-18 07:17:38 +01:00
raw.c netfilter: drop bridge nf reset from nf_reset 2019-10-01 18:42:15 +02:00
route.c ipv4: use siphash instead of Jenkins in fnhe_hashfun() 2021-11-02 19:46:11 +01:00
syncookies.c net: Update window_clamp if SOCK_RCVBUF is set 2020-11-18 19:20:32 +01:00
sysctl_net_ipv4.c WLAN subsystem: Sysctl support for key TCP/IP parameters 2021-01-29 16:50:05 +05:30
tcp_bbr.c tcp_bbr: fix u32 wrap bug in round logic if bbr_init() called after 2B packets 2021-08-18 08:57:01 +02:00
tcp_bic.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
tcp_bpf.c tcp_bpf: Fix one concurrency problem in the tcp_bpf_send_verdict function 2021-11-02 19:46:13 +01:00
tcp_cdg.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
tcp_cong.c net: Only allow init netns to set default tcp cong to a restricted algo 2021-05-14 09:44:33 +02:00
tcp_cubic.c tcp_cubic: fix spurious HYSTART_DELAY exit upon drop in min RTT 2020-06-30 15:36:47 -04:00
tcp_dctcp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
tcp_dctcp.h
tcp_diag.c tcp: annotate tp->write_seq lockless reads 2019-10-13 10:13:08 -07:00
tcp_fastopen.c tcp: enable data-less, empty-cookie SYN with TFO_SERVER_COOKIE_NOT_REQD 2021-09-22 12:26:33 +02:00
tcp_highspeed.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
tcp_htcp.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
tcp_hybla.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
tcp_illinois.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
tcp_input.c Merge android11-5.4.161+ (b9d179c) into msm-5.4 2022-02-07 22:29:21 +05:30
tcp_ipv4.c Merge android11-5.4.147+ (dc8c919) into msm-5.4 2021-11-05 17:27:33 +05:30
tcp_lp.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
tcp_metrics.c tcp: refactor setting the initial congestion window 2019-05-01 11:47:54 -04:00
tcp_minisocks.c tcp: relookup sock for RST+ACK packets handled by obsolete req sock 2021-03-30 14:35:26 +02:00
tcp_nv.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
tcp_offload.c net, gro: Set inner transport header offset in tcp/udp GRO hook 2021-08-12 13:20:56 +02:00
tcp_output.c Merge android11-5.4.147+ (dc8c919) into msm-5.4 2021-11-05 17:27:33 +05:30
tcp_rate.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
tcp_recovery.c tcp: fix TLP timer not set when CA_STATE changes from DISORDER to OPEN 2021-02-03 23:26:02 +01:00
tcp_scalable.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
tcp_timer.c Merge android11-5.4.134+ (dca02b1) into msm-5.4 2021-10-06 09:48:07 +05:30
tcp_ulp.c bpf: Sockmap/tls, push write_space updates through ulp updates 2020-01-23 08:22:45 +01:00
tcp_vegas.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
tcp_vegas.h
tcp_veno.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
tcp_westwood.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
tcp_yeah.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
tcp.c Merge android11-5.4.161+ (b9d179c) into msm-5.4 2022-02-07 22:29:21 +05:30
tunnel4.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
udp_diag.c inet_diag: return classid for all socket types 2020-03-18 07:17:38 +01:00
udp_impl.h udp: add missing rehash callback to udplite 2019-01-17 15:01:08 -08:00
udp_offload.c Merge tag 'android11-5.4.147_r00' android11-5.4 2021-10-20 10:32:16 +02:00
udp_tunnel.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
udp.c Merge android11-5.4.161+ (b9d179c) into msm-5.4 2022-02-07 22:29:21 +05:30
udplite.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
xfrm4_input.c
xfrm4_output.c xfrm: Always set XFRM_TRANSFORMED in xfrm{4,6}_output_finish 2020-04-29 16:33:11 +02:00
xfrm4_policy.c net: add bool confirm_neigh parameter for dst_ops.update_pmtu 2020-01-04 19:18:58 +01:00
xfrm4_protocol.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
xfrm4_state.c xfrm: remove eth_proto value from xfrm_state_afinfo 2019-06-06 08:34:50 +02:00
xfrm4_tunnel.c xfrm: remove type and offload_type map from xfrm_state_afinfo 2019-06-06 08:34:50 +02:00