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b515d26372
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Sabrina Dubroca b515d26372 xfrm: xfrm_state_mtu should return at least 1280 for ipv6 
Jianwen reported that IPv6 Interoperability tests are failing in an
IPsec case where one of the links between the IPsec peers has an MTU
of 1280. The peer generates a packet larger than this MTU, the router
replies with a "Packet too big" message indicating an MTU of 1280.
When the peer tries to send another large packet, xfrm_state_mtu
returns 1280 - ipsec_overhead, which causes ip6_setup_cork to fail
with EINVAL.

We can fix this by forcing xfrm_state_mtu to return IPV6_MIN_MTU when
IPv6 is used. After going through IPsec, the packet will then be
fragmented to obey the actual network's PMTU, just before leaving the
host.

Currently, TFC padding is capped to PMTU - overhead to avoid
fragementation: after padding and encapsulation, we still fit within
the PMTU. That behavior is preserved in this patch.

Fixes: 91657eafb6 ("xfrm: take net hdr len into account for esp payload size calculation")
Reported-by: Jianwen Ji <jiji@redhat.com>
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2021-04-19 12:43:50 +02:00
..
6lowpan
9p net: 9p: advance iov on empty read 2021-03-03 16:57:59 -08:00
802
8021q Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-01-14 18:34:50 -08:00
appletalk appletalk: Fix skb allocation size in loopback case 2021-02-12 16:40:28 -08:00
atm net: atm: pppoatm: use new API for wakeup tasklet 2021-01-29 18:24:05 -08:00
ax25
batman-adv batman-adv: initialize "struct batadv_tvlv_tt_vlan_data"->reserved field 2021-04-05 15:06:03 -07:00
bluetooth Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kern 2021-02-11 14:59:01 -08:00
bpf Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-01-20 12:16:11 -08:00
bpfilter net: remove redundant 'depends on NET' 2021-01-27 17:04:12 -08:00
bridge netfilter: bridge: add pre_exit hooks for ebtable unregistration 2021-04-10 21:16:54 +02:00
caif net: caif: Use netif_rx_any_context(). 2021-02-15 13:21:48 -08:00
can can: isotp: fix msg_namelen values depending on CAN_REQUIRED_SIZE 2021-03-29 09:51:43 +02:00
ceph libceph: remove osdtimeout option entirely 2021-02-16 12:09:52 +01:00
core gro: ensure frag0 meets IP header alignment 2021-04-13 15:09:31 -07:00
dcb net: dcb: use obj-$(CONFIG_DCB) form in net/Makefile 2021-01-27 17:03:52 -08:00
dccp ipv6: weaken the v4mapped source check 2021-03-18 11:19:23 -07:00
decnet net: decnet: fix netdev refcount leaking on error path 2021-01-27 17:33:46 -08:00
dns_resolver net: remove redundant 'depends on NET' 2021-01-27 17:04:12 -08:00
dsa net: dsa: Fix type was not set for devlink port 2021-03-29 13:49:04 -07:00
ethernet net: datagram: fix some kernel-doc markups 2020-11-17 14:15:03 -08:00
ethtool ethtool: pause: make sure we init driver stats 2021-04-14 13:03:06 -07:00
hsr net: hsr: Reset MAC header for Tx path 2021-04-07 14:25:12 -07:00
ieee802154 net: ieee802154: stop dump llsec params for monitors 2021-04-06 22:34:38 +02:00
ife net: remove redundant 'depends on NET' 2021-01-27 17:04:12 -08:00
ipv4 xfrm: xfrm_state_mtu should return at least 1280 for ipv6 2021-04-19 12:43:50 +02:00
ipv6 xfrm: xfrm_state_mtu should return at least 1280 for ipv6 2021-04-19 12:43:50 +02:00
iucv net/af_iucv: build SG skbs for TRANS_HIPER sockets 2021-01-28 20:36:22 -08:00
kcm net: group skb_shinfo zerocopy related bits together. 2021-01-07 16:08:37 -08:00
key af_key: relax availability checks for skb size calculation 2021-01-04 10:05:50 +01:00
l2tp net: l2tp: reduce log level of messages in receive path, add counter instead 2021-03-03 16:55:02 -08:00
l3mdev net: l3mdev: use obj-$(CONFIG_NET_L3_MASTER_DEV) form in net/Makefile 2021-01-27 17:03:52 -08:00
lapb net: lapb: Copy the skb before sending a packet 2021-02-02 08:40:48 -08:00
llc net: remove redundant 'depends on NET' 2021-01-27 17:04:12 -08:00
mac80211 mac80211: fix time-is-after bug in mlme 2021-04-08 10:14:53 +02:00
mac802154 net: mac802154: Fix general protection fault 2021-04-06 22:42:16 +02:00
mpls net: avoid infinite loop in mpls_gso_segment when mpls_hlen == 0 2021-03-09 16:12:20 -08:00
mptcp mptcp: revert "mptcp: provide subflow aware release function" 2021-04-01 16:02:50 -07:00
ncsi net/ncsi: Avoid channel_monitor hrtimer deadlock 2021-03-30 13:16:23 -07:00
netfilter netfilter: nftables: clone set element expression template 2021-04-13 00:19:05 +02:00
netlabel cipso,calipso: resolve a number of problems with the DOI refcounts 2021-03-04 15:26:57 -08:00
netlink netlink: don't call ->netlink_bind with table lock held 2021-04-16 17:01:04 -07:00
netrom
nfc nfc: Avoid endless loops caused by repeated llcp_sock_connect() 2021-03-25 17:02:01 -07:00
nsh
openvswitch openvswitch: fix send of uninitialized stack memory in ct limit reply 2021-04-05 12:54:42 -07:00
packet net/packet: Improve the comment about LL header visibility criteria 2021-02-06 14:59:28 -08:00
phonet
psample net: psample: Fix netlink skb length with tunnel info 2021-02-25 09:49:46 -08:00
qrtr net: qrtr: Fix memory leak on qrtr_tx_wait failure 2021-03-30 13:48:29 -07:00
rds net/rds: Avoid potential use after free in rds_send_remove_from_sock 2021-04-07 14:01:24 -07:00
rfkill rfkill: revert back to old userspace API by default 2021-04-08 10:14:45 +02:00
rose rose: Fix Null pointer dereference in rose_send_frame() 2020-11-20 10:04:58 -08:00
rxrpc rxrpc: Fix dependency on IPv6 in udp tunnel config 2021-02-12 16:42:05 -08:00
sched net: sched: sch_teql: fix null-pointer dereference 2021-04-08 14:14:42 -07:00
sctp net/sctp: fix race condition in sctp_destroy_sock 2021-04-13 14:59:46 -07:00
smc net/smc: use memcpy instead of snprintf to avoid out of bounds read 2021-01-12 20:22:01 -08:00
strparser
sunrpc Miscellaneous NFSD fixes for v5.12-rc. 2021-03-16 10:22:50 -07:00
switchdev net: bridge: propagate extack through switchdev_port_attr_set 2021-02-14 17:38:11 -08:00
tipc net: tipc: Fix spelling errors in net/tipc module 2021-04-07 14:29:29 -07:00
tls net/tls: Select SOCK_RX_QUEUE_MAPPING from TLS_DEVICE 2021-02-11 19:08:06 -08:00
unix af_unix: handle idmapped mounts 2021-01-24 14:27:18 +01:00
vmw_vsock selinux: vsock: Set SID for socket returned by accept() 2021-03-19 13:46:55 -07:00
wireless nl80211: fix beacon head validation 2021-04-08 16:43:05 +02:00
x25 net: x25: Remove unimplemented X.25-over-LLC code stubs 2020-12-12 17:15:33 -08:00
xdp xsk: Fold xp_assign_dev and __xp_assign_dev 2021-01-25 23:56:33 +01:00
xfrm xfrm: xfrm_state_mtu should return at least 1280 for ipv6 2021-04-19 12:43:50 +02:00
compat.c iov_iter: transparently handle compat iovecs in import_iovec 2020-10-03 00:02:13 -04:00
devres.c
Kconfig net/sock: Add kernel config SOCK_RX_QUEUE_MAPPING 2021-02-11 19:08:06 -08:00
Makefile net: l3mdev: use obj-$(CONFIG_NET_L3_MASTER_DEV) form in net/Makefile 2021-01-27 17:03:52 -08:00
socket.c io_uring-worker.v3-2021-02-25 2021-02-27 08:29:02 -08:00
sysctl_net.c