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linux/net
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Davide Caratti d1fefedc1a mptcp: don't account accept() of non-MPC client as fallback to TCP 
commit 7a1b3490f4 upstream.

Current MPTCP servers increment MPTcpExtMPCapableFallbackACK when they
accept non-MPC connections. As reported by Christoph, this is "surprising"
because the counter might become greater than MPTcpExtMPCapableSYNRX.

MPTcpExtMPCapableFallbackACK counter's name suggests it should only be
incremented when a connection was seen using MPTCP options, then a
fallback to TCP has been done. Let's do that by incrementing it when
the subflow context of an inbound MPC connection attempt is dropped.
Also, update mptcp_connect.sh kselftest, to ensure that the
above MIB does not increment in case a pure TCP client connects to a
MPTCP server.

Fixes: fc518953bc ("mptcp: add and use MIB counter infrastructure")
Cc: stable@vger.kernel.org
Reported-by: Christoph Paasch <cpaasch@apple.com>
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/449
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://lore.kernel.org/r/20240329-upstream-net-20240329-fallback-mib-v1-1-324a8981da48@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2024-04-10 16:28:34 +02:00
..
6lowpan net: 6lowpan: constify lowpan_nhc structures 2022-06-09 21:53:28 +02:00
9p 9p: Fix read/write debug statements to report server reply 2024-04-10 16:28:30 +02:00
802 mrp: introduce active flags to prevent UAF when applicant uninit 2022-12-31 13:33:02 +01:00
8021q vlan: skip nested type that is not IFLA_VLAN_QOS_MAPPING 2024-01-31 16:17:04 -08:00
appletalk appletalk: Fix Use-After-Free in atalk_ioctl 2023-12-20 17:00:19 +01:00
atm atm: Fix Use-After-Free in do_vcc_ioctl 2023-12-20 17:00:17 +01:00
ax25 ax25: move from strlcpy with unused retval to strscpy 2022-08-22 17:55:50 -07:00
batman-adv net: vlan: introduce skb_vlan_eth_hdr() 2023-12-20 17:00:16 +01:00
bluetooth Bluetooth: Fix TOCTOU in HCI debugfs implementation 2024-04-10 16:28:24 +02:00
bpf Revert "bpf, test_run: fix &xdp_frame misplacement for LIVE_FRAMES" 2023-03-17 08:50:32 +01:00
bpfilter uaccess: remove CONFIG_SET_FS 2022-02-25 09:36:06 +01:00
bridge netfilter: validate user input for expected length 2024-04-10 16:28:25 +02:00
caif net: caif: Fix use-after-free in cfusbl_device_notify() 2023-03-17 08:50:24 +01:00
can can: j1939: Fix UAF in j1939_sk_match_filter during setsockopt(SO_J1939_FILTER) 2024-02-23 09:12:47 +01:00
ceph libceph: use kernel_connect() 2023-10-19 23:08:56 +02:00
core gro: fix ownership transfer 2024-04-10 16:28:26 +02:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-11 12:08:17 +02:00
dccp dccp/tcp: Call security_inet_conn_request() after setting IPv6 addresses. 2023-11-20 11:52:16 +01:00
devlink devlink: remove reload failed checks in params get/set callbacks 2023-09-23 11:11:01 +02:00
dns_resolver keys, dns: Fix size check of V1 server-list header 2024-01-25 15:27:38 -08:00
dsa net: dsa: sja1105: always enable the send_meta options 2023-07-19 16:22:06 +02:00
ethernet net: gro: skb_gro_header helper function 2022-08-25 10:33:21 +02:00
ethtool ethtool: netlink: Add missing ethnl_ops_begin/complete 2024-01-25 15:27:51 -08:00
hsr hsr: Handle failures in module init 2024-03-26 18:21:00 -04:00
ieee802154 net: ieee802154: fix error return code in dgram_bind() 2022-10-07 09:29:17 +02:00
ife net: sched: ife: fix potential use-after-free 2024-01-01 12:38:56 +00:00
ipv4 tcp: Fix bind() regression for v6-only wildcard and v4(-mapped-v6) non-wildcard addresses. 2024-04-10 16:28:29 +02:00
ipv6 udp: do not transition UDP GRO fraglist partial checksums to unnecessary 2024-04-10 16:28:27 +02:00
iucv net/iucv: fix the allocation size of iucv_path_table array 2024-03-26 18:20:25 -04:00
kcm net: kcm: fix incorrect parameter validation in the kcm_getsockopt) function 2024-03-26 18:20:42 -04:00
key net: af_key: fix sadb_x_filter validation 2023-08-23 17:52:32 +02:00
l2tp l2tp: fix incorrect parameter validation in the pppol2tp_getsockopt() function 2024-03-26 18:20:42 -04:00
l3mdev l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper_dev_get_rcu 2022-04-15 14:27:24 -07:00
lapb net: lapb: Use list_for_each_entry() to simplify code in lapb_iface.c 2021-06-08 16:31:25 -07:00
llc llc: call sock_orphan() at release time 2024-02-05 20:13:01 +00:00
mac80211 wifi: mac80211: check/clear fast rx for non-4addr sta VLAN changes 2024-04-03 15:19:48 +02:00
mac802154 mac802154: fix llsec key resources release in mac802154_llsec_key_del 2024-04-03 15:19:31 +02:00
mctp net: mctp: copy skb ext data when fragmenting 2024-03-26 18:20:37 -04:00
mpls net: mpls: fix stale pointer if allocation fails during device rename 2023-02-22 12:59:53 +01:00
mptcp mptcp: don't account accept() of non-MPC client as fallback to TCP 2024-04-10 16:28:34 +02:00
ncsi net/ncsi: Fix netlink major/minor version numbers 2024-01-25 15:27:24 -08:00
netfilter netfilter: nf_tables: Fix potential data-race in __nft_flowtable_type_get() 2024-04-10 16:28:25 +02:00
netlabel calipso: fix memory leak in netlbl_calipso_add_pass() 2024-01-25 15:27:20 -08:00
netlink netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter 2024-03-06 14:45:06 +00:00
netrom netrom: Fix data-races around sysctl_net_busy_read 2024-03-15 10:48:18 -04:00
nfc nfc: nci: Fix uninit-value in nci_dev_up and nci_ntf_packet 2024-04-10 16:28:21 +02:00
nsh net: nsh: Use correct mac_offset to unwind gso skb in nsh_gso_segment() 2023-05-24 17:32:45 +01:00
openvswitch net: openvswitch: limit the number of recursions from action sets 2024-02-23 09:12:30 +01:00
packet packet: annotate data-races around ignore_outgoing 2024-03-26 18:20:59 -04:00
phonet phonet/pep: fix racy skb_queue_empty() use 2024-03-01 13:26:38 +01:00
psample psample: Require 'CAP_NET_ADMIN' when joining "packets" group 2023-12-13 18:39:11 +01:00
qrtr net: qrtr: ns: Return 0 if server port is not present 2024-01-20 11:50:09 +01:00
rds net/rds: fix possible cp null dereference 2024-04-10 16:28:25 +02:00
rfkill net: rfkill: gpio: set GPIO direction 2024-01-01 12:39:04 +00:00
rose net/rose: fix races in rose_kill_by_device() 2024-01-01 12:38:57 +00:00
rxrpc rxrpc: Fix response to PING RESPONSE ACKs to a dead call 2024-02-16 19:06:27 +01:00
sched net/sched: fix lockdep splat in qdisc_tree_reduce_backlog() 2024-04-10 16:28:26 +02:00
sctp sctp: fix busy polling 2024-01-25 15:27:30 -08:00
smc net/smc: disable SEID on non-s390 archs where virtual ISM may be used 2024-02-05 20:12:54 +00:00
strparser strparser: pad sk_skb_cb to avoid straddling cachelines 2022-07-08 18:38:44 -07:00
sunrpc net: sunrpc: Fix an off by one in rpc_sockaddr2uaddr() 2024-03-26 18:20:55 -04:00
switchdev net: bridge: switchdev: Skip MDB replays of deferred events on offload 2024-03-01 13:26:35 +01:00
tipc tipc: Check the bearer type before calling tipc_udp_nl_bearer_add() 2024-02-16 19:06:27 +01:00
tls tls: get psock ref after taking rxlock to avoid leak 2024-04-10 16:28:22 +02:00
unix af_unix: Annotate data-race of gc_in_progress in wait_for_unix_gc(). 2024-03-26 18:20:31 -04:00
vmw_vsock vsock/virtio: fix packet delivery to tap device 2024-04-10 16:28:25 +02:00
wireless wifi: nl80211: reject iftype change with mesh ID change 2024-03-06 14:45:10 +00:00
x25 net/x25: fix incorrect parameter validation in the x25_getsockopt() function 2024-03-26 18:20:42 -04:00
xdp xsk: Skip polling event check for unbound socket 2023-12-13 18:39:08 +01:00
xfrm xfrm: Avoid clang fortify warning in copy_to_user_tmpl() 2024-04-03 15:19:40 +02:00
compat.c use less confusing names for iov_iter direction initializers 2023-02-09 11:28:04 +01:00
devres.c net: devres: Correct a grammatical error 2021-06-11 12:55:28 -07:00
Kconfig Remove DECnet support from kernel 2022-08-22 14:26:30 +01:00
Kconfig.debug net: make NET_(DEV|NS)_REFCNT_TRACKER depend on NET 2022-09-20 14:23:56 -07:00
Makefile devlink: move code to a dedicated directory 2023-08-30 16:11:00 +02:00
socket.c splice, net: Add a splice_eof op to file-ops and socket-ops 2024-01-10 17:10:27 +01:00
sysctl_net.c sections: move and rename core_kernel_data() to is_kernel_core_data() 2021-11-09 10:02:50 -08:00