linux_dsm_epyc7002/net/mptcp
Paolo Abeni b198f77a36 mptcp: always parse mptcp options for MPC reqsk
[ Upstream commit 06f9a435b3aa12f4de6da91f11fdce8ce7b46205 ]

In subflow_syn_recv_sock() we currently skip options parsing
for OoO packet, given that such packets may not carry the relevant
MPC option.

If the peer generates an MPC+data TSO packet and some of the early
segments are lost or get reorder, we server will ignore the peer key,
causing transient, unexpected fallback to TCP.

The solution is always parsing the incoming MPTCP options, and
do the fallback only for in-order packets. This actually cleans
the existing code a bit.

Fixes: d22f4988ff ("mptcp: process MP_CAPABLE data option")
Reported-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-06-10 13:39:16 +02:00
..
crypto_test.c mptcp: move crypto test to KUNIT 2020-06-26 16:21:39 -07:00
crypto.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-08-05 20:13:21 -07:00
ctrl.c mptcp: enable JOIN requests even if cookies are in use 2020-07-31 16:55:32 -07:00
diag.c mptcp: allow dumping subflow context to userspace 2020-03-29 22:14:48 -07:00
Kconfig mptcp: depends on IPV6 but not as a module 2020-10-21 08:05:40 -07:00
Makefile mptcp: enable JOIN requests even if cookies are in use 2020-07-31 16:55:32 -07:00
mib.c mptcp: print new line in mptcp_seq_show() if mptcp isn't in use 2020-12-07 17:45:29 -08:00
mib.h mptcp: add RM_ADDR related mibs 2020-09-24 19:58:34 -07:00
mptcp_diag.c mptcp: add MPTCP socket diag interface 2020-07-09 12:38:41 -07:00
options.c mptcp: drop unconditional pr_warn on bad opt 2021-06-03 09:00:39 +02:00
pm_netlink.c mptcp: Constify mptcp_pm_ops 2020-10-04 21:13:36 -07:00
pm.c mptcp: ADD_ADDRs with echo bit are smaller 2020-10-03 17:36:37 -07:00
protocol.c mptcp: fix data stream corruption 2021-06-03 09:00:39 +02:00
protocol.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-10-15 12:43:21 -07:00
subflow.c mptcp: always parse mptcp options for MPC reqsk 2021-06-10 13:39:16 +02:00
syncookies.c mptcp: fix syncookie build error on UP 2020-08-01 11:52:55 -07:00
token_test.c mptcp: introduce token KUNIT self-tests 2020-06-26 16:21:39 -07:00
token.c mptcp: token: fix unititialized variable 2020-11-03 13:08:30 -08:00