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Matthieu Baerts (NGI0) 86cade051b selftests: mptcp: join: validate C-flag + def limit 
commit 008385efd0 upstream.

The previous commit adds an exception for the C-flag case. The
'mptcp_join.sh' selftest is extended to validate this case.

In this subtest, there is a typical CDN deployment with a client where
MPTCP endpoints have been 'automatically' configured:

- the server set net.mptcp.allow_join_initial_addr_port=0

- the client has multiple 'subflow' endpoints, and the default limits:
  not accepting ADD_ADDRs.

Without the parent patch, the client is not able to establish new
subflows using its 'subflow' endpoints. The parent commit fixes that.

The 'Fixes' tag here below is the same as the one from the previous
commit: this patch here is not fixing anything wrong in the selftests,
but it validates the previous fix for an issue introduced by this commit
ID.

Fixes: df377be387 ("mptcp: add deny_join_id0 in mptcp_options_received")
Cc: stable@vger.kernel.org
Reviewed-by: Geliang Tang <geliang@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20250925-net-next-mptcp-c-flag-laminar-v1-2-ad126cc47c6b@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-10-19 16:33:57 +02:00
..
crypto/chacha20-s390 tools/testing/crypto: Use vzalloc instead of vmalloc+memset 2022-07-05 14:46:36 +02:00
cxl cxl/test: Improve init-order fidelity relative to real-world systems 2024-10-25 16:07:04 -05:00
fault-injection failcmd: make failcmd.sh executable 2024-09-01 20:43:32 -07:00
ktest ktest.pl: Prevent recursion of default variable options 2025-08-20 18:30:29 +02:00
kunit kunit: qemu_configs: Disable faulting tests on 32-bit SPARC 2025-07-10 16:04:55 +02:00
memblock memblock: updates for 6.12-rc1 2024-09-25 11:35:19 -07:00
nvdimm nvdimm: ndtest: Return -ENOMEM if devm_kcalloc() fails in ndtest_probe() 2025-10-15 12:00:23 +02:00
radix-tree maple_tree: add regression test for spanning store bug 2024-10-17 08:35:10 -07:00
scatterlist tools/testing/scatterlist: add missing defines 2022-01-30 09:56:58 +02:00
selftests selftests: mptcp: join: validate C-flag + def limit 2025-10-19 16:33:57 +02:00
shared test suite: use %zu to print size_t 2025-04-25 10:47:43 +02:00
vma mm/hugetlb: unshare page tables during VMA split, not before 2025-06-27 11:11:40 +01:00
vsock vsock/test: Fix occasional failure in SIOCOUTQ tests 2025-05-22 14:29:41 +02:00