mptcp: subflow: no need to copy thmac during ulp_clone

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'thmac' is not used after that point.

Indeed, subflow_ulp_clone() is called when the request on the passive
side is over, so when the truncated HMAC is no longer needed.

Note that in case of SYN cookies, thmac will not be initialised. So
better to remove it to avoid a warning from debug tools like KMSAN for
reading uninitialised data.

Fixes: f296234c98 ("mptcp: Add handling of incoming MP_JOIN requests")
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/20260908-net-mptcp-misc-fixes-7-3-rc1-v2-2-df1de70348b6@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Matthieu Baerts (NGI0) 2026-09-08 16:07:07 +02:00 • committed by Jakub Kicinski

parent e2ab913f68

commit 29f641951b

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net/mptcp/subflow.c

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