mptcp: syncookies: remember the request backup flag

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Instead of using an uninitialised bit when copying the info in
subflow_ulp_clone().

To fix this, no need to extend the join_entry structure: backup is
coming from struct mptcp_subflow_request_sock, only one bit. Do the same
here by using one bit for both.

Fixes: efd340bf3d ("mptcp: distinguish rcv vs sent backup flag in 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-v2-3-df1de70348b6@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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

parent 29f641951b

commit b76c0e28b3

1 changed files with 4 additions and 1 deletions

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net/mptcp/syncookies.c

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