mptcp: fix locking for setsockopt corner-case

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We need to call the __mptcp_nmpc_socket(), and later subflow socket
access under the msk socket lock, or e.g. a racing connect() could
change the socket status under the hood, with unexpected results.

Fixes: 54635bd047 ("mptcp: add TCP_FASTOPEN_CONNECT socket option")
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Paolo Abeni 2023-02-07 14:04:14 +01:00 • committed by David S. Miller

parent d4e85922e3

commit 21e4356968

1 changed files with 9 additions and 2 deletions

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net/mptcp/sockopt.c

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