Paolo Abeni 938126995e mptcp: reset fallback status gracefully at disconnect() time ...

commit da9b2fc7b7 upstream.

mptcp_disconnect() clears the fallback bit unconditionally, without
touching the associated flags.

The bit clear is safe, as no fallback operation can race with that --
all subflow are already in TCP_CLOSE status thanks to the previous
FASTCLOSE -- but we need to consistently reset all the fallback related
status.

Also acquire the relevant lock, to avoid fouling static analyzers.

Fixes: b29fcfb54c ("mptcp: full disconnect implementation")
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20250714-net-mptcp-fallback-races-v1-3-391aff963322@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2025-07-24 08:56:24 +02:00

..

bpf.c

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crypto_test.c

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crypto.c

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ctrl.c

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diag.c

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fastopen.c

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Kconfig

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Makefile

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mib.c

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mib.h

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mptcp_diag.c

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mptcp_pm_gen.c

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mptcp_pm_gen.h

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options.c

mptcp: make fallback action and fallback decision atomic

2025-07-24 08:56:23 +02:00

pm_netlink.c

mptcp: fix 'scheduling while atomic' in mptcp_pm_nl_append_new_local_addr

2025-03-13 13:01:55 +01:00

pm_userspace.c

mptcp: pm: userspace: flags: clearer msg if no remote addr

2025-05-29 11:02:56 +02:00

pm.c

mptcp: plug races between subflow fail and subflow creation

2025-07-24 08:56:24 +02:00

protocol.c

mptcp: reset fallback status gracefully at disconnect() time

2025-07-24 08:56:24 +02:00

protocol.h

mptcp: plug races between subflow fail and subflow creation

2025-07-24 08:56:24 +02:00

sched.c

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sockopt.c

mptcp: sockopt: fix getting freebind & transparent

2025-04-20 10:15:38 +02:00

subflow.c

mptcp: plug races between subflow fail and subflow creation

2025-07-24 08:56:24 +02:00

syncookies.c

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token_test.c

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token.c

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