mptcp: fix shutdown vs fallback race

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If the MPTCP socket shutdown happens before a fallback
to TCP, and all the pending data have been already spooled,
we never close the TCP connection.

Address the issue explicitly checking for critical condition
at fallback time.

Fixes: 1e39e5a32a ("mptcp: infinite mapping sending")
Fixes: 0348c690ed ("mptcp: add the fallback check")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Paolo Abeni 2022-06-27 18:02:38 -07:00 • committed by Jakub Kicinski

parent 76a13b3157

commit d51991e2e3

4 changed files with 19 additions and 6 deletions

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2

net/mptcp/options.c

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2

net/mptcp/protocol.c

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19

net/mptcp/protocol.h

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2

net/mptcp/subflow.c

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