subflow: explicitly check for plain tcp rsk

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When syncookie are in use, the TCP stack may feed into
subflow_syn_recv_sock() plain TCP request sockets. We can't
access mptcp_subflow_request_sock-specific fields on such
sockets. Explicitly check the rsk ops to do safe accesses.

Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Tested-by: Christoph Paasch <cpaasch@apple.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Paolo Abeni 2020-07-23 13:02:34 +02:00 • committed by David S. Miller

parent fa25e815d9

commit b7514694ed

1 changed files with 1 additions and 1 deletions

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net/mptcp/subflow.c

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