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(parent: fa25e81) | patch
subflow: explicitly check for plain tcp rsk
authorPaolo Abeni <pabeni@redhat.com>
Thu, 23 Jul 2020 11:02:34 +0000 (13:02 +0200)
committerDavid S. Miller <davem@davemloft.net>
Thu, 23 Jul 2020 18:47:25 +0000 (11:47 -0700)
commitb7514694ed2952684a1e4fc44d83682140fd8cef
tree468b94431292db85adcd8e07cf1381e89e0b2d59tree
parentfa25e815d963115eb06036a8f6a50e724bc259e2commit | diff
subflow: explicitly check for plain tcp rsk

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>
net/mptcp/subflow.c diff | blob | history
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