From: Paolo Abeni <pab...@redhat.com>
Date: Tue, 4 Aug 2020 18:31:06 +0200
> Nicolas reported the following oops:
...
> on some unconventional configuration.
>
> The MPTCP protocol is trying to create a subflow for an
> unaccepted server socket. That is allowed by the RFC, even
> if subflow creation will likely fail.
> Unaccepted sockets have still a NULL sk_socket field,
> avoid the issue by failing earlier.
>
> Reported-and-tested-by: Nicolas Rybowski <nicolas.rybow...@tessares.net>
> Fixes: 7d14b0d2b9b3 ("mptcp: set correct vfs info for subflows")
> Signed-off-by: Paolo Abeni <pab...@redhat.com>
Applied and queued up for v5.7+ -stable, thank you.
