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The newsk returned by sk_clone_lock should hold a get_net()
reference if, and only if, the parent is not a kernel socket
(making this similar to sk_alloc()).
E.g,. for the SYN_RECV path, tcp_v4_syn_recv_sock->..inet_csk_clone_lock
sets up the syn_recv newsk from sk_clone_lock. When the parent (listen)
socket is a kernel socket (defined in sk_alloc() as having
sk_net_refcnt == 0), then the newsk should also have a 0 sk_net_refcnt
and should not hold a get_net() reference.
Fixes: 26abe14379 ("net: Modify sk_alloc to not reference count the
netns of kernel sockets.")
Acked-by: Eric Dumazet <[email protected]>
Cc: Eric W. Biederman <[email protected]>
Signed-off-by: Sowmini Varadhan <[email protected]>
Signed-off-by: David S. Miller <[email protected]>