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l2tp: fix some l2tp_tunnel_find() issues in l2tp_netlink
Since l2tp_tunnel_find() doesn't take a reference on the tunnel it
returns, its users are almost guaranteed to be racy.
This series defines l2tp_tunnel_get() which can be used as a safe
replacement, and converts some of l2tp_tunnel_find() users in the
l2tp_netlink module.
Other users often combine this issue with other more or less subtle
races. They will be fixed incrementally in followup series.
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Signed-off-by: David S. Miller <davem@davemloft.net>
projects / kernel.git / commit