netfilter: fix nf_conntrack_l4proto_register()
While doing __rcu annotations work on net/netfilter I found following bug. On some arches, it is possible we publish a table while its content is not yet committed to memory, and lockless reader can dereference wild pointer. Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NPatrick McHardy <kaber@trash.net>
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