Phil Sutter 8711fa0c06 netfilter: nf_tables: Reject tables of unsupported family
commit f1082dd31fe461d482d69da2a8eccfeb7bf07ac2 upstream.

An nftables family is merely a hollow container, its family just a
number and such not reliant on compile-time options other than nftables
support itself. Add an artificial check so attempts at using a family
the kernel can't support fail as early as possible. This helps user
space detect kernels which lack e.g. NFPROTO_INET.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-01-15 18:25:29 +01:00
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