netfilter: nftables: avoid potential overflows on 32bit arches

netfilter: nftables: avoid potential overflows on 32bit arches

Origin: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit?id=3fda454f909cda927a02a75e48ef5ee49497f120

commit 6c8774a94e6ad26f29ef103c8671f55c255c6201 upstream.

User space could ask for very large hash tables, we need to make sure
our size computations wont overflow.

nf_tables_newset() needs to double check the u64 size
will fit into size_t field.

Fixes: 0ed6389c483d ("netfilter: nf_tables: rename set implementations")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Gbp-Pq: Topic bugfix/all
Gbp-Pq: Name netfilter-nftables-avoid-potential-overflows-on-32bi.patch