netlink_linearize: skip set element expression in map statement key

This fix is similar to 22d201010919 ("netlink_linearize: skip set element
expression in set statement key") to fix map statement.

netlink_gen_map_stmt() relies on the map key, that is expressed as a set
element. Use the set element key instead to skip the set element wrap,
otherwise get_register() abort execution:

  nft: netlink_linearize.c:650: netlink_gen_expr: Assertion `dreg < ctx->reg_low' failed.

This includes JSON support to make this feature complete and it updates
tests/shell to cover for this support.

Reported-by: Luci Stanescu <luci@cnix.ro>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

0 files changed, 0 insertions, 0 deletions