netlink: don't handle lhs zero-length expression as concat type

expr->len 0 can appear for some data types whose size can be different
based on some external state, e.g. the conntrack src/dst addresses.

The nft type is 'invalid/0-length' in the template definition, the
size is set (on linearization) based on the network base family,
i.e. the type is changed to ip or ipv6 address at a later stage.

For delinarization, skip zero-length expression as concat type
and give expr_postprocess a chance to fix the types.

Without this change the previous patch will result in nft consuming all
available memory when trying to display e.g. a 'ct saddr' rule.

Signed-off-by: Florian Westphal <fw@strlen.de>

0 files changed, 0 insertions, 0 deletions