nft: keep original cache in case of ERESTART

Phil Sutter says:

"The problem is that data in h->obj_list potentially sits in cache, too.
At least rules have to be there so insert with index works correctly. If
the cache is flushed before regenerating the batch, use-after-free
occurs which crashes the program."

This patch keeps around the original cache until we have refreshed the
batch.

Fixes: 862818ac3a0de ("xtables: add and use nft_build_cache")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

0 files changed, 0 insertions, 0 deletions