[PATCH 4.14 66/71] netfilter: nf_tables: fix flush after rule deletion in the same batch

[Greg Kroah-Hartman]

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pablo Neira Ayuso <pa...@netfilter.org>

commit 23b7ca4f745f21c2b9cfcb67fdd33733b3ae7e66 upstream.

Flush after rule deletion bogusly hits -ENOENT. Skip rules that have
been already from nft_delrule_by_chain() which is always called from the
flush path.

Fixes: cf9dc09d0949 ("netfilter: nf_tables: fix missing rules flushing per 
table")
Reported-by: Phil Sutter <p...@nwl.cc>
Acked-by: Phil Sutter <p...@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pa...@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 net/netfilter/nf_tables_api.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -304,6 +304,9 @@ static int nft_delrule_by_chain(struct n
        int err;
 
        list_for_each_entry(rule, &ctx->chain->rules, list) {
+               if (!nft_is_active_next(ctx->net, rule))
+                       continue;
+
                err = nft_delrule(ctx, rule);
                if (err < 0)
                        return err;