netfilter: nf_tables: fix flush after rule deletion in the same batch

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 <phil@nwl.cc>
Acked-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 5a92f23..4893f24 100644 (file)
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -313,6 +313,9 @@ static int nft_delrule_by_chain(struct nft_ctx *ctx)
        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;