When running 'nft flush ruleset' while no rules exist, we will increment
the generation counter and announce a new genid to userspace, yet
nothing had changed in the first place.
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
---
net/netfilter/nf_tables_api.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index dcd9cb68d826..1904e081853c 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -6536,6 +6536,11 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
struct nft_chain *chain;
struct nft_table *table;
+ if (list_empty(&net->nft.commit_list)) {
+ mutex_unlock(&net->nft.commit_mutex);
+ return 0;
+ }
+
/* 0. Validate ruleset, otherwise roll back for error reporting. */
if (nf_tables_validate(net) < 0)
return -EAGAIN;
--
2.19.2
