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netfilter: nftables: skip hook overlap logic if flowtable is stale 

[ Upstream commit 86fe2c19eec4728fd9a42ba18f3b47f0d5f9fd7c ]

If the flowtable has been previously removed in this batch, skip the
hook overlap checks. This fixes spurious EEXIST errors when removing and
adding the flowtable in the same batch.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pablo Neira Ayuso 2021-03-17 21:19:57 +01:00 committed by Greg Kroah-Hartman
parent b0c795f4cc
commit 8a57256e05
1 changed files with 3 additions and 0 deletions
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3
net/netfilter/nf_tables_api.c
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@ -6573,6 +6573,9 @@ static int nft_register_flowtable_net_hooks(struct net *net,
list_for_each_entry(hook, hook_list, list) {
list_for_each_entry(ft, &table->flowtables, list) {
if (!nft_is_active_next(net, ft))
continue;
list_for_each_entry(hook2, &ft->hook_list, list) {
if (hook->ops.dev == hook2->ops.dev &&
hook->ops.pf == hook2->ops.pf) {