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

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>
This commit is contained in:
Pablo Neira Ayuso 2021-03-17 21:19:57 +01:00
parent 740b486a8d
commit 86fe2c19ee
1 changed files with 3 additions and 0 deletions
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3
net/netfilter/nf_tables_api.c
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@ -6783,6 +6783,9 @@ 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) {