From: Ariel Levkovich lariel@nvidia.com
[ Upstream commit fb91702b743dec78d6507c53a2dec8a8883f509d ]
Fix current behavior of skipping template allocation in case the ct action is in zone 0.
Skipping the allocation may cause the datapath ct code to ignore the entire ct action with all its attributes (commit, nat) in case the ct action in zone 0 was preceded by a ct clear action.
The ct clear action sets the ct_state to untracked and resets the skb->_nfct pointer. Under these conditions and without an allocated ct template, the skb->_nfct pointer will remain NULL which will cause the tc ct action handler to exit without handling commit and nat actions, if such exist.
For example, the following rule in OVS dp: recirc_id(0x2),ct_state(+new-est-rel-rpl+trk),ct_label(0/0x1), \ in_port(eth0),actions:ct_clear,ct(commit,nat(src=10.11.0.12)), \ recirc(0x37a)
Will result in act_ct skipping the commit and nat actions in zone 0.
The change removes the skipping of template allocation for zone 0 and treats it the same as any other zone.
Fixes: b57dc7c13ea9 ("net/sched: Introduce action ct") Signed-off-by: Ariel Levkovich lariel@nvidia.com Acked-by: Marcelo Ricardo Leitner marcelo.leitner@gmail.com Link: https://lore.kernel.org/r/20210526170110.54864-1-lariel@nvidia.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/sched/act_ct.c | 3 --- 1 file changed, 3 deletions(-)
diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c index 371fd64638d2..ba7f57cb41c3 100644 --- a/net/sched/act_ct.c +++ b/net/sched/act_ct.c @@ -1205,9 +1205,6 @@ static int tcf_ct_fill_params(struct net *net, sizeof(p->zone)); }
- if (p->zone == NF_CT_DEFAULT_ZONE_ID) - return 0; - nf_ct_zone_init(&zone, p->zone, NF_CT_DEFAULT_ZONE_DIR, 0); tmpl = nf_ct_tmpl_alloc(net, &zone, GFP_KERNEL); if (!tmpl) {