* [PATCH net-next 1/2] netfilter: nfnetlink: add netns refcount tracker to struct nfulnl_instance
@ 2021-12-13 16:39 Eric Dumazet
2021-12-13 16:40 ` [PATCH net-next 2/2] netfilter: nf_nat_masquerade: add netns refcount tracker to masq_dev_work Eric Dumazet
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Eric Dumazet @ 2021-12-13 16:39 UTC (permalink / raw)
To: Pablo Neira Ayuso, Jozsef Kadlecsik, Florian Westphal
Cc: netfilter-devel, netdev, Eric Dumazet, Eric Dumazet
From: Eric Dumazet <edumazet@google.com>
If compiled with CONFIG_NET_NS_REFCNT_TRACKER=y,
using put_net_track() in nfulnl_instance_free_rcu()
and get_net_track() in instance_create()
might help us finding netns refcount imbalances.
Signed-off-by: Eric Dumazet <edumazet@google.com>
---
net/netfilter/nfnetlink_log.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index 691ef4cffdd907cf09d3a7e680ebe83ea5562ee0..7a3a91fc7ffaaf7c632692949a990f5867173e5c 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -66,6 +66,7 @@ struct nfulnl_instance {
struct sk_buff *skb; /* pre-allocatd skb */
struct timer_list timer;
struct net *net;
+ netns_tracker ns_tracker;
struct user_namespace *peer_user_ns; /* User namespace of the peer process */
u32 peer_portid; /* PORTID of the peer process */
@@ -140,7 +141,7 @@ static void nfulnl_instance_free_rcu(struct rcu_head *head)
struct nfulnl_instance *inst =
container_of(head, struct nfulnl_instance, rcu);
- put_net(inst->net);
+ put_net_track(inst->net, &inst->ns_tracker);
kfree(inst);
module_put(THIS_MODULE);
}
@@ -187,7 +188,7 @@ instance_create(struct net *net, u_int16_t group_num,
timer_setup(&inst->timer, nfulnl_timer, 0);
- inst->net = get_net(net);
+ inst->net = get_net_track(net, &inst->ns_tracker, GFP_ATOMIC);
inst->peer_user_ns = user_ns;
inst->peer_portid = portid;
inst->group_num = group_num;
--
2.34.1.173.g76aa8bc2d0-goog
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH net-next 2/2] netfilter: nf_nat_masquerade: add netns refcount tracker to masq_dev_work
2021-12-13 16:39 [PATCH net-next 1/2] netfilter: nfnetlink: add netns refcount tracker to struct nfulnl_instance Eric Dumazet
@ 2021-12-13 16:40 ` Eric Dumazet
2021-12-16 11:50 ` Pablo Neira Ayuso
2021-12-15 23:03 ` [PATCH net-next 1/2] netfilter: nfnetlink: add netns refcount tracker to struct nfulnl_instance Pablo Neira Ayuso
2021-12-16 11:50 ` Pablo Neira Ayuso
2 siblings, 1 reply; 6+ messages in thread
From: Eric Dumazet @ 2021-12-13 16:40 UTC (permalink / raw)
To: Pablo Neira Ayuso, Jozsef Kadlecsik, Florian Westphal
Cc: netfilter-devel, netdev, Eric Dumazet, Eric Dumazet
From: Eric Dumazet <edumazet@google.com>
If compiled with CONFIG_NET_NS_REFCNT_TRACKER=y,
using put_net_track() in iterate_cleanup_work()
and netns_tracker_alloc() in nf_nat_masq_schedule()
might help us finding netns refcount imbalances.
Signed-off-by: Eric Dumazet <edumazet@google.com>
---
net/netfilter/nf_nat_masquerade.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/netfilter/nf_nat_masquerade.c b/net/netfilter/nf_nat_masquerade.c
index acd73f717a0883d791fc351851a98bac4144705f..e32fac374608576d6237f80b1bff558e9453585a 100644
--- a/net/netfilter/nf_nat_masquerade.c
+++ b/net/netfilter/nf_nat_masquerade.c
@@ -12,6 +12,7 @@
struct masq_dev_work {
struct work_struct work;
struct net *net;
+ netns_tracker ns_tracker;
union nf_inet_addr addr;
int ifindex;
int (*iter)(struct nf_conn *i, void *data);
@@ -82,7 +83,7 @@ static void iterate_cleanup_work(struct work_struct *work)
nf_ct_iterate_cleanup_net(w->net, w->iter, (void *)w, 0, 0);
- put_net(w->net);
+ put_net_track(w->net, &w->ns_tracker);
kfree(w);
atomic_dec(&masq_worker_count);
module_put(THIS_MODULE);
@@ -119,6 +120,7 @@ static void nf_nat_masq_schedule(struct net *net, union nf_inet_addr *addr,
INIT_WORK(&w->work, iterate_cleanup_work);
w->ifindex = ifindex;
w->net = net;
+ netns_tracker_alloc(net, &w->ns_tracker, gfp_flags);
w->iter = iter;
if (addr)
w->addr = *addr;
--
2.34.1.173.g76aa8bc2d0-goog
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH net-next 1/2] netfilter: nfnetlink: add netns refcount tracker to struct nfulnl_instance
2021-12-13 16:39 [PATCH net-next 1/2] netfilter: nfnetlink: add netns refcount tracker to struct nfulnl_instance Eric Dumazet
2021-12-13 16:40 ` [PATCH net-next 2/2] netfilter: nf_nat_masquerade: add netns refcount tracker to masq_dev_work Eric Dumazet
@ 2021-12-15 23:03 ` Pablo Neira Ayuso
2021-12-15 23:04 ` Pablo Neira Ayuso
2021-12-16 11:50 ` Pablo Neira Ayuso
2 siblings, 1 reply; 6+ messages in thread
From: Pablo Neira Ayuso @ 2021-12-15 23:03 UTC (permalink / raw)
To: Eric Dumazet
Cc: Jozsef Kadlecsik, Florian Westphal, netfilter-devel, netdev,
Eric Dumazet
On Mon, Dec 13, 2021 at 08:39:59AM -0800, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@google.com>
>
> If compiled with CONFIG_NET_NS_REFCNT_TRACKER=y,
> using put_net_track() in nfulnl_instance_free_rcu()
> and get_net_track() in instance_create()
> might help us finding netns refcount imbalances.
Applied to nf-next, thanks
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH net-next 1/2] netfilter: nfnetlink: add netns refcount tracker to struct nfulnl_instance
2021-12-15 23:03 ` [PATCH net-next 1/2] netfilter: nfnetlink: add netns refcount tracker to struct nfulnl_instance Pablo Neira Ayuso
@ 2021-12-15 23:04 ` Pablo Neira Ayuso
0 siblings, 0 replies; 6+ messages in thread
From: Pablo Neira Ayuso @ 2021-12-15 23:04 UTC (permalink / raw)
To: Eric Dumazet
Cc: Jozsef Kadlecsik, Florian Westphal, netfilter-devel, netdev,
Eric Dumazet
On Thu, Dec 16, 2021 at 12:03:27AM +0100, Pablo Neira Ayuso wrote:
> On Mon, Dec 13, 2021 at 08:39:59AM -0800, Eric Dumazet wrote:
> > From: Eric Dumazet <edumazet@google.com>
> >
> > If compiled with CONFIG_NET_NS_REFCNT_TRACKER=y,
> > using put_net_track() in nfulnl_instance_free_rcu()
> > and get_net_track() in instance_create()
> > might help us finding netns refcount imbalances.
>
> Applied to nf-next, thanks
Hm, actually I cannot, nf-next is still behing net-next and it does
not have this symbols.
I'll send a pull request and pick up these patches asap.
Thanks.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH net-next 1/2] netfilter: nfnetlink: add netns refcount tracker to struct nfulnl_instance
2021-12-13 16:39 [PATCH net-next 1/2] netfilter: nfnetlink: add netns refcount tracker to struct nfulnl_instance Eric Dumazet
2021-12-13 16:40 ` [PATCH net-next 2/2] netfilter: nf_nat_masquerade: add netns refcount tracker to masq_dev_work Eric Dumazet
2021-12-15 23:03 ` [PATCH net-next 1/2] netfilter: nfnetlink: add netns refcount tracker to struct nfulnl_instance Pablo Neira Ayuso
@ 2021-12-16 11:50 ` Pablo Neira Ayuso
2 siblings, 0 replies; 6+ messages in thread
From: Pablo Neira Ayuso @ 2021-12-16 11:50 UTC (permalink / raw)
To: Eric Dumazet
Cc: Jozsef Kadlecsik, Florian Westphal, netfilter-devel, netdev,
Eric Dumazet
On Mon, Dec 13, 2021 at 08:39:59AM -0800, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@google.com>
>
> If compiled with CONFIG_NET_NS_REFCNT_TRACKER=y,
> using put_net_track() in nfulnl_instance_free_rcu()
> and get_net_track() in instance_create()
> might help us finding netns refcount imbalances.
Now applied to nf-next, thanks
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH net-next 2/2] netfilter: nf_nat_masquerade: add netns refcount tracker to masq_dev_work
2021-12-13 16:40 ` [PATCH net-next 2/2] netfilter: nf_nat_masquerade: add netns refcount tracker to masq_dev_work Eric Dumazet
@ 2021-12-16 11:50 ` Pablo Neira Ayuso
0 siblings, 0 replies; 6+ messages in thread
From: Pablo Neira Ayuso @ 2021-12-16 11:50 UTC (permalink / raw)
To: Eric Dumazet
Cc: Jozsef Kadlecsik, Florian Westphal, netfilter-devel, netdev,
Eric Dumazet
On Mon, Dec 13, 2021 at 08:40:00AM -0800, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@google.com>
>
> If compiled with CONFIG_NET_NS_REFCNT_TRACKER=y,
> using put_net_track() in iterate_cleanup_work()
> and netns_tracker_alloc() in nf_nat_masq_schedule()
> might help us finding netns refcount imbalances.
Also applied, thanks
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2021-12-16 11:50 UTC | newest]
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2021-12-13 16:39 [PATCH net-next 1/2] netfilter: nfnetlink: add netns refcount tracker to struct nfulnl_instance Eric Dumazet
2021-12-13 16:40 ` [PATCH net-next 2/2] netfilter: nf_nat_masquerade: add netns refcount tracker to masq_dev_work Eric Dumazet
2021-12-16 11:50 ` Pablo Neira Ayuso
2021-12-15 23:03 ` [PATCH net-next 1/2] netfilter: nfnetlink: add netns refcount tracker to struct nfulnl_instance Pablo Neira Ayuso
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