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netfilter: nf_nat_masquerade: add netns refcount tracker to masq_dev_work 

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>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Eric Dumazet 2021-12-13 08:40:00 -08:00 committed by Pablo Neira Ayuso
parent a9382d9389
commit fc0d026a2f
1 changed files with 3 additions and 1 deletions
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4
net/netfilter/nf_nat_masquerade.c
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@ -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;