[RFC][PATCH v2 19/31] timers: net: Use del_timer_shutdown() before freeing timer

From: Steven Rostedt
Date: Thu Oct 27 2022 - 11:11:59 EST

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From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx>

Before a timer is freed, del_timer_shutdown() must be called.

Link: https://lore.kernel.org/all/20220407161745.7d6754b3@xxxxxxxxxxxxxxxxxx/

Cc: Jesse Brandeburg <jesse.brandeburg@xxxxxxxxx>
Cc: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Eric Dumazet <edumazet@xxxxxxxxxx>
Cc: Jakub Kicinski <kuba@xxxxxxxxxx>
Cc: Paolo Abeni <pabeni@xxxxxxxxxx>
Cc: Mirko Lindner <mlindner@xxxxxxxxxxx>
Cc: Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx>
Cc: Martin KaFai Lau <martin.lau@xxxxxxxxxx>
Cc: Alexei Starovoitov <ast@xxxxxxxxxx>
Cc: Kuniyuki Iwashima <kuniyu@xxxxxxxxxx>
Cc: Pavel Begunkov <asml.silence@xxxxxxxxx>
Cc: Menglong Dong <imagedong@xxxxxxxxxxx>
Cc: linux-usb@xxxxxxxxxxxxxxx
Cc: linux-wireless@xxxxxxxxxxxxxxx
Cc: bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: netfilter-devel@xxxxxxxxxxxxxxx
Cc: coreteam@xxxxxxxxxxxxx
Cc: lvs-devel@xxxxxxxxxxxxxxx
Cc: linux-afs@xxxxxxxxxxxxxxxxxxx
Cc: linux-nfs@xxxxxxxxxxxxxxx
Cc: tipc-discussion@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
---
drivers/net/ethernet/intel/i40e/i40e_main.c | 6 +++---
drivers/net/ethernet/marvell/sky2.c | 2 +-
drivers/net/ethernet/sun/sunvnet.c | 2 +-
drivers/net/usb/sierra_net.c | 2 +-
drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c | 2 +-
drivers/net/wireless/intersil/hostap/hostap_ap.c | 2 +-
drivers/net/wireless/marvell/mwifiex/main.c | 2 +-
drivers/net/wireless/microchip/wilc1000/hif.c | 8 ++++----
net/802/garp.c | 2 +-
net/802/mrp.c | 2 +-
net/bridge/br_multicast.c | 6 +++---
net/bridge/br_multicast_eht.c | 4 ++--
net/core/gen_estimator.c | 2 +-
net/core/sock.c | 2 +-
net/ipv4/inet_timewait_sock.c | 2 +-
net/ipv4/ipmr.c | 2 +-
net/ipv6/ip6mr.c | 2 +-
net/mac80211/mesh_pathtbl.c | 2 +-
net/netfilter/ipset/ip_set_list_set.c | 2 +-
net/netfilter/ipvs/ip_vs_lblc.c | 2 +-
net/netfilter/ipvs/ip_vs_lblcr.c | 2 +-
net/netfilter/xt_LED.c | 2 +-
net/rxrpc/conn_object.c | 2 +-
net/sched/cls_flow.c | 2 +-
net/sunrpc/svc.c | 2 +-
net/tipc/discover.c | 2 +-
net/tipc/monitor.c | 2 +-
27 files changed, 35 insertions(+), 35 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 2c07fa8ecfc8..81e9f232ca69 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -15528,7 +15528,7 @@ static int i40e_init_recovery_mode(struct i40e_pf *pf, struct i40e_hw *hw)

err_switch_setup:
i40e_reset_interrupt_capability(pf);
- del_timer_sync(&pf->service_timer);
+ del_timer_shutdown(&pf->service_timer);
i40e_shutdown_adminq(hw);
iounmap(hw->hw_addr);
pci_disable_pcie_error_reporting(pf->pdev);
@@ -16147,7 +16147,7 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
kfree(pf->vsi);
err_switch_setup:
i40e_reset_interrupt_capability(pf);
- del_timer_sync(&pf->service_timer);
+ del_timer_shutdown(&pf->service_timer);
err_mac_addr:
err_configure_lan_hmc:
(void)i40e_shutdown_lan_hmc(hw);
@@ -16209,7 +16209,7 @@ static void i40e_remove(struct pci_dev *pdev)
set_bit(__I40E_SUSPENDED, pf->state);
set_bit(__I40E_DOWN, pf->state);
if (pf->service_timer.function)
- del_timer_sync(&pf->service_timer);
+ del_timer_shutdown(&pf->service_timer);
if (pf->service_task.func)
cancel_work_sync(&pf->service_task);

diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index ab33ba1c3023..9d8a9ae64681 100644
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -5013,7 +5013,7 @@ static void sky2_remove(struct pci_dev *pdev)
if (!hw)
return;

- del_timer_sync(&hw->watchdog_timer);
+ del_timer_shutdown(&hw->watchdog_timer);
cancel_work_sync(&hw->restart_work);

for (i = hw->ports-1; i >= 0; --i)
diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c
index acda6cbd0238..f008812356ef 100644
--- a/drivers/net/ethernet/sun/sunvnet.c
+++ b/drivers/net/ethernet/sun/sunvnet.c
@@ -524,7 +524,7 @@ static void vnet_port_remove(struct vio_dev *vdev)
hlist_del_rcu(&port->hash);

synchronize_rcu();
- del_timer_sync(&port->clean_timer);
+ del_timer_shutdown(&port->clean_timer);
sunvnet_port_rm_txq_common(port);
netif_napi_del(&port->napi);
sunvnet_port_free_tx_bufs_common(port);
diff --git a/drivers/net/usb/sierra_net.c b/drivers/net/usb/sierra_net.c
index b3ae949e6f1c..75d4956fc1e6 100644
--- a/drivers/net/usb/sierra_net.c
+++ b/drivers/net/usb/sierra_net.c
@@ -759,7 +759,7 @@ static void sierra_net_unbind(struct usbnet *dev, struct usb_interface *intf)
dev_dbg(&dev->udev->dev, "%s", __func__);

/* kill the timer and work */
- del_timer_sync(&priv->sync_timer);
+ del_timer_shutdown(&priv->sync_timer);
cancel_work_sync(&priv->sierra_net_kevent);

/* tell modem we are going away */
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c b/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c
index 3237d4b528b5..dced4d0384c7 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c
@@ -371,7 +371,7 @@ void iwl_dbg_tlv_del_timers(struct iwl_trans *trans)
struct iwl_dbg_tlv_timer_node *node, *tmp;

list_for_each_entry_safe(node, tmp, timer_list, list) {
- del_timer_sync(&node->timer);
+ del_timer_shutdown(&node->timer);
list_del(&node->list);
kfree(node);
}
diff --git a/drivers/net/wireless/intersil/hostap/hostap_ap.c b/drivers/net/wireless/intersil/hostap/hostap_ap.c
index 462ccc7d7d1a..34236d793b80 100644
--- a/drivers/net/wireless/intersil/hostap/hostap_ap.c
+++ b/drivers/net/wireless/intersil/hostap/hostap_ap.c
@@ -135,7 +135,7 @@ static void ap_free_sta(struct ap_data *ap, struct sta_info *sta)

if (!sta->ap)
kfree(sta->u.sta.challenge);
- del_timer_sync(&sta->timer);
+ del_timer_shutdown(&sta->timer);
#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */

kfree(sta);
diff --git a/drivers/net/wireless/marvell/mwifiex/main.c b/drivers/net/wireless/marvell/mwifiex/main.c
index da2e6557e684..8fd4d603fe37 100644
--- a/drivers/net/wireless/marvell/mwifiex/main.c
+++ b/drivers/net/wireless/marvell/mwifiex/main.c
@@ -123,7 +123,7 @@ static int mwifiex_unregister(struct mwifiex_adapter *adapter)
if (adapter->if_ops.cleanup_if)
adapter->if_ops.cleanup_if(adapter);

- del_timer_sync(&adapter->cmd_timer);
+ del_timer_shutdown(&adapter->cmd_timer);

/* Free private structures */
for (i = 0; i < adapter->priv_num; i++) {
diff --git a/drivers/net/wireless/microchip/wilc1000/hif.c b/drivers/net/wireless/microchip/wilc1000/hif.c
index eb1d1ba3a443..7a96f9828c97 100644
--- a/drivers/net/wireless/microchip/wilc1000/hif.c
+++ b/drivers/net/wireless/microchip/wilc1000/hif.c
@@ -1520,10 +1520,10 @@ int wilc_deinit(struct wilc_vif *vif)

mutex_lock(&vif->wilc->deinit_lock);

- del_timer_sync(&hif_drv->scan_timer);
- del_timer_sync(&hif_drv->connect_timer);
- del_timer_sync(&vif->periodic_rssi);
- del_timer_sync(&hif_drv->remain_on_ch_timer);
+ del_timer_shutdown(&hif_drv->scan_timer);
+ del_timer_shutdown(&hif_drv->connect_timer);
+ del_timer_shutdown(&vif->periodic_rssi);
+ del_timer_shutdown(&hif_drv->remain_on_ch_timer);

if (hif_drv->usr_scan_req.scan_result) {
hif_drv->usr_scan_req.scan_result(SCAN_EVENT_ABORTED, NULL,
diff --git a/net/802/garp.c b/net/802/garp.c
index fc9eb02a912f..610753f269ca 100644
--- a/net/802/garp.c
+++ b/net/802/garp.c
@@ -618,7 +618,7 @@ void garp_uninit_applicant(struct net_device *dev, struct garp_application *appl

/* Delete timer and generate a final TRANSMIT_PDU event to flush out
* all pending messages before the applicant is gone. */
- del_timer_sync(&app->join_timer);
+ del_timer_shutdown(&app->join_timer);

spin_lock_bh(&app->lock);
garp_gid_event(app, GARP_EVENT_TRANSMIT_PDU);
diff --git a/net/802/mrp.c b/net/802/mrp.c
index 155f74d8b14f..72d4680ce170 100644
--- a/net/802/mrp.c
+++ b/net/802/mrp.c
@@ -904,7 +904,7 @@ void mrp_uninit_applicant(struct net_device *dev, struct mrp_application *appl)
* all pending messages before the applicant is gone.
*/
del_timer_sync(&app->join_timer);
- del_timer_sync(&app->periodic_timer);
+ del_timer_shutdown(&app->periodic_timer);

spin_lock_bh(&app->lock);
mrp_mad_event(app, MRP_EVENT_TX);
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index db4f2641d1cd..0724c45049e4 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -605,7 +605,7 @@ static void br_multicast_destroy_mdb_entry(struct net_bridge_mcast_gc *gc)
WARN_ON(!hlist_unhashed(&mp->mdb_node));
WARN_ON(mp->ports);

- del_timer_sync(&mp->timer);
+ del_timer_shutdown(&mp->timer);
kfree_rcu(mp, rcu);
}

@@ -646,7 +646,7 @@ static void br_multicast_destroy_group_src(struct net_bridge_mcast_gc *gc)
src = container_of(gc, struct net_bridge_group_src, mcast_gc);
WARN_ON(!hlist_unhashed(&src->node));

- del_timer_sync(&src->timer);
+ del_timer_shutdown(&src->timer);
kfree_rcu(src, rcu);
}

@@ -671,7 +671,7 @@ static void br_multicast_destroy_port_group(struct net_bridge_mcast_gc *gc)
WARN_ON(!hlist_empty(&pg->src_list));

del_timer_sync(&pg->rexmit_timer);
- del_timer_sync(&pg->timer);
+ del_timer_shutdown(&pg->timer);
kfree_rcu(pg, rcu);
}

diff --git a/net/bridge/br_multicast_eht.c b/net/bridge/br_multicast_eht.c
index f91c071d1608..78dcfba2b16c 100644
--- a/net/bridge/br_multicast_eht.c
+++ b/net/bridge/br_multicast_eht.c
@@ -142,7 +142,7 @@ static void br_multicast_destroy_eht_set_entry(struct net_bridge_mcast_gc *gc)
set_h = container_of(gc, struct net_bridge_group_eht_set_entry, mcast_gc);
WARN_ON(!RB_EMPTY_NODE(&set_h->rb_node));

- del_timer_sync(&set_h->timer);
+ del_timer_shutdown(&set_h->timer);
kfree(set_h);
}

@@ -154,7 +154,7 @@ static void br_multicast_destroy_eht_set(struct net_bridge_mcast_gc *gc)
WARN_ON(!RB_EMPTY_NODE(&eht_set->rb_node));
WARN_ON(!RB_EMPTY_ROOT(&eht_set->entry_tree));

- del_timer_sync(&eht_set->timer);
+ del_timer_shutdown(&eht_set->timer);
kfree(eht_set);
}

diff --git a/net/core/gen_estimator.c b/net/core/gen_estimator.c
index 4fcbdd71c59f..834287d0675e 100644
--- a/net/core/gen_estimator.c
+++ b/net/core/gen_estimator.c
@@ -208,7 +208,7 @@ void gen_kill_estimator(struct net_rate_estimator __rcu **rate_est)

est = xchg((__force struct net_rate_estimator **)rate_est, NULL);
if (est) {
- del_timer_sync(&est->timer);
+ del_timer_shutdown(&est->timer);
kfree_rcu(est, rcu);
}
}
diff --git a/net/core/sock.c b/net/core/sock.c
index a3ba0358c77c..10cc84379d75 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -3352,7 +3352,7 @@ EXPORT_SYMBOL(sk_stop_timer);

void sk_stop_timer_sync(struct sock *sk, struct timer_list *timer)
{
- if (del_timer_sync(timer))
+ if (del_timer_shutdown(timer))
__sock_put(sk);
}
EXPORT_SYMBOL(sk_stop_timer_sync);
diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c
index 66fc940f9521..549a4c1990ea 100644
--- a/net/ipv4/inet_timewait_sock.c
+++ b/net/ipv4/inet_timewait_sock.c
@@ -208,7 +208,7 @@ EXPORT_SYMBOL_GPL(inet_twsk_alloc);
*/
void inet_twsk_deschedule_put(struct inet_timewait_sock *tw)
{
- if (del_timer_sync(&tw->tw_timer))
+ if (del_timer_shutdown(&tw->tw_timer))
inet_twsk_kill(tw);
inet_twsk_put(tw);
}
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index e04544ac4b45..459a80325247 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -412,7 +412,7 @@ static struct mr_table *ipmr_new_table(struct net *net, u32 id)

static void ipmr_free_table(struct mr_table *mrt)
{
- del_timer_sync(&mrt->ipmr_expire_timer);
+ del_timer_shutdown(&mrt->ipmr_expire_timer);
mroute_clean_tables(mrt, MRT_FLUSH_VIFS | MRT_FLUSH_VIFS_STATIC |
MRT_FLUSH_MFC | MRT_FLUSH_MFC_STATIC);
rhltable_destroy(&mrt->mfc_hash);
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index facdc78a43e5..9bd993046ebe 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -392,7 +392,7 @@ static struct mr_table *ip6mr_new_table(struct net *net, u32 id)

static void ip6mr_free_table(struct mr_table *mrt)
{
- del_timer_sync(&mrt->ipmr_expire_timer);
+ del_timer_shutdown(&mrt->ipmr_expire_timer);
mroute_clean_tables(mrt, MRT6_FLUSH_MIFS | MRT6_FLUSH_MIFS_STATIC |
MRT6_FLUSH_MFC | MRT6_FLUSH_MFC_STATIC);
rhltable_destroy(&mrt->mfc_hash);
diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index acc1c299f1ae..d4c7c67a4dee 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -512,7 +512,7 @@ static void mesh_path_free_rcu(struct mesh_table *tbl,
mpath->flags |= MESH_PATH_RESOLVING | MESH_PATH_DELETED;
mesh_gate_del(tbl, mpath);
spin_unlock_bh(&mpath->state_lock);
- del_timer_sync(&mpath->timer);
+ del_timer_shutdown(&mpath->timer);
atomic_dec(&sdata->u.mesh.mpaths);
atomic_dec(&tbl->entries);
mesh_path_flush_pending(mpath);
diff --git a/net/netfilter/ipset/ip_set_list_set.c b/net/netfilter/ipset/ip_set_list_set.c
index 5a67f7966574..6a8b0e80385b 100644
--- a/net/netfilter/ipset/ip_set_list_set.c
+++ b/net/netfilter/ipset/ip_set_list_set.c
@@ -427,7 +427,7 @@ list_set_destroy(struct ip_set *set)
struct set_elem *e, *n;

if (SET_WITH_TIMEOUT(set))
- del_timer_sync(&map->gc);
+ del_timer_shutdown(&map->gc);

list_for_each_entry_safe(e, n, &map->members, list) {
list_del(&e->list);
diff --git a/net/netfilter/ipvs/ip_vs_lblc.c b/net/netfilter/ipvs/ip_vs_lblc.c
index 7ac7473e3804..1f08ba927d0e 100644
--- a/net/netfilter/ipvs/ip_vs_lblc.c
+++ b/net/netfilter/ipvs/ip_vs_lblc.c
@@ -384,7 +384,7 @@ static void ip_vs_lblc_done_svc(struct ip_vs_service *svc)
struct ip_vs_lblc_table *tbl = svc->sched_data;

/* remove periodic timer */
- del_timer_sync(&tbl->periodic_timer);
+ del_timer_shutdown(&tbl->periodic_timer);

/* got to clean up table entries here */
ip_vs_lblc_flush(svc);
diff --git a/net/netfilter/ipvs/ip_vs_lblcr.c b/net/netfilter/ipvs/ip_vs_lblcr.c
index 77c323c36a88..f939a00826d6 100644
--- a/net/netfilter/ipvs/ip_vs_lblcr.c
+++ b/net/netfilter/ipvs/ip_vs_lblcr.c
@@ -547,7 +547,7 @@ static void ip_vs_lblcr_done_svc(struct ip_vs_service *svc)
struct ip_vs_lblcr_table *tbl = svc->sched_data;

/* remove periodic timer */
- del_timer_sync(&tbl->periodic_timer);
+ del_timer_shutdown(&tbl->periodic_timer);

/* got to clean up table entries here */
ip_vs_lblcr_flush(svc);
diff --git a/net/netfilter/xt_LED.c b/net/netfilter/xt_LED.c
index 0371c387b0d1..0093fa1d07c6 100644
--- a/net/netfilter/xt_LED.c
+++ b/net/netfilter/xt_LED.c
@@ -166,7 +166,7 @@ static void led_tg_destroy(const struct xt_tgdtor_param *par)

list_del(&ledinternal->list);

- del_timer_sync(&ledinternal->timer);
+ del_timer_shutdown(&ledinternal->timer);

led_trigger_unregister(&ledinternal->netfilter_led_trigger);

diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c
index 22089e37e97f..3f353f1f38ee 100644
--- a/net/rxrpc/conn_object.c
+++ b/net/rxrpc/conn_object.c
@@ -358,7 +358,7 @@ static void rxrpc_destroy_connection(struct rcu_head *rcu)

_net("DESTROY CONN %d", conn->debug_id);

- del_timer_sync(&conn->timer);
+ del_timer_shutdown(&conn->timer);
rxrpc_purge_queue(&conn->rx_queue);

conn->security->clear(conn);
diff --git a/net/sched/cls_flow.c b/net/sched/cls_flow.c
index 014cd3de7b5d..b23fbd2d4b5a 100644
--- a/net/sched/cls_flow.c
+++ b/net/sched/cls_flow.c
@@ -367,7 +367,7 @@ static const struct nla_policy flow_policy[TCA_FLOW_MAX + 1] = {

static void __flow_destroy_filter(struct flow_filter *f)
{
- del_timer_sync(&f->perturb_timer);
+ del_timer_shutdown(&f->perturb_timer);
tcf_exts_destroy(&f->exts);
tcf_em_tree_destroy(&f->ematches);
tcf_exts_put_net(&f->exts);
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 149171774bc6..b07bc9f9b3bd 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -567,7 +567,7 @@ svc_destroy(struct kref *ref)
struct svc_serv *serv = container_of(ref, struct svc_serv, sv_refcnt);

dprintk("svc: svc_destroy(%s)\n", serv->sv_program->pg_name);
- del_timer_sync(&serv->sv_temptimer);
+ del_timer_shutdown(&serv->sv_temptimer);

/*
* The last user is gone and thus all sockets have to be destroyed to
diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index da69e1abf68f..09d69670506e 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -385,7 +385,7 @@ int tipc_disc_create(struct net *net, struct tipc_bearer *b,
*/
void tipc_disc_delete(struct tipc_discoverer *d)
{
- del_timer_sync(&d->timer);
+ del_timer_shutdown(&d->timer);
kfree_skb(d->skb);
kfree(d);
}
diff --git a/net/tipc/monitor.c b/net/tipc/monitor.c
index 9618e4429f0f..cedc4a468315 100644
--- a/net/tipc/monitor.c
+++ b/net/tipc/monitor.c
@@ -700,7 +700,7 @@ void tipc_mon_delete(struct net *net, int bearer_id)
}
mon->self = NULL;
write_unlock_bh(&mon->lock);
- del_timer_sync(&mon->timer);
+ del_timer_shutdown(&mon->timer);
kfree(self->domain);
kfree(self);
kfree(mon);
--
2.35.1

Next message: Steven Rostedt: "[RFC][PATCH v2 31/31] timers: Expand DEBUG_OBJECTS_TIMER to check if it ever was used"
Previous message: Steven Rostedt: "[RFC][PATCH v2 30/31] timers: x86/mce: Use __init_timer() for resetting timers"
In reply to: Steven Rostedt: "[RFC][PATCH v2 30/31] timers: x86/mce: Use __init_timer() for resetting timers"
Next in thread: Steven Rostedt: "Re: [RFC][PATCH v2 19/31] timers: net: Use del_timer_shutdown() before freeing timer"
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