------------[ cut here ]------------
WARNING: CPU: 1 PID: 8048 at net/l2tp/l2tp_core.c:1881 l2tp_exit_net+0x170/0x178 net/l2tp/l2tp_core.c:1881
Modules linked in:
CPU: 1 UID: 0 PID: 8048 Comm: kworker/u8:16 Not tainted 6.12.0-syzkaller-g7b1d1d4cfac0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: netns cleanup_net
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : l2tp_exit_net+0x170/0x178 net/l2tp/l2tp_core.c:1881
lr : idr_is_empty include/linux/idr.h:162 [inline]
lr : l2tp_exit_net+0x168/0x178 net/l2tp/l2tp_core.c:1881
sp : ffff8000a2f979d0
x29: ffff8000a2f979d0 x28: ffff8000a2f97a60 x27: 00000000ffffffff
x26: 1ffff0001253da08 x25: ffff8000929ed020 x24: ffff8000927e72c0
x23: ffff0000d91b8000 x22: dfff800000000000 x21: 0000000004000000
x20: ffff0000d96af888 x19: ffff0000d96af840 x18: ffff8000a2f97380
x17: 0000000000039ed4 x16: ffff800080585eb0 x15: 0000000000000001
x14: ffff80008f8d05e8 x13: dfff800000000000 x12: 00000000143d50fe
x11: 000000000230d77c x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000d724dac0 x7 : ffff80008a98f0f8 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002
x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000002
Call trace:
 l2tp_exit_net+0x170/0x178 net/l2tp/l2tp_core.c:1881 (P)
 idr_is_empty include/linux/idr.h:162 [inline] (L)
 l2tp_exit_net+0x168/0x178 net/l2tp/l2tp_core.c:1881 (L)
 ops_exit_list net/core/net_namespace.c:173 [inline]
 cleanup_net+0x640/0x9b4 net/core/net_namespace.c:626
 process_one_work+0x7bc/0x1600 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x97c/0xeec kernel/workqueue.c:3391
 kthread+0x288/0x310 kernel/kthread.c:389
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862
irq event stamp: 587506
hardirqs last  enabled at (587505): [<ffff800080acaff0>] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234
hardirqs last disabled at (587506): [<ffff80008b54386c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:488
softirqs last  enabled at (587498): [<ffff80008a99cfb4>] l2tp_ip_exit_net+0xcc/0x134 net/l2tp/l2tp_ip.c:682
softirqs last disabled at (587496): [<ffff80008a99cf24>] l2tp_ip_exit_net+0x3c/0x134 net/l2tp/l2tp_ip.c:679
---[ end trace 0000000000000000 ]---
hsr_slave_0: left promiscuous mode
hsr_slave_1: left promiscuous mode
batman_adv: batadv0: Interface deactivated: batadv_slave_0
batman_adv: batadv0: Removing interface: batadv_slave_0
batman_adv: batadv0: Interface deactivated: batadv_slave_1
batman_adv: batadv0: Removing interface: batadv_slave_1
veth1_macvtap: left promiscuous mode
veth0_macvtap: left promiscuous mode
veth1_vlan: left promiscuous mode
veth0_vlan: left promiscuous mode
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
IPVS: stop unused estimator thread 0...