syzbot

BUG: scheduling while atomic: kworker/u4:3/427/0x00000002
Modules linked in:
Preemption disabled at:
[<ffffffff81dcf115>] spin_lock include/linux/spinlock.h:363 [inline]
[<ffffffff81dcf115>] kernfs_put+0x325/0x520 fs/kernfs/dir.c:544
CPU: 1 PID: 427 Comm: kworker/u4:3 Tainted: G        W         5.15.149-syzkaller-00490-g5d96939590c0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 dump_stack+0x15/0x17 lib/dump_stack.c:113
 __schedule_bug+0x195/0x260 kernel/sched/core.c:5707
 schedule_debug kernel/sched/core.c:5734 [inline]
 __schedule+0xd19/0x1590 kernel/sched/core.c:6402
 schedule+0x11f/0x1e0 kernel/sched/core.c:6595
 synchronize_rcu_expedited+0x49d/0x600 kernel/rcu/tree_exp.h:946
 synchronize_net+0x2d/0x40 net/core/dev.c:11009
 ipv6_mc_down+0x9b/0x360 net/ipv6/mcast.c:2725
 ipv6_mc_destroy_dev+0x2b/0x620 net/ipv6/mcast.c:2792
 addrconf_ifdown+0x1652/0x1ae0 net/ipv6/addrconf.c:3924
 addrconf_notify+0x37d/0xdd0
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:391
 call_netdevice_notifiers_info net/core/dev.c:2025 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2037 [inline]
 call_netdevice_notifiers net/core/dev.c:2051 [inline]
 unregister_netdevice_many+0xe0a/0x17c0 net/core/dev.c:11105
 ip6_tnl_exit_batch_net+0x3c4/0x410 net/ipv6/ip6_tunnel.c:2307
 ops_exit_list net/core/net_namespace.c:174 [inline]
 cleanup_net+0x6ce/0xc00 net/core/net_namespace.c:596
 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
 kthread+0x421/0x510 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
device veth1_macvtap left promiscuous mode
device veth0_vlan left promiscuous mode
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
device veth0_vlan left promiscuous mode
device veth1_macvtap left promiscuous mode
device veth0_vlan left promiscuous mode