INFO: task kworker/u8:0:12 blocked for more than 441 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:0    state:D stack:0     pid:12    tgid:12    ppid:2      task_flags:0x4208160 flags:0x00000010
Workqueue: events_unbound linkwatch_event
Call trace:
 __switch_to+0x210/0x520 arch/arm64/kernel/process.c:775 (T)
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0xfa0/0x351c kernel/sched/core.c:7284
 __schedule_loop kernel/sched/core.c:7361 [inline]
 schedule+0xcc/0x288 kernel/sched/core.c:7376
 schedule_preempt_disabled+0x18/0x30 kernel/sched/core.c:7433
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x7d8/0x153c kernel/locking/mutex.c:821
 mutex_lock_nested+0x24/0x34 kernel/locking/mutex.c:874
 rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80
 linkwatch_event+0x64/0xc0 net/core/link_watch.c:313
 process_one_work+0x830/0x1c00 kernel/workqueue.c:3396
 process_scheduled_works kernel/workqueue.c:3479 [inline]
 worker_thread+0x42c/0xc90 kernel/workqueue.c:3560
 kthread+0x2ec/0x384 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854
INFO: task kworker/R-ipv6_:2130 blocked for more than 420 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/R-ipv6_ state:D stack:0     pid:2130  tgid:2130  ppid:2      task_flags:0x4208060 flags:0x00000010
Workqueue: ipv6_addrconf addrconf_verify_work
Call trace:
 __switch_to+0x210/0x520 arch/arm64/kernel/process.c:775 (T)
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0xfa0/0x351c kernel/sched/core.c:7284
 __schedule_loop kernel/sched/core.c:7361 [inline]
 schedule+0xcc/0x288 kernel/sched/core.c:7376
 schedule_preempt_disabled+0x18/0x30 kernel/sched/core.c:7433
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x7d8/0x153c kernel/locking/mutex.c:821
 mutex_lock_nested+0x24/0x34 kernel/locking/mutex.c:874
 rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80
 rtnl_net_lock include/linux/rtnetlink.h:134 [inline]
 addrconf_verify_work+0x18/0x38 net/ipv6/addrconf.c:4770
 process_one_work+0x830/0x1c00 kernel/workqueue.c:3396
 process_scheduled_works kernel/workqueue.c:3479 [inline]
 rescuer_thread+0x660/0xf80 kernel/workqueue.c:3703
 kthread+0x2ec/0x384 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854

Showing all locks held in the system:
locks held by kworker/u8:0/12: 3, on CPU#1:
 #0: ffff00000e04c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x12ec/0x1c00 kernel/workqueue.c:3371
 #1: ffff80008dc77c70 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x780/0x1c00 kernel/workqueue.c:3370
 #2: ffff800088f212a0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80
locks held by pr/ttyAMA-1/30: 2, last CPU#0:
 #0: ffff8000878b3a38 (console_srcu){....}-{0:0}, at: __srcu_read_lock_nmisafe include/linux/srcu.h:151 [inline]
 #0: ffff8000878b3a38 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:438 [inline]
 #0: ffff8000878b3a38 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x34/0x68 kernel/printk/printk.c:291
 #1: ffff80008d9d3438 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_rcu_head_unqueue kernel/rcu/rcu.h:257 [inline]
 #1: ffff80008d9d3438 (&obj_hash[i].lock){-.-.}-{2:2}, at: rcu_do_batch kernel/rcu/tree.c:2642 [inline]
 #1: ffff80008d9d3438 (&obj_hash[i].lock){-.-.}-{2:2}, at: rcu_core+0x5d4/0x16f4 kernel/rcu/tree.c:2919
locks held by khungtaskd/32: 1, last CPU#1:
 #0: ffff8000879a1e20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:847 [inline]
 #0: ffff8000879a1e20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x40/0x190 kernel/locking/lockdep.c:6871
locks held by kworker/u8:3/113: 3, last CPU#1:
 #0: ffff00000e04c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x12ec/0x1c00 kernel/workqueue.c:3371
 #1: ffff80008e307c70 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0x780/0x1c00 kernel/workqueue.c:3370
 #2: ffff0000173ca258 (&devlink->lock_key){+.+.}-{4:4}, at: devl_trylock+0x18/0x30 net/devlink/core.c:314
locks held by kworker/u8:5/1132: 3, last CPU#1:
 #0: ffff00000e04c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x12ec/0x1c00 kernel/workqueue.c:3371
 #1: ffff80008f577c70 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0x780/0x1c00 kernel/workqueue.c:3370
 #2: ffff00001a356258 (&devlink->lock_key#3){+.+.}-{4:4}, at: devl_trylock+0x18/0x30 net/devlink/core.c:314
locks held by kworker/u8:7/1601: 2, last CPU#1:
 #0: ffff00001767c140 ((wq_completion)wg-kex-wg2#7){+.+.}-{0:0}, at: process_one_work+0x12ec/0x1c00 kernel/workqueue.c:3371
 #1: ffff80008fbe7c70 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_one_work+0x780/0x1c00 kernel/workqueue.c:3370
locks held by kworker/u8:8/1612: 2, on CPU#1:
 #0: ffff00000e04c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x12ec/0x1c00 kernel/workqueue.c:3371
 #1: ffff80008fd27c70 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x780/0x1c00 kernel/workqueue.c:3370
locks held by kworker/R-ipv6_/2130: 3, on CPU#1:
 #0: ffff00000fd76140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x12ec/0x1c00 kernel/workqueue.c:3371
 #1: ffff8000a03d7bf0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x780/0x1c00 kernel/workqueue.c:3370
 #2: ffff800088f212a0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80
locks held by dhcpcd/3231: 1, last CPU#0:
 #0: ffff800087b742b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:304 [inline]
 #0: ffff800087b742b0 (remove_cache_srcu){.+.+}-{0:0}, at: kasan_quarantine_reduce+0x6c/0x1ac mm/kasan/quarantine.c:259
locks held by crond/3312: 1, last CPU#0:
 #0: ffff800087b742b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:304 [inline]
 #0: ffff800087b742b0 (remove_cache_srcu){.+.+}-{0:0}, at: kasan_quarantine_reduce+0x6c/0x1ac mm/kasan/quarantine.c:259
locks held by getty/3327: 2, on CPU#0:
 #0: ffff0000194c30a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80008dc7b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x420/0xec0 drivers/tty/n_tty.c:2211
locks held by dhcpcd/3328: 1, last CPU#0:
 #0: ffff800087b742b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:304 [inline]
 #0: ffff800087b742b0 (remove_cache_srcu){.+.+}-{0:0}, at: kasan_quarantine_reduce+0x6c/0x1ac mm/kasan/quarantine.c:259
locks held by sshd-session/3381: 1, last CPU#1:
 #0: ffff000018876a60 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1713 [inline]
 #0: ffff000018876a60 (sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_recvmsg+0xdc/0x40c net/ipv4/tcp.c:2943
locks held by syz-executor/3382: 1, last CPU#1:
 #0: ffff800087b742b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:304 [inline]
 #0: ffff800087b742b0 (remove_cache_srcu){.+.+}-{0:0}, at: kasan_quarantine_reduce+0x6c/0x1ac mm/kasan/quarantine.c:259
locks held by syz-executor/4007: 4, last CPU#0:
 #0: ffff00002252a460 (sb_writers#6){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
 #0: ffff00002252a460 (sb_writers#6){.+.+}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline]
 #0: ffff00002252a460 (sb_writers#6){.+.+}-{0:0}, at: sb_start_write include/linux/fs/super.h:125 [inline]
 #0: ffff00002252a460 (sb_writers#6){.+.+}-{0:0}, at: mnt_want_write+0x3c/0xb0 fs/namespace.c:494