INFO: task kworker/1:18:8889 blocked for more than 143 seconds.
      Not tainted 6.3.0-rc2-syzkaller-00050-g9c1bec9c0b08 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:18    state:D stack:24224 pid:8889  ppid:2      flags:0x00004000
Workqueue: ipv6_addrconf addrconf_verify_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5304 [inline]
 __schedule+0xc91/0x5770 kernel/sched/core.c:6622
 schedule+0xde/0x1a0 kernel/sched/core.c:6698
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
 addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4629
 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390
 worker_thread+0x669/0x1090 kernel/workqueue.c:2537
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: task kworker/0:3:17357 blocked for more than 146 seconds.
      Not tainted 6.3.0-rc2-syzkaller-00050-g9c1bec9c0b08 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:3     state:D stack:25648 pid:17357 ppid:2      flags:0x00004000
Workqueue: ipv6_addrconf addrconf_verify_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5304 [inline]
 __schedule+0xc91/0x5770 kernel/sched/core.c:6622
 schedule+0xde/0x1a0 kernel/sched/core.c:6698
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
 addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4629
 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390
 worker_thread+0x669/0x1090 kernel/workqueue.c:2537
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>

Showing all locks held in the system:
2 locks held by init/1:
 #0: ffff8880265a0fa8 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline]
 #0: ffff8880265a0fa8 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x1552/0x2450 mm/filemap.c:3289
 #1: 
ffffffff8c8e74e0
 (
fs_reclaim
){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4789 [inline]
){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4814 [inline]
){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x75f/0x2170 mm/page_alloc.c:5219
1 lock held by kthreadd/2:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8c794b70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8c794870 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
 #0: ffffffff8c7956c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6495
3 locks held by kswapd1/82:
2 locks held by syslogd/4423:
 #0: ffff8880265a0fa8 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline]
 #0: ffff8880265a0fa8 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x1552/0x2450 mm/filemap.c:3289
 #1: ffffffff8c8e74e0 (fs_reclaim
){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4789 [inline]
){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4814 [inline]
){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x75f/0x2170 mm/page_alloc.c:5219
2 locks held by udevd/4441:
 #0: 
ffff8880265a0fa8
 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline]
 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x1552/0x2450 mm/filemap.c:3289
 #1: ffffffff8c8e74e0 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4789 [inline]
 #1: ffffffff8c8e74e0 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4814 [inline]
 #1: ffffffff8c8e74e0 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x75f/0x2170 mm/page_alloc.c:5219