INFO: task syz-executor.5:17570 blocked for more than 143 seconds.
      Not tainted 6.2.0-rc3-next-20230110-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:28008 pid:17570 ppid:5121   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
 schedule+0xde/0x1b0 kernel/sched/core.c:6695
 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
 __down_read_common kernel/locking/rwsem.c:1260 [inline]
 __down_read kernel/locking/rwsem.c:1269 [inline]
 down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
 mmap_read_lock include/linux/mmap_lock.h:117 [inline]
 do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
 handle_page_fault arch/x86/mm/fault.c:1519 [inline]
 exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7fc795c276c6
RSP: 002b:00007ffd19f41608 EFLAGS: 00010287
RAX: 0000001b32e22000 RBX: 00007fc795dac018 RCX: 0000001b32e20000
RDX: 0000001b32e22004 RSI: 0000001b32e217d8 RDI: 0000000037ae72f4
RBP: 0000000037ae72f4 R08: 0000001b33220000 R09: 0000000037ae72f8
R10: 00007ffd19fb6090 R11: 000000000002e142 R12: 00007fc795da0000
R13: 0000000000000001 R14: 000000000000375e R15: ffffffff89b86612
 </TASK>

Showing all threads with locks held in the system:
task:rcu_tasks_kthre state:I stack:29040 pid:12    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
 schedule+0xde/0x1b0 kernel/sched/core.c:6695
 rcu_tasks_one_gp+0x484/0xcd0 kernel/rcu/tasks.h:517
 rcu_tasks_kthread+0x77/0xa0 kernel/rcu/tasks.h:555
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8c793470 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xcd0 kernel/rcu/tasks.h:510
task:rcu_tasks_trace state:I stack:29208 pid:13    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
 schedule+0xde/0x1b0 kernel/sched/core.c:6695
 rcu_tasks_one_gp+0x484/0xcd0 kernel/rcu/tasks.h:517
 rcu_tasks_kthread+0x77/0xa0 kernel/rcu/tasks.h:555
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8c793170 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xcd0 kernel/rcu/tasks.h:510
task:getty           state:S stack:23336 pid:4754  ppid:1      flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
 schedule+0xde/0x1b0 kernel/sched/core.c:6695
 schedule_timeout+0x1e1/0x2a0 kernel/time/timer.c:2143
 wait_woken+0x197/0x200 kernel/sched/wait.c:463
 n_tty_read+0x1055/0x13e0 drivers/tty/n_tty.c:2243
 iterate_tty_read drivers/tty/tty_io.c:852 [inline]
 tty_read+0x30e/0x5a0 drivers/tty/tty_io.c:927
 call_read_iter include/linux/fs.h:1846 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x681/0x930 fs/read_write.c:470
 ksys_read+0x12b/0x250 fs/read_write.c:613
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc7089038fe
RSP: 002b:00007ffc165f7198 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000559793a98910 RCX: 00007fc7089038fe
RDX: 0000000000000001 RSI: 00007ffc165f71b0 RDI: 0000000000000000
RBP: 0000559793a98970 R08: 0000000000000007 R09: 0000559793a99cd0
R10: 0000000000000063 R11: 0000000000000246 R12: 0000559793a989ac
R13: 00007ffc165f71b0 R14: 0000000000000000 R15: 0000559793a989ac
 </TASK>
2 locks held by getty/4754:
 #0: ffff888149fec098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
task:kworker/0:3     state:D stack:23656 pid:5164  ppid:2      flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
 schedule+0xde/0x1b0 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6754
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747
 addrconf_dad_work+0xa7/0x12d0 net/ipv6/addrconf.c:4083
 process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293
 worker_thread+0x669/0x1090 kernel/workqueue.c:2440
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
3 locks held by kworker/0:3/5164:
 #0: ffff888149fb7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888149fb7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888149fb7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888149fb7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff888149fb7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff888149fb7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x86d/0x1750 kernel/workqueue.c:2264
 #1: ffffc9000551fda8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1750 kernel/workqueue.c:2268
 #2: ffffffff8e0c71a8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xa7/0x12d0 net/ipv6/addrconf.c:4083
task:kworker/u4:10   state:R  running task     stack:25776 pid:5318  ppid:2      flags:0x00004000
Workqueue: phy10 ieee80211_iface_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
 </TASK>
3 locks held by kworker/u4:10/5318:
task:kworker/0:1     state:D stack:23736 pid:12339 ppid:2      flags:0x00004000
Workqueue: rcu_gp wait_rcu_exp_gp
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
 schedule+0xde/0x1b0 kernel/sched/core.c:6695
 schedule_timeout+0x14e/0x2a0 kernel/time/timer.c:2167
 synchronize_rcu_expedited_wait_once kernel/rcu/tree_exp.h:572 [inline]
 synchronize_rcu_expedited_wait kernel/rcu/tree_exp.h:624 [inline]
 rcu_exp_wait_wake+0x2ab/0x1220 kernel/rcu/tree_exp.h:693
 process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293
 worker_thread+0x669/0x1090 kernel/workqueue.c:2440
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
2 locks held by kworker/0:1/12339:
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x86d/0x1750 kernel/workqueue.c:2264
 #1: 
ffffc9000610fda8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1750 kernel/workqueue.c:2268
task:kworker/0:14    state:D
 stack:26912 pid:16194 ppid:2      flags:0x00004000
Workqueue: events fqdir_free_fn
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
 schedule+0xde/0x1b0 kernel/sched/core.c:6695
 schedule_timeout+0x1e1/0x2a0 kernel/time/timer.c:2143
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
 rcu_barrier+0x37f/0x6d0 kernel/rcu/tree.c:4012
 fqdir_free_fn+0x32/0x160 net/ipv4/inet_fragment.c:164
 process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293
 worker_thread+0x669/0x1090 kernel/workqueue.c:2440
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
3 locks held by kworker/0:14/16194:
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}
, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
, at: set_work_data kernel/workqueue.c:636 [inline]
, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
, at: process_one_work+0x86d/0x1750 kernel/workqueue.c:2264
 #1: 
ffffc90014f9fda8
 (fqdir_free_work){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1750 kernel/workqueue.c:2268
 #2: 
ffffffff8c79f000 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x6d0 kernel/rcu/tree.c:3944
task:syz-executor.5  state:D stack:28008 pid:17570 ppid:5121   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
 schedule+0xde/0x1b0 kernel/sched/core.c:6695
 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
 __down_read_common kernel/locking/rwsem.c:1260 [inline]
 __down_read kernel/locking/rwsem.c:1269 [inline]
 down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
 mmap_read_lock include/linux/mmap_lock.h:117 [inline]
 do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
 handle_page_fault arch/x86/mm/fault.c:1519 [inline]
 exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7fc795c276c6
RSP: 002b:00007ffd19f41608 EFLAGS: 00010287

RAX: 0000001b32e22000 RBX: 00007fc795dac018 RCX: 0000001b32e20000
RDX: 0000001b32e22004 RSI: 0000001b32e217d8 RDI: 0000000037ae72f4
RBP: 0000000037ae72f4 R08: 0000001b33220000 R09: 0000000037ae72f8
R10: 00007ffd19fb6090 R11: 000000000002e142 R12: 00007fc795da0000
R13: 0000000000000001 R14: 000000000000375e R15: ffffffff89b86612
 </TASK>
1 lock held by syz-executor.5/17570:
 #0: ffff88807ebdc998 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
 #0: ffff88807ebdc998 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
task:syz-executor.5  state:R
  running task    
 stack:26944 pid:17572 ppid:5121   flags:0x00004006
Call Trace:
 <TASK>
 </TASK>
1 lock held by syz-executor.5/17572:
task:kworker/u4:9    state:D
 stack:26248 pid:19500 ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
 schedule+0xde/0x1b0 kernel/sched/core.c:6695
 synchronize_rcu_expedited+0x5e2/0x770 kernel/rcu/tree_exp.h:1007
 synchronize_rcu+0x302/0x3b0 kernel/rcu/tree.c:3482
 synchronize_net+0x4e/0x60 net/core/dev.c:10749
 nf_conntrack_cleanup_net_list+0x9e/0x5d0 net/netfilter/nf_conntrack_core.c:2555
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:174
 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:606
 process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293
 worker_thread+0x669/0x1090 kernel/workqueue.c:2440
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
4 locks held by kworker/u4:9/19500:
 #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x86d/0x1750 kernel/workqueue.c:2264
 #1: ffffc9000315fda8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1750 kernel/workqueue.c:2268
 #2: ffffffff8e0b3510 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb10 net/core/net_namespace.c:568
 #3: ffffffff8c79f138 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
 #3: ffffffff8c79f138 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x658/0x770 kernel/rcu/tree_exp.h:992
task:syz-executor.4  state:R  running task     stack:23680 pid:19977 ppid:5118   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
 </TASK>
no locks held by syz-executor.4/19977.
task:syz-executor.4  state:R  running task     stack:23576 pid:20062 ppid:5118   flags:0x00004002
Call Trace:
 <TASK>
 </TASK>
no locks held by syz-executor.4/20062.
task:syz-executor.5  state:D stack:28112 pid:20073 ppid:17660  flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
 schedule+0xde/0x1b0 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6754
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747
 exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
 synchronize_rcu_expedited+0x400/0x770 kernel/rcu/tree_exp.h:992
 synchronize_net+0x3e/0x60 net/core/dev.c:10747
 __tun_detach+0x474/0x1400 drivers/net/tun.c:668
 tun_detach drivers/net/tun.c:700 [inline]
 tun_chr_close+0xc8/0x240 drivers/net/tun.c:3468
 __fput+0x27c/0xa90 fs/file_table.c:321
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff7d543df7b
RSP: 002b:00007ffd44bb7a10 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007ff7d543df7b
RDX: 0000000000000000 RSI: 0000001b337252a4 RDI: 0000000000000003
RBP: 00007ff7d55ad980 R08: 0000000000000000 R09: 00000000163c2d9e
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000010cca1
R13: 00007ffd44bb7b10 R14: 00007ff7d55ac050 R15: 0000000000000032
 </TASK>
2 locks held by syz-executor.5/20073:
 #0: ffffffff8e0c71a8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:697 [inline]
 #0: ffffffff8e0c71a8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x240 drivers/net/tun.c:3468
 #1: