INFO: task syz-executor.5:18078 blocked for more than 147 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:28112 pid:18078 ppid:5115   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: 0033:0x7f30f60276c6
RSP: 002b:00007ffebaad53e8 EFLAGS: 00010287
RAX: 0000001b32b22000 RBX: 00007f30f61ac018 RCX: 0000001b32b20000
RDX: 0000001b32b22004 RSI: 0000001b32b21780 RDI: 0000000098308073
RBP: 0000000098308073 R08: 0000001b32f20000 R09: 0000000098308077
R10: 00007ffebab9b090 R11: 0000000000020270 R12: 00007f30f61a0000
R13: 0000000000000001 R14: 0000000000002f3a R15: ffffffff89b98316
 </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:udevd           state:R  running task     stack:25016 pid:4438  ppid:1      flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
 </TASK>
3 locks held by udevd/4438:
task:getty           state:S stack:23336 pid:4755  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: 0033:0x7f55802538fe
RSP: 002b:00007fff44c04a88 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000561aea0ca910 RCX: 00007f55802538fe
RDX: 0000000000000001 RSI: 00007fff44c04aa0 RDI: 0000000000000000
RBP: 0000561aea0ca970 R08: 0000000000000007 R09: 0000561aea0cbcd0
R10: 0000000000000063 R11: 0000000000000246 R12: 0000561aea0ca9ac
R13: 00007fff44c04aa0 R14: 0000000000000000 R15: 0000561aea0ca9ac
 </TASK>
2 locks held by getty/4755:
 #0: ffff888027d09098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
task:kworker/1:8     state:D stack:25016 pid:5233  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/1:8/5233:
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x86d/0x1750 kernel/workqueue.c:2264
 #1: ffffc90004cafda8 (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:kworker/u4:9    state:S stack:26440 pid:5321  ppid:2      flags:0x00004000
Workqueue: events_unbound call_usermodehelper_exec_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
 do_wait+0x730/0xd90 kernel/exit.c:1624
 kernel_wait+0xa0/0x150 kernel/exit.c:1785
 </TASK>
2 locks held by kworker/u4:9/5321:
task:kworker/u4:16   state:D
 stack:26704 pid:7063  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/u4:16/7063:
 #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: ffffc9001516fda8 (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:kworker/0:10    state:R  running task     stack:24576 pid:7125  ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
 </TASK>
no locks held by kworker/0:10/7125.
task:kworker/1:13    state:D stack:24784 pid:14075 ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6619