syzbot

INFO: task kworker/1:0:21 blocked for more than 143 seconds.
      Not tainted 5.15.120-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:0     state:D stack:24640 pid:   21 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5026 [inline]
 __schedule+0x12c4/0x4590 kernel/sched/core.c:6372
 schedule+0x11b/0x1f0 kernel/sched/core.c:6455
 usb_kill_urb+0x1c9/0x300 drivers/usb/core/urb.c:726
 usb_start_wait_urb+0x1ac/0x510 drivers/usb/core/message.c:64
 usb_internal_control_msg drivers/usb/core/message.c:102 [inline]
 usb_control_msg+0x2ad/0x4c0 drivers/usb/core/message.c:153
 hub_port_init+0xa05/0x23f0 drivers/usb/core/hub.c:4832
 hub_port_connect drivers/usb/core/hub.c:5287 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5502 [inline]
 port_event drivers/usb/core/hub.c:5648 [inline]
 hub_event+0x29ec/0x56d0 drivers/usb/core/hub.c:5730
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2307
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2454
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>

Showing all locks held in the system:
5 locks held by kworker/1:0/21:
 #0: ffff888141dfdd38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90000db7d20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffff88801efba220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #2: ffff88801efba220 (&dev->mutex){....}-{3:3}, at: hub_event+0x207/0x56d0 drivers/usb/core/hub.c:5676
 #3: ffff88801efbe5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3091 [inline]
 #3: ffff88801efbe5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5254 [inline]
 #3: ffff88801efbe5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5502 [inline]
 #3: ffff88801efbe5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5648 [inline]
 #3: ffff88801efbe5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x2325/0x56d0 drivers/usb/core/hub.c:5730
 #4: ffff88801ea45068 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5255 [inline]
 #4: ffff88801ea45068 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5502 [inline]
 #4: ffff88801ea45068 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5648 [inline]
 #4: ffff88801ea45068 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x235a/0x56d0 drivers/usb/core/hub.c:5730
1 lock held by khungtaskd/26:
 #0: ffffffff8c91e6a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3269:
 #0: ffff88814ae31098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc90002bb32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147
7 locks held by syz-executor260/25626:

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.15.120-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
 watchdog+0xe72/0xeb0 kernel/hung_task.c:295
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 25674 Comm: syz-executor260 Not tainted 5.15.120-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline]
RIP: 0010:rcu_is_watching+0x36/0xa0 kernel/rcu/tree.c:1122
Code: e8 2f e7 b0 08 89 c3 83 f8 08 73 72 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd e0 d7 34 8c 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 40 99 5e 00 48 c7 c3 88 a6 03 00 49 03 1e 48 89
RSP: 0000:ffffc9003feff9e8 EFLAGS: 00000246
RAX: 1ffffffff1869afc RBX: 0000000000000000 RCX: ffff888073ffbb80
RDX: ffff888073ffbb80 RSI: ffffffff8ad86260 RDI: ffffffff8ad86220
RBP: ffffea0001c11640 R08: ffffffff81a75795 R09: fffff940003822c1
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc9003feffb72
R13: ffffc9003feffb60 R14: ffffffff8c34d7e0 R15: dffffc0000000000
FS:  00005555556e6380(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f86a255edc3 CR3: 00000000a67f1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
 rcu_read_lock_held+0x11/0x40 kernel/rcu/update.c:309
 xa_entry include/linux/xarray.h:1182 [inline]
 xas_next_entry+0x270/0x3d0 include/linux/xarray.h:1641
 next_map_page mm/filemap.c:3287 [inline]
 filemap_map_pages+0xf3e/0x1560 mm/filemap.c:3343
 do_fault_around mm/memory.c:4213 [inline]
 do_read_fault mm/memory.c:4228 [inline]
 do_fault mm/memory.c:4362 [inline]
 handle_pte_fault mm/memory.c:4621 [inline]
 __handle_mm_fault mm/memory.c:4756 [inline]
 handle_mm_fault+0x341b/0x5950 mm/memory.c:4854
 do_user_addr_fault arch/x86/mm/fault.c:1397 [inline]
 handle_page_fault arch/x86/mm/fault.c:1485 [inline]
 exc_page_fault+0x271/0x740 arch/x86/mm/fault.c:1541
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0033:0x7f86a255edc3
Code: Unable to access opcode bytes at RIP 0x7f86a255ed99.
RSP: 002b:00007ffc85454c38 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f86a255edc3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000010
R10: 00005555556e6650 R11: 0000000000000246 R12: 0000000000000001
R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.009 msecs