INFO: task syz.3.261:6728 blocked for more than 143 seconds.
Not tainted 6.11.0-rc2-syzkaller-00111-gee9a43b7cfe2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.261 state:D stack:24640 pid:6728 tgid:6728 ppid:6395 flags:0x20004004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
vhost_vsock_stop drivers/vhost/vsock.c:635 [inline]
vhost_vsock_dev_release+0x1e8/0x410 drivers/vhost/vsock.c:746
__fput+0x24a/0x8a0 fs/file_table.c:422
task_work_run+0x24f/0x310 kernel/task_work.c:228
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
__do_fast_syscall_32+0xc4/0x110 arch/x86/entry/common.c:389
do_fast_syscall_32+0x34/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7fb2579
RSP: 002b:00000000f759fb1c EFLAGS: 00000206 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 000000000000001e
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz.3.261:6730 blocked for more than 144 seconds.
Not tainted 6.11.0-rc2-syzkaller-00111-gee9a43b7cfe2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.261 state:D stack:25392 pid:6730 tgid:6728 ppid:6395 flags:0x20004004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline]
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1528
filemap_invalidate_lock_shared include/linux/fs.h:854 [inline]
page_cache_ra_unbounded+0xf7/0x7f0 mm/readahead.c:225
do_sync_mmap_readahead+0x49c/0x970
filemap_fault+0x828/0x1760 mm/filemap.c:3314
__do_fault+0x135/0x460 mm/memory.c:4655
do_read_fault mm/memory.c:5061 [inline]
do_fault mm/memory.c:5191 [inline]
do_pte_missing mm/memory.c:3947 [inline]
handle_pte_fault+0x3b24/0x6eb0 mm/memory.c:5522
__handle_mm_fault mm/memory.c:5665 [inline]
handle_mm_fault+0x1029/0x1980 mm/memory.c:5833
do_user_addr_fault arch/x86/mm/fault.c:1389 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:__get_user_4+0x11/0x20 arch/x86/lib/getuser.S:83
Code: 01 ca c3 cc cc cc cc 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 89 c2 48 c1 fa 3f 48 09 d0 0f 01 cb <8b> 10 31 c0 0f 01 ca c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90
RSP: 0018:ffffc9000431f978 EFLAGS: 00050202
RAX: 0000000020000040 RBX: ffffc9000431fb60 RCX: ffffc9000431f803
RDX: 0000000000000000 RSI: ffffffff8c0ae6e0 RDI: ffffffff8c6060c0
RBP: ffffc9000431fa50 R08: ffffffff9017c72f R09: 1ffffffff202f8e5
R10: dffffc0000000000 R11: fffffbfff202f8e6 R12: ffffc9000431fac0
R13: ffffc9000431fb60 R14: 0000000020000040 R15: 1ffff92000863f6c
futex_wait_setup+0x190/0x340 kernel/futex/waitwake.c:629
__futex_wait+0x13c/0x320 kernel/futex/waitwake.c:664
futex_wait+0x101/0x360 kernel/futex/waitwake.c:697
do_futex+0x33b/0x560 kernel/futex/syscalls.c:102
__do_sys_futex_time32 kernel/futex/syscalls.c:509 [inline]
__se_sys_futex_time32+0x3dd/0x460 kernel/futex/syscalls.c:492
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xb4/0x110 arch/x86/entry/common.c:386
do_fast_syscall_32+0x34/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7fb2579
RSP: 002b:00000000f574556c EFLAGS: 00000206 ORIG_RAX: 00000000000000f0
RAX: ffffffffffffffda RBX: 0000000020000040 RCX: 0000000000000080
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
INFO: task vhost-6730:6731 blocked for more than 144 seconds.
Not tainted 6.11.0-rc2-syzkaller-00111-gee9a43b7cfe2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:vhost-6730 state:D stack:25144 pid:6731 tgid:6728 ppid:6395 flags:0x20004004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline]
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1528
filemap_invalidate_lock_shared include/linux/fs.h:854 [inline]
page_cache_ra_unbounded+0xf7/0x7f0 mm/readahead.c:225
do_sync_mmap_readahead+0x49c/0x970
filemap_fault+0x828/0x1760 mm/filemap.c:3314
__do_fault+0x135/0x460 mm/memory.c:4655
do_read_fault mm/memory.c:5061 [inline]
do_fault mm/memory.c:5191 [inline]
do_pte_missing mm/memory.c:3947 [inline]
handle_pte_fault+0x3b24/0x6eb0 mm/memory.c:5522
__handle_mm_fault mm/memory.c:5665 [inline]
handle_mm_fault+0x1029/0x1980 mm/memory.c:5833
do_user_addr_fault arch/x86/mm/fault.c:1389 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:__get_user_nocheck_2+0xa/0x20 arch/x86/lib/getuser.S:122
Code: 01 ca c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 01 cb 0f ae e8 <0f> b7 10 31 c0 0f 01 ca c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc9000435f938 EFLAGS: 00050246
RAX: 0000000020000484 RBX: ffff8880652f4c98 RCX: 0000000000000000
RDX: ffffc90013ef4000 RSI: 0000000000000007 RDI: ffff8880652f4ca8
RBP: ffffc9000435fbc8 R08: ffffffff890341d6 R09: 0000000000000000
R10: ffffc9000435fb60 R11: fffff5200086bf6e R12: 0000000020000480
R13: dffffc0000000000 R14: 0000000000000001 R15: ffffc9000435f940
vhost_get_avail_head drivers/vhost/vhost.c:1384 [inline]
vhost_get_vq_desc+0x2d3/0x2740 drivers/vhost/vhost.c:2598
vhost_vsock_handle_tx_kick+0x277/0xe20 drivers/vhost/vsock.c:507
vhost_run_work_list+0x145/0x1c0 drivers/vhost/vhost.c:407
vhost_task_fn+0x267/0x3f0 kernel/vhost_task.c:49
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e9382a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e9382a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e9382a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626
5 locks held by kworker/1:1/47:
#0: ffff8880192b3948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff8880192b3948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc90000b77d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc90000b77d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffff888023c75190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#2: ffff888023c75190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5849
#3: ffff8880662f8190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff8880662f8190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8e/0x520 drivers/base/dd.c:1004
#4: ffff88801c6ffa78 (&(&priv->bus_notifier)->rwsem){++++}-{3:3}, at: blocking_notifier_call_chain+0x53/0x90 kernel/notifier.c:387
2 locks held by getty/4994:
#0: ffff88807d9a80a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
4 locks held by udevd/5287:
#0: ffff8880224f1668 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xb7/0xd60 fs/seq_file.c:182
#1: ffff8880791bd488 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
#2: ffff88805a837f08 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
#3: ffff8880662f8190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff8880662f8190 (&dev->mutex){....}-{3:3}, at: uevent_show+0x17d/0x340 drivers/base/core.c:2743
1 lock held by syz.3.217/6234:
2 locks held by syz.3.261/6728:
#0: ffff8880652f0070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_vsock_stop drivers/vhost/vsock.c:624 [inline]
#0: ffff8880652f0070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_vsock_dev_release+0x199/0x410 drivers/vhost/vsock.c:746
#1: ffff8880652f4c70 (&vq->mutex){+.+.}-{3:3}, at: vhost_vsock_stop drivers/vhost/vsock.c:635 [inline]
#1: ffff8880652f4c70 (&vq->mutex){+.+.}-{3:3}, at: vhost_vsock_dev_release+0x1e8/0x410 drivers/vhost/vsock.c:746
1 lock held by syz.3.261/6730:
#0: ffff88801dd5f0c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:854 [inline]
#0: ffff88801dd5f0c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf7/0x7f0 mm/readahead.c:225
2 locks held by vhost-6730/6731:
#0: ffff8880652f4c70 (&vq->mutex){+.+.}-{3:3}, at: vhost_vsock_handle_tx_kick+0x129/0xe20 drivers/vhost/vsock.c:487
#1: ffff88801dd5f0c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:854 [inline]
#1: ffff88801dd5f0c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf7/0x7f0 mm/readahead.c:225
2 locks held by syz.4.311/6898:
#0: ffff8880573a0070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_vsock_stop drivers/vhost/vsock.c:624 [inline]
#0: ffff8880573a0070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_vsock_dev_release+0x199/0x410 drivers/vhost/vsock.c:746
#1: ffff8880573a4c70 (&vq->mutex){+.+.}-{3:3}, at: vhost_vsock_stop drivers/vhost/vsock.c:635 [inline]
#1: ffff8880573a4c70 (&vq->mutex){+.+.}-{3:3}, at: vhost_vsock_dev_release+0x1e8/0x410 drivers/vhost/vsock.c:746
1 lock held by syz.4.311/6901:
#0: ffff88801dd5f0c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:854 [inline]
#0: ffff88801dd5f0c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf7/0x7f0 mm/readahead.c:225
2 locks held by vhost-6901/6902:
#0: ffff8880573a4c70 (&vq->mutex){+.+.}-{3:3}, at: vhost_vsock_handle_tx_kick+0x129/0xe20 drivers/vhost/vsock.c:487
#1: ffff88801dd5f0c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:854 [inline]
#1: ffff88801dd5f0c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf7/0x7f0 mm/readahead.c:225
2 locks held by syz.4.430/7457:
#0: ffff8880546678e0 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:690 [inline]
#0: ffff8880546678e0 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x2f9/0x6e0 mm/memory.c:5999
#1: ffff88801dd5f0c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:854 [inline]
#1: ffff88801dd5f0c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_fault+0xb5b/0x1760 mm/filemap.c:3321
2 locks held by syz.4.430/7460:
#0: ffff8880546678e0 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:690 [inline]
#0: ffff8880546678e0 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x2f9/0x6e0 mm/memory.c:5999
#1: ffff88801dd5f0c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:854 [inline]
#1: ffff88801dd5f0c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_fault+0xb5b/0x1760 mm/filemap.c:3321
2 locks held by syz.4.430/7461:
#0: ffff88807f27f398 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:163 [inline]
#0: ffff88807f27f398 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5870 [inline]
#0: ffff88807f27f398 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5930
#1: ffff88801dd5f0c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:854 [inline]
#1: ffff88801dd5f0c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_fault+0xb5b/0x1760 mm/filemap.c:3321
3 locks held by syz-executor/8483:
#0: ffff88805f8c0d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:481 [inline]
#0: ffff88805f8c0d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2692
#1: ffff88805f8c0078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5145
#2: ffffffff8fded568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline]
#2: ffffffff8fded568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2592
3 locks held by syz.0.654/8674:
#0: ffff88802c618d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:481 [inline]
#0: ffff88802c618d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2692
#1: ffff88802c618078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5145
#2: ffffffff8fded568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline]
#2: ffffffff8fded568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2592
3 locks held by syz.3.656/8687:
#0: ffff88807b640d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:481 [inline]
#0: ffff88807b640d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2692
#1: ffff88807b640078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5145
#2: ffffffff8e93d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:296 [inline]
#2: ffffffff8e93d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:958
4 locks held by syz.4.632/8705:
#0: ffff88806cd38d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:481 [inline]
#0: ffff88806cd38d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2692
#1: ffff88806cd38078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5145
#2: ffffffff8fded568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline]
#2: ffffffff8fded568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2592
#3: ffffffff8e93d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:328 [inline]
#3: ffffffff8e93d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:958
1 lock held by syz.1.658/8706:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc2-syzkaller-00111-gee9a43b7cfe2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111