INFO: task kworker/0:2:706 blocked for more than 143 seconds. Not tainted 5.17.0-rc4-syzkaller-00081-ga5d847b0afd3 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:22264 pid: 706 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:4987 [inline] __schedule+0x931/0x22e0 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 rwsem_down_write_slowpath+0x634/0x1110 kernel/locking/rwsem.c:1142 __down_write_common kernel/locking/rwsem.c:1259 [inline] __down_write_common kernel/locking/rwsem.c:1256 [inline] __down_write kernel/locking/rwsem.c:1268 [inline] down_write+0x135/0x150 kernel/locking/rwsem.c:1515 usb_deregister_dev+0xaa/0x320 drivers/usb/core/file.c:239 wdm_disconnect+0x21/0x440 drivers/usb/class/cdc-wdm.c:1212 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458 __device_release_driver+0x5d7/0x700 drivers/base/dd.c:1206 device_release_driver_internal drivers/base/dd.c:1237 [inline] device_release_driver+0x26/0x40 drivers/base/dd.c:1260 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529 device_del+0x4f3/0xc80 drivers/base/core.c:3592 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x27a/0x78e drivers/usb/core/hub.c:2228 hub_port_connect drivers/usb/core/hub.c:5207 [inline] hub_port_connect_change drivers/usb/core/hub.c:5507 [inline] port_event drivers/usb/core/hub.c:5665 [inline] hub_event+0x1e39/0x44d0 drivers/usb/core/hub.c:5747 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307 worker_thread+0x657/0x1110 kernel/workqueue.c:2454 kthread+0x2ef/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INFO: task kworker/0:6:4122 blocked for more than 143 seconds. Not tainted 5.17.0-rc4-syzkaller-00081-ga5d847b0afd3 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:6 state:D stack:23184 pid: 4122 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:4987 [inline] __schedule+0x931/0x22e0 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 rwsem_down_write_slowpath+0x634/0x1110 kernel/locking/rwsem.c:1142 __down_write_common kernel/locking/rwsem.c:1259 [inline] __down_write_common kernel/locking/rwsem.c:1256 [inline] __down_write kernel/locking/rwsem.c:1268 [inline] down_write+0x135/0x150 kernel/locking/rwsem.c:1515 usb_register_dev drivers/usb/core/file.c:187 [inline] usb_register_dev+0x19d/0x7e0 drivers/usb/core/file.c:156 wdm_create+0x118a/0x17c0 drivers/usb/class/cdc-wdm.c:1111 wdm_probe+0x225/0x2d0 drivers/usb/class/cdc-wdm.c:1163 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:517 [inline] really_probe+0x245/0xcc0 drivers/base/dd.c:596 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:752 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:782 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:899 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427 __device_attach+0x228/0x4a0 drivers/base/dd.c:970 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487 device_add+0xb83/0x1e20 drivers/base/core.c:3405 usb_set_configuration+0x101e/0x1900 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:517 [inline] really_probe+0x245/0xcc0 drivers/base/dd.c:596 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:752 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:782 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:899 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427 __device_attach+0x228/0x4a0 drivers/base/dd.c:970 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487 device_add+0xb83/0x1e20 drivers/base/core.c:3405 usb_new_device.cold+0x63f/0x108e drivers/usb/core/hub.c:2566 hub_port_connect drivers/usb/core/hub.c:5363 [inline] hub_port_connect_change drivers/usb/core/hub.c:5507 [inline] port_event drivers/usb/core/hub.c:5665 [inline] hub_event+0x2585/0x44d0 drivers/usb/core/hub.c:5747 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307 worker_thread+0x657/0x1110 kernel/workqueue.c:2454 kthread+0x2ef/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INFO: task syz-executor.3:7324 blocked for more than 144 seconds. Not tainted 5.17.0-rc4-syzkaller-00081-ga5d847b0afd3 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:29168 pid: 7324 ppid: 1293 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4987 [inline] __schedule+0x931/0x22e0 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428 __mutex_lock_common kernel/locking/mutex.c:673 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733 sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396 usb_open+0x204/0x2e0 drivers/usb/core/file.c:48 chrdev_open+0x266/0x770 fs/char_dev.c:414 do_dentry_open+0x4b4/0x1110 fs/open.c:824 do_open fs/namei.c:3476 [inline] path_openat+0x1c9e/0x2940 fs/namei.c:3609 do_filp_open+0x1aa/0x400 fs/namei.c:3636 do_sys_openat2+0x16d/0x4d0 fs/open.c:1214 do_sys_open fs/open.c:1230 [inline] __do_sys_openat fs/open.c:1246 [inline] __se_sys_openat fs/open.c:1241 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1241 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f60cf5adf74 RSP: 002b:00007f60ce72eca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f60cf70e100 RCX: 00007f60cf5adf74 RDX: 0000000000000002 RSI: 00007f60ce72ed40 RDI: 00000000ffffff9c RBP: 00007f60ce72ed40 R08: 0000000000000000 R09: 000000000000000f R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007ffd78aa085f R14: 00007f60ce72f300 R15: 0000000000022000 INFO: task syz-executor.3:7328 blocked for more than 144 seconds. Not tainted 5.17.0-rc4-syzkaller-00081-ga5d847b0afd3 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28720 pid: 7328 ppid: 1293 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4987 [inline] __schedule+0x931/0x22e0 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 rwsem_down_read_slowpath+0x589/0xa70 kernel/locking/rwsem.c:1032 __down_read_common kernel/locking/rwsem.c:1214 [inline] __down_read kernel/locking/rwsem.c:1223 [inline] down_read+0xe2/0x440 kernel/locking/rwsem.c:1463 usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 chrdev_open+0x266/0x770 fs/char_dev.c:414 do_dentry_open+0x4b4/0x1110 fs/open.c:824 do_open fs/namei.c:3476 [inline] path_openat+0x1c9e/0x2940 fs/namei.c:3609 do_filp_open+0x1aa/0x400 fs/namei.c:3636 do_sys_openat2+0x16d/0x4d0 fs/open.c:1214 do_sys_open fs/open.c:1230 [inline] __do_sys_openat fs/open.c:1246 [inline] __se_sys_openat fs/open.c:1241 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1241 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f60cf5adf74 RSP: 002b:00007f60ce70dca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f60cf70e1d0 RCX: 00007f60cf5adf74 RDX: 0000000000000002 RSI: 00007f60ce70dd40 RDI: 00000000ffffff9c RBP: 00007f60ce70dd40 R08: 0000000000000000 R09: 000000000000000f R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007ffd78aa085f R14: 00007f60ce70e300 R15: 0000000000022000 INFO: task syz-executor.1:7786 blocked for more than 144 seconds. Not tainted 5.17.0-rc4-syzkaller-00081-ga5d847b0afd3 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28728 pid: 7786 ppid: 7317 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4987 [inline] __schedule+0x931/0x22e0 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 rwsem_down_read_slowpath+0x589/0xa70 kernel/locking/rwsem.c:1032 __down_read_common kernel/locking/rwsem.c:1214 [inline] __down_read kernel/locking/rwsem.c:1223 [inline] down_read+0xe2/0x440 kernel/locking/rwsem.c:1463 usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 chrdev_open+0x266/0x770 fs/char_dev.c:414 do_dentry_open+0x4b4/0x1110 fs/open.c:824 do_open fs/namei.c:3476 [inline] path_openat+0x1c9e/0x2940 fs/namei.c:3609 do_filp_open+0x1aa/0x400 fs/namei.c:3636 do_sys_openat2+0x16d/0x4d0 fs/open.c:1214 do_sys_open fs/open.c:1230 [inline] __do_sys_openat fs/open.c:1246 [inline] __se_sys_openat fs/open.c:1241 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1241 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f34d843cf74 RSP: 002b:00007f34d75ffca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f34d859cf60 RCX: 00007f34d843cf74 RDX: 0000000000000002 RSI: 00007f34d75ffd40 RDI: 00000000ffffff9c RBP: 00007f34d75ffd40 R08: 0000000000000000 R09: 000000000000000f R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007ffd21bbecef R14: 00007f34d7600300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/25: #0: ffffffff87891580 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460 6 locks held by kworker/0:2/706: #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline] #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline] #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278 #1: ffffc90001d07db8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282 #2: ffff88810d149220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #2: ffff88810d149220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c5/0x44d0 drivers/usb/core/hub.c:5693 #3: ffff8881146ca220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #3: ffff8881146ca220 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x78e drivers/usb/core/hub.c:2219 #4: ffff8881169a91a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #4: ffff8881169a91a8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1033 [inline] #4: ffff8881169a91a8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal drivers/base/dd.c:1234 [inline] #4: ffff8881169a91a8 (&dev->mutex){....}-{3:3}, at: device_release_driver+0x1c/0x40 drivers/base/dd.c:1260 #5: ffffffff881d50d0 (minor_rwsem){++++}-{3:3}, at: usb_deregister_dev+0xaa/0x320 drivers/usb/core/file.c:239 6 locks held by kworker/0:3/1129: #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline] #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline] #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278 #1: ffffc90002887db8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282 #2: ffff88810d131220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #2: ffff88810d131220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c5/0x44d0 drivers/usb/core/hub.c:5693 #3: ffff8881053de220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #3: ffff8881053de220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:945 #4: ffff888118e0c1a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #4: ffff888118e0c1a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:945 #5: ffffffff881d50d0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline] #5: ffffffff881d50d0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x19d/0x7e0 drivers/usb/core/file.c:156 2 locks held by getty/1228: #0: ffff88810e51a098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc900000432e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077 6 locks held by kworker/0:6/4122: #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline] #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline] #0: ffff8881039be138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278 #1: ffffc90001bd7db8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282 #2: ffff88810d0a9220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #2: ffff88810d0a9220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c5/0x44d0 drivers/usb/core/hub.c:5693 #3: ffff888107995220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #3: ffff888107995220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:945 #4: ffff8881079961a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #4: ffff8881079961a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:945 #5: ffffffff881d50d0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline] #5: ffffffff881d50d0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x19d/0x7e0 drivers/usb/core/file.c:156 3 locks held by udevd/7301: #0: ffff8881169dc088 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:203 [inline] #0: ffff8881169dc088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x6f0 fs/kernfs/file.c:242 #1: ffff8881087f21d8 (kn->active#49){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:204 [inline] #1: ffff8881087f21d8 (kn->active#49){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x6f0 fs/kernfs/file.c:242 #2: ffff888107995220 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:772 [inline] #2: ffff888107995220 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873 2 locks held by syz-executor.3/7321: #0: ffffffff881d50d0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 #1: ffff8881079da0d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396 2 locks held by syz-executor.3/7324: #0: ffffffff881d50d0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 #1: ffff8881079da0d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396 1 lock held by syz-executor.3/7328: #0: ffffffff881d50d0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 1 lock held by syz-executor.1/7786: #0: ffffffff881d50d0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 25 Comm: khungtaskd Not tainted 5.17.0-rc4-syzkaller-00081-ga5d847b0afd3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:369 kthread+0x2ef/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 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:51 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:110 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry+0x1c6/0x250 drivers/acpi/processor_idle.c:551