INFO: task kworker/0:7:24425 blocked for more than 143 seconds. Not tainted 5.14.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:7 state:D stack:20152 pid:24425 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0xc07/0x11f0 kernel/sched/core.c:5940 schedule+0x14b/0x210 kernel/sched/core.c:6019 schedule_timeout+0x98/0x2f0 kernel/time/timer.c:1854 do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x48/0x60 kernel/sched/completion.c:138 pn533_send_cmd_sync drivers/nfc/pn533/pn533.c:631 [inline] pn533_get_firmware_version drivers/nfc/pn533/pn533.c:2521 [inline] pn533_finalize_setup+0x2c2/0xe70 drivers/nfc/pn533/pn533.c:2718 pn533_usb_probe+0xbdc/0xe00 drivers/nfc/pn533/usb.c:544 usb_probe_interface+0x633/0xb40 drivers/usb/core/driver.c:396 call_driver_probe+0x96/0x250 drivers/base/dd.c:517 really_probe+0x223/0x9c0 drivers/base/dd.c:595 __driver_probe_device+0x1f8/0x3e0 drivers/base/dd.c:747 driver_probe_device+0x50/0x240 drivers/base/dd.c:777 __device_attach_driver+0x1e1/0x3b0 drivers/base/dd.c:894 bus_for_each_drv+0x16a/0x1f0 drivers/base/bus.c:427 __device_attach+0x301/0x560 drivers/base/dd.c:965 bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:487 device_add+0x1295/0x1790 drivers/base/core.c:3352 usb_set_configuration+0x1a86/0x2100 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0x83/0x140 drivers/usb/core/generic.c:238 usb_probe_device+0x13a/0x260 drivers/usb/core/driver.c:293 call_driver_probe+0x96/0x250 drivers/base/dd.c:517 really_probe+0x223/0x9c0 drivers/base/dd.c:595 __driver_probe_device+0x1f8/0x3e0 drivers/base/dd.c:747 driver_probe_device+0x50/0x240 drivers/base/dd.c:777 __device_attach_driver+0x1e1/0x3b0 drivers/base/dd.c:894 bus_for_each_drv+0x16a/0x1f0 drivers/base/bus.c:427 __device_attach+0x301/0x560 drivers/base/dd.c:965 bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:487 device_add+0x1295/0x1790 drivers/base/core.c:3352 usb_new_device+0x108a/0x1940 drivers/usb/core/hub.c:2559 hub_port_connect+0x1055/0x27a0 drivers/usb/core/hub.c:5300 hub_port_connect_change+0x5d0/0xbf0 drivers/usb/core/hub.c:5440 port_event+0xaee/0x1140 drivers/usb/core/hub.c:5586 hub_event+0x48d/0xd80 drivers/usb/core/hub.c:5668 process_one_work+0x833/0x10c0 kernel/workqueue.c:2276 worker_thread+0xac1/0x1320 kernel/workqueue.c:2422 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Showing all locks held in the system: 1 lock held by khungtaskd/1610: #0: ffffffff8c7177c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by systemd-udevd/4863: 1 lock held by in:imklog/8138: #0: ffff88802be66870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:974 2 locks held by agetty/8148: #0: ffff888020206098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc90000eb82e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1c30 drivers/tty/n_tty.c:2113 2 locks held by agetty/8151: #0: ffff888020200098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc90000ebc2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1c30 drivers/tty/n_tty.c:2113 3 locks held by kworker/u4:12/16100: 5 locks held by kworker/0:7/24425: #0: ffff888019790938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x7aa/0x10c0 kernel/workqueue.c:2249 #1: ffffc90001d2fd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e8/0x10c0 kernel/workqueue.c:2251 #2: ffff8880218fb220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:754 [inline] #2: ffff8880218fb220 (&dev->mutex){....}-{3:3}, at: hub_event+0x157/0xd80 drivers/usb/core/hub.c:5614 #3: ffff88801bc6a220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:754 [inline] #3: ffff88801bc6a220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x560 drivers/base/dd.c:940 #4: ffff8880a28371a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:754 [inline] #4: ffff8880a28371a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x560 drivers/base/dd.c:940 6 locks held by syz-executor.3/380: 1 lock held by syz-executor.4/379: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1610 Comm: khungtaskd Not tainted 5.14.0-rc1-syzkaller #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+0x1d3/0x29f lib/dump_stack.c:105 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xd06/0xd50 kernel/hung_task.c:295 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8457 Comm: syz-executor.0 Not tainted 5.14.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:hlock_class kernel/locking/lockdep.c:199 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4689 [inline] RIP: 0010:__lock_acquire+0x637/0x6100 kernel/locking/lockdep.c:4965 Code: 8b 1c 24 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 80 ed ae 8f be 08 00 00 00 e8 f1 5d 67 00 48 0f a3 1d 09 e7 4c 0e <72> 32 48 c7 c0 80 67 70 90 48 c1 e8 03 49 b8 00 00 00 00 00 fc ff RSP: 0018:ffffc900019ff5a0 EFLAGS: 00000057 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8162066f RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8faeed80 RBP: ffffc900019ff930 R08: dffffc0000000000 R09: fffffbfff1f5ddb1 R10: fffffbfff1f5ddb1 R11: 0000000000000000 R12: ffff888020bb8a38 R13: ffff888020bb8a20 R14: 00000000000c0002 R15: ffff888020bb8000 FS: 0000000002808400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000970004 CR3: 000000006f5f4000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x182/0x4a0 kernel/locking/lockdep.c:5625 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xb3/0x100 kernel/locking/spinlock.c:159 debug_object_activate+0x97/0x6a0 lib/debugobjects.c:656 debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline] debug_activate kernel/time/hrtimer.c:475 [inline] enqueue_hrtimer kernel/time/hrtimer.c:982 [inline] __hrtimer_start_range_ns kernel/time/hrtimer.c:1120 [inline] hrtimer_start_range_ns+0x394/0x580 kernel/time/hrtimer.c:1150 hrtimer_start_expires include/linux/hrtimer.h:436 [inline] hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1817 [inline] do_nanosleep+0x15f/0x7b0 kernel/time/hrtimer.c:1893 hrtimer_nanosleep+0x239/0x470 kernel/time/hrtimer.c:1949 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1267 [inline] __se_sys_clock_nanosleep kernel/time/posix-timers.c:1245 [inline] __x64_sys_clock_nanosleep+0x344/0x3d0 kernel/time/posix-timers.c:1245 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x48a7a1 Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 aa e7 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 e3 e7 ff ff 48 8b 04 24 eb 97 66 2e 0f 1f RSP: 002b:00007ffc2ce06a90 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: ffffffffffffffda RBX: 0000000000001599 RCX: 000000000048a7a1 RDX: 00007ffc2ce06ad0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffc2ce06b6c R08: 0000000000000000 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 0000000000193731 R14: 0000000000000001 R15: 00007ffc2ce06bd0