INFO: task syz-executor.4:18189 blocked for more than 143 seconds. Not tainted 5.3.0+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28592 18189 1763 0x00000004 Call Trace: schedule+0xca/0x250 kernel/sched/core.c:4132 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4191 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x881/0x1360 kernel/locking/mutex.c:1103 device_lock include/linux/device.h:1462 [inline] usbdev_open+0x19d/0x840 drivers/usb/core/devio.c:1007 chrdev_open+0x219/0x5c0 fs/char_dev.c:414 do_dentry_open+0x494/0x1120 fs/open.c:797 do_last fs/namei.c:3408 [inline] path_openat+0x1430/0x3f50 fs/namei.c:3525 do_filp_open+0x1a1/0x280 fs/namei.c:3555 do_sys_open+0x3c0/0x580 fs/open.c:1089 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x413911 Code: 49 d3 e4 48 83 f9 40 4d 19 ed 4d 21 ec 4d 09 e0 48 83 fb 01 75 0c 44 88 02 49 c1 e8 08 48 ff c2 eb cf 4d 89 c4 49 83 e0 0f 49 <81> c8 f0 00 00 00 44 88 02 4c 8d 6a ff 41 84 45 00 4d 89 e0 49 c1 RSP: 002b:00007fd129a847a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000413911 RDX: 0000000000000000 RSI: 0000000000004000 RDI: 00007fd129a84850 RBP: 000000000075bf20 R08: 000000000000000f R09: 0000000000000000 R10: 00007fd129a859d0 R11: 0000000000000293 R12: 00007fd129a856d4 R13: 00000000004c8fb6 R14: 00000000004e0138 R15: 00000000ffffffff INFO: task syz-executor.4:18200 blocked for more than 143 seconds. Not tainted 5.3.0+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29424 18200 1763 0x00000004 Call Trace: schedule+0xca/0x250 kernel/sched/core.c:4132 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4191 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x881/0x1360 kernel/locking/mutex.c:1103 device_lock include/linux/device.h:1462 [inline] usbdev_open+0x19d/0x840 drivers/usb/core/devio.c:1007 chrdev_open+0x219/0x5c0 fs/char_dev.c:414 do_dentry_open+0x494/0x1120 fs/open.c:797 do_last fs/namei.c:3408 [inline] path_openat+0x1430/0x3f50 fs/namei.c:3525 do_filp_open+0x1a1/0x280 fs/namei.c:3555 do_sys_open+0x3c0/0x580 fs/open.c:1089 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x413911 Code: c3 fe ff ff 31 c0 48 89 ee bf 30 31 44 00 e8 36 d7 00 00 b8 14 fc ff ff e9 ac fe ff ff 66 66 66 2e 0f 1f 84 00 00 00 00 00 53 <48> 89 fe 48 89 fb 31 c0 bf 89 3c 44 00 e8 0d d7 00 00 66 83 bb c8 RSP: 002b:00007fd129a637a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000413911 RDX: 0000000000000000 RSI: 0000000000004000 RDI: 00007fd129a63850 RBP: 000000000075bfc8 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007fd129a646d4 R13: 00000000004c8fb6 R14: 00000000004e0138 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: ffffffff86eff3e0 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:5335 1 lock held by rsyslogd/1609: #0: ffff8881d673c360 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 fs/file.c:801 2 locks held by getty/1700: #0: ffff8881d9131a10 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: ffffc900004692e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156 2 locks held by getty/1701: #0: ffff8881d9137790 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: ffffc900004552e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156 2 locks held by getty/1702: #0: ffff8881d9132290 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: ffffc9000046d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156 2 locks held by getty/1703: #0: ffff8881d90ea290 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: ffffc9000047d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156 2 locks held by getty/1704: #0: ffff8881d9133c10 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: ffffc9000045d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156 2 locks held by getty/1705: #0: ffff8881d9793c10 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: ffffc900004452e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156 2 locks held by getty/5468: #0: ffff8881d9131190 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: ffffc9000eaeb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156 5 locks held by kworker/0:2/31432: #0: ffff8881d91f8628 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8881d91f8628 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881d91f8628 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8881d91f8628 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8881d91f8628 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline] #0: ffff8881d91f8628 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline] #0: ffff8881d91f8628 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x1530 kernel/workqueue.c:2240 #1: ffff8881c79afdd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x1530 kernel/workqueue.c:2244 #2: ffff8881d5cadf80 (&dev->mutex){....}, at: device_lock include/linux/device.h:1462 [inline] #2: ffff8881d5cadf80 (&dev->mutex){....}, at: hub_event+0x17c/0x3640 drivers/usb/core/hub.c:5387 #3: ffff8881aee70a80 (&dev->mutex){....}, at: device_lock include/linux/device.h:1462 [inline] #3: ffff8881aee70a80 (&dev->mutex){....}, at: __device_attach+0x7b/0x360 drivers/base/dd.c:871 #4: ffff8881d3d6bd10 (&dev->mutex){....}, at: device_lock include/linux/device.h:1462 [inline] #4: ffff8881d3d6bd10 (&dev->mutex){....}, at: __device_attach+0x7b/0x360 drivers/base/dd.c:871 1 lock held by syz-executor.4/18189: #0: ffff8881d5cadf80 (&dev->mutex){....}, at: device_lock include/linux/device.h:1462 [inline] #0: ffff8881d5cadf80 (&dev->mutex){....}, at: usbdev_open+0x19d/0x840 drivers/usb/core/devio.c:1007 1 lock held by syz-executor.4/18200: #0: ffff8881d5cadf80 (&dev->mutex){....}, at: device_lock include/linux/device.h:1462 [inline] #0: ffff8881d5cadf80 (&dev->mutex){....}, at: usbdev_open+0x19d/0x840 drivers/usb/core/devio.c:1007 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xca/0x13e lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x55/0x96 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1c7 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0x9a4/0xe50 kernel/hung_task.c:289 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:___update_load_sum kernel/sched/pelt.c:195 [inline] RIP: 0010:update_rt_rq_load_avg+0x53/0xa30 kernel/sched/pelt.c:319 Code: f3 48 83 e4 f0 48 c1 ea 03 48 83 ec 50 80 3c 02 00 0f 85 d0 06 00 00 48 8b 8b c0 0a 00 00 4c 89 ea 48 29 ca 0f 88 9b 00 00 00 <48> 89 d0 48 c1 e8 0a 48 85 c0 74 7e 48 81 e2 00 fc ff ff 4d 63 fc RSP: 0018:ffff8881db209d80 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: ffff8881db231d80 RCX: 00000254de550800 RDX: 00000000000d6d91 RSI: ffff8881db231d80 RDI: ffff8881db232840 RBP: ffff8881db209df8 R08: ffff8881db231f40 R09: ffff8881db231f90 R10: ffffed103b646574 R11: ffff8881db232ba3 R12: 0000000000000000 R13: 00000254de627591 R14: 00000254de627591 R15: ffff8881db232580 FS: 0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001d7a5e000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: update_blocked_averages+0xaf5/0x15c0 kernel/sched/fair.c:7584 _nohz_idle_balance+0x2e8/0x3f0 kernel/sched/fair.c:9653 __do_softirq+0x221/0x912 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x178/0x1a0 kernel/softirq.c:413 reschedule_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:854 RIP: 0010:default_idle+0x28/0x2e0 arch/x86/kernel/process.c:581 Code: 90 90 41 56 41 55 65 44 8b 2d 24 d5 8e 7a 41 54 55 53 0f 1f 44 00 00 e8 86 ac d0 fb e9 07 00 00 00 0f 00 2d 5a 7b 4f 00 fb f4 <65> 44 8b 2d 00 d5 8e 7a 0f 1f 44 00 00 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffffffff86e07da8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff02 RAX: 0000000000000007 RBX: ffffffff86e2b200 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffffff86e2ba4c RBP: fffffbfff0dc5640 R08: ffffffff86e2b200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x3b6/0x500 kernel/sched/idle.c:264 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:356 start_kernel+0x838/0x872 init/main.c:785 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241