syzbot

 sign-in | mailing list | source | docs
🐞 Open [1523]
≡ Subsystems
🐞 Fixed [6458]
🐞 Invalid [16354]
⬇ Missing Backports [198]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
Total Repo Heatmap Subsystems Heatmap
💬 Send us feedback

INFO: rcu detected stall in proc_reg_read (6)

Status: auto-closed as invalid on 2021/08/03 06:54
Subsystems: fs
[Documentation on labels]
First crash: 1541d, last: 1541d
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in proc_reg_read mm 1 6 2407d 2487d 0/29 closed as dup on 2019/01/02 16:24
upstream INFO: rcu detected stall in proc_reg_read (2) kernel 1 36 2059d 2060d 0/29 closed as invalid on 2019/12/04 14:14
upstream INFO: rcu detected stall in proc_reg_read (5) fs 1 1 1798d 1798d 0/29 auto-closed as invalid on 2020/11/18 23:09
linux-4.19 INFO: rcu detected stall in proc_reg_read 1 syz error 11 922d 1648d 0/1 upstream: reported syz repro on 2021/01/17 20:31
upstream INFO: rcu detected stall in proc_reg_read (4) kernel 1 9 2024d 2024d 0/29 closed as invalid on 2020/01/09 08:13
upstream INFO: rcu detected stall in proc_reg_read (3) kernel 1 3 2024d 2024d 0/29 closed as invalid on 2020/01/08 05:23

Sample crash report:
rcu: INFO: rcu_sched self-detected stall on CPU
rcu: 	1-...!: (1 GPs behind) idle=a1e/1/0x4000000000000000 softirq=79914/79915 fqs=1 
	(t=11120 jiffies g=142989 q=9532)
rcu: rcu_sched kthread starved for 8807 jiffies! g142989 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_sched kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_sched       state:R
  running task     stack:29088 pid:   11 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892
 rcu_gp_fqs_loop kernel/rcu/tree.c:2005 [inline]
 rcu_gp_kthread+0xa36/0x1ba0 kernel/rcu/tree.c:2178
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
task:rcu_gp          state:I
NMI backtrace for cpu 0
CPU: 0 PID: 4272 Comm: in:imklog Not tainted 5.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:sprintf+0x6a/0x100 lib/vsprintf.c:2848
Code: 00 00 4c 89 8c 24 a8 00 00 00 48 c7 04 24 b3 8a b5 41 48 c7 44 24 08 07 b3 fe 86 48 c7 44 24 10 10 52 0a 82 c7 03 f1 f1 f1 f1 <c7> 43 04 00 00 00 f3 c7 43 08 f3 f3 f3 f3 65 48 8b 04 25 28 00 00
RSP: 0018:ffffc900000074d8 EFLAGS: 00000082
RAX: dffffc0000000000 RBX: fffff52000000e9b RCX: 00000000000645ed
RDX: 00000000000003ce RSI: ffffffff8607fb40 RDI: ffffc900000076c8
RBP: ffffc900000075a0 R08: 00000000000003ce R09: 0000000000000001
R10: ffffffff81295799 R11: 0000000000000000 R12: ffffc900000076c8
R13: ffffffff8607fb40 R14: 0000000000000000 R15: ffffc900000076c8
FS:  00007f9c77556700(0000) GS:ffff8881f6a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe3d48f8000 CR3: 000000010555a000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 print_time kernel/printk/printk.c:1251 [inline]
 info_print_prefix+0x248/0x340 kernel/printk/printk.c:1277
 record_print_text+0x14d/0x3e0 kernel/printk/printk.c:1326
 console_unlock+0x30f/0xc60 kernel/printk/printk.c:2561
 vprintk_emit+0x20a/0x580 kernel/printk/printk.c:2098
 vprintk_func+0x8b/0x140 kernel/printk/printk_safe.c:401
 printk+0xba/0xed kernel/printk/printk.c:2146
 sched_show_task kernel/sched/core.c:7348 [inline]
 sched_show_task+0x235/0x5a0 kernel/sched/core.c:7340
 show_state_filter+0xf4/0x2e0 kernel/sched/core.c:7409
 k_spec drivers/tty/vt/keyboard.c:660 [inline]
 k_spec+0xe1/0x130 drivers/tty/vt/keyboard.c:649
 kbd_keycode drivers/tty/vt/keyboard.c:1512 [inline]
 kbd_event+0xc64/0x1750 drivers/tty/vt/keyboard.c:1531
 input_to_handler+0x3b9/0x4c0 drivers/input/input.c:118
 input_pass_values.part.0+0x28d/0x700 drivers/input/input.c:145
 input_pass_values drivers/input/input.c:181 [inline]
 input_repeat_key+0x283/0x380 drivers/input/input.c:194
 call_timer_fn+0x1a5/0x630 kernel/time/timer.c:1431
 expire_timers kernel/time/timer.c:1476 [inline]
 __run_timers.part.0+0x67c/0xa10 kernel/time/timer.c:1745
 __run_timers kernel/time/timer.c:1726 [inline]
 run_timer_softirq+0x80/0x120 kernel/time/timer.c:1758
 __do_softirq+0x1b0/0x944 kernel/softirq.c:559
 invoke_softirq kernel/softirq.c:433 [inline]
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0x110/0x1a0 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x6a/0x90 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
RIP: 0010:__might_sleep+0x18/0x190 kernel/sched/core.c:8270
Code: e8 9d e1 4f 00 e9 52 fe ff ff 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 55 41 89 d5 41 54 41 89 f4 55 48 89 fd <53> 65 48 8b 1c 25 40 ef 01 00 48 8d 7b 18 48 83 ec 10 48 89 fa 48
RSP: 0018:ffffc900021c7a40 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 000000000000001c RDI: ffffffff861f95e0
RBP: ffffffff861f95e0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8160298f R11: 0000000000000000 R12: 000000000000001c
R13: 0000000000000000 R14: 0000000000000b53 R15: 00007f9c775368f3
 __might_fault+0x6e/0x180 mm/memory.c:5018
 _copy_to_user+0x27/0x150 lib/usercopy.c:28
 copy_to_user include/linux/uaccess.h:200 [inline]
 syslog_print+0x19c/0x430 kernel/printk/printk.c:1477
 do_syslog.part.0+0x31c/0x7e0 kernel/printk/printk.c:1588
 do_syslog+0x49/0x60 kernel/printk/printk.c:1569
 kmsg_read+0x90/0xb0 fs/proc/kmsg.c:40
 pde_read fs/proc/inode.c:321 [inline]
 proc_reg_read+0x119/0x300 fs/proc/inode.c:331
 vfs_read+0x1b5/0x570 fs/read_write.c:494
 ksys_read+0x12d/0x250 fs/read_write.c:634
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f9c79b9922d
Code: c1 20 00 00 75 10 b8 00 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 4e fc ff ff 48 89 04 24 b8 00 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 97 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007f9c77535580 EFLAGS: 00000293 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9c79b9922d
RDX: 0000000000001fa0 RSI: 00007f9c77535da0 RDI: 0000000000000004
RBP: 000055868c6119d0 R08: 0000000000000000 R09: 0000000000000000
R10: 2ce33e6c02ce33e7 R11: 0000000000000293 R12: 00007f9c77535da0
R13: 0000000000001fa0 R14: 0000000000001f9f R15: 00007f9c77537d13
NMI backtrace for cpu 1
 stack:30192 pid:    3 ppid:     2 flags:0x00004000
CPU: 1 PID: 10107 Comm: systemd-udevd Not tainted 5.12.0-syzkaller #0
Call Trace:
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x143/0x1db lib/dump_stack.c:120
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 nmi_cpu_backtrace.cold+0x46/0xe0 lib/nmi_backtrace.c:105
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 nmi_trigger_cpumask_backtrace+0x1da/0x200 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x222/0x2a7 kernel/rcu/tree_stall.h:341
 print_cpu_stall kernel/rcu/tree_stall.h:622 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:697 [inline]
 rcu_pending kernel/rcu/tree.c:3830 [inline]
 rcu_sched_clock_irq.cold+0x51f/0xada kernel/rcu/tree.c:2650
 update_process_times+0x139/0x1b0 kernel/time/timer.c:1796
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
 kthread+0x38c/0x460 kernel/kthread.c:292
 tick_sched_timer+0x1a4/0x2c0 kernel/time/tick-sched.c:1373
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x1c0/0xd80 kernel/time/hrtimer.c:1601
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:rcu_par_gp      state:I
 stack:30920 pid:    4 ppid:     2 flags:0x00004000
 hrtimer_interrupt+0x2fc/0x9b0 kernel/time/hrtimer.c:1663
Call Trace:
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0xf5/0x420 arch/x86/kernel/apic/apic.c:1106
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 sysvec_apic_timer_interrupt+0x2f/0x90 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
RIP: 0010:_raw_spin_unlock_irqrestore+0x3a/0x50 kernel/locking/spinlock.c:192
Code: 10 e8 ba 83 78 fb 48 89 ef e8 92 37 79 fb 81 e3 00 02 00 00 75 17 9c 58 f6 c4 02 75 17 48 85 db 74 01 fb 65 ff 0d 36 30 53 7a <5b> 5d c3 e8 be 6e 97 fb eb e2 e8 47 86 fe ff eb e2 0f 1f 44 00 00
 schedule+0xcb/0x270 kernel/sched/core.c:5152
RSP: 0018:ffffc90000148c88 EFLAGS: 00000206
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584

RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1445442
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff85aebed2
RBP: ffff88811899c218 R08: 0000000000000001 R09: ffffffff8a1e97cf
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000246
R13: ffff88811899c218 R14: 0000000000000021 R15: ffff88811899c108
 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline]
 input_repeat_key+0x118/0x380 drivers/input/input.c:201
 kthread+0x38c/0x460 kernel/kthread.c:292
 call_timer_fn+0x1a5/0x630 kernel/time/timer.c:1431
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kworker/0:0     state:R
  running task     stack:22056 pid:    5 ppid:     2 flags:0x00004000
Workqueue:  0x0
 (events)
 expire_timers kernel/time/timer.c:1476 [inline]
 __run_timers.part.0+0x67c/0xa10 kernel/time/timer.c:1745

Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 worker_thread+0x14c/0x1120 kernel/workqueue.c:2442
 __run_timers kernel/time/timer.c:1726 [inline]
 run_timer_softirq+0x80/0x120 kernel/time/timer.c:1758
 __do_softirq+0x1b0/0x944 kernel/softirq.c:559
 kthread+0x38c/0x460 kernel/kthread.c:292
 invoke_softirq kernel/softirq.c:433 [inline]
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0x110/0x1a0 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x6a/0x90 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
task:kworker/0:0H    state:I
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:197
 stack:29296 pid:    6 ppid:     2 flags:0x00004000
Code: 89 03 e9 04 fd ff ff b9 ff ff ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 66 0f 1f 44 00 00 <65> 8b 05 29 99 c1 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b
Workqueue:  0x0
RSP: 0018:ffffc900068d7900 EFLAGS: 00000202
 (events_highpri)

RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000001

Call Trace:
RDX: 0000000000000000 RSI: ffff888117fc0000 RDI: 0000000000000003
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
RBP: ffff888105dc0480 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff81dd7757 R11: 0000000000000010 R12: 0000000000000002
R13: 00000000000002b1 R14: dffffc0000000000 R15: 0000000000000001
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 worker_thread+0x14c/0x1120 kernel/workqueue.c:2442
 tomoyo_domain_quota_is_ok+0x311/0x550 security/tomoyo/util.c:1094
 tomoyo_supervisor+0x2f2/0xf00 security/tomoyo/common.c:2089
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kworker/0:1     state:D
 stack:22200 pid:    7 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event

Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
 tomoyo_path_permission security/tomoyo/file.c:587 [inline]
 tomoyo_path_permission+0x270/0x3a0 security/tomoyo/file.c:573
 tomoyo_path_perm+0x2f0/0x400 security/tomoyo/file.c:838
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 synchronize_rcu_expedited+0x47a/0x640 kernel/rcu/tree_exp.h:852
 security_inode_getattr+0xcf/0x140 security/security.c:1288
 vfs_getattr fs/stat.c:131 [inline]
 vfs_fstat+0x43/0xb0 fs/stat.c:156
 __do_sys_newfstat+0x81/0x100 fs/stat.c:396
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 synchronize_rcu+0x106/0x1a0 kernel/rcu/tree.c:3767
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f59cfbdc2e2
Code: 48 8b 05 b9 db 2b 00 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 83 ff 01 77 33 48 63 fe b8 05 00 00 00 48 89 d6 0f 05 <48> 3d 00 f0 ff ff 77 06 f3 c3 0f 1f 40 00 48 8b 15 81 db 2b 00 f7
RSP: 002b:00007ffc250ba798 EFLAGS: 00000246
 ORIG_RAX: 0000000000000005
RAX: ffffffffffffffda RBX: 00007f59cfe97440 RCX: 00007f59cfbdc2e2
 kbd_disconnect+0x19/0x30 drivers/tty/vt/keyboard.c:1597
RDX: 00007ffc250ba7a0 RSI: 00007ffc250ba7a0 RDI: 0000000000000007
 __input_unregister_device+0x206/0x470 drivers/input/input.c:2189
RBP: 0000562915094250 R08: 0000000000000b40 R09: 00005629150a1180
 input_unregister_device+0xb4/0xf0 drivers/input/input.c:2379
R10: 0000562915094250 R11: 0000000000000246 R12: 0000000000000001
 dvb_usb_remote_exit+0x164/0x1d0 drivers/media/usb/dvb-usb/dvb-usb-remote.c:351
R13: 0000000000001000 R14: 00005629150a1180 R15: 00007ffc250baa90
 dvb_usb_exit.isra.0+0x1e/0x310 drivers/media/usb/dvb-usb/dvb-usb-init.c:128
 dvb_usb_device_exit+0x16a/0x280 drivers/media/usb/dvb-usb/dvb-usb-init.c:306
 usb_unbind_interface+0x1d8/0x8d0 drivers/usb/core/driver.c:458
 __device_release_driver+0x3bd/0x6f0 drivers/base/dd.c:1181
 device_release_driver_internal drivers/base/dd.c:1212 [inline]
 device_release_driver+0x26/0x40 drivers/base/dd.c:1235
 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:533
 device_del+0x502/0xd40 drivers/base/core.c:3507
 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1413
 usb_disconnect.cold+0x27d/0x791 drivers/usb/core/hub.c:2219
 hub_port_connect drivers/usb/core/hub.c:5127 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5416 [inline]
 port_event drivers/usb/core/hub.c:5562 [inline]
 hub_event+0x1c9c/0x4320 drivers/usb/core/hub.c:5644
 process_one_work+0x98d/0x1580 kernel/workqueue.c:2275
 process_scheduled_works kernel/workqueue.c:2337 [inline]
 worker_thread+0x82b/0x1120 kernel/workqueue.c:2423
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kworker/u4:0    state:I stack:24192 pid:    8 ppid:     2 flags:0x00004000
Workqueue:  0x0 (events_unbound)
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 worker_thread+0x14c/0x1120 kernel/workqueue.c:2442
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:mm_percpu_wq    state:I stack:30920 pid:    9 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:ksoftirqd/0     state:S stack:27480 pid:   10 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 smpboot_thread_fn+0x589/0x870 kernel/smpboot.c:161
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:rcu_sched       state:R  running task     stack:29088 pid:   11 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892
 rcu_gp_fqs_loop kernel/rcu/tree.c:2005 [inline]
 rcu_gp_kthread+0xa36/0x1ba0 kernel/rcu/tree.c:2178
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:migration/0     state:R  running task     stack:30168 pid:   12 ppid:     2 flags:0x00004000
Stopper: 0x0 <- 0x0
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 smpboot_thread_fn+0x589/0x870 kernel/smpboot.c:161
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:cpuhp/0         state:S stack:26144 pid:   13 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 smpboot_thread_fn+0x589/0x870 kernel/smpboot.c:161
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:cpuhp/1         state:S stack:27920 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 smpboot_thread_fn+0x589/0x870 kernel/smpboot.c:161
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:migration/1     state:R  running task     stack:30496 pid:   15 ppid:     2 flags:0x00004000
Stopper: 0x0 <- 0x0
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 smpboot_thread_fn+0x589/0x870 kernel/smpboot.c:161
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:ksoftirqd/1     state:S stack:25016 pid:   16 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 smpboot_thread_fn+0x589/0x870 kernel/smpboot.c:161
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kworker/1:0H    state:I stack:29168 pid:   18 ppid:     2 flags:0x00004000
Workqueue:  0x0 (kblockd)
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 worker_thread+0x14c/0x1120 kernel/workqueue.c:2442
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kdevtmpfs       state:S stack:27312 pid:   19 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 devtmpfs_work_loop drivers/base/devtmpfs.c:404 [inline]
 devtmpfsd+0x278/0x2a3 drivers/base/devtmpfs.c:437
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:netns           state:I stack:29888 pid:   20 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:inet_frag_wq    state:I stack:30304 pid:   21 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kworker/u4:1    state:R  running task     stack:24032 pid:   22 ppid:     2 flags:0x00004000
Workqueue:  0x0 (events_unbound)
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 worker_thread+0x14c/0x1120 kernel/workqueue.c:2442
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kworker/1:1     state:R  running task     stack:19512 pid:   32 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892
 schedule_timeout_uninterruptible kernel/time/timer.c:1926 [inline]
 msleep+0xa4/0xf0 kernel/time/timer.c:2046
 hub_port_init+0x76e/0x2e40 drivers/usb/core/hub.c:4730
 hub_port_connect drivers/usb/core/hub.c:5208 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5416 [inline]
 port_event drivers/usb/core/hub.c:5562 [inline]
 hub_event+0x2190/0x4320 drivers/usb/core/hub.c:5644
 process_one_work+0x98d/0x1580 kernel/workqueue.c:2275
 process_scheduled_works kernel/workqueue.c:2337 [inline]
 worker_thread+0x82b/0x1120 kernel/workqueue.c:2423
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kauditd         state:S stack:29104 pid:   33 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 freezable_schedule include/linux/freezer.h:172 [inline]
 kauditd_thread+0x6b8/0xba0 kernel/audit.c:881
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kworker/u4:2    state:R  running task     stack:24040 pid:   45 ppid:     2 flags:0x00004000
Workqueue:  0x0 (events_unbound)
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 worker_thread+0x14c/0x1120 kernel/workqueue.c:2442
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kworker/u4:4    state:I stack:24144 pid:  629 ppid:     2 flags:0x00004000
Workqueue:  0x0 (events_unbound)
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 worker_thread+0x14c/0x1120 kernel/workqueue.c:2442
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:khungtaskd      state:R  running task     stack:29976 pid: 1256 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892
 watchdog+0xf9/0xf70 kernel/hung_task.c:298
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:oom_reaper      state:S stack:30400 pid: 1266 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 freezable_schedule include/linux/freezer.h:172 [inline]
 oom_reaper+0x95e/0xd10 mm/oom_kill.c:646
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:writeback       state:I stack:30496 pid: 1267 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kcompactd0      state:R  running task     stack:29632 pid: 1269 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892
 freezable_schedule_timeout include/linux/freezer.h:192 [inline]
 kcompactd+0x566/0xca0 mm/compaction.c:2865
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kblockd         state:I stack:30704 pid: 1294 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:tpm_dev_wq      state:I stack:30624 pid: 1381 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:ata_sff         state:I stack:30152 pid: 1391 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:md              state:I stack:29840 pid: 1425 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:edac-poller     state:I stack:30496 pid: 1426 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kworker/0:2     state:R  running task     stack:22024 pid: 1516 ppid:     2 flags:0x00004000
Workqueue: events atkbd_event_work
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892
 ps2_do_sendbyte+0x43a/0x720 drivers/input/serio/libps2.c:45
 __ps2_command+0x238/0x10b0 drivers/input/serio/libps2.c:265
 ps2_command+0x7d/0x120 drivers/input/serio/libps2.c:332
 atkbd_set_leds.isra.0+0x17d/0x460 drivers/input/keyboard/atkbd.c:606
 atkbd_event_work+0x13c/0x160 drivers/input/keyboard/atkbd.c:646
 process_one_work+0x98d/0x1580 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kworker/0:1H    state:I stack:28024 pid: 1545 ppid:     2 flags:0x00004000
Workqueue:  0x0 (kblockd)
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 worker_thread+0x14c/0x1120 kernel/workqueue.c:2442
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:rpciod          state:I stack:30704 pid: 1546 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kworker/u5:0    state:I stack:28960 pid: 1547 ppid:     2 flags:0x00004000
Workqueue:  0x0 (hci0)
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 worker_thread+0x14c/0x1120 kernel/workqueue.c:2442
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:xprtiod         state:I stack:30704 pid: 1548 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:cfg80211        state:I stack:30328 pid: 1551 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kswapd0         state:S stack:30080 pid: 1576 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 kswapd_try_to_sleep mm/vmscan.c:3836 [inline]
 kswapd+0xb5b/0xd30 mm/vmscan.c:3897
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:nfsiod          state:I stack:30640 pid: 1578 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:acpi_thermal_pm state:I stack:30496 pid: 1612 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:hwrng           state:S stack:30112 pid: 1657 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 add_hwgenerator_randomness+0x1b0/0x220 drivers/char/random.c:2286
 hwrng_fillfn+0x1e7/0x2d0 drivers/char/hw_random/core.c:452
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:scsi_eh_0       state:S stack:30728 pid: 1700 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 scsi_error_handler+0x529/0xea0 drivers/scsi/scsi_error.c:2231
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:scsi_tmf_0      state:I stack:30704 pid: 1701 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kworker/1:1H    state:R  running task     stack:27856 pid: 1715 ppid:     2 flags:0x00004000
Workqueue:  0x0 (kblockd)
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 worker_thread+0x14c/0x1120 kernel/workqueue.c:2442
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:target_completi state:I stack:30704 pid: 1727 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:xcopy_wq        state:I stack:30704 pid: 1728 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:libertastf      state:I stack:30704 pid: 1791 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:zd1211rw        state:I stack:30584 pid: 1810 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:u132            state:I stack:29840 pid: 1873 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:uas             state:I stack:30704 pid: 1886 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:usbip_event     state:I stack:30784 pid: 2166 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kworker/1:2     state:I stack:22280 pid: 2209 ppid:     2 flags:0x00004000
Workqueue:  0x0 (events)
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 worker_thread+0x14c/0x1120 kernel/workqueue.c:2442
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:pvrusb2-context state:S stack:30456 pid: 2374 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 pvr2_context_thread_func+0x5e2/0x850 drivers/media/usb/pvrusb2/pvrusb2-context.c:160
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kvub300c        state:I stack:30704 pid: 2421 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kvub300p        state:I stack:30704 pid: 2422 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kvub300d        state:I stack:30704 pid: 2423 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:kmemstick       state:I stack:30784 pid: 2427 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:elousb          state:I stack:30624 pid: 2451 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:ipv6_addrconf   state:I stack:30704 pid: 2584 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:ext4-rsv-conver state:I stack:30704 pid: 2605 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 rescuer_thread+0x7a7/0xd30 kernel/workqueue.c:2584
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
task:systemd-journal state:R  running task     stack:23984 pid: 2628 ppid:     1 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 exit_to_user_mode_loop kernel/entry/common.c:162 [inline]
 exit_to_user_mode_prepare+0x12d/0x220 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fe3d847df17
RSP: 002b:00007ffd6e3744a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000027
RAX: 0000000000000a44 RBX: 00005636803b01e0 RCX: 00007fe3d847df17
RDX: 0000000000000000 RSI: 00007ffd6e3745c0 RDI: 00005636803b01e0
RBP: 00007ffd6e3745c0 R08: 0cfbb4168404499a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000a44
R13: 00007ffd6e374568 R14: 00007ffd6e3745c0 R15: 00007ffd6e374b58
task:systemd-udevd   state:S stack:22624 pid: 2643 ppid:     1 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 schedule_hrtimeout_range_clock+0x333/0x380 kernel/time/hrtimer.c:2148
 ep_poll fs/eventpoll.c:1842 [inline]
 do_epoll_wait+0x1240/0x1920 fs/eventpoll.c:2220
 __do_sys_epoll_wait fs/eventpoll.c:2232 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2227 [inline]
 __x64_sys_epoll_wait+0x158/0x270 fs/eventpoll.c:2227
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f59cfbea2e3
RSP: 002b:00007ffc250bf5e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00005629150a8260 RCX: 00007f59cfbea2e3
RDX: 000000000000000b RSI: 00007ffc250bf5f0 RDI: 000000000000000a
RBP: 00007ffc250bf780 R08: 0000000000000008 R09: 00007ffc251370f0
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc250bf5f0
R13: 0000000000000001 R14: ffffffffffffffff R15: 0000000000000000
task:systemd-timesyn state:R  running task     stack:27640 pid: 2708 ppid:     1 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 schedule_hrtimeout_range_clock+0x333/0x380 kernel/time/hrtimer.c:2148
 ep_poll fs/eventpoll.c:1842 [inline]
 do_epoll_wait+0x1240/0x1920 fs/eventpoll.c:2220
 __do_sys_epoll_wait fs/eventpoll.c:2232 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2227 [inline]
 __x64_sys_epoll_wait+0x158/0x270 fs/eventpoll.c:2227
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f71e0839303
RSP: 002b:00007ffd8f988b80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00005604e752d8f0 RCX: 00007f71e0839303
RDX: 0000000000000006 RSI: 00007ffd8f988b90 RDI: 0000000000000004
RBP: 00007ffd8f988ce0 R08: 0000000000000000 R09: 000000000000000d
R10: 00000000ffffffff R11: 0000000000000293 R12: 00007ffd8f988b90
R13: 0000000000000001 R14: ffffffffffffffff R15: 0000000000000000
task:sd-resolve      state:S stack:28840 pid: 2709 ppid:     1 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 schedule_timeout+0x1db/0x250 kernel/time/timer.c:1868
 __skb_wait_for_more_packets+0x35b/0x5e0 net/core/datagram.c:122
 unix_dgram_recvmsg+0x1ff/0xb60 net/unix/af_unix.c:2113
 sock_recvmsg_nosec net/socket.c:888 [inline]
 sock_recvmsg net/socket.c:906 [inline]
 sock_recvmsg net/socket.c:902 [inline]
 __sys_recvfrom+0x248/0x3a0 net/socket.c:2034
 __do_sys_recvfrom net/socket.c:2052 [inline]
 __se_sys_recvfrom net/socket.c:2048 [inline]
 __x64_sys_recvfrom+0xdd/0x1b0 net/socket.c:2048
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f71e0aff51f
RSP: 002b:00007f71de27aaa0 EFLAGS: 00000246 ORIG_RAX: 000000000000002d
RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f71e0aff51f
RDX: 0000000000002800 RSI: 00007f71de27aca0 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000002800 R14: 00007f71de27aca0 R15: 00007f71de27fca0
task:dhclient        state:S stack:27712 pid: 2710 ppid:     1 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 schedule_hrtimeout_range_clock+0x195/0x380 kernel/time/hrtimer.c:2157
 poll_schedule_timeout.constprop.0+0x107/0x1e0 fs/select.c:243
 do_select+0x11e2/0x1690 fs/select.c:603
 core_sys_select+0x3c3/0x9c0 fs/select.c:677
 kern_select+0x13d/0x1c0 fs/select.c:718
 __do_sys_select fs/select.c:725 [inline]
 __se_sys_select fs/select.c:722 [inline]
 __x64_sys_select+0xba/0x150 fs/select.c:722
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f54e63c45e3
RSP: 002b:00007ffe52b66b68 EFLAGS: 00000246 ORIG_RAX: 0000000000000017
RAX: ffffffffffffffda RBX: 00007f54e6ea7010 RCX: 00007f54e63c45e3
RDX: 00007f54e6ea6210 RSI: 00007f54e6ea6110 RDI: 0000000000000007
RBP: 00007ffe52b66ba8 R08: 00007ffe52b66bc0 R09: 0000000000000ae8
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe52b66bc0
R13: 00007ffe52b66bb0 R14: 00007ffe52b66bb8 R15: 0000000000000000
task:rsyslogd        state:S stack:23848 pid: 4267 ppid:     1 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 schedule_hrtimeout_range_clock+0x195/0x380 kernel/time/hrtimer.c:2157
 poll_schedule_timeout.constprop.0+0x107/0x1e0 fs/select.c:243
 do_select+0x11e2/0x1690 fs/select.c:603
 core_sys_select+0x3c3/0x9c0 fs/select.c:677
 kern_select+0x13d/0x1c0 fs/select.c:718
 __do_sys_select fs/select.c:725 [inline]
 __se_sys_select fs/select.c:722 [inline]
 __x64_sys_select+0xba/0x150 fs/select.c:722
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f9c78ca7603
RSP: 002b:00007fff115c0590 EFLAGS: 00000293 ORIG_RAX: 0000000000000017
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9c78ca7603
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 000055868a879040 R08: 00007fff115c05b0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fff115c05b0
R13: 000055868a879008 R14: 00007fff115c05a8 R15: 0000000000000000
task:in:imuxsock     state:S stack:27832 pid: 4271 ppid:     1 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 schedule_hrtimeout_range_clock+0x333/0x380 kernel/time/hrtimer.c:2148
 poll_schedule_timeout.constprop.0+0x107/0x1e0 fs/select.c:243
 do_select+0x11e2/0x1690 fs/select.c:603
 core_sys_select+0x3c3/0x9c0 fs/select.c:677
 kern_select+0x13d/0x1c0 fs/select.c:718
 __do_sys_select fs/select.c:725 [inline]
 __se_sys_select fs/select.c:722 [inline]
 __x64_sys_select+0xba/0x150 fs/select.c:722
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f9c78ca7603
RSP: 002b:00007f9c77956d20 EFLAGS: 00000293 ORIG_RAX: 0000000000000017
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f9c78ca7603
RDX: 0000000000000000 RSI: 00007f9c77956d40 RDI: 0000000000000004
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000004000001
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 0000000000000001 R14: 00007f9c77956d40 R15: 0000000000000003
task:in:imklog       state:R  running task     stack:26056 pid: 4272 ppid:     1 flags:0x00000008
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:7366 [inline]
 sched_show_task+0x44c/0x5a0 kernel/sched/core.c:7340
 show_state_filter+0xf4/0x2e0 kernel/sched/core.c:7409
 k_spec drivers/tty/vt/keyboard.c:660 [inline]
 k_spec+0xe1/0x130 drivers/tty/vt/keyboard.c:649
 kbd_keycode drivers/tty/vt/keyboard.c:1512 [inline]
 kbd_event+0xc64/0x1750 drivers/tty/vt/keyboard.c:1531
 input_to_handler+0x3b9/0x4c0 drivers/input/input.c:118
 input_pass_values.part.0+0x28d/0x700 drivers/input/input.c:145
 input_pass_values drivers/input/input.c:181 [inline]
 input_repeat_key+0x283/0x380 drivers/input/input.c:194

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/05/05 06:52 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 4a0225c3d208 06c27ff5 .config console log report info ci2-upstream-usb INFO: rcu detected stall in proc_reg_read
* Struck through repros no longer work on HEAD.