INFO: task khugepaged:38 blocked for more than 143 seconds. Not tainted 6.10.0-syzkaller-12710-g3a7e02c040b1 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:khugepaged state:D stack:25560 pid:38 tgid:38 ppid:2 flags:0x00004000 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_timeout+0xb0/0x310 kernel/time/timer.c:2557 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x355/0x620 kernel/sched/completion.c:148 __flush_work+0xaa9/0xd00 kernel/workqueue.c:4208 __lru_add_drain_all+0x4f6/0x560 mm/swap.c:920 khugepaged_do_scan mm/khugepaged.c:2501 [inline] khugepaged+0x1bb/0x1dc0 mm/khugepaged.c:2570 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 INFO: task udevd:6458 blocked for more than 144 seconds. Not tainted 6.10.0-syzkaller-12710-g3a7e02c040b1 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:21632 pid:6458 tgid:6458 ppid:4677 flags:0x00000002 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 device_lock include/linux/device.h:1009 [inline] uevent_show+0x17d/0x340 drivers/base/core.c:2743 dev_attr_show+0x55/0xc0 drivers/base/core.c:2437 sysfs_kf_seq_show+0x331/0x4c0 fs/sysfs/file.c:59 seq_read_iter+0x445/0xd60 fs/seq_file.c:230 new_sync_read fs/read_write.c:395 [inline] vfs_read+0x9bd/0xbc0 fs/read_write.c:476 ksys_read+0x1a0/0x2c0 fs/read_write.c:619 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f916cb16b6a RSP: 002b:00007ffc5da8d298 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 000055f5ef5c9730 RCX: 00007f916cb16b6a RDX: 0000000000001000 RSI: 000055f5ef5e6930 RDI: 0000000000000008 RBP: 000055f5ef5c9730 R08: 0000000000000008 R09: 0000000000000008 R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000003fff R14: 00007ffc5da8d778 R15: 000000000000000a Showing all locks held in the system: 6 locks held by kworker/u8:1/12: #0: ffff8880166e5948 ( (wq_completion)netns ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3206 [inline] , at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90000117d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fc71bd0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594 #3: ffff888065e6c0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #3: ffff888065e6c0e8 (&dev->mutex){....}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline] #3: ffff888065e6c0e8 (&dev->mutex){....}-{3:3}, at: devlink_pernet_pre_exit+0x13b/0x440 net/devlink/core.c:506 #4: ffff888065e6a250 (&devlink->lock_key#102){+.+.}-{3:3}, at: devl_lock net/devlink/core.c:276 [inline] ffff888065e6a250 (&devlink->lock_key#102){+.+.}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline] ffff888065e6a250 (&devlink->lock_key#102){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0x14d/0x440 net/devlink/core.c:506 #5: ffffffff8fc7e748 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x71/0x5c0 drivers/net/netdevsim/netdev.c:773 2 locks held by kworker/1:0/25: 1 lock held by khungtaskd/30: #0: ffffffff8e937660 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #0: ffffffff8e937660 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8e937660 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6620 1 lock held by khugepaged/38: #0: ffffffff8e9f1a68 (lock#3){+.+.}-{3:3} , at: __lru_add_drain_all+0x66/0x560 mm/swap.c:875 2 locks held by kworker/1:2/58: 4 locks held by kworker/1:1H/59: 2 locks held by getty/4982: #0: ffff88802ba170a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 3 locks held by kworker/0:3/5226: #0: ffff888015880948 ( (wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] (wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc9000394fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] ffffc9000394fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fc7e748 ( rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276 6 locks held by kworker/1:3/5236: 3 locks held by kworker/1:5/5275: 4 locks held by udevd/6458: #0: ffff888042c3f790 ( &p->lock ){+.+.}-{3:3} , at: seq_read_iter+0xb7/0xd60 fs/seq_file.c:182 #1: ffff8880637abc88 ( &of->mutex #2 ){+.+.}-{3:3} , at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154 #2: ffff88801f26ea58 ( kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155 #3: ffff888060594190 ( &dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:1009 [inline] , at: uevent_show+0x17d/0x340 drivers/base/core.c:2743 3 locks held by kworker/u8:2/23768: #0: ffff88802ae17148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc9000d497d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc9000d497d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fc7e748 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4194 8 locks held by kworker/1:1/23912: 1 lock held by syz-executor/26204: #0: ffffffff8fc7e748 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline] #0: ffffffff8fc7e748 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3510 2 locks held by syz-executor/26807: #0: ffffffff8fc7e748 ( rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline] rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3510 #1: ffffffff8e93ca38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:296 [inline] #1: ffffffff8e93ca38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:958 1 lock held by syz-executor/27144: #0: ffffffff8fc7e748 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fc7e748 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644 1 lock held by syz-executor/27145: #0: ffffffff8fc7e748 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] ffffffff8fc7e748 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644 1 lock held by syz-executor/27147: #0: ffffffff8fc7e748 ( rtnl_mutex ){+.+.}-{3:3} , at: rtnl_lock net/core/rtnetlink.c:79 [inline] , at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644 1 lock held by syz-executor/27148: #0: ffffffff8fc7e748 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] ffffffff8fc7e748 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644 1 lock held by syz-executor/27146: #0: ffffffff8fc7e748 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644 2 locks held by syz-executor/27163: #0: ffffffff8fc71bd0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8fc7e748 ( rtnl_mutex ){+.+.}-{3:3} , at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3872 2 locks held by syz-executor/27165: #0: ffffffff8fc71bd0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8fc7e748 ( rtnl_mutex ){+.+.}-{3:3} , at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3872 2 locks held by syz-executor/27166: #0: ffffffff8fc71bd0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8fc7e748 (rtnl_mutex){+.+.}-{3:3} , at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3872 2 locks held by syz-executor/27169: #0: ffffffff8fc71bd0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8fc7e748 (rtnl_mutex){+.+.}-{3:3} , at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3872 2 locks held by syz-executor/27170: #0: ffffffff8fc71bd0 ( pernet_ops_rwsem ){++++}-{3:3} , at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8fc7e748 ( rtnl_mutex){+.+.}-{3:3} , at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3872 2 locks held by syz-executor/27179: #0: ffffffff8fc71bd0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8fc7e748 ( rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3872 2 locks held by syz-executor/27183: #0: ffffffff8fc71bd0 ( pernet_ops_rwsem){++++}-{3:3} , at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8fc7e748 ( rtnl_mutex ){+.+.}-{3:3} , at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3872 2 locks held by syz-executor/27186: #0: ffffffff8fc71bd0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8fc7e748 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3872 2 locks held by syz-executor/27188: #0: ffffffff8fc71bd0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8fc7e748 ( rtnl_mutex ){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3872 2 locks held by syz-executor/27190: #0: ffffffff8fc71bd0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8fc7e748 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3872 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-syzkaller-12710-g3a7e02c040b1 #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 0 to CPUs 1: yealink 2-1:36.0: unexpected response 0 NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 23912 Comm: kworker/1:1 Not tainted 6.10.0-syzkaller-12710-g3a7e02c040b1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Workqueue: events kfree_rcu_monitor RIP: 0010:io_serial_in+0x76/0xb0 drivers/tty/serial/8250/8250_port.c:406 Code: e0 62 55 fc 89 e9 41 d3 e6 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 31 9b bc fc 44 03 33 44 89 f2 ec <0f> b6 c0 5b 41 5e 41 5f 5d c3 cc cc cc cc 89 e9 80 e1 07 38 c1 7c RSP: 0018:ffffc90000a17318 EFLAGS: 00000006 RAX: 1ffffffff2a49705 RBX: ffffffff9524bf60 RCX: 0000000000000000 RDX: 00000000000003f9 RSI: 0000000000000000 RDI: 0000000000000020 RBP: 0000000000000000 R08: ffffffff853e2076 R09: fffff52000142e44 R10: dffffc0000000000 R11: ffffffff853e2030 R12: dffffc0000000000 R13: ffffffff8f12eac0 R14: 00000000000003f9 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c30adf3 CR3: 000000000e734000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: serial_port_in include/linux/serial_core.h:674 [inline] serial8250_console_write+0x2c2/0x1770 drivers/tty/serial/8250/8250_port.c:3357 console_emit_next_record kernel/printk/printk.c:2983 [inline] console_flush_all+0x865/0xfd0 kernel/printk/printk.c:3049 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3118 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2348 dev_vprintk_emit+0x2ae/0x330 drivers/base/core.c:4909 dev_printk_emit+0xdd/0x120 drivers/base/core.c:4920 _dev_err+0x122/0x170 drivers/base/core.c:4975 urb_irq_callback+0x3b7/0x5b0 drivers/input/misc/yealink.c:435 __usb_hcd_giveback_urb+0x42c/0x6e0 drivers/usb/core/hcd.c:1650 dummy_timer+0x830/0x45a0 drivers/usb/gadget/udc/dummy_hcd.c:1987 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:kasan_check_range+0x0/0x290 mm/kasan/generic.c:188 Code: c7 c6 1d 69 04 8e e8 df 2a e3 ff 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <66> 0f 1f 00 55 41 57 41 56 41 54 53 b0 01 48 85 f6 0f 84 a0 01 00 RSP: 0018:ffffc90000a183f8 EFLAGS: 00000246 RAX: 1ffff9200014314e RBX: ffff88804b9a2d9c RCX: ffffffff8b2a5d3d RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88804b9a2d9c RBP: ffffc90000a18750 R08: ffffffff8b2a5ce5 R09: ffffffff8b2a5afd R10: 0000000000000002 R11: ffff88805c7d9e00 R12: ffff888030250640 R13: dffffc0000000000 R14: ffff88804b9a0e40 R15: ffff88807b6d4840 instrument_atomic_read include/linux/instrumented.h:68 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] ieee80211_led_rx net/mac80211/led.h:16 [inline] ieee80211_rx_h_defragment net/mac80211/rx.c:2400 [inline] ieee80211_rx_handlers+0x1b5d/0xb830 net/mac80211/rx.c:4191 ieee80211_invoke_rx_handlers net/mac80211/rx.c:4238 [inline] ieee80211_prepare_and_rx_handle+0x31ab/0x6360 net/mac80211/rx.c:5086 __ieee80211_rx_handle_packet net/mac80211/rx.c:5327 [inline] ieee80211_rx_list+0x2ce0/0x3780 net/mac80211/rx.c:5462 ieee80211_rx_napi+0x18a/0x3c0 net/mac80211/rx.c:5485 ieee80211_rx include/net/mac80211.h:5124 [inline] ieee80211_handle_queued_frames+0xe7/0x1e0 net/mac80211/main.c:439 tasklet_action_common+0x321/0x4d0 kernel/softirq.c:785 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194 Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 0e 7c 3b f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 63 a1 a3 f5 65 8b 05 64 97 44 74 85 c0 74 43 48 c7 04 24 0e 36 RSP: 0018:ffffc900042b7860 EFLAGS: 00000206 RAX: 57444db040798c00 RBX: 1ffff92000856f10 RCX: ffffffff81701f3a RDX: dffffc0000000000 RSI: ffffffff8c0ad5a0 RDI: 0000000000000001 RBP: ffffc900042b78f0 R08: ffffffff9372684f R09: 1ffffffff26e4d09 R10: dffffc0000000000 R11: fffffbfff26e4d0a R12: dffffc0000000000 R13: 1ffff92000856f0c R14: ffffc900042b7880 R15: 0000000000000246 debug_object_active_state+0x239/0x360 lib/debugobjects.c:946 debug_rcu_head_unqueue kernel/rcu/rcu.h:236 [inline] debug_rcu_bhead_unqueue kernel/rcu/tree.c:3321 [inline] kvfree_rcu_bulk+0xc5/0x4e0 kernel/rcu/tree.c:3398 kvfree_rcu_drain_ready kernel/rcu/tree.c:3579 [inline] kfree_rcu_monitor+0x8a4/0x1020 kernel/rcu/tree.c:3597 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390 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 yealink 2-1:36.0: urb_ctl_callback - urb status -71 yealink 2-1:36.0: urb_irq_callback - urb status -71 yealink 2-1:36.0: unexpected response 0 yealink 2-1:36.0: urb_ctl_callback - urb status -71 yealink 2-1:36.0: urb_irq_callback - urb status -71 yealink 2-1:36.0: unexpected response 0 yealink 2-1:36.0: urb_ctl_callback - urb status -71 yealink 2-1:36.0: urb_irq_callback - urb status -71 yealink 2-1:36.0: unexpected response 0 yealink 2-1:36.0: urb_ctl_callback - urb status -71 yealink 2-1:36.0: urb_irq_callback - urb status -71