INFO: task kworker/1:4:5235 blocked for more than 143 seconds. Not tainted 6.11.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:4 state:D stack:21008 pid:5235 tgid:5235 ppid:2 flags:0x00004000 Workqueue: events drain_vmap_area_work 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 __purge_vmap_area_lazy+0x80a/0xae0 mm/vmalloc.c:2299 drain_vmap_area_work+0x27/0x40 mm/vmalloc.c:2324 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Showing all locks held in the system: 5 locks held by kworker/0:1/9: 6 locks held by ksoftirqd/0/16: 1 lock held by khungtaskd/30: #0: ffffffff8e9382a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #0: ffffffff8e9382a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8e9382a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6620 5 locks held by kworker/u8:4/61: 3 locks held by kworker/1:2/934: #0: ffff888015878948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] ffff888015878948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc900038a7d00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc900038a7d00 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fc81688 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104 2 locks held by getty/4975: #0: ffff88802b5130a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211 2 locks held by kworker/0:3/5229: 5 locks held by kworker/u9:2/5230: #0: ffff88806faad148 ((wq_completion)hci3 ){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] ){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90003ee7d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] ffffc90003ee7d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffff88804dcb8d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:327 #3: ffff88804dcb8078 (&hdev->lock){+.+.}-{3:3}, at: hci_abort_conn_sync+0x1ea/0xde0 net/bluetooth/hci_sync.c:5512 #4: ffffffff8fdecfa8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1962 [inline] #4: ffffffff8fdecfa8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_failed+0x185/0x340 net/bluetooth/hci_conn.c:1265 3 locks held by kworker/1:4/5235: #0: ffff888015878948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff888015878948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90003e77d00 (drain_vmap_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc90003e77d00 (drain_vmap_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8ea2d5e8 ( vmap_purge_lock ){+.+.}-{3:3}, at: drain_vmap_area_work+0x17/0x40 mm/vmalloc.c:2323 5 locks held by kworker/u9:4/5239: #0: ffff88802d4f0148 ( (wq_completion)hci1 ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3206 [inline] , at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90003dd7d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc90003dd7d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffff88804dcbcd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:327 #3: ffff88804dcbc078 (&hdev->lock){+.+.}-{3:3}, at: hci_abort_conn_sync+0x1ea/0xde0 net/bluetooth/hci_sync.c:5512 #4: ffffffff8fdecfa8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1962 [inline] #4: ffffffff8fdecfa8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_failed+0x185/0x340 net/bluetooth/hci_conn.c:1265 8 locks held by kworker/0:4/5292: 3 locks held by kworker/0:6/5361: 3 locks held by kworker/u8:9/5368: #0: ffff88802aa5d148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff88802aa5d148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90003f97d00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work) ){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] ){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fc81688 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4734 5 locks held by kworker/u8:12/6668: #0: ffff8880166e5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff8880166e5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90003a07d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc90003a07d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fc74b10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594 #3: ffffffff8fc81688 (rtnl_mutex ){+.+.}-{3:3}, at: cleanup_net+0x6af/0xcc0 net/core/net_namespace.c:630 #4: ffff8880166e6948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_remove_by_name_ns+0x7a/0x160 fs/kernfs/dir.c:1689 3 locks held by kworker/u8:15/9740: 2 locks held by kworker/0:0/9817: 6 locks held by kworker/u9:0/11416: #0: ffff88803a7fa148 ((wq_completion)hci4){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] ffff88803a7fa148 ((wq_completion)hci4){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90003c67d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc90003c67d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffff88805f794d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:327 #3: ffff88805f794078 (&hdev->lock){+.+.}-{3:3}, at: hci_abort_conn_sync+0x1ea/0xde0 net/bluetooth/hci_sync.c:5512 #4: ffffffff8fdecfa8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1962 [inline] #4: ffffffff8fdecfa8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_failed+0x185/0x340 net/bluetooth/hci_conn.c:1265 #5: ffffffff8e93d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:296 [inline] #5: ffffffff8e93d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:958 4 locks held by kworker/u9:1/11417: #0: ffff88807ad96948 ((wq_completion)hci8#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff88807ad96948 ((wq_completion)hci8#2){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90003c57d00 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc90003c57d00 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffff888035fcc078 (&hdev->lock){+.+.}-{3:3}, at: hci_conn_complete_evt+0xcd/0x1440 net/bluetooth/hci_event.c:3076 #3: ffff8880166e6948 (&root->kernfs_rwsem ){++++}-{3:3}, at: kernfs_add_one+0x9a/0x8b0 fs/kernfs/dir.c:778 4 locks held by syz-executor/11491: #0: ffff88802ffca420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline] (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586 #1: ffff888070acf888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1eb/0x500 fs/kernfs/file.c:325 #2: ffff888022f99f08 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20f/0x500 fs/kernfs/file.c:326 #3: ffffffff8f51e4c8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 4 locks held by syz-executor/11493: #0: ffff88802ffca420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline] #0: ffff88802ffca420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586 #1: ffff88802f17b888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1eb/0x500 fs/kernfs/file.c:325 #2: ffff888022f99f08 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20f/0x500 fs/kernfs/file.c:326 #3: ffffffff8f51e4c8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 7 locks held by syz-executor/11496: #0: ffff88802ffca420 ( sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline] sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586 #1: ffff8880715a5088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1eb/0x500 fs/kernfs/file.c:325 #2: ffff888022f99f08 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20f/0x500 fs/kernfs/file.c:326 #3: ffffffff8f51e4c8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 #4: ffff8880167720e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #4: ffff8880167720e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1094 [inline] #4: ffff8880167720e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1292 #5: ffff888016774250 (&devlink->lock_key#43){+.+.}-{3:3}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1672 #6: ffffffff8fc81688 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x71/0x5c0 drivers/net/netdevsim/netdev.c:773 1 lock held by syz-executor/11521: #0: ffffffff8fc81688 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] ffffffff8fc81688 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644 1 lock held by syz-executor/11524: #0: ffffffff8fc81688 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] (rtnl_mutex){+.+.}-{3:3}, at: __rtnl_newlink net/core/rtnetlink.c:3720 [inline] (rtnl_mutex){+.+.}-{3:3}, at: rtnl_newlink+0xab7/0x20a0 net/core/rtnetlink.c:3743 1 lock held by syz-executor/11529: #0: ffffffff8fc81688 (rtnl_mutex ){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] ){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644 1 lock held by syz-executor/11542: #0: ffffffff8fc81688 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fc81688 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644 1 lock held by syz-executor/11545: #0: ffffffff8fc81688 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fc81688 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644 1 lock held by syz-executor/11547: #0: ffffffff8fc81688 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] ffffffff8fc81688 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644 1 lock held by syz-executor/11550: #0: ffff8880166e6948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 1 lock held by syz-executor/11551: #0: ffff8880166e6948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 1 lock held by syz-executor/11552: #0: ffff8880166e6948 ( &root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 1 lock held by syz-executor/11553: #0: ffff8880166e6948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 1 lock held by syz-executor/11554: #0: ffff8880166e6948 ( &root->kernfs_rwsem ){++++}-{3:3}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 1 lock held by syz-executor/11555: #0: ffff8880166e6948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc2-syzkaller #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+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 9817 Comm: kworker/0:0 Not tainted 6.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Workqueue: events_power_efficient neigh_periodic_work RIP: 0010:put_dec_trunc8+0x6e/0x330 lib/vsprintf.c:232 Code: ec 20 41 6b dc 9c 01 eb bf 64 00 00 00 89 de e8 e8 d4 e3 f5 83 fb 63 0f 87 82 02 00 00 e8 9a d0 e3 f5 48 8d 9c 1b 20 f6 33 8d <48> 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 b7 01 00 00 0f b7 RSP: 0018:ffffc900000068e8 EFLAGS: 00000046 RAX: ffffffff8bafa656 RBX: ffffffff8d33f646 RCX: ffff88807e318000 RDX: 0000000080010102 RSI: 0000000000000013 RDI: 0000000000000064 RBP: 00000000000003fb R08: ffffffff8bafa648 R09: ffffc900000069a0 R10: dffffc0000000000 R11: fffff52000000d37 R12: 000000000000000a R13: dffffc0000000000 R14: ffffc900000069a0 R15: ffffc90000006d81 FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c2a95af CR3: 000000000e734000 CR4: 0000000000350ef0 Call Trace: number+0x337/0xf90 lib/vsprintf.c:511 vsnprintf+0x1542/0x1da0 lib/vsprintf.c:2890 sprintf+0xda/0x120 lib/vsprintf.c:3028 print_time kernel/printk/printk.c:1330 [inline] info_print_prefix+0x16b/0x310 kernel/printk/printk.c:1356 record_print_text kernel/printk/printk.c:1405 [inline] printk_get_next_message+0x6da/0xbe0 kernel/printk/printk.c:2910 console_emit_next_record kernel/printk/printk.c:2950 [inline] console_flush_all+0x410/0xfd0 kernel/printk/printk.c:3049 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3118 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2348 _printk+0xd5/0x120 kernel/printk/printk.c:2373 int_irq+0x1bd/0x250 drivers/media/usb/gspca/gspca.c:104 __usb_hcd_giveback_urb+0x42e/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+0x59d/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+0x112/0x3f0 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:note_gp_changes+0x2bf/0x360 kernel/rcu/tree.c:1322 Code: 40 42 80 3c 23 00 74 08 4c 89 f7 e8 db 06 80 00 f6 44 24 41 02 75 4f 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 20 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 66 43 c7 44 3c 09 00 00 43 c6 44 3c 0b 00 RSP: 0018:ffffc90000007bc0 EFLAGS: 00000206 RAX: c5d533dc9d552e00 RBX: 1ffff92000000f80 RCX: ffffffff81702eca RDX: dffffc0000000000 RSI: ffffffff8c0ad540 RDI: ffffffff8c605cc0 RBP: ffffc90000007c90 R08: ffffffff9372c89f R09: 1ffffffff26e5913 R10: dffffc0000000000 R11: fffffbfff26e5914 R12: dffffc0000000000 R13: 0000000000000246 R14: ffffc90000007c00 R15: 1ffff92000000f7c rcu_check_quiescent_state kernel/rcu/tree.c:2453 [inline] rcu_core+0x2e4/0x1830 kernel/rcu/tree.c:2827 handle_softirqs+0x2c6/0x970 kernel/softirq.c:554 do_softirq+0x11b/0x1e0 kernel/softirq.c:455 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382 neigh_periodic_work+0xb35/0xd50 net/core/neighbour.c:1019 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting gspca_pac7302 6-1:0.0: URB error -71, resubmitting