INFO: task kworker/0:0:9 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:0 state:D stack:24472 pid:9 tgid:9 ppid:2 task_flags:0x4208060 flags:0x00080000 Workqueue: 0x0 (wg-crypt-wg1) Call Trace: context_switch kernel/sched/core.c:5510 [inline] __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234 __schedule_loop kernel/sched/core.c:7311 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7326 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7383 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x7bf/0x1550 kernel/locking/mutex.c:821 worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 create_worker+0x543/0x7b0 kernel/workqueue.c:2879 maybe_create_worker kernel/workqueue.c:3121 [inline] manage_workers kernel/workqueue.c:3198 [inline] worker_thread+0x4c9/0xfb0 kernel/workqueue.c:3461 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INFO: task kworker/R-wg-cr:9763 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/R-wg-cr state:D stack:27616 pid:9763 tgid:9763 ppid:2 task_flags:0x4208060 flags:0x00080000 Workqueue: 0x0 (wg-crypt-wg0) Call Trace: context_switch kernel/sched/core.c:5510 [inline] __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234 __schedule_loop kernel/sched/core.c:7311 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7326 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7383 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x7bf/0x1550 kernel/locking/mutex.c:821 worker_detach_from_pool kernel/workqueue.c:2795 [inline] rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INFO: task kworker/R-wg-cr:10548 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/R-wg-cr state:D stack:30232 pid:10548 tgid:10548 ppid:2 task_flags:0x4208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5510 [inline] __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234 __schedule_loop kernel/sched/core.c:7311 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7326 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7383 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x7bf/0x1550 kernel/locking/mutex.c:821 set_pf_worker kernel/workqueue.c:3411 [inline] rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INFO: task kworker/0:1:10552 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:1 state:D stack:30552 pid:10552 tgid:10552 ppid:2 task_flags:0x4208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5510 [inline] __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234 __schedule_loop kernel/sched/core.c:7311 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7326 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7383 kthread+0x260/0x470 kernel/kthread.c:420 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Showing all locks held in the system: 1 lock held by kworker/0:0/9: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 3 locks held by kworker/u8:1/13: #0: ffff88801c296140 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff88801c296140 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #1: ffffc90000127c40 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffffc90000127c40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #2: ffffffff9001ef08 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf5/0x810 net/core/net_namespace.c:673 1 lock held by kworker/R-mm_pe/14: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by khungtaskd/31: #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775 1 lock held by dhcpcd/5287: #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978 2 locks held by getty/5383: #0: ffff88803685f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 drivers/tty/n_tty.c:2211 2 locks held by kworker/1:4/5742: 3 locks held by kworker/0:5/22812: #0: ffff88801b02b140 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff88801b02b140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #1: ffffc9000f5bfc40 (netdev_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffffc9000f5bfc40 (netdev_work){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #2: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: netdev_work_proc+0x6f/0x770 net/core/netdev_work.c:116 2 locks held by kworker/1:9/22819: 2 locks held by kworker/1:13/22824: 3 locks held by kworker/u8:8/3422: #0: ffff88801b06c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff88801b06c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #1: ffffc90003627c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffffc90003627c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #2: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:313 1 lock held by kworker/R-wg-cr/9173: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/9174: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/9176: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/9177: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/9178: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/9179: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 1 lock held by kworker/R-wg-cr/9185: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/9186: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/9187: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 1 lock held by kworker/R-wg-cr/9194: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/9196: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/9197: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/9198: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/9199: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/9200: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 2 locks held by kworker/1:0/9543: 10 locks held by kworker/1:1/9589: 3 locks held by kworker/1:2/9592: 1 lock held by kworker/R-bond0/9630: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xfdb/0x10b0 kernel/workqueue.c:3672 1 lock held by kworker/R-wg-cr/9763: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/9764: 1 lock held by kworker/R-wg-cr/9766: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 2 locks held by kworker/1:3/9769: 2 locks held by kworker/1:5/9773: 2 locks held by kworker/1:6/10100: 1 lock held by kworker/1:7/10425: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 1 lock held by kworker/R-wg-cr/10545: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10548: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-bond0/10582: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10590: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10592: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10596: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by syz-executor/10664: #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: tun_detach drivers/net/tun.c:634 [inline] #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x3e/0x1c0 drivers/net/tun.c:3442 5 locks held by syz-executor/10690: #0: ffff88807b810ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close net/bluetooth/hci_core.c:497 [inline] #0: ffff88807b810ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x22a/0x5b0 net/bluetooth/hci_core.c:2678 #1: ffff88807b8100b8 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x61f/0x10a0 net/bluetooth/hci_sync.c:5501 #2: ffffffff901b5300 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2151 [inline] #2: ffffffff901b5300 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0x99/0x260 net/bluetooth/hci_conn.c:2735 #3: ffff888052ff62f8 (&conn->lock#2){+.+.}-{4:4}, at: l2cap_conn_del+0x9f/0x520 net/bluetooth/l2cap_core.c:1808 #4: ffffffff8eb5ff68 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline] #4: ffffffff8eb5ff68 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770 kernel/rcu/tree_exp.h:961 1 lock held by kworker/R-bond0/10724: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10742: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10743: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10749: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-bond0/10760: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-bond0/10769: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-bond0/10775: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10776: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10778: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10782: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10793: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10795: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10797: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10800: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10801: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10802: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-bond0/10867: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10876: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10877: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/10883: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by syz.1.15902/11743: #0: ffffffff9057d300 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffffffff9057d300 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #0: ffffffff9057d300 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:570 1 lock held by kworker/R-bond1/11746: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-bond1/11776: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-nfc2_/11951: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-nfc2_/11952: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-nfc2_/11953: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by syz-executor/12008: #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8a3/0x1bd0 net/core/rtnetlink.c:4158 1 lock held by kworker/R-bond1/12023: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-bond2/12042: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-nfc3_/12059: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-nfc3_/12060: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-nfc3_/12061: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-bond0/12097: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/12114: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/12115: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 1 lock held by kworker/R-wg-cr/12116: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x80/0x10b0 kernel/workqueue.c:3594 2 locks held by syz.5.16001/12140: #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x41b/0x810 net/core/rtnetlink.c:3635 #1: ffffffff8e9e75f0 (cpu_hotplug_lock){++++}-{0:0}, at: flush_all_backlogs net/core/dev.c:6586 [inline] #1: ffffffff8e9e75f0 (cpu_hotplug_lock){++++}-{0:0}, at: unregister_netdevice_many_notify+0xcac/0x2150 net/core/dev.c:12425 2 locks held by syz.5.16001/12142: #0: ffffffff9009e468 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1217 #1: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: ethnl_default_doit+0x6c4/0x15c0 net/ethtool/netlink.c:543 1 lock held by syz.3.16002/12146: #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x767/0xc00 net/core/rtnetlink.c:7082 1 lock held by syz.3.16002/12148: #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x767/0xc00 net/core/rtnetlink.c:7082 2 locks held by syz.3.16002/12149: #0: ffffffff9059b8e0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffffffff9059b8e0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #0: ffffffff9059b8e0 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:570 #1: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #1: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #1: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8a3/0x1bd0 net/core/rtnetlink.c:4158 1 lock held by syz-executor/12152: #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #0: ffffffff9002dac0 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:122 nmi_trigger_cpumask_backtrace+0x17a/0x380 lib/nmi_backtrace.c:65 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] __sys_info lib/sys_info.c:157 [inline] sys_info+0x135/0x170 lib/sys_info.c:165 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline] watchdog+0xfd7/0x1030 kernel/hung_task.c:561 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 9589 Comm: kworker/1:1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: events_power_efficient neigh_periodic_work RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:98 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:115 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:140 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:172 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:191 [inline] RIP: 0010:kasan_check_range+0x97/0x2c0 mm/kasan/generic.c:200 Code: 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 3d 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb 41 80 3b 00 <0f> 85 9e 01 00 00 49 ff c3 48 ff c3 75 ee e9 1d 01 00 00 44 89 dd RSP: 0018:ffffc90000a08188 EFLAGS: 00000246 RAX: 0000000000000001 RBX: fffffffffffffffd RCX: ffffffff8a9399e5 RDX: 0000000000000001 RSI: 0000000000000020 RDI: ffffc90000a08330 RBP: 0000000000000000 R08: ffffc90000a0834f R09: 1ffff92000141069 R10: dffffc0000000000 R11: fffff52000141067 R12: 0000000000000004 R13: dffffc0000000000 R14: fffff5200014106a R15: 1ffff92000141066 FS: 0000000000000000(0000) GS:ffff88812504d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa6179aae9c CR3: 000000000e946000 CR4: 00000000003526f0 Call Trace: __asan_memset+0x22/0x50 mm/kasan/shadow.c:84 ip6t_do_table+0xd5/0x15b0 net/ipv6/netfilter/ip6_tables.c:261 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619 nf_hook include/linux/netfilter.h:273 [inline] __ip6_local_out+0x819/0x940 net/ipv6/output_core.c:116 ip6_local_out+0x2a/0x190 net/ipv6/output_core.c:126 ipvlan_process_v6_outbound drivers/net/ipvlan/ipvlan_core.c:522 [inline] ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:563 [inline] ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline] ipvlan_queue_xmit+0xa76/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693 ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:226 __netdev_start_xmit include/linux/netdevice.h:5400 [inline] netdev_start_xmit include/linux/netdevice.h:5409 [inline] xmit_one net/core/dev.c:3889 [inline] dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3905 sch_direct_xmit+0x257/0x4c0 net/sched/sch_generic.c:372 qdisc_restart net/sched/sch_generic.c:437 [inline] __qdisc_run+0xb11/0x1620 net/sched/sch_generic.c:445 qdisc_run include/net/pkt_sched.h:120 [inline] __dev_xmit_skb net/core/dev.c:4224 [inline] __dev_queue_xmit+0xfd6/0x3820 net/core/dev.c:4836 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip6_output+0x337/0x540 net/ipv6/ip6_output.c:246 ipvlan_process_v6_outbound drivers/net/ipvlan/ipvlan_core.c:522 [inline] ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:563 [inline] ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline] ipvlan_queue_xmit+0xa76/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693 ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:226 __netdev_start_xmit include/linux/netdevice.h:5400 [inline] netdev_start_xmit include/linux/netdevice.h:5409 [inline] xmit_one net/core/dev.c:3889 [inline] dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3905 sch_direct_xmit+0x257/0x4c0 net/sched/sch_generic.c:372 qdisc_restart net/sched/sch_generic.c:437 [inline] __qdisc_run+0xb11/0x1620 net/sched/sch_generic.c:445 qdisc_run include/net/pkt_sched.h:120 [inline] net_tx_action+0x7cb/0xc30 net/core/dev.c:5863 handle_softirqs+0x225/0x840 kernel/softirq.c:622 do_softirq+0x76/0xd0 kernel/softirq.c:523 __local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450 spin_unlock_bh include/linux/spinlock.h:396 [inline] neigh_periodic_work+0xc23/0xe40 net/core/neighbour.c:1035 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245