INFO: task kworker/u8:3:52 blocked for more than 152 seconds. Not tainted 6.10.0-rc5-next-20240624-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:3 state:D stack:22896 pid:52 tgid:52 ppid:2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:5249 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6597 __schedule_loop kernel/sched/core.c:6674 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6689 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6746 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4193 process_one_work kernel/workqueue.c:3224 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3305 worker_thread+0x86d/0xd40 kernel/workqueue.c:3383 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task kworker/1:2:4505 blocked for more than 153 seconds. Not tainted 6.10.0-rc5-next-20240624-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:2 state:D stack:25304 pid:4505 tgid:4505 ppid:2 flags:0x00004000 Workqueue: events request_firmware_work_func Call Trace: context_switch kernel/sched/core.c:5249 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6597 __schedule_loop kernel/sched/core.c:6674 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6689 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6746 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 regdb_fw_cb+0x82/0x1c0 net/wireless/reg.c:1017 request_firmware_work_func+0x1a4/0x280 drivers/base/firmware_loader/main.c:1167 process_one_work kernel/workqueue.c:3224 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3305 worker_thread+0x86d/0xd40 kernel/workqueue.c:3383 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Showing all locks held in the system: 2 locks held by kworker/0:1/9: #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline] #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305 #1: ffffc900000e7d00 (free_ipc_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline] #1: ffffc900000e7d00 (free_ipc_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305 6 locks held by kworker/1:0/25: 1 lock held by khungtaskd/30: #0: ffffffff8e335620 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:333 [inline] #0: ffffffff8e335620 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:845 [inline] #0: ffffffff8e335620 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6688 3 locks held by kworker/u8:3/52: #0: ffff888029a47148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline] #0: ffff888029a47148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305 #1: ffffc90000bc7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline] #1: ffffc90000bc7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305 #2: ffffffff8f5f8ac8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4193 3 locks held by kworker/u9:0/54: #0: ffff888063afe148 ((wq_completion)hci7){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline] #0: ffff888063afe148 ((wq_completion)hci7){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305 #1: ffffc90000be7d00 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline] #1: ffffc90000be7d00 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305 #2: ffff88802481cd88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_open net/bluetooth/hci_core.c:483 [inline] #2: ffff88802481cd88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_power_on+0x1bf/0x6b0 net/bluetooth/hci_core.c:1009 3 locks held by kworker/0:2/928: 2 locks held by kworker/u8:6/1099: 5 locks held by kworker/u8:7/2452: 3 locks held by kworker/u9:1/4488: #0: ffff88806f216948 ((wq_completion)hci8){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline] #0: ffff88806f216948 ((wq_completion)hci8){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305 #1: ffffc9000d24fd00 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline] #1: ffffc9000d24fd00 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305 #2: ffff888024a18d88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_open net/bluetooth/hci_core.c:483 [inline] #2: ffff888024a18d88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_power_on+0x1bf/0x6b0 net/bluetooth/hci_core.c:1009 3 locks held by kworker/1:2/4505: #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline] #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305 #1: ffffc9000d26fd00 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline] #1: ffffc9000d26fd00 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305 #2: ffffffff8f5f8ac8 (rtnl_mutex){+.+.}-{3:3}, at: regdb_fw_cb+0x82/0x1c0 net/wireless/reg.c:1017 2 locks held by getty/4847: #0: ffff88802f4920a0 (&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+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 2 locks held by kworker/1:3/5081: 3 locks held by syz-executor/5090: #0: ffff8880219b0d88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:554 [inline] #0: ffff8880219b0d88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2761 #1: ffff8880219b0078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x494/0xf70 net/bluetooth/hci_sync.c:5048 #2: ffffffff8f7661c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1979 [inline] #2: ffffffff8f7661c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2584 5 locks held by kworker/u9:2/5092: #0: ffff88805d9b5148 ((wq_completion)hci5){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline] #0: ffff88805d9b5148 ((wq_completion)hci5){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305 #1: ffffc9000378fd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline] #1: ffffc9000378fd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305 #2: ffff8880219b4d88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:309 #3: ffff8880219b4078 (&hdev->lock){+.+.}-{3:3}, at: hci_abort_conn_sync+0x1ea/0xde0 net/bluetooth/hci_sync.c:5429 #4: ffffffff8f7661c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1964 [inline] #4: ffffffff8f7661c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_failed+0x185/0x340 net/bluetooth/hci_conn.c:1257 3 locks held by syz-executor/5093: #0: ffff88801cff4d88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:554 [inline] #0: ffff88801cff4d88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2761 #1: ffff88801cff4078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x494/0xf70 net/bluetooth/hci_sync.c:5048 #2: ffffffff8f7661c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1979 [inline] #2: ffffffff8f7661c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2584 3 locks held by syz-executor/5094: #0: ffff88801cff0d88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:554 [inline] #0: ffff88801cff0d88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2761 #1: ffff88801cff0078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x494/0xf70 net/bluetooth/hci_sync.c:5048 #2: ffffffff8f7661c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1979 [inline] #2: ffffffff8f7661c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2584 3 locks held by kworker/u9:4/5096: 3 locks held by kworker/u9:6/5104: 5 locks held by kworker/u9:7/5105: #0: ffff888023b64948 ((wq_completion)hci6){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline] #0: ffff888023b64948 ((wq_completion)hci6){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305 #1: ffffc90003c1fd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline] #1: ffffc90003c1fd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305 #2: ffff888020a18d88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:309 #3: ffff888020a18078 (&hdev->lock){+.+.}-{3:3}, at: hci_abort_conn_sync+0x1ea/0xde0 net/bluetooth/hci_sync.c:5429 #4: ffffffff8f7661c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1964 [inline] #4: ffffffff8f7661c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_failed+0x185/0x340 net/bluetooth/hci_conn.c:1257 3 locks held by kworker/1:4/5140: #0: ffff888015081948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline] #0: ffff888015081948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305 #1: ffffc900037dfd00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline] #1: ffffc900037dfd00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305 #2: ffffffff8f5f8ac8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x99/0xfd0 net/wireless/reg.c:2480 1 lock held by syz.3.28/5250: #0: ffffffff8f5f8ac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x839/0x1170 net/core/rtnetlink.c:6723 1 lock held by dhcpcd/5257: #0: ffff888079786208 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline] #0: ffff888079786208 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline] #0: ffff888079786208 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1421 1 lock held by dhcpcd/5258: #0: ffff8880780d0e08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline] #0: ffff8880780d0e08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline] #0: ffff8880780d0e08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1421 1 lock held by dhcpcd/5259: #0: ffff88807802ca08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline] #0: ffff88807802ca08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline] #0: ffff88807802ca08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1421 1 lock held by dhcpcd/5260: #0: ffff888078027408 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline] #0: ffff888078027408 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline] #0: ffff888078027408 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1421 2 locks held by dhcpcd/5263: #0: ffff888078024a08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline] #0: ffff888078024a08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline] #0: ffff888078024a08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1421 #1: ffffffff8e33a9f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #1: ffffffff8e33a9f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:959 1 lock held by dhcpcd/5264: #0: ffff888078023e08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline] #0: ffff888078023e08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline] #0: ffff888078023e08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1421 1 lock held by syz-executor/5265: #0: ffffffff8f5f8ac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x839/0x1170 net/core/rtnetlink.c:6723 1 lock held by syz-executor/5268: #0: ffffffff8f5f8ac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x839/0x1170 net/core/rtnetlink.c:6723 1 lock held by syz-executor/5273: ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc5-next-20240624-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 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:144 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 25 Comm: kworker/1:0 Not tainted 6.10.0-rc5-next-20240624-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: events __sched_core_put RIP: 0010:kasan_check_range+0x1be/0x290 mm/kasan/generic.c:189 Code: 07 48 85 ed 48 0f 49 dd 48 83 e3 f8 48 29 dd 74 12 41 80 3b 00 0f 85 a6 00 00 00 49 ff c3 48 ff cd 75 ee 5b 41 5c 41 5e 41 5f <5d> c3 cc cc cc cc 40 84 ed 75 5f f7 c5 00 ff 00 00 75 5c f7 c5 00 RSP: 0018:ffffc90000a18b10 EFLAGS: 00000056 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff816f6054 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8faeec68 RBP: 0000000000000000 R08: ffffffff8faeec6f R09: 1ffffffff1f5dd8d R10: dffffc0000000000 R11: fffffbfff1f5dd8e R12: 1ffff9200014316c R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880176fa8c8 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6b37304038 CR3: 0000000067164000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] cpumask_test_cpu include/linux/cpumask.h:559 [inline] cpu_online include/linux/cpumask.h:1099 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0xd4/0x550 kernel/locking/lockdep.c:5787 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] advance_sched+0xab/0xca0 net/sched/sch_taprio.c:924 __run_hrtimer kernel/time/hrtimer.c:1687 [inline] __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1751 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1813 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+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:arch_atomic64_read arch/x86/include/asm/atomic64_64.h:15 [inline] RIP: 0010:raw_atomic64_read include/linux/atomic/atomic-arch-fallback.h:2583 [inline] RIP: 0010:raw_atomic_long_read include/linux/atomic/atomic-long.h:38 [inline] RIP: 0010:atomic_long_read include/linux/atomic/atomic-instrumented.h:3189 [inline] RIP: 0010:__mutex_owner kernel/locking/mutex.c:81 [inline] RIP: 0010:mutex_spin_on_owner+0x275/0x330 kernel/locking/mutex.c:359 Code: e8 40 81 8b 00 49 f7 06 01 00 00 00 0f 85 8b 00 00 00 f3 90 4c 89 f7 be 08 00 00 00 e8 94 83 8b 00 48 8b 44 24 20 80 3c 18 00 <0f> 84 88 fe ff ff 4c 89 f7 e8 0d 81 8b 00 e9 7b fe ff ff 48 8b 4c RSP: 0018:ffffc900001f7978 EFLAGS: 00000246 RAX: 1ffffffff1c7c9cc RBX: dffffc0000000000 RCX: ffffffff816e93dc RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e3e4e60 RBP: ffff88802962da00 R08: ffffffff8e3e4e67 R09: 1ffffffff1c7c9cc R10: dffffc0000000000 R11: fffffbfff1c7c9cd R12: 0000000000000010 R13: ffffffff8e3e4ef0 R14: ffffffff8e3e4e60 R15: ffffffff8e3e4eb0 mutex_optimistic_spin kernel/locking/mutex.c:476 [inline] __mutex_lock_common kernel/locking/mutex.c:612 [inline] __mutex_lock+0x2cb/0xd70 kernel/locking/mutex.c:752 jump_label_lock kernel/jump_label.c:27 [inline] static_key_disable_cpuslocked+0x9b/0x1c0 kernel/jump_label.c:238 static_key_disable+0x1a/0x20 kernel/jump_label.c:248 __sched_core_disable kernel/sched/core.c:421 [inline] __sched_core_put+0xee/0x120 kernel/sched/core.c:441 process_one_work kernel/workqueue.c:3224 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3305 worker_thread+0x86d/0xd40 kernel/workqueue.c:3383 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 DEBUG: waiting rtnl_mutex for 16560 jiffies. task:kworker/u8:3 state:D stack:22896 pid:52 tgid:52 ppid:2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:5249 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6597 __schedule_loop kernel/sched/core.c:6674 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6689 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6746 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4193 process_one_work kernel/workqueue.c:3224 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3305 worker_thread+0x86d/0xd40 kernel/workqueue.c:3383 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 DEBUG: holding rtnl_mutex for 16561 jiffies. task:syz.3.28 state:D stack:24128 pid:5250 tgid:5248 ppid:5099 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5249 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6597 __schedule_loop kernel/sched/core.c:6674 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6689 exp_funnel_lock kernel/rcu/tree_exp.h:320 [inline] synchronize_rcu_expedited+0x70a/0x830 kernel/rcu/tree_exp.h:959 synchronize_rcu+0x11b/0x360 kernel/rcu/tree.c:3975 lockdep_unregister_key+0x4b7/0x540 kernel/locking/lockdep.c:6541 __qdisc_destroy+0x165/0x410 net/sched/sch_generic.c:1079 taprio_attach+0x24e/0x390 net/sched/sch_taprio.c:2146 qdisc_graft+0x128a/0x1580 net/sched/sch_api.c:1176 tc_modify_qdisc+0xf47/0x1e40 net/sched/sch_api.c:1788 rtnetlink_rcv_msg+0x892/0x1170 net/core/rtnetlink.c:6726 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901