INFO: task kworker/0:2:942 blocked for more than 146 seconds. Not tainted 6.10.0-syzkaller-12881-g6342649c33d2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:22896 pid:942 tgid:942 ppid:2 flags:0x00004000 Workqueue: events drain_vmap_area_work Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2557 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x3de/0x5f0 kernel/sched/completion.c:116 __flush_work+0x5bd/0xc60 kernel/workqueue.c:4208 __purge_vmap_area_lazy+0x84d/0xc10 mm/vmalloc.c:2299 drain_vmap_area_work+0x27/0x40 mm/vmalloc.c:2324 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 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: 1 lock held by khungtaskd/30: #0: ffffffff8ddb5220 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #0: ffffffff8ddb5220 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8ddb5220 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6620 2 locks held by kworker/1:1/46: 3 locks held by kworker/0:2/942: #0: ffff888015880948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206 #1: ffffc90003d5fd80 (drain_vmap_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207 #2: ffffffff8df31168 (vmap_purge_lock){+.+.}-{3:3}, at: drain_vmap_area_work+0x17/0x40 mm/vmalloc.c:2323 2 locks held by dhcpcd/4883: #0: ffffffff8f9f3ac8 (vlan_ioctl_mutex){+.+.}-{3:3}, at: sock_ioctl+0x4a8/0x6c0 net/socket.c:1303 #1: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: vlan_ioctl_handler+0xcf/0xa80 net/8021q/vlan.c:553 2 locks held by getty/4979: #0: ffff88802b3cb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211 4 locks held by kworker/u9:0/13604: #0: ffff88805aba9148 ((wq_completion)hci14#4){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206 #1: ffffc90003477d80 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207 #2: ffff88805b26c078 (&hdev->lock){+.+.}-{3:3}, at: hci_remote_features_evt+0x99/0x9e0 net/bluetooth/hci_event.c:3686 #3: ffffffff8fc82468 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1962 [inline] #3: ffffffff8fc82468 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_remote_features_evt+0x4dc/0x9e0 net/bluetooth/hci_event.c:3720 4 locks held by kworker/u8:6/18661: #0: ffff8880166e3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206 #1: ffffc90003557d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207 #2: ffffffff8fa08590 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xbf0 net/core/net_namespace.c:594 #3: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: wg_netns_pre_exit+0x1b/0x230 drivers/net/wireguard/device.c:414 5 locks held by kworker/u8:8/18662: 3 locks held by kworker/u8:12/18665: 3 locks held by kworker/0:1/21034: #0: ffff888015880948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206 #1: ffffc90003317d80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207 #2: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:276 3 locks held by kworker/u9:2/23125: 2 locks held by kworker/0:3/23457: 4 locks held by kworker/u9:3/23490: #0: ffff888062282948 ((wq_completion)hci13#5){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206 #1: ffffc90003797d80 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207 #2: ffff8880246f8078 (&hdev->lock){+.+.}-{3:3}, at: hci_remote_features_evt+0x99/0x9e0 net/bluetooth/hci_event.c:3686 #3: ffffffff8fc82468 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1962 [inline] #3: ffffffff8fc82468 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_remote_features_evt+0x4dc/0x9e0 net/bluetooth/hci_event.c:3720 2 locks held by syz-executor/23664: #0: ffffffff8fa08590 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:504 #1: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: tc_action_net_exit include/net/act_api.h:173 [inline] #1: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: gate_exit_net+0x24/0x130 net/sched/act_gate.c:659 2 locks held by syz-executor/23671: #0: ffffffff8fa08590 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:504 #1: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: mpls_net_exit+0x83/0x350 net/mpls/af_mpls.c:2708 2 locks held by syz-executor/23674: #0: ffffffff8fa08590 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:504 #1: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: cangw_pernet_exit_batch+0x15/0xa0 net/can/gw.c:1257 2 locks held by syz-executor/23677: #0: ffffffff8fa08590 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:504 #1: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: cangw_pernet_exit_batch+0x15/0xa0 net/can/gw.c:1257 2 locks held by syz-executor/23710: #0: ffffffff8fa08590 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:504 #1: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0x8c/0xae0 net/core/dev.c:11874 3 locks held by syz-executor/23800: #0: ffff88804d290d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:488 #1: ffff88804d290078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x346/0x1110 net/bluetooth/hci_sync.c:5110 #2: ffffffff8fc82468 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline] #2: ffffffff8fc82468 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xc4/0x260 net/bluetooth/hci_conn.c:2592 3 locks held by syz-executor/23803: #0: ffff88807de0cd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:488 #1: ffff88807de0c078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x346/0x1110 net/bluetooth/hci_sync.c:5110 #2: ffffffff8fc82468 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline] #2: ffffffff8fc82468 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xc4/0x260 net/bluetooth/hci_conn.c:2592 4 locks held by syz-executor/23805: #0: ffff88805e9f8d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:488 #1: ffff88805e9f8078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x346/0x1110 net/bluetooth/hci_sync.c:5110 #2: ffffffff8fc82468 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline] #2: ffffffff8fc82468 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xc4/0x260 net/bluetooth/hci_conn.c:2592 #3: ffffffff8ddc09b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:328 3 locks held by syz-executor/23808: #0: ffff888023d5cd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:488 #1: ffff888023d5c078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x346/0x1110 net/bluetooth/hci_sync.c:5110 #2: ffffffff8fc82468 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline] #2: ffffffff8fc82468 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xc4/0x260 net/bluetooth/hci_conn.c:2592 1 lock held by syz-executor/23825: #0: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6644 1 lock held by syz-executor/23829: #0: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6644 1 lock held by syz-executor/23831: #0: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6644 1 lock held by syz-executor/23838: #0: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6644 1 lock held by syz-executor/23839: #0: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fa1dce8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6644 2 locks held by syz-executor/23846: 1 lock held by syz-executor/23847: #0: ffff8880240d0d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_open+0x22/0x90 net/bluetooth/hci_core.c:417 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-syzkaller-12881-g6342649c33d2 #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+0x116/0x1f0 lib/dump_stack.c:119 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 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+0xf4e/0x1280 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 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: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 23846 Comm: syz-executor Not tainted 6.10.0-syzkaller-12881-g6342649c33d2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:__lock_acquire+0xe3a/0x3cb0 kernel/locking/lockdep.c:5112 Code: 7c 10 84 c9 74 0c 48 c7 c7 b4 c4 12 90 e8 6e 84 7f 00 44 8b 1d 5b 92 aa 0e 45 85 db 0f 84 9f 05 00 00 90 31 c0 e9 d5 f7 ff ff <48> 63 5c 24 20 be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 c0 RSP: 0018:ffffc90000a18ae8 EFLAGS: 00000046 RAX: 0000000000000003 RBX: ffff88807d93a952 RCX: 1ffffffff28c4d81 RDX: 0000000000000000 RSI: 0000000000000100 RDI: ffffffff94626c08 RBP: 0000000000000040 R08: 0000000000000000 R09: fffffbfff28c4cd8 R10: ffffffff946266c7 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff88807d93a930 R14: 0000000000000002 R15: ffff88807d939e00 FS: 0000555571b98500(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2434eb34c9 CR3: 000000002967a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5759 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 debug_object_deactivate+0x13c/0x370 lib/debugobjects.c:764 debug_hrtimer_deactivate kernel/time/hrtimer.c:428 [inline] debug_deactivate kernel/time/hrtimer.c:484 [inline] __run_hrtimer kernel/time/hrtimer.c:1657 [inline] __hrtimer_run_queues+0x47d/0xcc0 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:early_section include/linux/mmzone.h:1931 [inline] RIP: 0010:pfn_valid include/linux/mmzone.h:2033 [inline] RIP: 0010:vmap_pages_pte_range mm/vmalloc.c:507 [inline] RIP: 0010:vmap_pages_pmd_range mm/vmalloc.c:529 [inline] RIP: 0010:vmap_pages_pud_range mm/vmalloc.c:547 [inline] RIP: 0010:vmap_pages_p4d_range mm/vmalloc.c:565 [inline] RIP: 0010:vmap_small_pages_range_noflush+0x5d0/0xd30 mm/vmalloc.c:587 Code: 30 00 0f 85 c2 06 00 00 4c 8b 2b 31 ff 4d 89 ef 41 83 e7 02 4c 89 fe e8 8e 00 b2 ff 4d 85 ff 0f 84 e1 02 00 00 e8 50 05 b2 ff <41> 83 e5 08 31 ff 41 bf 01 00 00 00 4c 89 ee e8 6c 00 b2 ff 4d 85 RSP: 0018:ffffc90002f0fb58 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff88813fff90e0 RCX: ffffffff81d88a52 RDX: ffff88807d939e00 RSI: ffffffff81d88a60 RDI: 0000000000000007 RBP: ffff8880411c2200 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000000 R12: 8000000000000063 R13: ffffea000000000f R14: dffffc0000000000 R15: 0000000000000002 __vmap_pages_range_noflush+0x1b1/0x1d0 mm/vmalloc.c:616 vmap_pages_range_noflush mm/vmalloc.c:641 [inline] vmap_pages_range mm/vmalloc.c:661 [inline] __vmalloc_area_node mm/vmalloc.c:3703 [inline] __vmalloc_node_range_noprof+0x939/0x1520 mm/vmalloc.c:3841 vmalloc_user_noprof+0x6b/0x90 mm/vmalloc.c:3995 kcov_ioctl+0x4f/0x730 kernel/kcov.c:706 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fba8dd76e9b Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00 RSP: 002b:00007ffcfe73e5a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000040000 RCX: 00007fba8dd76e9b RDX: 0000000000040000 RSI: ffffffff80086301 RDI: 00000000000000e0 RBP: 00007fba8df066d8 R08: 00000000000000da R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000009