INFO: task kworker/1:1:48 blocked for more than 145 seconds. Not tainted 6.14.0-next-20250328-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1 state:D stack:25320 pid:48 tgid:48 ppid:2 task_flags:0x4208060 flags:0x00004000 Workqueue: events reg_todo Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1b88/0x5240 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0x163/0x360 kernel/sched/core.c:6860 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917 __mutex_lock_common kernel/locking/mutex.c:678 [inline] __mutex_lock+0x805/0x10c0 kernel/locking/mutex.c:746 class_wiphy_constructor include/net/cfg80211.h:6092 [inline] reg_process_self_managed_hints+0xb9/0x1c0 net/wireless/reg.c:3209 reg_todo+0x7d8/0x8d0 net/wireless/reg.c:3222 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319 worker_thread+0x870/0xd50 kernel/workqueue.c:3400 kthread+0x7b7/0x940 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INFO: task kworker/1:6:5906 blocked for more than 145 seconds. Not tainted 6.14.0-next-20250328-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:6 state:D stack:24872 pid:5906 tgid:5906 ppid:2 task_flags:0x4208060 flags:0x00004000 Workqueue: events_power_efficient crda_timeout_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1b88/0x5240 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0x163/0x360 kernel/sched/core.c:6860 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917 __mutex_lock_common kernel/locking/mutex.c:678 [inline] __mutex_lock+0x805/0x10c0 kernel/locking/mutex.c:746 crda_timeout_work+0x15/0x50 net/wireless/reg.c:541 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319 worker_thread+0x870/0xd50 kernel/workqueue.c:3400 kthread+0x7b7/0x940 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Showing all locks held in the system: 1 lock held by kthreadd/2: 1 lock held by kworker/R-kvfre/6: 4 locks held by kworker/0:1/10: 3 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/13: 1 lock held by kworker/R-mm_pe/14: #0: ffffffff8ebe53e8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffffffff8ebe53e8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa44/0x1020 kernel/workqueue.c:3529 3 locks held by kworker/1:0/24: #0: ffff88801b081d48 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline] #0: ffff88801b081d48 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319 #1: ffffc900001e7c60 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc900001e7c60 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319 #2: ffffffff900fd948 (rtnl_mutex){+.+.}-{4:4}, at: reg_check_chans_work+0x9b/0xfc0 net/wireless/reg.c:2483 1 lock held by khungtaskd/31: #0: ffffffff8ed3df80 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8ed3df80 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #0: ffffffff8ed3df80 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6764 3 locks held by kworker/u8:2/36: 4 locks held by kworker/1:1/48: #0: ffff88801b080d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline] #0: ffff88801b080d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319 #1: ffffc90000b97c60 (reg_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc90000b97c60 (reg_work){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319 #2: ffffffff900fd948 (rtnl_mutex){+.+.}-{4:4}, at: reg_todo+0x1c/0x8d0 net/wireless/reg.c:3219 #3: ffff88807f760768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6092 [inline] #3: ffff88807f760768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_process_self_managed_hints+0xb9/0x1c0 net/wireless/reg.c:3209 3 locks held by kworker/u8:3/54: 7 locks held by kworker/u8:4/82: 2 locks held by kworker/0:2/975: 2 locks held by kworker/0:3/978: 3 locks held by kworker/u8:5/996: 3 locks held by kworker/u8:6/2923: 3 locks held by kworker/R-ipv6_/3173: #0: ffff88814d55b148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline] #0: ffff88814d55b148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319 #1: ffffc9000c48fbe0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc9000c48fbe0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319 #2: ffffffff900fd948 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #2: ffffffff900fd948 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4730 2 locks held by kworker/R-bat_e/3403: 3 locks held by kworker/u8:7/3476: 3 locks held by syslogd/5195: 2 locks held by udevd/5213: 3 locks held by dhcpcd/5506: 1 lock held by dhcpcd/5507: 2 locks held by getty/5605: #0: ffff8880357c20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900033532f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 drivers/tty/n_tty.c:2222 3 locks held by syz-executor/5841: 3 locks held by syz-executor/5842: 5 locks held by kworker/1:3/5851: 7 locks held by kworker/u9:4/5852: #0: ffff888143b74148 ((wq_completion)hci2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline] #0: ffff888143b74148 ((wq_completion)hci2){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319 #1: ffffc90004137c60 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc90004137c60 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319 #2: ffff88807ccd4d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:331 #3: ffff88807ccd4078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1f1/0xeb0 net/bluetooth/hci_sync.c:5597 #4: ffffffff90263628 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline] #4: ffffffff90263628 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x15d/0x300 net/bluetooth/hci_conn.c:1269 #5: ffff888026f9d338 (&conn->lock#2){+.+.}-{4:4}, at: l2cap_conn_del+0x71/0x690 net/bluetooth/l2cap_core.c:1761 #6: ffffffff8ed434b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline] #6: ffffffff8ed434b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x454/0x830 kernel/rcu/tree_exp.h:998 4 locks held by syz-executor/5860: 1 lock held by kworker/R-wg-cr/5877: #0: ffffffff8ebe53e8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678 1 lock held by kworker/R-wg-cr/5883: #0: ffffffff8ebe53e8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678 1 lock held by kworker/R-wg-cr/5884: #0: ffffffff8ebe53e8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678 1 lock held by kworker/R-wg-cr/5888: #0: ffffffff8ebe53e8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffffffff8ebe53e8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa44/0x1020 kernel/workqueue.c:3529 1 lock held by kworker/R-wg-cr/5891: 2 locks held by kworker/0:4/5893: 2 locks held by kworker/1:5/5894: 3 locks held by kworker/1:6/5906: #0: ffff88801b081d48 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline] #0: ffff88801b081d48 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319 #1: ffffc900043d7c60 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc900043d7c60 ((crda_timeout).work){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319 #2: ffffffff900fd948 (rtnl_mutex){+.+.}-{4:4}, at: crda_timeout_work+0x15/0x50 net/wireless/reg.c:541 3 locks held by kworker/1:8/5941: 2 locks held by syz.1.102/6173: 6 locks held by syz.2.111/6200: 3 locks held by kworker/u8:8/6201: 3 locks held by kworker/u8:9/6202: 3 locks held by kworker/u8:10/6203: 6 locks held by kworker/u8:11/6204: #0: ffff88801b089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline] #0: ffff88801b089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319 #1: ffffc9000beffc60 ((work_completion)(&buf->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc9000beffc60 ((work_completion)(&buf->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319 #2: ffff88801b0a10b8 (&buf->lock){+.+.}-{4:4}, at: flush_to_ldisc+0x38/0x860 drivers/tty/tty_buffer.c:467 #3: ffff8880627590a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref+0x1c/0x80 drivers/tty/tty_ldisc.c:263 #4: ffff8880627592e8 (&tty->termios_rwsem){++++}-{4:4}, at: n_tty_receive_buf_common+0x87/0x12e0 drivers/tty/n_tty.c:1686 #5: ffffc9000c2b7380 (&ldata->output_lock){+.+.}-{4:4}, at: commit_echoes drivers/tty/n_tty.c:740 [inline] #5: ffffc9000c2b7380 (&ldata->output_lock){+.+.}-{4:4}, at: n_tty_receive_char+0x5e5/0xb80 drivers/tty/n_tty.c:1421 8 locks held by kworker/u8:12/6205: 3 locks held by kworker/u8:13/6206: 2 locks held by kworker/u8:14/6208: 2 locks held by syz-executor/6209: ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-next-20250328-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x4ab/0x4e0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline] watchdog+0x1058/0x10a0 kernel/hung_task.c:437 kthread+0x7b7/0x940 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6205 Comm: kworker/u8:12 Not tainted 6.14.0-next-20250328-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: wg-kex-wg2 wg_packet_handshake_send_worker RIP: 0010:rt6_score_route+0x1/0x380 net/ipv6/route.c:717 Code: c1 0f 8c 23 ff ff ff 48 89 df e8 fa 38 66 f7 e9 16 ff ff ff 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 <41> 57 41 56 41 55 41 54 53 41 89 cd 89 d3 41 89 f7 49 89 fe 49 bc RSP: 0018:ffffc90000006350 EFLAGS: 00000246 RAX: ffffffff8ac961a6 RBX: ffff8880315edcb8 RCX: 0000000000000003 RDX: 000000000000000d RSI: 0000000000000001 RDI: ffff8880315edcb8 RBP: 0000000000000003 R08: ffffffff8ac9614b R09: ffffc90000006690 R10: ffffc900000064c0 R11: fffff52000000c9e R12: ffff8880605b4654 R13: ffff8880315edccf R14: 1ffff110062bdb99 R15: 1ffff110062bdb97 FS: 0000000000000000(0000) GS:ffff888124f95000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7daccb8ff8 CR3: 0000000033094000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: find_match+0x1cb/0xc10 net/ipv6/route.c:752 __find_rr_leaf+0x277/0x8f0 net/ipv6/route.c:835 find_rr_leaf net/ipv6/route.c:856 [inline] rt6_select net/ipv6/route.c:900 [inline] fib6_table_lookup+0x410/0xbf0 net/ipv6/route.c:2195 ip6_pol_route+0x26d/0x15f0 net/ipv6/route.c:2231 pol_lookup_func include/net/ip6_fib.h:616 [inline] fib6_rule_lookup+0x590/0x7a0 net/ipv6/fib6_rules.c:120 ip6_route_input_lookup net/ipv6/route.c:2300 [inline] ip6_route_input+0x85b/0xda0 net/ipv6/route.c:2596 ip6_rcv_finish+0x140/0x3d0 net/ipv6/ip6_input.c:77 ip_sabotage_in+0x203/0x290 net/bridge/br_netfilter_hooks.c:993 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc8/0x220 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] NF_HOOK+0x29b/0x450 include/linux/netfilter.h:312 __netif_receive_skb_one_core net/core/dev.c:5891 [inline] __netif_receive_skb+0x1ef/0x670 net/core/dev.c:6004 netif_receive_skb_internal net/core/dev.c:6090 [inline] netif_receive_skb+0x1ea/0x890 net/core/dev.c:6149 NF_HOOK+0xa0/0x410 include/linux/netfilter.h:314 br_handle_frame_finish+0x188d/0x1f60 net/bridge/br_input.c:226 br_nf_hook_thresh+0x482/0x5a0 net/bridge/br_netfilter_hooks.c:1170 br_nf_pre_routing_finish_ipv6+0xaa3/0xdd0 net/bridge/br_netfilter_ipv6.c:-1 NF_HOOK include/linux/netfilter.h:314 [inline] br_nf_pre_routing_ipv6+0x397/0x790 net/bridge/br_netfilter_ipv6.c:184 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_bridge_pre net/bridge/br_input.c:282 [inline] br_handle_frame+0x9fa/0x1530 net/bridge/br_input.c:433 __netif_receive_skb_core+0x155a/0x4bb0 net/core/dev.c:5777 __netif_receive_skb_one_core net/core/dev.c:5889 [inline] __netif_receive_skb+0x130/0x670 net/core/dev.c:6004 process_backlog+0x664/0x15c0 net/core/dev.c:6356 __napi_poll+0xcb/0x480 net/core/dev.c:7328 napi_poll net/core/dev.c:7392 [inline] net_rx_action+0x89d/0x1240 net/core/dev.c:7514 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:579 do_softirq+0x11f/0x1e0 kernel/softirq.c:480 __local_bh_enable_ip+0x1be/0x200 kernel/softirq.c:407 local_bh_enable include/linux/bottom_half.h:33 [inline] fpregs_unlock arch/x86/include/asm/fpu/api.h:77 [inline] kernel_fpu_end+0x103/0x150 arch/x86/kernel/fpu/core.c:460 blake2s_compress+0x5f/0xd0 arch/x86/crypto/blake2s-glue.c:49 blake2s_update+0x135/0x420 lib/crypto/blake2s.c:32 hmac+0x669/0x9d0 drivers/net/wireguard/noise.c:332 kdf+0x1a5/0x3a0 drivers/net/wireguard/noise.c:375 mix_precomputed_dh drivers/net/wireguard/noise.c:426 [inline] wg_noise_handshake_create_initiation+0x584/0xcb0 drivers/net/wireguard/noise.c:560 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:34 [inline] wg_packet_handshake_send_worker+0x16b/0x330 drivers/net/wireguard/send.c:51 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319 worker_thread+0x870/0xd50 kernel/workqueue.c:3400 kthread+0x7b7/0x940 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245