INFO: task kworker/1:0:24 blocked for more than 143 seconds. Not tainted 6.15.0-rc3-syzkaller-00001-g9d7a0577c9db #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:21528 pid:24 tgid:24 ppid:2 task_flags:0x4208060 flags:0x00004000 Workqueue: events reg_todo Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1b33/0x51f0 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 reg_todo+0x1c/0x8d0 net/wireless/reg.c:3219 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/1:8:5928 blocked for more than 143 seconds. Not tainted 6.15.0-rc3-syzkaller-00001-g9d7a0577c9db #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:8 state:D stack:24872 pid:5928 tgid:5928 ppid:2 task_flags:0x4208060 flags:0x00004000 Workqueue: events_power_efficient reg_check_chans_work Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1b33/0x51f0 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_leave_invalid_chans net/wireless/reg.c:2471 [inline] reg_check_chans_work+0x166/0xfc0 net/wireless/reg.c:2486 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: #0: ffffffff8ebe5388 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2678 5 locks held by kworker/0:0/9: 2 locks held by kworker/0:1/10: 3 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/13: 3 locks held by kworker/1:0/24: #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: ffffc900001e7c60 (reg_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc900001e7c60 (reg_work){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319 #2: ffffffff900eb308 (rtnl_mutex){+.+.}-{4:4}, at: reg_todo+0x1c/0x8d0 net/wireless/reg.c:3219 1 lock held by khungtaskd/31: #0: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #0: ffffffff8ed3df20 (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: 3 locks held by kworker/u8:3/53: 3 locks held by kworker/u8:4/68: 3 locks held by kworker/u8:5/1031: 3 locks held by kworker/0:2/1213: 3 locks held by kworker/u8:6/1329: 2 locks held by kworker/R-bat_e/3402: 3 locks held by kworker/u8:7/4219: 2 locks held by syslogd/5182: 2 locks held by udevd/5200: 2 locks held by dhcpcd/5493: 1 lock held by dhcpcd/5494: 2 locks held by getty/5582: #0: ffff8880367920a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900036be2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 drivers/tty/n_tty.c:2222 1 lock held by syz-executor/5814: 3 locks held by syz-executor/5825: 5 locks held by syz-executor/5828: 7 locks held by kworker/u9:2/5830: 1 lock held by syz-executor/5839: 2 locks held by syz-executor/5843: 1 lock held by kworker/R-wg-cr/5858: 1 lock held by kworker/R-wg-cr/5859: #0: ffffffff8ebe5388 (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/5860: #0: ffffffff8ebe5388 (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/5863: #0: ffffffff8ebe5388 (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/5864: #0: ffffffff8ebe5388 (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/5867: #0: ffffffff8ebe5388 (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/5874: #0: ffffffff8ebe5388 (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/5875: #0: ffffffff8ebe5388 (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/5876: #0: ffffffff8ebe5388 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffffffff8ebe5388 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa44/0x1020 kernel/workqueue.c:3529 2 locks held by kworker/0:3/5879: 5 locks held by kworker/0:4/5880: 3 locks held by kworker/1:5/5883: 2 locks held by kworker/1:6/5884: 2 locks held by kworker/0:6/5913: 4 locks held by kworker/1:8/5928: #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: ffffc90004c87c60 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc90004c87c60 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319 #2: ffffffff900eb308 (rtnl_mutex){+.+.}-{4:4}, at: reg_check_chans_work+0x9b/0xfc0 net/wireless/reg.c:2483 #3: ffff888053e00768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6092 [inline] #3: ffff888053e00768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2471 [inline] #3: ffff888053e00768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x166/0xfc0 net/wireless/reg.c:2486 3 locks held by kworker/u8:8/6004: 3 locks held by kworker/1:9/6007: 4 locks held by syz.2.27/6010: 3 locks held by kworker/u8:9/6009: 4 locks held by kworker/u8:10/6015: 4 locks held by kworker/u8:11/6016: #0: ffff88814dd28148 ((wq_completion)wg-kex-wg0#3){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline] #0: ffff88814dd28148 ((wq_completion)wg-kex-wg0#3){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319 #1: ffffc90003617c60 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc90003617c60 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319 #2: ffff888060d1d308 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_create_initiation+0x112/0xcb0 drivers/net/wireguard/noise.c:529 #3: ffff888056346648 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_create_initiation+0x121/0xcb0 drivers/net/wireguard/noise.c:530 7 locks held by kworker/u8:12/6018: 3 locks held by kworker/u8:13/6019: #0: ffff88814bae9148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline] #0: ffff88814bae9148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319 #1: ffffc90003b2fc60 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc90003b2fc60 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319 #2: ffffffff900eb308 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #2: ffffffff900eb308 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4735 2 locks held by dhcpcd/6021: 4 locks held by kworker/0:8/6023: ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc3-syzkaller-00001-g9d7a0577c9db #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: 9 Comm: kworker/0:0 Not tainted 6.15.0-rc3-syzkaller-00001-g9d7a0577c9db #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: wg-kex-wg1 wg_packet_handshake_receive_worker RIP: 0010:unwind_get_return_address+0x8/0x90 arch/x86/kernel/unwind_orc.c:365 Code: 40 8b 74 24 14 e9 da fe ff ff e8 93 16 ba 0a 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 <53> 48 89 fb 49 be 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 42 RSP: 0018:ffffc90000006588 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffffc900000065a0 RCX: 0000000000000004 RDX: dffffc0000000000 RSI: ffffffff8e4c80af RDI: ffffc900000065a0 RBP: ffffc90000006630 R08: ffffc90000006e88 R09: 0000000000000000 R10: ffffc900000065f0 R11: fffff52000000cc0 R12: ffff88801c2f8000 R13: ffffffff81ae6180 R14: ffffc90000006680 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888124fcf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fccd8380ef8 CR3: 00000000644fa000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0xff/0x150 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122 save_stack+0xfc/0x1f0 mm/page_owner.c:156 __set_page_owner+0x93/0x530 mm/page_owner.c:329 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1718 prep_new_page mm/page_alloc.c:1726 [inline] get_page_from_freelist+0x360d/0x37b0 mm/page_alloc.c:3688 __alloc_frozen_pages_noprof+0x211/0x5b0 mm/page_alloc.c:4970 alloc_pages_mpol+0x339/0x690 mm/mempolicy.c:2301 alloc_slab_page mm/slub.c:2468 [inline] allocate_slab+0x8f/0x3b0 mm/slub.c:2632 new_slab mm/slub.c:2686 [inline] ___slab_alloc+0xc3b/0x1500 mm/slub.c:3872 __slab_alloc+0x58/0xa0 mm/slub.c:3962 __slab_alloc_node mm/slub.c:4037 [inline] slab_alloc_node mm/slub.c:4198 [inline] kmem_cache_alloc_noprof+0x270/0x390 mm/slub.c:4217 skb_clone+0x20c/0x390 net/core/skbuff.c:2056 deliver_clone net/bridge/br_forward.c:125 [inline] br_flood+0x3df/0x680 net/bridge/br_forward.c:249 br_handle_frame_finish+0x185b/0x1f60 net/bridge/br_input.c:220 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:5773 __netif_receive_skb_one_core net/core/dev.c:5885 [inline] __netif_receive_skb+0x130/0x670 net/core/dev.c:6000 process_backlog+0x664/0x15c0 net/core/dev.c:6352 __napi_poll+0xcb/0x480 net/core/dev.c:7324 napi_poll net/core/dev.c:7388 [inline] net_rx_action+0x89d/0x1240 net/core/dev.c:7510 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_final+0x114/0x260 lib/crypto/blake2s.c:54 hmac+0x674/0x9d0 drivers/net/wireguard/noise.c:333 kdf+0x129/0x3a0 drivers/net/wireguard/noise.c:367 mix_precomputed_dh drivers/net/wireguard/noise.c:426 [inline] wg_noise_handshake_consume_initiation+0x50b/0xd60 drivers/net/wireguard/noise.c:623 wg_receive_handshake_packet drivers/net/wireguard/receive.c:144 [inline] wg_packet_handshake_receive_worker+0x5bd/0xf60 drivers/net/wireguard/receive.c:213 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