watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [kworker/1:5:5233] Modules linked in: irq event stamp: 11586323 hardirqs last enabled at (11586322): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (11586322): [] _raw_spin_unlock_irqrestore+0x52/0x80 kernel/locking/spinlock.c:194 hardirqs last disabled at (11586323): [] sysvec_apic_timer_interrupt+0xe/0xb0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (11586316): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last enabled at (11586316): [] __alloc_skb+0x35d/0x410 net/core/skbuff.c:672 softirqs last disabled at (11586317): [] do_softirq kernel/softirq.c:523 [inline] softirqs last disabled at (11586317): [] do_softirq+0xac/0xe0 kernel/softirq.c:510 CPU: 1 UID: 0 PID: 5233 Comm: kworker/1:5 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: usb_hub_wq hub_event RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 06 11 38 fa 48 89 df e8 ee 5e 38 fa f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 e5 e9 2b fa 65 8b 05 5e 40 75 05 85 c0 74 16 5b RSP: 0018:ffffc900001a8c18 EFLAGS: 00000246 RAX: 0000000000000006 RBX: ffff888109fb8000 RCX: 0000000000000004 RDX: 0000000000000000 RSI: ffffffff88dec6f5 RDI: ffffffff878e97a0 RBP: 0000000000000246 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88811d030510 R13: ffff88810a3f2470 R14: 1ffff920000351b3 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888268a6a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3916ed40c0 CR3: 00000000092a8000 CR4: 00000000003506f0 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] dummy_timer+0x1d58/0x3670 drivers/usb/gadget/udc/dummy_hcd.c:2012 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x516/0x990 kernel/time/hrtimer.c:1841 hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1858 handle_softirqs+0x1dd/0x8f0 kernel/softirq.c:622 do_softirq kernel/softirq.c:523 [inline] do_softirq+0xac/0xe0 kernel/softirq.c:510 __local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:450 local_bh_enable include/linux/bottom_half.h:33 [inline] __alloc_skb+0x381/0x410 net/core/skbuff.c:674 __netdev_alloc_skb+0x7a/0x8f0 net/core/skbuff.c:754 netdev_alloc_skb include/linux/skbuff.h:3484 [inline] dev_alloc_skb include/linux/skbuff.h:3497 [inline] ath6kl_usb_post_recv_transfers.constprop.0+0x55/0x3d0 drivers/net/wireless/ath/ath6kl/usb.c:428 ath6kl_usb_start_recv_pipes drivers/net/wireless/ath/ath6kl/usb.c:498 [inline] hif_start drivers/net/wireless/ath/ath6kl/usb.c:703 [inline] ath6kl_usb_power_on+0x8e/0x160 drivers/net/wireless/ath/ath6kl/usb.c:1062 ath6kl_hif_power_on drivers/net/wireless/ath/ath6kl/hif-ops.h:136 [inline] ath6kl_core_init+0x173/0x11b0 drivers/net/wireless/ath/ath6kl/core.c:97 ath6kl_usb_probe+0xcd0/0x13e0 drivers/net/wireless/ath/ath6kl/usb.c:1168 usb_probe_interface+0x303/0x8f0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:581 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:659 __driver_probe_device+0x1de/0x400 drivers/base/dd.c:801 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831 __device_attach_driver+0x1df/0x340 drivers/base/dd.c:959 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1031 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1086 bus_probe_device+0x64/0x160 drivers/base/bus.c:574 device_add+0x11d9/0x1950 drivers/base/core.c:3689 usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:581 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:659 __driver_probe_device+0x1de/0x400 drivers/base/dd.c:801 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831 __device_attach_driver+0x1df/0x340 drivers/base/dd.c:959 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1031 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1086 bus_probe_device+0x64/0x160 drivers/base/bus.c:574 device_add+0x11d9/0x1950 drivers/base/core.c:3689 usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5953 process_one_work+0x9c2/0x1840 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x5da/0xe40 kernel/workqueue.c:3421 kthread+0x3b3/0x730 kernel/kthread.c:463 ret_from_fork+0x6c3/0xa20 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 29 Comm: kauditd Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:87 [inline] RIP: 0010:do_raw_spin_lock+0xb2/0x260 kernel/locking/spinlock_debug.c:115 Code: 3d ad 4e ad de 0f 85 53 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 6b 10 4c 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 8e 01 00 00 <48> 8b 43 10 65 48 3b 05 ba e4 3c 0b 0f 84 34 01 00 00 48 b8 00 00 RSP: 0018:ffffc90000007cb8 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffff8881157809c8 RCX: 0000000000000000 RDX: 1ffff11022af013b RSI: ffffffff88dcb9c1 RDI: ffff8881157809cc RBP: 0000000000000002 R08: 0000000037d70c81 R09: 00000000000000b7 R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff92000000f98 R13: ffff8881157809d8 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88826896a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c2d582d CR3: 00000000092a8000 CR4: 00000000003506f0 Call Trace: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0x42/0x60 kernel/locking/spinlock.c:162 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:557 [inline] try_to_wake_up+0xb4/0x1670 kernel/sched/core.c:4106 hrtimer_wakeup+0x47/0x60 kernel/time/hrtimer.c:2013 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x516/0x990 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x397/0x8c0 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline] __sysvec_apic_timer_interrupt+0x109/0x3c0 arch/x86/kernel/apic/apic.c:1062 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0x8a/0xb0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2037 [inline] RIP: 0010:vprintk_emit+0x553/0x6b0 kernel/printk/printk.c:2425 Code: 00 4d 85 ed 0f 85 1b 01 00 00 e8 78 54 20 00 9c 5d 81 e5 00 02 00 00 31 ff 48 89 ee e8 46 4f 20 00 48 85 ed 0f 85 27 01 00 00 58 54 20 00 45 31 c9 41 b8 01 00 00 00 31 c9 48 8d 05 00 00 00 RSP: 0018:ffffc900001f7b18 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 00000000000000e1 RCX: ffffffff8190e8ba RDX: ffff8881022aba80 RSI: ffffffff8190e8c4 RDI: ffff8881022aba80 RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff9200003ef65 R13: 0000000000000200 R14: ffff88810e708000 R15: ffffc900001f7be0 _printk+0xcf/0x110 kernel/printk/printk.c:2451 kauditd_printk_skb kernel/audit.c:583 [inline] kauditd_hold_skb.cold+0x3f/0x4e kernel/audit.c:618 kauditd_send_queue+0x232/0x2e0 kernel/audit.c:803 kauditd_thread+0x6b7/0xae0 kernel/audit.c:927 kthread+0x3b3/0x730 kernel/kthread.c:463 ret_from_fork+0x6c3/0xa20 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246