watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [kworker/1:3:5225] Modules linked in: irq event stamp: 13357884 hardirqs last enabled at (13357883): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (13357883): [] _raw_spin_unlock_irqrestore+0x52/0x80 kernel/locking/spinlock.c:194 hardirqs last disabled at (13357884): [] sysvec_apic_timer_interrupt+0xe/0xb0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (13357876): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last enabled at (13357876): [] __alloc_skb+0x35d/0x410 net/core/skbuff.c:672 softirqs last disabled at (13357874): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (13357874): [] __alloc_skb+0x35d/0x410 net/core/skbuff.c:672 CPU: 1 UID: 0 PID: 5225 Comm: kworker/1:3 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 46 1c 02 fa 48 89 df e8 fe 6e 02 fa f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 45 c2 f5 f9 65 8b 05 5e 26 49 05 85 c0 74 16 5b RSP: 0018:ffffc9000239edf0 EFLAGS: 00000246 RAX: 0000000000000002 RBX: ffff888102af2000 RCX: 0000000000000006 RDX: 0000000000000000 RSI: ffffffff88d03c4d RDI: ffffffff878a7300 RBP: 0000000000000246 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8aa491d7 R11: ffff8881139c27e8 R12: 0000000000000246 R13: ffff888102af28c8 R14: ffff888102af27f8 R15: ffff88810f33cd08 FS: 0000000000000000(0000) GS:ffff888268cf4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000001000 CR3: 00000000090a6000 CR4: 00000000003506f0 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] ath6kl_usb_alloc_urb_from_pipe+0x1e8/0x2a0 drivers/net/wireless/ath/ath6kl/usb.c:148 ath6kl_usb_post_recv_transfers.constprop.0+0x230/0x400 drivers/net/wireless/ath/ath6kl/usb.c:424 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+0x17e/0x11b0 drivers/net/wireless/ath/ath6kl/core.c:97 ath6kl_usb_probe+0xcee/0x1440 drivers/net/wireless/ath/ath6kl/usb.c:1168 usb_probe_interface+0x303/0xa80 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:581 [inline] really_probe+0x241/0xb20 drivers/base/dd.c:659 __driver_probe_device+0x1de/0x470 drivers/base/dd.c:801 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831 __device_attach_driver+0x1df/0x350 drivers/base/dd.c:959 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4e0 drivers/base/dd.c:1031 device_initial_probe+0xaa/0xc0 drivers/base/dd.c:1086 bus_probe_device+0x64/0x150 drivers/base/bus.c:574 device_add+0x116e/0x1980 drivers/base/core.c:3689 usb_set_configuration+0x1187/0x1e50 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0xb1/0x110 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+0x241/0xb20 drivers/base/dd.c:659 __driver_probe_device+0x1de/0x470 drivers/base/dd.c:801 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831 __device_attach_driver+0x1df/0x350 drivers/base/dd.c:959 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4e0 drivers/base/dd.c:1031 device_initial_probe+0xaa/0xc0 drivers/base/dd.c:1086 bus_probe_device+0x64/0x150 drivers/base/bus.c:574 device_add+0x116e/0x1980 drivers/base/core.c:3689 usb_new_device+0xd07/0x1a90 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+0x31bf/0x5420 drivers/usb/core/hub.c:5953 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x74f/0xa30 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: 5233 Comm: kworker/0:3 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: events legacy_dvb_usb_read_remote_control RIP: 0010:select_idle_sibling kernel/sched/fair.c:7883 [inline] RIP: 0010:select_task_rq_fair+0x3d4e/0x3f30 kernel/sched/fair.c:8581 Code: 1b 89 e8 45 27 50 01 e9 60 d4 ff ff 48 c7 c7 c0 0c 1b 89 48 89 74 24 30 e8 2f 27 50 01 48 8b 74 24 30 e9 ac d1 ff ff 4c 89 fa ff ff 37 00 48 c1 e0 2a 48 c1 ea 03 0f b6 14 02 4c 89 f8 83 e0 RSP: 0018:ffffc90000007c20 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffff8881000a87a0 RCX: 0000000000000001 RDX: ffffffff8aa495b0 RSI: ffffffff88ce314f RDI: ffff8881000a87ac RBP: ffff8881f56242d8 R08: 0000000000000000 R09: ffffed10201d9aab R10: ffff888100ecd55f R11: ffff88811374c528 R12: 0000000000000001 R13: 0000000000000000 R14: ffff888100ecd400 R15: ffffffff8aa495b0 FS: 0000000000000000(0000) GS:ffff888268bf4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30c24220 CR3: 000000013984c000 CR4: 00000000003506f0 Call Trace: select_task_rq kernel/sched/core.c:3497 [inline] try_to_wake_up+0x53f/0x1480 kernel/sched/core.c:4206 hrtimer_wakeup+0x47/0x60 kernel/time/hrtimer.c:2013 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x202/0xc40 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline] __sysvec_apic_timer_interrupt+0x10b/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+0x8b/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+0x556/0x6b0 kernel/printk/printk.c:2425 Code: 00 4d 85 ed 0f 85 19 01 00 00 e8 c5 1d 21 00 9c 5d 81 e5 00 02 00 00 31 ff 48 89 ee e8 83 18 21 00 48 85 ed 0f 85 25 01 00 00 a5 1d 21 00 45 31 c9 41 b8 01 00 00 00 31 c9 48 8d 05 00 00 00 RSP: 0018:ffffc9000245f978 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000017 RCX: ffffffff815ed01b RDX: ffff88811374ba80 RSI: ffffffff815ed025 RDI: 0000000000000007 RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: ffff88811374c528 R12: 1ffff9200048bf31 R13: 0000000000000200 R14: ffff8881139c1d40 R15: ffffc9000245fa40 _printk+0xc7/0x100 kernel/printk/printk.c:2451 m920x_read drivers/media/usb/dvb-usb/m920x.c:40 [inline] m920x_rc_query+0x496/0x770 drivers/media/usb/dvb-usb/m920x.c:193 legacy_dvb_usb_read_remote_control+0x10c/0x4f0 drivers/media/usb/dvb-usb/dvb-usb-remote.c:123 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x74f/0xa30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246