watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [kworker/1:7:5362] Modules linked in: irq event stamp: 16218294 hardirqs last enabled at (16218293): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (16218293): [] _raw_spin_unlock_irqrestore+0x52/0x80 kernel/locking/spinlock.c:194 hardirqs last disabled at (16218294): [] sysvec_apic_timer_interrupt+0xe/0xb0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (16218286): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (16218286): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (16218286): [] __irq_exit_rcu+0xfa/0x160 kernel/softirq.c:723 softirqs last disabled at (16218275): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (16218275): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (16218275): [] __irq_exit_rcu+0xfa/0x160 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 5362 Comm: kworker/1:7 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:lock_acquire+0x62/0x330 kernel/locking/lockdep.c:5872 Code: 03 47 0b 83 f8 07 0f 87 a2 02 00 00 89 c0 48 0f a3 05 22 d5 48 09 0f 82 74 02 00 00 8b 35 ba e1 48 09 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 39 03 47 0b 0f 85 ad 02 00 00 48 83 c4 RSP: 0018:ffffc90011f4e880 EFLAGS: 00000206 RAX: 0000000000000046 RBX: ffffffff892cd6e0 RCX: 0000000042ba59fd RDX: 0000000000000000 RSI: ffffffff88ce314f RDI: ffffffff878a7300 RBP: 0000000000000002 R08: 000000002eeebc5f R09: 00000000f2eeebc5 R10: 0000000000000002 R11: ffff88811d9e8aa8 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888268cf4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0565eff000 CR3: 000000011d96c000 CR4: 00000000003506f0 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] class_rcu_constructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:56 kasan_save_track+0x14/0x30 mm/kasan/common.c:77 poison_kmalloc_redzone mm/kasan/common.c:397 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:414 kmalloc_noprof include/linux/slab.h:957 [inline] dummy_urb_enqueue+0xa3/0x920 drivers/usb/gadget/udc/dummy_hcd.c:1273 usb_hcd_submit_urb+0x25b/0x1cf0 drivers/usb/core/hcd.c:1546 usb_submit_urb+0x899/0x1970 drivers/usb/core/urb.c:587 ath6kl_usb_post_recv_transfers.constprop.0+0x201/0x400 drivers/net/wireless/ath/ath6kl/usb.c:450 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: 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:skip_atoi lib/vsprintf.c:189 [inline] RIP: 0010:format_decode+0x719/0xd00 lib/vsprintf.c:2712 Code: 4c 89 e7 8d 1c 9b 49 83 c4 01 48 89 f8 48 89 fa 01 db 48 c1 e8 03 83 e2 07 42 0f b6 04 30 38 d0 7f 08 84 c0 0f 85 d0 04 00 00 <41> 0f b6 44 24 ff 4c 89 e2 83 e2 07 8d 5c 03 d0 4c 89 e0 48 c1 e8 RSP: 0018:ffffc900001f7378 EFLAGS: 00000202 RAX: 0000000000000006 RBX: 0000000000000000 RCX: ffffffff87538d3a RDX: 0000000000000002 RSI: ffffffff875390ff RDI: ffffffff876999c2 RBP: ffffc900001f7418 R08: 0000000000000005 R09: 0000000000000009 R10: 0000000000000006 R11: 0000000000127e80 R12: ffffffff876999c3 R13: ffffc900001f7498 R14: dffffc0000000000 R15: 0000000000000006 FS: 0000000000000000(0000) GS:ffff888268bf4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffb1e58dfe0 CR3: 00000001174d6000 CR4: 00000000003506f0 Call Trace: vsnprintf+0x156/0x11e0 lib/vsprintf.c:2889 sprintf+0xcc/0x100 lib/vsprintf.c:3110 print_caller kernel/printk/printk.c:1368 [inline] info_print_prefix+0x146/0x350 kernel/printk/printk.c:1385 record_print_text+0x140/0x400 kernel/printk/printk.c:1432 printk_get_next_message+0x2d1/0x6d0 kernel/printk/printk.c:3018 console_emit_next_record kernel/printk/printk.c:3083 [inline] console_flush_one_record+0x684/0xc60 kernel/printk/printk.c:3215 console_flush_all kernel/printk/printk.c:3289 [inline] __console_flush_and_unlock kernel/printk/printk.c:3319 [inline] console_unlock+0xef/0x240 kernel/printk/printk.c:3359 vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2426 _printk+0xc7/0x100 kernel/printk/printk.c:2451 kauditd_printk_skb kernel/audit.c:583 [inline] kauditd_hold_skb+0x205/0x250 kernel/audit.c:618 kauditd_send_queue+0x239/0x290 kernel/audit.c:803 kauditd_thread+0x693/0xad0 kernel/audit.c:927 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