watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [kworker/1:5:5249] Modules linked in: irq event stamp: 10844344 hardirqs last enabled at (10844343): [] ___slab_alloc+0x892/0x1ca0 mm/slub.c:4536 hardirqs last disabled at (10844344): [] sysvec_apic_timer_interrupt+0xe/0xb0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (10844340): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last enabled at (10844340): [] __alloc_skb+0x35d/0x410 net/core/skbuff.c:672 softirqs last disabled at (10844338): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (10844338): [] __alloc_skb+0x35d/0x410 net/core/skbuff.c:672 CPU: 1 UID: 0 PID: 5249 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:unwind_next_frame+0x11d6/0x1ea0 arch/x86/kernel/unwind_orc.c:532 Code: e8 6f eb ff ff e9 96 f1 ff ff 80 3d 33 e8 48 09 00 0f 85 85 f1 ff ff e9 e0 79 b1 ff 48 b8 00 00 00 00 00 fc ff df 48 8b 14 24 <48> c1 ea 03 80 3c 02 00 0f 85 02 09 00 00 48 89 c8 4d 8b 7d 38 48 RSP: 0018:ffffc900023fe390 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffffff8b865412 RDX: ffffc900023fe438 RSI: 0000000000000001 RDI: ffffffff8b11d284 RBP: ffffc900023fe448 R08: ffffffff8b865416 R09: 0000000000000001 R10: 0000000000000200 R11: 00000000000533b0 R12: ffffc900023fe450 R13: ffffc900023fe400 R14: 0000000000000005 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888268adb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4d3e0a8400 CR3: 00000001179fa000 CR4: 00000000003506f0 Call Trace: arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 save_stack+0x162/0x1e0 mm/page_owner.c:165 __set_page_owner+0x8c/0x540 mm/page_owner.c:341 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1e1/0x250 mm/page_alloc.c:1846 prep_new_page mm/page_alloc.c:1854 [inline] get_page_from_freelist+0xd57/0x3b20 mm/page_alloc.c:3915 __alloc_frozen_pages_noprof+0x269/0x2230 mm/page_alloc.c:5210 alloc_pages_mpol+0xe8/0x410 mm/mempolicy.c:2486 alloc_slab_page mm/slub.c:3075 [inline] allocate_slab mm/slub.c:3248 [inline] new_slab+0x2c4/0x440 mm/slub.c:3302 ___slab_alloc+0xda3/0x1ca0 mm/slub.c:4656 __slab_alloc.isra.0+0x63/0x110 mm/slub.c:4779 __slab_alloc_node mm/slub.c:4855 [inline] slab_alloc_node mm/slub.c:5251 [inline] __do_kmalloc_node mm/slub.c:5656 [inline] __kmalloc_node_track_caller_noprof+0x5d4/0x9a0 mm/slub.c:5764 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:608 __alloc_skb+0x186/0x410 net/core/skbuff.c:690 __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: gspca_pac7302 2-1:0.0: URB error -71, resubmitting NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 5225 Comm: kworker/0:4 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:vsnprintf+0x22b/0x1240 lib/vsprintf.c:2908 Code: 04 0f 84 1c 06 00 00 0f 87 3e 01 00 00 41 80 fc 02 0f 84 18 09 00 00 41 80 fc 03 0f 84 ff 07 00 00 45 84 e4 0f 84 57 05 00 00 20 4d 60 fa 48 8b 54 24 38 48 b8 00 00 00 00 00 fc ff df 48 c1 RSP: 0018:ffffc900000072a0 EFLAGS: 00000002 RAX: 0000000000000002 RBX: ffffffff87699c24 RCX: ffffffff8750ddae RDX: 0000000000000001 RSI: 0000000000000007 RDI: ffff8881120057c0 RBP: ffffc90000007390 R08: 0000000000000001 R09: 0000000000000007 R10: 0000000000000001 R11: 0000000000e2d6a0 R12: 0000000000000001 R13: 0000000000000025 R14: ffffffff87699c22 R15: ffffc900000074b1 FS: 0000000000000000(0000) GS:ffff8882689db000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff29f4a53ec CR3: 000000013aa04000 CR4: 00000000003506f0 Call Trace: snprintf+0xc7/0x100 lib/vsprintf.c:3041 print_caller kernel/printk/printk.c:1366 [inline] info_print_prefix+0x134/0x350 kernel/printk/printk.c:1385 record_print_text+0x143/0x3c0 kernel/printk/printk.c:1432 printk_get_next_message+0x2d1/0x6c0 kernel/printk/printk.c:3018 console_emit_next_record kernel/printk/printk.c:3083 [inline] console_flush_one_record+0x67c/0xe50 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+0x103/0x260 kernel/printk/printk.c:3359 vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2426 _printk+0xcf/0x110 kernel/printk/printk.c:2451 int_irq.cold+0x1a/0x7f drivers/media/usb/gspca/gspca.c:104 __usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741 dummy_timer+0xd85/0x3670 drivers/usb/gadget/udc/dummy_hcd.c:1995 __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:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xed/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0x8f/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_flush_one_record+0xac3/0xe50 kernel/printk/printk.c:3216 Code: 00 e8 31 5e 28 00 9c 5d 81 e5 00 02 00 00 31 ff 48 89 ee e8 af 75 20 00 48 85 ed 0f 85 d7 01 00 00 e8 c1 7a 20 00 fb 4c 89 e8 <48> c1 e8 03 42 80 3c 38 00 0f 85 64 03 00 00 48 8b 0c 24 48 8b 6b RSP: 0018:ffffc900022cf7c8 EFLAGS: 00000293 RAX: ffffffff89a1b758 RBX: ffffffff89a1b700 RCX: ffffffff8190b031 RDX: ffff8881120057c0 RSI: ffffffff8190b03f RDI: ffff8881120057c0 RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000039ffe R13: ffffffff89a1b758 R14: ffffc900022cf848 R15: dffffc0000000000 console_flush_all kernel/printk/printk.c:3289 [inline] __console_flush_and_unlock kernel/printk/printk.c:3319 [inline] console_unlock+0x103/0x260 kernel/printk/printk.c:3359 vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2426 _printk+0xcf/0x110 kernel/printk/printk.c:2451 legacy_dvb_usb_read_remote_control.cold+0x11/0x16 drivers/media/usb/dvb-usb/dvb-usb-remote.c:124 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