------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=2 set at [] do_wait_for_common kernel/sched/completion.c:98 [inline] do not call blocking ops when !TASK_RUNNING; state=2 set at [] __wait_for_common+0x297/0x4c0 kernel/sched/completion.c:121 WARNING: kernel/sched/core.c:8807 at __might_sleep+0x94/0xc0 kernel/sched/core.c:8807, CPU#0: kworker/0:2/1140 Modules linked in: CPU: 0 UID: 0 PID: 1140 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:__might_sleep+0x97/0xc0 kernel/sched/core.c:8807 Code: 8b 94 24 90 16 00 00 48 85 d2 75 14 48 83 c4 08 89 ee 48 89 df 31 d2 5b 5d 41 5c e9 33 fc ff ff 48 8d 3d fc 0e 6e 09 48 89 d1 <67> 48 0f b9 3a eb db e8 8d a5 92 00 eb 9f 89 74 24 04 e8 b2 a5 92 RSP: 0018:ffffc90000007950 EFLAGS: 00010086 RAX: dffffc0000000000 RBX: ffffffff8811ef40 RCX: ffffffff87699847 RDX: ffffffff87699847 RSI: 0000000000000002 RDI: ffffffff8af0f3b0 RBP: 00000000000002c1 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 698030c068004806 R12: ffff88810b36d700 R13: ffff88811fa3f418 R14: ffff888124e75000 R15: ffff88811fa3f4f4 FS: 0000000000000000(0000) GS:ffff8882686d3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbbeb37ed58 CR3: 0000000135e2e000 CR4: 00000000003506f0 Call Trace: usb_kill_urb+0x8e/0x320 drivers/usb/core/urb.c:705 usb_tx_block+0x91/0x320 drivers/net/wireless/marvell/libertas/if_usb.c:429 if_usb_send_fw_pkt.isra.0+0x2e4/0x550 drivers/net/wireless/marvell/libertas/if_usb.c:366 if_usb_receive_fwload+0x5d3/0x780 drivers/net/wireless/marvell/libertas/if_usb.c:592 __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:1785 [inline] __hrtimer_run_queues+0x50e/0xa70 kernel/time/hrtimer.c:1849 hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1866 handle_softirqs+0x1de/0x9d0 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [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 97 23 fa 48 89 df e8 2e e7 23 fa f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 c5 6e 17 fa 65 8b 05 8e af 89 05 85 c0 74 16 5b RSP: 0018:ffffc900036ff130 EFLAGS: 00000246 RAX: 0000000000000006 RBX: ffff8881f5625fc0 RCX: 0000000000000040 RDX: 0000000000000000 RSI: ffffffff8901db96 RDI: ffffffff87afa420 RBP: 0000000000000287 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8881f5625fc0 R13: 0000000000000000 R14: 00000000ffffffff R15: ffff8881f5626008 __mod_timer+0x409/0xca0 kernel/time/timer.c:1139 add_timer+0x62/0x90 kernel/time/timer.c:1249 schedule_timeout+0x122/0x280 kernel/time/sleep_timeout.c:98 do_wait_for_common kernel/sched/completion.c:100 [inline] __wait_for_common+0x2e7/0x4c0 kernel/sched/completion.c:121 usb_start_wait_urb+0x147/0x4c0 drivers/usb/core/message.c:64 usb_internal_control_msg drivers/usb/core/message.c:103 [inline] usb_control_msg+0x326/0x4a0 drivers/usb/core/message.c:154 usb_get_descriptor+0xbb/0x1b0 drivers/usb/core/message.c:794 usb_get_configuration+0x28f/0x42a0 drivers/usb/core/config.c:952 usb_enumerate_device drivers/usb/core/hub.c:2527 [inline] usb_new_device+0x580/0x7d0 drivers/usb/core/hub.c:2665 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+0x9d7/0x1920 kernel/workqueue.c:3275 process_scheduled_works kernel/workqueue.c:3358 [inline] worker_thread+0x5da/0xe40 kernel/workqueue.c:3439 kthread+0x370/0x450 kernel/kthread.c:467 ret_from_fork+0x6c3/0xcb0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: 8b 94 24 90 16 00 00 mov 0x1690(%rsp),%edx 7: 48 85 d2 test %rdx,%rdx a: 75 14 jne 0x20 c: 48 83 c4 08 add $0x8,%rsp 10: 89 ee mov %ebp,%esi 12: 48 89 df mov %rbx,%rdi 15: 31 d2 xor %edx,%edx 17: 5b pop %rbx 18: 5d pop %rbp 19: 41 5c pop %r12 1b: e9 33 fc ff ff jmp 0xfffffc53 20: 48 8d 3d fc 0e 6e 09 lea 0x96e0efc(%rip),%rdi # 0x96e0f23 27: 48 89 d1 mov %rdx,%rcx * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: eb db jmp 0xc 31: e8 8d a5 92 00 call 0x92a5c3 36: eb 9f jmp 0xffffffd7 38: 89 74 24 04 mov %esi,0x4(%rsp) 3c: e8 .byte 0xe8 3d: b2 a5 mov $0xa5,%dl 3f: 92 xchg %eax,%edx