imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10488 ticks this GP) idle=f414/1/0x4000000000000000 softirq=7169/7169 fqs=5214 rcu: hardirqs softirqs csw/system rcu: number: 1 0 0 rcu: cputime: 0 52374 0 ==> 52490(ms) rcu: (t=10500 jiffies g=7133 q=8163 ncpus=2) CPU: 1 PID: 2475 Comm: kworker/1:3 Not tainted 6.4.0-rc4-syzkaller-00150-g922c0cb578ac #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 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+0x3c/0x70 kernel/locking/spinlock.c:194 Code: 74 24 10 e8 36 40 fe fa 48 89 ef e8 5e ae fe fa 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 2f 6d f3 fa 65 8b 05 40 e9 d4 79 85 c0 74 0a 5b 5d c3 e8 ec fc RSP: 0018:ffffc90000188b20 EFLAGS: 00000206 RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff16a0116 RDX: 0000000000000000 RSI: 0000000000000101 RDI: 0000000000000001 RBP: ffff888105bb0000 R08: 0000000000000001 R09: ffffffff8b4c98d7 R10: 0000000000000001 R11: 0000000000056001 R12: ffff88810630f440 R13: ffff888101f6a800 R14: dffffc0000000000 R15: ffff888112bf3300 FS: 0000000000000000(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f50c9dd5368 CR3: 0000000007a99000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:405 [inline] dummy_timer+0x1519/0x3400 drivers/usb/gadget/udc/dummy_hcd.c:2001 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers+0x29b/0x4b0 kernel/time/timer.c:1751 __run_timers kernel/time/timer.c:2022 [inline] __run_timers kernel/time/timer.c:1995 [inline] run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035 __do_softirq+0x1c1/0x8e8 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu kernel/softirq.c:650 [inline] irq_exit_rcu+0x11b/0x190 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x92/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:__might_sleep+0x34/0x160 kernel/sched/core.c:10070 Code: 00 fc ff df 41 54 41 89 f4 55 48 89 fd 53 65 48 8b 1c 25 c0 a9 03 00 48 8d 7b 18 48 83 ec 10 48 89 fa 48 c1 ea 03 0f b6 04 02 <84> c0 74 08 3c 03 0f 8e d0 00 00 00 8b 73 18 85 f6 74 3e 65 48 8b RSP: 0018:ffffc900015074e0 EFLAGS: 00000a06 RAX: 0000000000000000 RBX: ffff88810df39d00 RCX: ffffc90001507498 RDX: 1ffff11021be73a3 RSI: 0000000000000132 RDI: ffff88810df39d18 RBP: ffffffff8772ddc1 R08: 0000000000000001 R09: ffffffff8907f5d7 R10: fffffbfff120feba R11: 0000000000056001 R12: 0000000000000132 R13: 0000000000000dc0 R14: 0000000000000dc0 R15: ffffffff81bcfcf4 might_alloc include/linux/sched/mm.h:306 [inline] slab_pre_alloc_hook mm/slab.h:670 [inline] slab_alloc_node mm/slub.c:3433 [inline] slab_alloc mm/slub.c:3459 [inline] __kmem_cache_alloc_lru mm/slub.c:3466 [inline] kmem_cache_alloc+0x309/0x370 mm/slub.c:3475 kmem_cache_zalloc include/linux/slab.h:670 [inline] __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:611 kernfs_new_node+0x97/0x120 fs/kernfs/dir.c:673 __kernfs_create_file+0x55/0x350 fs/kernfs/file.c:1047 sysfs_add_file_mode_ns+0x213/0x3f0 fs/sysfs/file.c:294 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x322/0xb80 fs/sysfs/group.c:148 internal_create_groups.part.0+0x90/0x140 fs/sysfs/group.c:188 internal_create_groups fs/sysfs/group.c:184 [inline] sysfs_create_groups+0x29/0x50 fs/sysfs/group.c:214 device_add_groups drivers/base/core.c:2726 [inline] device_add_attrs drivers/base/core.c:2846 [inline] device_add+0x6de/0x1a40 drivers/base/core.c:3579 usb_create_ep_devs+0x160/0x2a0 drivers/usb/core/endpoint.c:169 usb_new_device+0xf13/0x19d0 drivers/usb/core/hub.c:2603 hub_port_connect drivers/usb/core/hub.c:5407 [inline] hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] port_event drivers/usb/core/hub.c:5711 [inline] hub_event+0x2e3d/0x4ed0 drivers/usb/core/hub.c:5793 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 process_scheduled_works kernel/workqueue.c:2468 [inline] worker_thread+0x881/0x10c0 kernel/workqueue.c:2554 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 2-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 2-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 2-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 2-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored