rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5337/1:b..l rcu: (detected by 0, t=10502 jiffies, g=78569, q=1280 ncpus=2) task:kworker/1:6 state:R running task stack:20656 pid:5337 tgid:5337 ppid:2 task_flags:0x4208060 flags:0x00080000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5510 [inline] __schedule+0x1325/0x47d0 kernel/sched/core.c:7234 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7556 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x1da/0x7b0 kernel/entry/common.c:167 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:__read_once_word_nocheck+0x3/0x10 include/asm-generic/rwonce.h:68 Code: ff ff 48 c7 c7 58 b2 86 87 e8 f9 ec ac 00 e9 1e fa ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 07 18 e3 0f 06 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 RSP: 0000:ffffc900034eeac8 EFLAGS: 00000202 RAX: ffffffff83d0108e RBX: 0000000000000001 RCX: ffffffff8b88ca96 RDX: ffffc900034ef601 RSI: ffffc900034ef608 RDI: ffffc900034ef608 RBP: ffffc900034eeb88 R08: ffffffff8b88ca9a R09: 0000000000000007 R10: 0000000000000200 R11: 000000000002d006 R12: ffffc900034eeb90 R13: ffffc900034eeb40 R14: ffffc900034ef610 R15: ffffc900034eeb74 deref_stack_reg arch/x86/kernel/unwind_orc.c:422 [inline] unwind_next_frame+0xd07/0x2090 arch/x86/kernel/unwind_orc.c:614 arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6e/0x70 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4584 [inline] slab_alloc_node mm/slub.c:4917 [inline] kmem_cache_alloc_node_noprof+0x27a/0x660 mm/slub.c:4989 kmalloc_reserve+0x148/0x350 net/core/skbuff.c:615 __alloc_skb+0x185/0x710 net/core/skbuff.c:715 alloc_skb include/linux/skbuff.h:1384 [inline] alloc_uevent_skb+0x7d/0x210 lib/kobject_uevent.c:289 uevent_net_broadcast_untagged lib/kobject_uevent.c:326 [inline] kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline] kobject_uevent_env+0xd2d/0x18b0 lib/kobject_uevent.c:611 driver_bound+0x13e/0x220 drivers/base/dd.c:469 really_probe+0x3d4/0xa60 drivers/base/dd.c:756 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x64/0x160 drivers/base/bus.c:620 device_add+0x121d/0x1970 drivers/base/core.c:3772 usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x64/0x160 drivers/base/bus.c:620 device_add+0x121d/0x1970 drivers/base/core.c:3772 usb_new_device.part.0+0xcc2/0x1686 drivers/usb/core/hub.c:2708 usb_new_device drivers/usb/core/hub.c:5833 [inline] hub_port_connect drivers/usb/core/hub.c:5580 [inline] hub_port_connect_change drivers/usb/core/hub.c:5720 [inline] port_event drivers/usb/core/hub.c:5884 [inline] hub_event.cold+0x51a/0xe9d drivers/usb/core/hub.c:5966 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - nonzero urb status received: -71 usb 5-1: pegasus_irq - urb shutting down with status: -2