WARNING: CPU: 1 PID: 31 at lib/kobject_uevent.c:671 add_uevent_var+0x282/0x296 lib/kobject_uevent.c:671 Modules linked in: CPU: 1 PID: 31 Comm: kworker/1:1 Not tainted 6.8.0-rc1-syzkaller-00008-g3951f6add519 #0 Hardware name: riscv-virtio,qemu (DT) Workqueue: usb_hub_wq hub_event epc : add_uevent_var+0x282/0x296 lib/kobject_uevent.c:671 ra : add_uevent_var+0x282/0x296 lib/kobject_uevent.c:671 epc : ffffffff85832d34 ra : ffffffff85832d34 sp : ff20000000109b20 gp : ffffffff8863e380 tp : ff6000000ce94e00 t0 : bd5f592ea9ea0c87 t1 : ffebffff0f9a10e2 t2 : ff6000000ce958f8 s0 : ff20000000109c00 s1 : ff60000012a60000 a0 : 0000000000000001 a1 : 0000000000000000 a2 : 0000000000000002 a3 : ffffffff800b6c76 a4 : 0000000000000000 a5 : 0000000000000000 a6 : 0000000000000003 a7 : ff6000007cd08713 s2 : 0000000000000004 s3 : 1fe4000000021368 s4 : 1fec00000254c043 s5 : ff60000012a60218 s6 : 0000000000000006 s7 : 00000000000007fc s8 : ff60000012a60a1c s9 : 1fec00000254c143 s10: ffffffff88537800 s11: ffffffff86b9c700 t3 : 0000000000000004 t4 : ffebffff0f9a10e2 t5 : ffebffff0f9a10e3 t6 : ff200000001096d8 status: 0000000200000120 badaddr: 0000000000000000 cause: 0000000000000003 [] add_uevent_var+0x282/0x296 lib/kobject_uevent.c:671 [] kobject_uevent_env+0xb0c/0x1378 lib/kobject_uevent.c:602 [] kobject_uevent+0x22/0x2e lib/kobject_uevent.c:642 [] device_add+0x10d2/0x186e drivers/base/core.c:3606 [] input_register_device+0x606/0xe9a drivers/input/input.c:2379 [] hidinput_connect+0x4c72/0x88a4 drivers/hid/hid-input.c:2355 [] hid_connect+0x11e0/0x15e0 drivers/hid/hid-core.c:2194 [] hid_hw_start drivers/hid/hid-core.c:2309 [inline] [] hid_hw_start+0xb6/0x13c drivers/hid/hid-core.c:2300 [] ms_probe+0x15e/0x4f0 drivers/hid/hid-microsoft.c:391 [] __hid_device_probe drivers/hid/hid-core.c:2633 [inline] [] hid_device_probe+0x2a4/0x3f2 drivers/hid/hid-core.c:2670 [] call_driver_probe drivers/base/dd.c:579 [inline] [] really_probe+0x234/0xbbc drivers/base/dd.c:658 [] __driver_probe_device+0x1d4/0x458 drivers/base/dd.c:800 [] driver_probe_device+0x60/0x1ce drivers/base/dd.c:830 [] __device_attach_driver+0x1e4/0x2fe drivers/base/dd.c:958 [] bus_for_each_drv+0x142/0x1da drivers/base/bus.c:457 [] __device_attach+0x1c4/0x462 drivers/base/dd.c:1030 [] device_initial_probe+0x1c/0x26 drivers/base/dd.c:1079 [] bus_probe_device+0x15c/0x192 drivers/base/bus.c:532 [] device_add+0x112c/0x186e drivers/base/core.c:3625 [] hid_add_device+0x374/0x9b2 drivers/hid/hid-core.c:2816 [] usbhid_probe+0xa50/0xf84 drivers/hid/usbhid/hid-core.c:1429 [] usb_probe_interface+0x2d4/0x8a2 drivers/usb/core/driver.c:399 [] call_driver_probe drivers/base/dd.c:579 [inline] [] really_probe+0x234/0xbbc drivers/base/dd.c:658 [] __driver_probe_device+0x1d4/0x458 drivers/base/dd.c:800 [] driver_probe_device+0x60/0x1ce drivers/base/dd.c:830 [] __device_attach_driver+0x1e4/0x2fe drivers/base/dd.c:958 [] bus_for_each_drv+0x142/0x1da drivers/base/bus.c:457 [] __device_attach+0x1c4/0x462 drivers/base/dd.c:1030 [] device_initial_probe+0x1c/0x26 drivers/base/dd.c:1079 [] bus_probe_device+0x15c/0x192 drivers/base/bus.c:532 [] device_add+0x112c/0x186e drivers/base/core.c:3625 [] usb_set_configuration+0xfe0/0x1b10 drivers/usb/core/message.c:2207 [] usb_generic_driver_probe+0xae/0x128 drivers/usb/core/generic.c:254 [] usb_probe_device+0xd6/0x340 drivers/usb/core/driver.c:294 [] call_driver_probe drivers/base/dd.c:579 [inline] [] really_probe+0x234/0xbbc drivers/base/dd.c:658 [] __driver_probe_device+0x1d4/0x458 drivers/base/dd.c:800 [] driver_probe_device+0x60/0x1ce drivers/base/dd.c:830 [] __device_attach_driver+0x1e4/0x2fe drivers/base/dd.c:958 [] bus_for_each_drv+0x142/0x1da drivers/base/bus.c:457 [] __device_attach+0x1c4/0x462 drivers/base/dd.c:1030 [] device_initial_probe+0x1c/0x26 drivers/base/dd.c:1079 [] bus_probe_device+0x15c/0x192 drivers/base/bus.c:532 [] device_add+0x112c/0x186e drivers/base/core.c:3625 [] usb_new_device+0x960/0x1648 drivers/usb/core/hub.c:2596 [] hub_port_connect drivers/usb/core/hub.c:5465 [inline] [] hub_port_connect_change drivers/usb/core/hub.c:5605 [inline] [] port_event drivers/usb/core/hub.c:5765 [inline] [] hub_event+0x2954/0x4756 drivers/usb/core/hub.c:5847 [] process_one_work+0x7ce/0x179c kernel/workqueue.c:2633 [] process_scheduled_works kernel/workqueue.c:2706 [inline] [] worker_thread+0xadc/0x10f8 kernel/workqueue.c:2787 [] kthread+0x28c/0x3a6 kernel/kthread.c:388 [] ret_from_fork+0xe/0x1c arch/riscv/kernel/entry.S:229