=====================================================
BUG: KMSAN: uninit-value in mii_nway_restart+0x119/0x1e0 drivers/net/mii.c:468
 mii_nway_restart+0x119/0x1e0 drivers/net/mii.c:468
 ch9200_bind+0x238/0xeb0 drivers/net/usb/ch9200.c:354
 usbnet_probe+0xda1/0x3f40 drivers/net/usb/usbnet.c:1772
 usb_probe_interface+0xd42/0x12f0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x4dc/0xd90 drivers/base/dd.c:658
 __driver_probe_device+0x2ab/0x5d0 drivers/base/dd.c:800
 driver_probe_device+0x72/0x890 drivers/base/dd.c:830
 __device_attach_driver+0x568/0x9e0 drivers/base/dd.c:958
 bus_for_each_drv+0x403/0x620 drivers/base/bus.c:462
 __device_attach+0x3c1/0x650 drivers/base/dd.c:1030
 device_initial_probe+0x32/0x40 drivers/base/dd.c:1079
 bus_probe_device+0x3dc/0x5c0 drivers/base/bus.c:537
 device_add+0x13aa/0x1ba0 drivers/base/core.c:3666
 usb_set_configuration+0x31ea/0x38f0 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x109/0x2a0 drivers/usb/core/generic.c:250
 usb_probe_device+0x3a7/0x690 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x4dc/0xd90 drivers/base/dd.c:658
 __driver_probe_device+0x2ab/0x5d0 drivers/base/dd.c:800
 driver_probe_device+0x72/0x890 drivers/base/dd.c:830
 __device_attach_driver+0x568/0x9e0 drivers/base/dd.c:958
 bus_for_each_drv+0x403/0x620 drivers/base/bus.c:462
 __device_attach+0x3c1/0x650 drivers/base/dd.c:1030
 device_initial_probe+0x32/0x40 drivers/base/dd.c:1079
 bus_probe_device+0x3dc/0x5c0 drivers/base/bus.c:537
 device_add+0x13aa/0x1ba0 drivers/base/core.c:3666
 usb_new_device+0x15f8/0x2480 drivers/usb/core/hub.c:2663
 hub_port_connect drivers/usb/core/hub.c:5531 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
 port_event drivers/usb/core/hub.c:5831 [inline]
 hub_event+0x4ffe/0x72d0 drivers/usb/core/hub.c:5913
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xc1d/0x1e80 kernel/workqueue.c:3319
 worker_thread+0xea3/0x1500 kernel/workqueue.c:3400
 kthread+0x6ce/0xf10 kernel/kthread.c:464
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Local variable buff created at:
 ch9200_mdio_read+0x3c/0x100 drivers/net/usb/ch9200.c:180
 mii_nway_restart+0x8a/0x1e0 drivers/net/mii.c:466

CPU: 0 UID: 0 PID: 6062 Comm: kworker/0:3 Not tainted 6.14.0-syzkaller-12966-ga2cc6ff5ec8f #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: usb_hub_wq hub_event
=====================================================