smsc95xx 5-1:1.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x00000030: -32 smsc95xx 5-1:1.0 (unnamed net_device) (uninitialized): Error reading E2P_CMD ===================================================== BUG: KMSAN: uninit-value in smsc95xx_reset+0x353/0x3eb0 drivers/net/usb/smsc95xx.c:1039 CPU: 0 PID: 3740 Comm: kworker/0:2 Not tainted 5.8.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x21c/0x280 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 smsc95xx_reset+0x353/0x3eb0 drivers/net/usb/smsc95xx.c:1039 smsc95xx_bind+0x8b3/0x1720 drivers/net/usb/smsc95xx.c:1289 usbnet_probe+0x1152/0x3f90 drivers/net/usb/usbnet.c:1737 usb_probe_interface+0xece/0x1550 drivers/usb/core/driver.c:374 really_probe+0xf20/0x20b0 drivers/base/dd.c:529 driver_probe_device+0x293/0x390 drivers/base/dd.c:701 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:807 bus_for_each_drv+0x2ca/0x3f0 drivers/base/bus.c:431 __device_attach+0x4e2/0x7f0 drivers/base/dd.c:873 device_initial_probe+0x4a/0x60 drivers/base/dd.c:920 bus_probe_device+0x177/0x3d0 drivers/base/bus.c:491 device_add+0x3b0e/0x40d0 drivers/base/core.c:2680 usb_set_configuration+0x380f/0x3f10 drivers/usb/core/message.c:2032 usb_generic_driver_probe+0x138/0x300 drivers/usb/core/generic.c:241 usb_probe_device+0x311/0x490 drivers/usb/core/driver.c:272 really_probe+0xf20/0x20b0 drivers/base/dd.c:529 driver_probe_device+0x293/0x390 drivers/base/dd.c:701 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:807 bus_for_each_drv+0x2ca/0x3f0 drivers/base/bus.c:431 __device_attach+0x4e2/0x7f0 drivers/base/dd.c:873 device_initial_probe+0x4a/0x60 drivers/base/dd.c:920 bus_probe_device+0x177/0x3d0 drivers/base/bus.c:491 device_add+0x3b0e/0x40d0 drivers/base/core.c:2680 usb_new_device+0x1bd4/0x2a30 drivers/usb/core/hub.c:2554 hub_port_connect drivers/usb/core/hub.c:5208 [inline] hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] port_event drivers/usb/core/hub.c:5494 [inline] hub_event+0x5e7b/0x8a70 drivers/usb/core/hub.c:5576 process_one_work+0x1688/0x2140 kernel/workqueue.c:2269 worker_thread+0x10bc/0x2730 kernel/workqueue.c:2415 kthread+0x551/0x590 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Local variable ----buf.i.i265@smsc95xx_reset created at: __smsc95xx_read_reg drivers/net/usb/smsc95xx.c:1034 [inline] smsc95xx_read_reg drivers/net/usb/smsc95xx.c:144 [inline] smsc95xx_reset+0x1ba/0x3eb0 drivers/net/usb/smsc95xx.c:1035 __smsc95xx_read_reg drivers/net/usb/smsc95xx.c:1034 [inline] smsc95xx_read_reg drivers/net/usb/smsc95xx.c:144 [inline] smsc95xx_reset+0x1ba/0x3eb0 drivers/net/usb/smsc95xx.c:1035 =====================================================