dvb-usb: found a 'Genpix 8PSK-to-USB2 Rev.2 DVB-S receiver' in warm state. gp8psk: usb in 128 operation failed. ===================================================== BUG: KMSAN: uninit-value in gp8psk_power_ctrl+0x4dc/0x1740 drivers/media/usb/dvb-usb/gp8psk.c:190 CPU: 0 PID: 9615 Comm: kworker/0:5 Not tainted 5.10.0-rc4-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:118 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197 gp8psk_power_ctrl+0x4dc/0x1740 drivers/media/usb/dvb-usb/gp8psk.c:190 dvb_usb_device_power_ctrl drivers/media/usb/dvb-usb/dvb-usb-init.c:236 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:170 [inline] dvb_usb_device_init+0x16ea/0x3350 drivers/media/usb/dvb-usb/dvb-usb-init.c:287 gp8psk_usb_probe+0xa2/0x1a0 drivers/media/usb/dvb-usb/gp8psk.c:304 usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396 really_probe+0xebd/0x2420 drivers/base/dd.c:558 driver_probe_device+0x293/0x390 drivers/base/dd.c:738 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:844 bus_for_each_drv+0x2ca/0x3f0 drivers/base/bus.c:431 __device_attach+0x538/0x860 drivers/base/dd.c:912 device_initial_probe+0x4a/0x60 drivers/base/dd.c:959 bus_probe_device+0x177/0x3d0 drivers/base/bus.c:491 device_add+0x399e/0x3f20 drivers/base/core.c:2936 usb_set_configuration+0x39cf/0x4010 drivers/usb/core/message.c:2159 usb_generic_driver_probe+0x138/0x300 drivers/usb/core/generic.c:238 usb_probe_device+0x317/0x570 drivers/usb/core/driver.c:293 really_probe+0xebd/0x2420 drivers/base/dd.c:558 driver_probe_device+0x293/0x390 drivers/base/dd.c:738 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:844 bus_for_each_drv+0x2ca/0x3f0 drivers/base/bus.c:431 __device_attach+0x538/0x860 drivers/base/dd.c:912 device_initial_probe+0x4a/0x60 drivers/base/dd.c:959 bus_probe_device+0x177/0x3d0 drivers/base/bus.c:491 device_add+0x399e/0x3f20 drivers/base/core.c:2936 usb_new_device+0x1bd6/0x2a30 drivers/usb/core/hub.c:2554 hub_port_connect drivers/usb/core/hub.c:5222 [inline] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline] port_event drivers/usb/core/hub.c:5508 [inline] hub_event+0x5bc9/0x8890 drivers/usb/core/hub.c:5590 process_one_work+0x121c/0x1fc0 kernel/workqueue.c:2272 worker_thread+0x10cc/0x2740 kernel/workqueue.c:2418 kthread+0x51c/0x560 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Local variable ----status@gp8psk_power_ctrl created at: gp8psk_power_ctrl+0x62/0x1740 drivers/media/usb/dvb-usb/gp8psk.c:185 gp8psk_power_ctrl+0x62/0x1740 drivers/media/usb/dvb-usb/gp8psk.c:185 =====================================================