usb 5-1: Using ep0 maxpacket: 8
usb 5-1: New USB device found, idVendor=1de1, idProduct=c102, bcdDevice=4d.89
usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 5-1: config 0 descriptor??
=====================================================
BUG: KMSAN: uninit-value in irqentry_exit_to_kernel_mode_preempt+0xb0/0xc0 include/linux/irq-entry-common.h:464
 irqentry_exit_to_kernel_mode_preempt+0xb0/0xc0 include/linux/irq-entry-common.h:464
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x82/0xa40 kernel/entry/common.c:167
 sysvec_apic_timer_interrupt+0x52/0x90 arch/x86/kernel/apic/apic.c:1062
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:674
 __msan_metadata_ptr_for_store_1+0x34/0x40 mm/kmsan/instrumentation.c:91
 _dev_printk+0x11d/0x1c0 drivers/base/core.c:5031
 __drm_dev_vprintk+0x29b/0x2c0 drivers/gpu/drm/drm_print.c:194
 drm_dev_printk+0x208/0x220 drivers/gpu/drm/drm_print.c:326
 gm12u320_misc_request drivers/gpu/drm/tiny/gm12u320.c:-1 [inline]
 gm12u320_set_ecomode+0x88f/0x990 drivers/gpu/drm/tiny/gm12u320.c:453
 gm12u320_usb_probe+0x6f9/0xd10 drivers/gpu/drm/tiny/gm12u320.c:672
 usb_probe_interface+0xd87/0x1460 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x4c9/0xe40 drivers/base/dd.c:706
 __driver_probe_device+0x2d1/0x3d0 drivers/base/dd.c:868
 driver_probe_device+0x70/0x8f0 drivers/base/dd.c:898
 __device_attach_driver+0x54d/0x970 drivers/base/dd.c:1026
 bus_for_each_drv+0x3e3/0x680 drivers/base/bus.c:500
 __device_attach+0x2e7/0x620 drivers/base/dd.c:1098
 device_initial_probe+0x126/0x170 drivers/base/dd.c:1153
 bus_probe_device+0x286/0x530 drivers/base/bus.c:620
 device_add+0x1653/0x1cd0 drivers/base/core.c:3772
 usb_set_configuration+0x34c9/0x3bd0 drivers/usb/core/message.c:2268
 usb_generic_driver_probe+0xfc/0x290 drivers/usb/core/generic.c:250
 usb_probe_device+0x395/0x670 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x4c9/0xe40 drivers/base/dd.c:706
 __driver_probe_device+0x2d1/0x3d0 drivers/base/dd.c:868
 driver_probe_device+0x70/0x8f0 drivers/base/dd.c:898
 __device_attach_driver+0x54d/0x970 drivers/base/dd.c:1026
 bus_for_each_drv+0x3e3/0x680 drivers/base/bus.c:500
 __device_attach+0x2e7/0x620 drivers/base/dd.c:1098
 device_initial_probe+0x126/0x170 drivers/base/dd.c:1153
 bus_probe_device+0x286/0x530 drivers/base/bus.c:620
 device_add+0x1653/0x1cd0 drivers/base/core.c:3772
 usb_new_device+0x104a/0x2110 drivers/usb/core/hub.c:2695
 hub_port_connect drivers/usb/core/hub.c:5567 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x55f9/0x7580 drivers/usb/core/hub.c:5953
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xb57/0x1e00 kernel/workqueue.c:3405
 worker_thread+0xee0/0x1580 kernel/workqueue.c:3486
 kthread+0x54f/0x610 kernel/kthread.c:436
 ret_from_fork+0x20f/0x8e0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Local variable len.i created at:
 gm12u320_misc_request drivers/gpu/drm/tiny/gm12u320.c:204 [inline]
 gm12u320_set_ecomode+0x96/0x990 drivers/gpu/drm/tiny/gm12u320.c:453
 gm12u320_usb_probe+0x6f9/0xd10 drivers/gpu/drm/tiny/gm12u320.c:672

CPU: 0 UID: 0 PID: 5674 Comm: kworker/0:4 Tainted: G        W           syzkaller #0 PREEMPT(lazy) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: usb_hub_wq hub_event
=====================================================