usb 1-1: config 0 descriptor?? hid-u2fzero 0003:20A0:4287.0001: hidraw0: USB HID v0.8b Joystick [HID 20a0:4287] on usb-dummy_hcd.0-1/input0 hid-u2fzero 0003:20A0:4287.0001: NitroKey U2F LED initialised Unable to handle kernel paging request at virtual address dfff800000000015 KASAN: null-ptr-deref in range [0x00000000000000a8-0x00000000000000af] Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 [dfff800000000015] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4459 Comm: kworker/1:13 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 Workqueue: usb_hub_wq hub_event pstate: 02400005 (nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : u2fzero_recv drivers/hid/hid-u2fzero.c:137 [inline] pc : u2fzero_rng_read+0x210/0x614 drivers/hid/hid-u2fzero.c:223 lr : u2fzero_recv drivers/hid/hid-u2fzero.c:135 [inline] lr : u2fzero_rng_read+0x1ec/0x614 drivers/hid/hid-u2fzero.c:223 sp : ffff800021686700 x29: ffff800021686870 x28: 1fffe0001aa3f610 x27: dfff800000000000 x26: ffff7000042d0ce8 x25: 00000000000000a8 x24: ffff800021686760 x23: ffff0000d51fb080 x22: ffff0000d51fb088 x21: 1fffe0001aa3f687 x20: ffff0000d51fb320 x19: 1fffe0001aa3f611 x18: 1fffe00033e7217e x17: 313030302e373832 x16: ffff800011ba0e90 x15: 000000000004ffff x14: ffff60001abfc098 x13: 1fffe0001abfc090 x12: 0000000000000001 x11: ffffffffffffffff x10: dfff800000000000 x9 : 0000000000000001 x8 : 0000000000000015 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff8000186b52c8 x4 : 000000000000000a x3 : 0000000000000030 x2 : 0000000000000001 x1 : 0000000000000000 x0 : ffff0000d5fe0486 Call trace: u2fzero_recv drivers/hid/hid-u2fzero.c:137 [inline] u2fzero_rng_read+0x210/0x614 drivers/hid/hid-u2fzero.c:223 rng_get_data drivers/char/hw_random/core.c:201 [inline] add_early_randomness+0x88/0x170 drivers/char/hw_random/core.c:73 hwrng_register+0x37c/0x430 drivers/char/hw_random/core.c:593 devm_hwrng_register+0x50/0xcc drivers/char/hw_random/core.c:665 u2fzero_init_hwrng+0x10c/0x14c drivers/hid/hid-u2fzero.c:266 u2fzero_probe+0x300/0x3f0 drivers/hid/hid-u2fzero.c:359 hid_device_probe+0x230/0x320 drivers/hid/hid-core.c:2678 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x3a0/0xac4 drivers/base/dd.c:638 __driver_probe_device+0x1c8/0x368 drivers/base/dd.c:804 driver_probe_device+0x78/0x324 drivers/base/dd.c:834 __device_attach_driver+0x28c/0x4c0 drivers/base/dd.c:962 bus_for_each_drv+0x154/0x1e4 drivers/base/bus.c:429 __device_attach+0x2a4/0x3d8 drivers/base/dd.c:1034 device_initial_probe+0x24/0x34 drivers/base/dd.c:1083 bus_probe_device+0xbc/0x1c4 drivers/base/bus.c:489 device_add+0x93c/0xe4c drivers/base/core.c:3712 hid_add_device+0x310/0x4d0 drivers/hid/hid-core.c:2830 usbhid_probe+0x8e0/0xc78 drivers/hid/usbhid/hid-core.c:1442 usb_probe_interface+0x50c/0x988 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x3a0/0xac4 drivers/base/dd.c:638 __driver_probe_device+0x1c8/0x368 drivers/base/dd.c:804 driver_probe_device+0x78/0x324 drivers/base/dd.c:834 __device_attach_driver+0x28c/0x4c0 drivers/base/dd.c:962 bus_for_each_drv+0x154/0x1e4 drivers/base/bus.c:429 __device_attach+0x2a4/0x3d8 drivers/base/dd.c:1034 device_initial_probe+0x24/0x34 drivers/base/dd.c:1083 bus_probe_device+0xbc/0x1c4 drivers/base/bus.c:489 device_add+0x93c/0xe4c drivers/base/core.c:3712 usb_set_configuration+0x15ec/0x1b88 drivers/usb/core/message.c:2223 usb_generic_driver_probe+0x8c/0x148 drivers/usb/core/generic.c:238 usb_probe_device+0x120/0x258 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x3a0/0xac4 drivers/base/dd.c:638 __driver_probe_device+0x1c8/0x368 drivers/base/dd.c:804 driver_probe_device+0x78/0x324 drivers/base/dd.c:834 __device_attach_driver+0x28c/0x4c0 drivers/base/dd.c:962 bus_for_each_drv+0x154/0x1e4 drivers/base/bus.c:429 __device_attach+0x2a4/0x3d8 drivers/base/dd.c:1034 device_initial_probe+0x24/0x34 drivers/base/dd.c:1083 bus_probe_device+0xbc/0x1c4 drivers/base/bus.c:489 device_add+0x93c/0xe4c drivers/base/core.c:3712 usb_new_device+0x7e4/0x11d0 drivers/usb/core/hub.c:2664 hub_port_connect drivers/usb/core/hub.c:5522 [inline] hub_port_connect_change drivers/usb/core/hub.c:5662 [inline] port_event drivers/usb/core/hub.c:5822 [inline] hub_event+0x2254/0x3e74 drivers/usb/core/hub.c:5904 process_one_work+0x7e4/0x13bc kernel/workqueue.c:2292 worker_thread+0x8cc/0xfe8 kernel/workqueue.c:2439 kthread+0x254/0x2e0 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850 Code: 9650352d f94002c8 9102a119 d343ff28 (387b6908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 9650352d bl 0xfffffffff940d4b4 4: f94002c8 ldr x8, [x22] 8: 9102a119 add x25, x8, #0xa8 c: d343ff28 lsr x8, x25, #3 * 10: 387b6908 ldrb w8, [x8, x27] <-- trapping instruction