hid-u2fzero 0003:10C4:8ACF.0001: unknown main item tag 0x0
hid-u2fzero 0003:10C4:8ACF.0001: hidraw0: USB HID v0.00 Device [HID 10c4:8acf] on usb-dummy_hcd.0-1/input0
hid-u2fzero 0003:10C4:8ACF.0001: U2F Zero 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: 0 PID: 7 Comm: kworker/0:0 Not tainted 6.1.136-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: usb_hub_wq hub_event
pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : u2fzero_recv drivers/hid/hid-u2fzero.c:137 [inline]
pc : u2fzero_rng_read+0x1f0/0x59c drivers/hid/hid-u2fzero.c:223
lr : u2fzero_recv drivers/hid/hid-u2fzero.c:135 [inline]
lr : u2fzero_rng_read+0x1cc/0x59c drivers/hid/hid-u2fzero.c:223
sp : ffff80001c7f6520
x29: ffff80001c7f6690 x28: ffff7000038fecac x27: 00000000000000a8
x26: ffff0000d636a088 x25: ffff0000d636a438 x24: ffff80001c7f6580
x23: ffff0000d636a080 x22: 1fffe0001ac6d487 x21: 1fffe0001ac6d411
x20: ffff0000d636a320 x19: dfff800000000000 x18: ffff800011a7bd00
x17: ffff8000181a0000 x16: ffff8000082c9a64 x15: ffff800017c80fc0
x14: ffff0000c09a4218 x13: ffff0000c09a4330 x12: ffff600018ddf758
x11: 1fffe00018ddf750 x10: 0000000000000001 x9 : 0000000000000001
x8 : 0000000000000015 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff8000184a52b8 x4 : 000000000000000a x3 : 0000000000000030
x2 : 0000000000000001 x1 : 0000000000000000 x0 : ffff0000c6efba86
Call trace:
 u2fzero_recv drivers/hid/hid-u2fzero.c:137 [inline]
 u2fzero_rng_read+0x1f0/0x59c drivers/hid/hid-u2fzero.c:223
 rng_get_data drivers/char/hw_random/core.c:201 [inline]
 add_early_randomness+0x88/0x16c 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+0x108/0x144 drivers/hid/hid-u2fzero.c:266
 u2fzero_probe+0x300/0x3f0 drivers/hid/hid-u2fzero.c:359
 hid_device_probe+0x22c/0x328 drivers/hid/hid-core.c:2632
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x39c/0xae0 drivers/base/dd.c:639
 __driver_probe_device+0x180/0x314 drivers/base/dd.c:785
 driver_probe_device+0x78/0x330 drivers/base/dd.c:815
 __device_attach_driver+0x290/0x4e0 drivers/base/dd.c:943
 bus_for_each_drv+0x150/0x1d8 drivers/base/bus.c:429
 __device_attach+0x2a8/0x3d4 drivers/base/dd.c:1015
 device_initial_probe+0x24/0x34 drivers/base/dd.c:1064
 bus_probe_device+0xbc/0x1c4 drivers/base/bus.c:489
 device_add+0xb04/0xf94 drivers/base/core.c:3697
 hid_add_device+0x310/0x4c8 drivers/hid/hid-core.c:2784
 usbhid_probe+0x90c/0xc8c drivers/hid/usbhid/hid-core.c:1424
 usb_probe_interface+0x4fc/0x994 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x39c/0xae0 drivers/base/dd.c:639
 __driver_probe_device+0x180/0x314 drivers/base/dd.c:785
 driver_probe_device+0x78/0x330 drivers/base/dd.c:815
 __device_attach_driver+0x290/0x4e0 drivers/base/dd.c:943
 bus_for_each_drv+0x150/0x1d8 drivers/base/bus.c:429
 __device_attach+0x2a8/0x3d4 drivers/base/dd.c:1015
 device_initial_probe+0x24/0x34 drivers/base/dd.c:1064
 bus_probe_device+0xbc/0x1c4 drivers/base/bus.c:489
 device_add+0xb04/0xf94 drivers/base/core.c:3697
 usb_set_configuration+0x1598/0x1b0c drivers/usb/core/message.c:2165
 usb_generic_driver_probe+0x8c/0x144 drivers/usb/core/generic.c:238
 usb_probe_device+0x120/0x25c drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x39c/0xae0 drivers/base/dd.c:639
 __driver_probe_device+0x180/0x314 drivers/base/dd.c:785
 driver_probe_device+0x78/0x330 drivers/base/dd.c:815
 __device_attach_driver+0x290/0x4e0 drivers/base/dd.c:943
 bus_for_each_drv+0x150/0x1d8 drivers/base/bus.c:429
 __device_attach+0x2a8/0x3d4 drivers/base/dd.c:1015
 device_initial_probe+0x24/0x34 drivers/base/dd.c:1064
 bus_probe_device+0xbc/0x1c4 drivers/base/bus.c:489
 device_add+0xb04/0xf94 drivers/base/core.c:3697
 usb_new_device+0x7f0/0x11c4 drivers/usb/core/hub.c:2631
 hub_port_connect drivers/usb/core/hub.c:5489 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5629 [inline]
 port_event drivers/usb/core/hub.c:5785 [inline]
 hub_event+0x21c8/0x3dc4 drivers/usb/core/hub.c:5867
 process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292
 worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864
Code: 96587197 f9400348 9102a11b d343ff68 (38736908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	96587197 	bl	0xfffffffff961c65c
   4:	f9400348 	ldr	x8, [x26]
   8:	9102a11b 	add	x27, x8, #0xa8
   c:	d343ff68 	lsr	x8, x27, #3
* 10:	38736908 	ldrb	w8, [x8, x19] <-- trapping instruction