xr_serial ttyUSB0: Failed to set reg 0x1a: -71
xr_serial ttyUSB0: probe with driver xr_serial failed with error -71
usb 1-1: USB disconnect, device number 2
Unable to handle kernel paging request at virtual address dfff80000000000b
KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f]
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0
[dfff80000000000b] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 4827 Comm: kworker/0:4 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
Workqueue: usb_hub_wq hub_event
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : klist_put+0x50/0x11c lib/klist.c:212
lr : klist_put+0x2c/0x11c lib/klist.c:210
sp : ffff800093577300
x29: ffff800093577300 x28: ffff0000c9cba030 x27: 1fffe00019397404
x26: ffff0000c9cba025 x25: ffff0000ce249d40 x24: 1fffe0001b3d1790
x23: dfff800000000000 x22: ffff80008a173300 x21: 0000000000000001
x20: 0000000000000000 x19: ffff0000d9e8bc80 x18: 00000000ffffffff
x17: ffff80008a7d6000 x16: 0000000000000007 x15: ffff80008a35fda0
x14: ffff80008a5d5e28 x13: 0000000000000001 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000100000 x9 : 000000000000fb7f
x8 : 000000000000000b x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff80008a9886e0 x4 : 0000000000000008 x3 : ffff80008046a5e0
x2 : 0000000000000001 x1 : ffff0000ce249d40 x0 : 0000000000000001
Call trace:
 klist_put+0x50/0x11c lib/klist.c:212 (P)
 klist_del lib/klist.c:230 [inline]
 klist_remove+0x120/0x260 lib/klist.c:249
 __device_release_driver drivers/base/dd.c:1357 [inline]
 device_release_driver_internal+0x1c8/0x20c drivers/base/dd.c:1372
 device_release_driver+0x28/0x38 drivers/base/dd.c:1395
 usb_driver_release_interface+0x10c/0x178 drivers/usb/core/driver.c:640
 release_sibling drivers/usb/serial/usb-serial.c:156 [inline]
 usb_serial_disconnect+0x2f4/0x340 drivers/usb/serial/usb-serial.c:1200
 usb_unbind_interface+0x180/0x6d4 drivers/usb/core/driver.c:458
 device_remove+0x114/0x134 drivers/base/dd.c:618
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x124/0x20c drivers/base/dd.c:1372
 device_release_driver+0x28/0x38 drivers/base/dd.c:1395
 bus_remove_device+0x2d0/0x400 drivers/base/bus.c:664
 device_del+0x3ec/0x71c drivers/base/core.c:3961
 usb_disable_device+0x24c/0x670 drivers/usb/core/message.c:1478
 usb_disconnect+0x230/0x6f8 drivers/usb/core/hub.c:2345
 hub_port_connect drivers/usb/core/hub.c:5415 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5715 [inline]
 port_event drivers/usb/core/hub.c:5879 [inline]
 hub_event+0x299c/0x39fc drivers/usb/core/hub.c:5961
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838
Code: f9400268 927ff914 91016288 d343fd08 (38776908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	f9400268 	ldr	x8, [x19]
   4:	927ff914 	and	x20, x8, #0xfffffffffffffffe
   8:	91016288 	add	x8, x20, #0x58
   c:	d343fd08 	lsr	x8, x8, #3
* 10:	38776908 	ldrb	w8, [x8, x23] <-- trapping instruction