usb 1-1: New USB device found, idVendor=0547, idProduct=2235, bcdDevice= 0.00
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: syz
usb 1-1: Manufacturer: syz
usb 1-1: SerialNumber: syz
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 UID: 0 PID: 5625 Comm: kworker/1:4 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:usbtest_probe+0x522/0xcc0 drivers/usb/misc/usbtest.c:2822
Code: 46 fa 45 85 ff 78 0a e8 cc 2c 46 fa e9 92 00 00 00 48 8b 04 24 4c 8d 78 0a 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 bf 06 00 00 45 0f b6 3f 44 89 fe 83 e6 01
RSP: 0018:ffffc90004a2ee20 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff88801cee4000 RCX: dffffc0000000000
RDX: ffff88801dae5d00 RSI: 00000000ffffffff RDI: 00000000ffffffff
RBP: 1ffff11006360d5a R08: 00000000da688922 R09: 0000000069bae40a
R10: 0000000000000021 R11: ffffffff81ad1f60 R12: ffff888031b06a00
R13: 1ffff11006360d40 R14: ffff888031b06ad0 R15: 000000000000000a
FS:  0000000000000000(0000) GS:ffff888125b15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000013f53732c840 CR3: 000000007e326000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 usb_probe_interface+0x653/0xc60 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3772
 usb_set_configuration+0x1ad8/0x2180 drivers/usb/core/message.c:2268
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c3/0x3b0 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3772
 usb_new_device+0x99d/0x1620 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+0x28e8/0x4d30 drivers/usb/core/hub.c:5953
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa39/0x1400 kernel/workqueue.c:3405
 worker_thread+0xa4d/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x510/0xb60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:usbtest_probe+0x522/0xcc0 drivers/usb/misc/usbtest.c:2822
Code: 46 fa 45 85 ff 78 0a e8 cc 2c 46 fa e9 92 00 00 00 48 8b 04 24 4c 8d 78 0a 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 bf 06 00 00 45 0f b6 3f 44 89 fe 83 e6 01
RSP: 0018:ffffc90004a2ee20 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff88801cee4000 RCX: dffffc0000000000
RDX: ffff88801dae5d00 RSI: 00000000ffffffff RDI: 00000000ffffffff
RBP: 1ffff11006360d5a R08: 00000000da688922 R09: 0000000069bae40a
R10: 0000000000000021 R11: ffffffff81ad1f60 R12: ffff888031b06a00
R13: 1ffff11006360d40 R14: ffff888031b06ad0 R15: 000000000000000a
FS:  0000000000000000(0000) GS:ffff888125b15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000013f53732c840 CR3: 0000000075464000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	46 fa                	rex.RX cli
   2:	45 85 ff             	test   %r15d,%r15d
   5:	78 0a                	js     0x11
   7:	e8 cc 2c 46 fa       	call   0xfa462cd8
   c:	e9 92 00 00 00       	jmp    0xa3
  11:	48 8b 04 24          	mov    (%rsp),%rax
  15:	4c 8d 78 0a          	lea    0xa(%rax),%r15
  19:	4c 89 f8             	mov    %r15,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	0f b6 04 08          	movzbl (%rax,%rcx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 bf 06 00 00    	jne    0x6f5
  36:	45 0f b6 3f          	movzbl (%r15),%r15d
  3a:	44 89 fe             	mov    %r15d,%esi
  3d:	83 e6 01             	and    $0x1,%esi