usb 3-1: New USB device found, idVendor=0547, idProduct=2235, bcdDevice= 0.00
usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 3-1: Product: syz
usb 3-1: Manufacturer: syz
usb 3-1: SerialNumber: syz
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 UID: 0 PID: 804 Comm: kworker/1:2 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:usbtest_probe+0x3b9/0x1280 drivers/usb/misc/usbtest.c:2822
Code: 1a 47 fa 45 85 ff 79 5e e8 c4 1f 47 fa 48 8b 84 24 80 00 00 00 48 8d 58 0a 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 04 02 48 89 da 83 e2 07 38 d0 7f 08 84 c0 0f 85 58 0d 00 00
RSP: 0018:ffffc900047befc8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 000000000000000a RCX: ffffc9001b37d000
RDX: 0000000000000001 RSI: ffffffff87c33cdc RDI: ffff88802707ca80
RBP: ffff88804c99c990 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffff R11: 000000000000758b R12: ffff8880565cd0b0
R13: ffff8880364b7ad0 R14: ffff8880364b7a00 R15: 00000000ffffffff
FS:  0000000000000000(0000) GS:ffff888123ede000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4c17feb580 CR3: 0000000037afd000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 usb_probe_interface+0x303/0x8f0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:628 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:706
 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868
 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098
 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x64/0x160 drivers/base/bus.c:620
 device_add+0x121d/0x1970 drivers/base/core.c:3772
 usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2268
 usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250
 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:628 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:706
 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868
 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098
 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x64/0x160 drivers/base/bus.c:620
 device_add+0x121d/0x1970 drivers/base/core.c:3772
 usb_new_device.cold+0x685/0x115c 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+0x30a3/0x4a60 drivers/usb/core/hub.c:5953
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 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+0x3b9/0x1280 drivers/usb/misc/usbtest.c:2822
Code: 1a 47 fa 45 85 ff 79 5e e8 c4 1f 47 fa 48 8b 84 24 80 00 00 00 48 8d 58 0a 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 04 02 48 89 da 83 e2 07 38 d0 7f 08 84 c0 0f 85 58 0d 00 00
RSP: 0018:ffffc900047befc8 EFLAGS: 00010202

RAX: dffffc0000000000 RBX: 000000000000000a RCX: ffffc9001b37d000
RDX: 0000000000000001 RSI: ffffffff87c33cdc RDI: ffff88802707ca80
RBP: ffff88804c99c990 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffff R11: 000000000000758b R12: ffff8880565cd0b0
R13: ffff8880364b7ad0 R14: ffff8880364b7a00 R15: 00000000ffffffff
FS:  0000000000000000(0000) GS:ffff888123ede000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33920ff8 CR3: 000000000e994000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	1a 47 fa             	sbb    -0x6(%rdi),%al
   3:	45 85 ff             	test   %r15d,%r15d
   6:	79 5e                	jns    0x66
   8:	e8 c4 1f 47 fa       	call   0xfa471fd1
   d:	48 8b 84 24 80 00 00 	mov    0x80(%rsp),%rax
  14:	00
  15:	48 8d 58 0a          	lea    0xa(%rax),%rbx
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 da             	mov    %rbx,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax <-- trapping instruction
  2e:	48 89 da             	mov    %rbx,%rdx
  31:	83 e2 07             	and    $0x7,%edx
  34:	38 d0                	cmp    %dl,%al
  36:	7f 08                	jg     0x40
  38:	84 c0                	test   %al,%al
  3a:	0f 85 58 0d 00 00    	jne    0xd98