Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 3 UID: 0 PID: 20504 Comm: syz.1.2283 Tainted: G S           L      syzkaller #0 PREEMPT(full) 
Tainted: [S]=CPU_OUT_OF_SPEC, [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:dummy_udc_stop+0x8f/0x180 drivers/usb/gadget/udc/dummy_hcd.c:1053
Code: c1 ea 03 80 3c 02 00 0f 85 f9 00 00 00 48 8b 9b 90 06 00 00 e8 d2 e0 3a fa 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 c5 00 00 00 48 8b 1b 48 89 df e8 fc 27 ed 03 48
RSP: 0018:ffffc9000610f900 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000cf42000
RDX: 0000000000000000 RSI: ffffffff87cecd2e RDI: ffff88802250d290
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000005
R10: 0000000000000003 R11: 0000000000000000 R12: ffff888050fba438
R13: ffff8880008ab540 R14: ffff88802250cc00 R15: ffffffff8cb7c320
FS:  0000000000000000(0000) GS:ffff888096ee1000(0063) knlGS:00000000f53d6b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f72ae9ea CR3: 0000000060d71000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 usb_gadget_udc_stop_locked drivers/usb/gadget/udc/core.c:1265 [inline]
 gadget_unbind_driver+0x2ca/0x4f0 drivers/usb/gadget/udc/core.c:1727
 device_remove+0xcb/0x180 drivers/base/dd.c:616
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372
 bus_remove_device+0x2bc/0x560 drivers/base/bus.c:664
 device_del+0x376/0x9b0 drivers/base/core.c:3961
 usb_del_gadget+0x1b2/0x2d0 drivers/usb/gadget/udc/core.c:1591
 usb_del_gadget_udc+0x15/0x30 drivers/usb/gadget/udc/core.c:1614
 platform_remove+0x5f/0x80 drivers/base/platform.c:1456
 device_remove+0xcb/0x180 drivers/base/dd.c:616
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372
 unbind_store+0xf8/0x110 drivers/base/bus.c:244
 drv_attr_store+0x74/0xb0 drivers/base/bus.c:125
 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6ac/0x1050 fs/read_write.c:687
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xe7/0x970 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:332
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f14fec
Code: Unable to access opcode bytes at 0xf7f14fc2.
RSP: 002b:00000000f53d650c EFLAGS: 00000292 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000080000280
RDX: 000000000000000c RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dummy_udc_stop+0x8f/0x180 drivers/usb/gadget/udc/dummy_hcd.c:1053
Code: c1 ea 03 80 3c 02 00 0f 85 f9 00 00 00 48 8b 9b 90 06 00 00 e8 d2 e0 3a fa 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 c5 00 00 00 48 8b 1b 48 89 df e8 fc 27 ed 03 48
RSP: 0018:ffffc9000610f900 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000cf42000
RDX: 0000000000000000 RSI: ffffffff87cecd2e RDI: ffff88802250d290
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000005
R10: 0000000000000003 R11: 0000000000000000 R12: ffff888050fba438
R13: ffff8880008ab540 R14: ffff88802250cc00 R15: ffffffff8cb7c320
FS:  0000000000000000(0000) GS:ffff888096ee1000(0063) knlGS:00000000f53d6b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f53b5da4 CR3: 0000000060d71000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	c1 ea 03             	shr    $0x3,%edx
   3:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   7:	0f 85 f9 00 00 00    	jne    0x106
   d:	48 8b 9b 90 06 00 00 	mov    0x690(%rbx),%rbx
  14:	e8 d2 e0 3a fa       	call   0xfa3ae0eb
  19:	48 89 da             	mov    %rbx,%rdx
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 c5 00 00 00    	jne    0xf9
  34:	48 8b 1b             	mov    (%rbx),%rbx
  37:	48 89 df             	mov    %rbx,%rdi
  3a:	e8 fc 27 ed 03       	call   0x3ed283b
  3f:	48                   	rex.W