Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 2 UID: 0 PID: 5927 Comm: syz.0.7 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:dummy_udc_start+0x91/0x1d0 drivers/usb/gadget/udc/dummy_hcd.c:1022
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 28 01 00 00 4c 8b ab 90 06 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 10 01 00 00 83 ed 01 bf 02 00 00 00 49 8b 5d 00
RSP: 0018:ffffc900069dfb28 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff888021580c00 RCX: ffffc9000c803000
RDX: 0000000000000000 RSI: ffffffff87ce6d67 RDI: ffff888021581290
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000005
R10: 0000000000000003 R11: 0000000000000000 R12: ffff88802aa0a050
R13: 0000000000000000 R14: ffff888025f8e4f1 R15: ffff888025f8e008
FS:  0000000000000000(0000) GS:ffff888096de1000(0063) knlGS:00000000f545cb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000008025f018 CR3: 000000006d05a000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 usb_gadget_udc_start_locked drivers/usb/gadget/udc/core.c:1237 [inline]
 gadget_bind_driver+0x4ac/0xbf0 drivers/usb/gadget/udc/core.c:1667
 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
 __driver_attach+0x21f/0x5b0 drivers/base/dd.c:1292
 bus_for_each_dev+0x13e/0x1d0 drivers/base/bus.c:383
 bus_add_driver+0x305/0x5b0 drivers/base/bus.c:763
 driver_register+0x1e2/0x360 drivers/base/driver.c:174
 usb_gadget_register_driver_owner+0x132/0x210 drivers/usb/gadget/udc/core.c:1752
 raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:596 [inline]
 raw_ioctl+0x1a85/0x2b80 drivers/usb/gadget/legacy/raw_gadget.c:1307
 __do_compat_sys_ioctl fs/ioctl.c:695 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:638 [inline]
 __ia32_compat_sys_ioctl+0x2cf/0x360 fs/ioctl.c:638
 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: 0023:0xf708efec
Code: Unable to access opcode bytes at 0xf708efc2.
RSP: 002b:00000000f545a424 EFLAGS: 00000292 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 000000000000000c RCX: 0000000000005501
RDX: 0000000000000000 RSI: 00000000f7457ff4 RDI: 00000000f545b4c0
RBP: 00000000f7457ff4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dummy_udc_start+0x91/0x1d0 drivers/usb/gadget/udc/dummy_hcd.c:1022
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 28 01 00 00 4c 8b ab 90 06 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 10 01 00 00 83 ed 01 bf 02 00 00 00 49 8b 5d 00
RSP: 0018:ffffc900069dfb28 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff888021580c00 RCX: ffffc9000c803000
RDX: 0000000000000000 RSI: ffffffff87ce6d67 RDI: ffff888021581290
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000005
R10: 0000000000000003 R11: 0000000000000000 R12: ffff88802aa0a050
R13: 0000000000000000 R14: ffff888025f8e4f1 R15: ffff888025f8e008
FS:  0000000000000000(0000) GS:ffff888096de1000(0063) knlGS:00000000f545cb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f708f000 CR3: 000000006d05a000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	df 48 89             	fisttps -0x77(%rax)
   3:	fa                   	cli
   4:	48 c1 ea 03          	shr    $0x3,%rdx
   8:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   c:	0f 85 28 01 00 00    	jne    0x13a
  12:	4c 8b ab 90 06 00 00 	mov    0x690(%rbx),%r13
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	4c 89 ea             	mov    %r13,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 10 01 00 00    	jne    0x144
  34:	83 ed 01             	sub    $0x1,%ebp
  37:	bf 02 00 00 00       	mov    $0x2,%edi
  3c:	49 8b 5d 00          	mov    0x0(%r13),%rbx