Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067]
CPU: 3 UID: 0 PID: 14504 Comm: syz.4.2925 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:configfs_depend_item_unlocked+0x24a/0x6a0 fs/configfs/dir.c:1246
Code: 1c fe 08 c7 44 24 1c fe ff ff ff e9 a6 02 00 00 e8 cb 17 49 ff 48 8d 7d 60 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 1d 04 00 00 48 bb 00 00 00 00 00 fc ff df 4c 8b
RSP: 0018:ffffc9000590fb28 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90031c01000
RDX: 000000000000000c RSI: ffffffff82c15bb5 RDI: 0000000000000060
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888057879400 R14: ffff888057879400 R15: ffff8880578794b8
FS:  00007f3121bab6c0(0000) GS:ffff8880d5ede000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000013292000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 usbg_make_tpg+0x261/0x620 drivers/usb/gadget/function/f_tcm.c:1686
 target_fabric_make_tpg+0xab/0x8c0 drivers/target/target_core_fabric_configfs.c:939
 configfs_mkdir+0x51e/0xb70 fs/configfs/dir.c:1360
 vfs_mkdir+0x361/0x850 fs/namei.c:5276
 filename_mkdirat+0x48b/0x5e0 fs/namei.c:5309
 __do_sys_mkdirat fs/namei.c:5330 [inline]
 __se_sys_mkdirat fs/namei.c:5327 [inline]
 __x64_sys_mkdirat+0x89/0xc0 fs/namei.c:5327
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3120d9e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3121bab028 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f3121026090 RCX: 00007f3120d9e0d9
RDX: 00000000000001ff RSI: 0000200000000740 RDI: ffffffffffffff9c
RBP: 00007f3120e35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3121026128 R14: 00007f3121026090 R15: 00007fff37c642d8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:configfs_depend_item_unlocked+0x24a/0x6a0 fs/configfs/dir.c:1246
Code: 1c fe 08 c7 44 24 1c fe ff ff ff e9 a6 02 00 00 e8 cb 17 49 ff 48 8d 7d 60 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 1d 04 00 00 48 bb 00 00 00 00 00 fc ff df 4c 8b
RSP: 0018:ffffc9000590fb28 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90031c01000
RDX: 000000000000000c RSI: ffffffff82c15bb5 RDI: 0000000000000060
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888057879400 R14: ffff888057879400 R15: ffff8880578794b8
FS:  00007f3121bab6c0(0000) GS:ffff8880d5ede000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3121bcaf00 CR3: 0000000013292000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	fe 08                	decb   (%rax)
   2:	c7 44 24 1c fe ff ff 	movl   $0xfffffffe,0x1c(%rsp)
   9:	ff
   a:	e9 a6 02 00 00       	jmp    0x2b5
   f:	e8 cb 17 49 ff       	call   0xff4917df
  14:	48 8d 7d 60          	lea    0x60(%rbp),%rdi
  18:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1f:	fc ff df
  22:	48 89 fa             	mov    %rdi,%rdx
  25:	48 c1 ea 03          	shr    $0x3,%rdx
* 29:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2d:	0f 85 1d 04 00 00    	jne    0x450
  33:	48 bb 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbx
  3a:	fc ff df
  3d:	4c                   	rex.WR
  3e:	8b                   	.byte 0x8b