Oops: general protection fault, probably for non-canonical address 0xdffffc0000000016: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x00000000000000b0-0x00000000000000b7]
CPU: 0 UID: 0 PID: 5319 Comm: syz.0.0 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:create_link fs/configfs/symlink.c:81 [inline]
RIP: 0010:configfs_symlink+0x5fc/0x1030 fs/configfs/symlink.c:199
Code: 03 42 80 3c 20 00 74 08 48 89 df e8 1e da bd ff 41 bc b0 00 00 00 4c 03 23 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 e7 e8 f6 d9 bd ff 4d 8b 2c 24 4c 89 ef e8
RSP: 0018:ffffc9000e62fc80 EFLAGS: 00010202
RAX: 0000000000000016 RBX: ffff88803fbfcc48 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff8c4bed60 RDI: 00000000ffffffff
RBP: ffffc9000e62fd88 R08: ffffffff9057c237 R09: 1ffffffff20af846
R10: dffffc0000000000 R11: fffffbfff20af847 R12: 00000000000000b0
R13: 0000000000000000 R14: ffffffff8cb13fa8 R15: 1ffff92001cc5fa0
FS:  00007f0dbf8266c0(0000) GS:ffff88808c540000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055705991f1c0 CR3: 00000000400ce000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 vfs_symlink+0x18b/0x330 fs/namei.c:5660
 filename_symlinkat+0x1cd/0x410 fs/namei.c:5685
 __do_sys_symlinkat fs/namei.c:5705 [inline]
 __se_sys_symlinkat+0x4e/0x2b0 fs/namei.c:5700
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0dbe99e019
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:00007f0dbf825fe8 EFLAGS: 00000246 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 00007f0dbec26090 RCX: 00007f0dbe99e019
RDX: 0000200000000480 RSI: 0000000000000003 RDI: 0000200000000400
RBP: 00007f0dbea3500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0dbec26128 R14: 00007f0dbec26090 R15: 00007ffd8678b858
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:create_link fs/configfs/symlink.c:81 [inline]
RIP: 0010:configfs_symlink+0x5fc/0x1030 fs/configfs/symlink.c:199
Code: 03 42 80 3c 20 00 74 08 48 89 df e8 1e da bd ff 41 bc b0 00 00 00 4c 03 23 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 e7 e8 f6 d9 bd ff 4d 8b 2c 24 4c 89 ef e8
RSP: 0018:ffffc9000e62fc80 EFLAGS: 00010202
RAX: 0000000000000016 RBX: ffff88803fbfcc48 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff8c4bed60 RDI: 00000000ffffffff
RBP: ffffc9000e62fd88 R08: ffffffff9057c237 R09: 1ffffffff20af846
R10: dffffc0000000000 R11: fffffbfff20af847 R12: 00000000000000b0
R13: 0000000000000000 R14: ffffffff8cb13fa8 R15: 1ffff92001cc5fa0
FS:  00007f0dbf8266c0(0000) GS:ffff88808c540000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005570598f9168 CR3: 00000000400ce000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	03 42 80             	add    -0x80(%rdx),%eax
   3:	3c 20                	cmp    $0x20,%al
   5:	00 74 08 48          	add    %dh,0x48(%rax,%rcx,1)
   9:	89 df                	mov    %ebx,%edi
   b:	e8 1e da bd ff       	call   0xffbdda2e
  10:	41 bc b0 00 00 00    	mov    $0xb0,%r12d
  16:	4c 03 23             	add    (%rbx),%r12
  19:	4c 89 e0             	mov    %r12,%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:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 e7             	mov    %r12,%rdi
  33:	e8 f6 d9 bd ff       	call   0xffbdda2e
  38:	4d 8b 2c 24          	mov    (%r12),%r13
  3c:	4c 89 ef             	mov    %r13,%rdi
  3f:	e8                   	.byte 0xe8