loop1: detected capacity change from 0 to 256
exFAT-fs (loop1): failed to load upcase table (idx : 0x00011f3f, chksum : 0x23ae2a4b, utbl_chksum : 0xe619d30d)
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 1 UID: 0 PID: 6039 Comm: syz.1.18 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:exfat_convert_char_to_ucs2 fs/exfat/nls.c:418 [inline]
RIP: 0010:exfat_nls_to_ucs2 fs/exfat/nls.c:607 [inline]
RIP: 0010:exfat_nls_to_utf16+0x21c/0xc10 fs/exfat/nls.c:647
Code: 84 c0 0f 85 d9 02 00 00 48 8b 44 24 20 48 8b 4c 24 10 66 44 89 3c 48 bb 01 00 00 00 eb 6e 4c 8b 7c 24 50 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 d5 2e 8e ff 4c 89 f8 4c 8b 7c 24
RSP: 0018:ffffc900036d7000 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffffc900036d75f0 RCX: 0000000000000000
RDX: ffff8880225b0000 RSI: 00000000000000e3 RDI: 00000000000000ff
RBP: ffffc900036d7550 R08: ffffc900036d727f R09: 0000000000000000
R10: ffffc900036d7080 R11: fffff520006dae50 R12: dffffc0000000000
R13: 0000000000000000 R14: 1ffff920006daee6 R15: 0000000000000018
FS:  00007f272c6136c0(0000) GS:ffff8881a39fc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30f63fff CR3: 000000010add4000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 exfat_ioctl_set_volume_label fs/exfat/file.c:524 [inline]
 exfat_ioctl+0x815/0x1100 fs/exfat/file.c:554
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f272b78ec29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f272c613038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f272b9d5fa0 RCX: 00007f272b78ec29
RDX: 00002000000000c0 RSI: 0000000041009432 RDI: 0000000000000004
RBP: 00007f272b811e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f272b9d6038 R14: 00007f272b9d5fa0 R15: 00007ffee9a00558
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:exfat_convert_char_to_ucs2 fs/exfat/nls.c:418 [inline]
RIP: 0010:exfat_nls_to_ucs2 fs/exfat/nls.c:607 [inline]
RIP: 0010:exfat_nls_to_utf16+0x21c/0xc10 fs/exfat/nls.c:647
Code: 84 c0 0f 85 d9 02 00 00 48 8b 44 24 20 48 8b 4c 24 10 66 44 89 3c 48 bb 01 00 00 00 eb 6e 4c 8b 7c 24 50 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 d5 2e 8e ff 4c 89 f8 4c 8b 7c 24
RSP: 0018:ffffc900036d7000 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffffc900036d75f0 RCX: 0000000000000000
RDX: ffff8880225b0000 RSI: 00000000000000e3 RDI: 00000000000000ff
RBP: ffffc900036d7550 R08: ffffc900036d727f R09: 0000000000000000
R10: ffffc900036d7080 R11: fffff520006dae50 R12: dffffc0000000000
R13: 0000000000000000 R14: 1ffff920006daee6 R15: 0000000000000018
FS:  00007f272c6136c0(0000) GS:ffff8881a39fc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30f63fff CR3: 000000010add4000 CR4: 00000000000006f0
----------------
Code disassembly (best guess):
   0:	84 c0                	test   %al,%al
   2:	0f 85 d9 02 00 00    	jne    0x2e1
   8:	48 8b 44 24 20       	mov    0x20(%rsp),%rax
   d:	48 8b 4c 24 10       	mov    0x10(%rsp),%rcx
  12:	66 44 89 3c 48       	mov    %r15w,(%rax,%rcx,2)
  17:	bb 01 00 00 00       	mov    $0x1,%ebx
  1c:	eb 6e                	jmp    0x8c
  1e:	4c 8b 7c 24 50       	mov    0x50(%rsp),%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 ff             	mov    %r15,%rdi
  34:	e8 d5 2e 8e ff       	call   0xff8e2f0e
  39:	4c 89 f8             	mov    %r15,%rax
  3c:	4c                   	rex.WR
  3d:	8b                   	.byte 0x8b
  3e:	7c 24                	jl     0x64
