loop6: detected capacity change from 0 to 256
exFAT-fs (loop6): start_clu is invalid cluster(0x400)
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 1 UID: 0 PID: 11539 Comm: syz.6.622 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_utf16_to_nls+0x21c/0x840
Code: 5c 29 ff 66 41 83 fc 7f 77 14 e8 df 58 29 ff e9 b6 00 00 00 e8 d5 58 29 ff e9 a9 00 00 00 48 8b 4c 24 40 48 89 c8 48 c1 e8 03 <42> 80 3c 38 00 74 0f 48 8b 7c 24 40 e8 83 6e 8e ff 48 8b 4c 24 40
RSP: 0018:ffffc90002f8f760 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000004 RCX: 0000000000000010
RDX: ffff888021849d00 RSI: 00000000000000e1 RDI: 0000000000000080
RBP: ffffc90002f8f850 R08: 0000000000000005 R09: 0000000000000000
R10: ffffc90002f8f7e0 R11: fffff520005f1efc R12: 00000000000000e1
R13: ffffc90002f8fa48 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f0f7ef2e6c0(0000) GS:ffff8881a3a0a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d302ff8 CR3: 0000000111b96000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 exfat_iterate+0x19a7/0x2050
 wrap_directory_iterator+0x96/0xe0
 iterate_dir+0x399/0x570
 __se_sys_getdents64+0xe4/0x260
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0f7e18ec29
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:00007f0f7ef2e038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f0f7e3d5fa0 RCX: 00007f0f7e18ec29
RDX: 0000000000001000 RSI: 0000200000000f80 RDI: 0000000000000009
RBP: 00007f0f7e211e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0f7e3d6038 R14: 00007f0f7e3d5fa0 R15: 00007ffe444dfef8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:exfat_utf16_to_nls+0x21c/0x840
Code: 5c 29 ff 66 41 83 fc 7f 77 14 e8 df 58 29 ff e9 b6 00 00 00 e8 d5 58 29 ff e9 a9 00 00 00 48 8b 4c 24 40 48 89 c8 48 c1 e8 03 <42> 80 3c 38 00 74 0f 48 8b 7c 24 40 e8 83 6e 8e ff 48 8b 4c 24 40
RSP: 0018:ffffc90002f8f760 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000004 RCX: 0000000000000010
RDX: ffff888021849d00 RSI: 00000000000000e1 RDI: 0000000000000080
RBP: ffffc90002f8f850 R08: 0000000000000005 R09: 0000000000000000
R10: ffffc90002f8f7e0 R11: fffff520005f1efc R12: 00000000000000e1
R13: ffffc90002f8fa48 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f0f7ef2e6c0(0000) GS:ffff8881a3a0a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d302ff8 CR3: 0000000111b96000 CR4: 00000000000006f0
