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: 11526 Comm: syz-executor 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: 59 29 ff 66 41 83 fc 7f 77 14 e8 5f 55 29 ff e9 b6 00 00 00 e8 55 55 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:ffffc90002cdf760 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000004 RCX: 0000000000000010
RDX: ffff888023321d00 RSI: 00000000000000e1 RDI: 0000000000000080
RBP: ffffc90002cdf850 R08: 0000000000000005 R09: 0000000000000000
R10: ffffc90002cdf7e0 R11: fffff5200059befc R12: 00000000000000e1
R13: ffffc90002cdfa48 R14: 0000000000000000 R15: dffffc0000000000
FS:  000055558e7bb500(0000) GS:ffff8881a3a0a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558e7de608 CR3: 000000010f3c8000 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: 0033:0x7f2b725c1593
Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 62 3e f8 ff 66 90 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 c7 c2 a8 ff ff ff f7 d8
RSP: 002b:00007ffceb75d678 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 000055558e7d6600 RCX: 00007f2b725c1593
RDX: 0000000000008000 RSI: 000055558e7d6600 RDI: 0000000000000005
RBP: 000055558e7d65d4 R08: 0000000000028a41 R09: 0000000000000000
R10: 00007f2b727a7cc0 R11: 0000000000000293 R12: ffffffffffffffa8
R13: 0000000000000010 R14: 000055558e7d65d0 R15: 00007ffceb75f930
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:exfat_utf16_to_nls+0x21c/0x840
Code: 59 29 ff 66 41 83 fc 7f 77 14 e8 5f 55 29 ff e9 b6 00 00 00 e8 55 55 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:ffffc90002cdf760 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000004 RCX: 0000000000000010
RDX: ffff888023321d00 RSI: 00000000000000e1 RDI: 0000000000000080
RBP: ffffc90002cdf850 R08: 0000000000000005 R09: 0000000000000000
R10: ffffc90002cdf7e0 R11: fffff5200059befc R12: 00000000000000e1
R13: ffffc90002cdfa48 R14: 0000000000000000 R15: dffffc0000000000
FS:  000055558e7bb500(0000) GS:ffff8881a3a0a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a6311d4950 CR3: 000000010f3c8000 CR4: 00000000000006f0
