------------[ cut here ]------------
WARNING: CPU: 3 PID: 7503 at fs/nsfs.c:493 nsfs_fh_to_dentry+0x9de/0xe10 fs/nsfs.c:493
Modules linked in:
CPU: 3 UID: 0 PID: 7503 Comm: syz.3.573 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:nsfs_fh_to_dentry+0x9de/0xe10 fs/nsfs.c:493
Code: 92 50 ff e9 63 fe ff ff e8 1f b6 74 ff 90 0f 0b 90 e9 7b f8 ff ff e8 11 b6 74 ff 90 0f 0b 90 e9 ce f8 ff ff e8 03 b6 74 ff 90 <0f> 0b 90 e9 32 f9 ff ff e8 f5 b5 74 ff 49 8d 7d 10 48 b8 00 00 00
RSP: 0018:ffffc900046ffb38 EFLAGS: 00010287
RAX: 000000000000007d RBX: 0000000000000000 RCX: ffffc9000c402000
RDX: 0000000000080000 RSI: ffffffff82465edd RDI: 0000000000000004
RBP: ffff8880548e8d08 R08: 0000000000000004 R09: 00000000effffffe
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff920008dff68
R13: ffffffff90444a58 R14: 00000000effffffe R15: 0000000000000001
FS:  00007fdfa5bad6c0(0000) GS:ffff8880d7176000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdfa5bacf98 CR3: 0000000024647000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 exportfs_decode_fh_raw+0x167/0x7d0 fs/exportfs/expfs.c:456
 do_handle_to_path fs/fhandle.c:276 [inline]
 handle_to_path fs/fhandle.c:400 [inline]
 do_handle_open+0x702/0xc90 fs/fhandle.c:415
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdfa4d8eec9
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:00007fdfa5bad038 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
RAX: ffffffffffffffda RBX: 00007fdfa4fe5fa0 RCX: 00007fdfa4d8eec9
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000003
RBP: 00007fdfa4e11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdfa4fe6038 R14: 00007fdfa4fe5fa0 R15: 00007ffe81708c48
 </TASK>