handle_t problem

* Starting OpenSSH server                                               [ OK ]
 * Stopping userspace bootsplash                                         [ OK ]
 * Starting Send an event to indicate plymouth is up                     [ OK ]
 * Stopping save kernel messages                                         [ OK ]
 * Stopping Send an event to indicate plymouth is up                     [ OK ]
 * Starting automatic crash report generation                            [ OK ]
 * Restoring resolver state...                                           [ OK ] 
[    2.172981] BUG: unable to handle kernel NULL pointer dereference at 0000000000000021
[    2.173709] IP: ext4_mark_inode_dirty+0x30/0x1c0
[    2.174128] PGD 13324c067 
[    2.174129] P4D 13324c067 
[    2.174381] PUD 133212067 
[    2.174632] PMD 0 
[    2.174884] 
[    2.175218] Oops: 0002 [#1] SMP
[    2.175508] Modules linked in:
[    2.175801] CPU: 0 PID: 895 Comm: grub-editenv Not tainted 4.13.8 #166
[    2.176374] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[    2.177226] task: ffff96c1f55aadc0 task.stack: ffffb5f10103c000
[    2.177767] RIP: 0010:ext4_mark_inode_dirty+0x30/0x1c0
[    2.178232] RSP: 0018:ffffb5f10103fc00 EFLAGS: 00010202
[    2.178705] RAX: 00000000000076c3 RBX: ffff96c1f8b6d1c8 RCX: 0000000000000000
[    2.179345] RDX: ffff96c1f55aadc0 RSI: ffff96c1f8b6d1c8 RDI: 0000000000000001
[    2.179992] RBP: ffffb5f10103fc60 R08: 0000000000000000 R09: 000000005a2f6146
[    2.180618] R10: 0000000000000000 R11: 0000000000000000 R12: ffff96c1f8b6d1c8
[    2.181121] R13: 0000000000000001 R14: ffff96c1fa46c000 R15: ffff96c1fa46f000
[    2.181631] FS:  00007f576861e840(0000) GS:ffff96c1ffc00000(0000) knlGS:0000000000000000
[    2.182209] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.182655] CR2: 0000000000000021 CR3: 0000000137c7a000 CR4: 00000000003406f0
[    2.183162] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    2.183710] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    2.184321] Call Trace:
[    2.184545]  ? ext4_journal_check_start+0x12/0x90
[    2.184971]  ? __ext4_journal_start_sb+0x36/0x120
[    2.185399]  ext4_dirty_inode+0x48/0x70
[    2.185749]  __mark_inode_dirty+0x17b/0x390
[    2.186129]  generic_update_time+0x7b/0xd0
[    2.186504]  ? current_time+0x38/0x70
[    2.186841]  touch_atime+0x8d/0xb0
[    2.187156]  generic_file_read_iter+0x78e/0x940
[    2.187569]  ? page_cache_tree_insert+0xc0/0xc0
[    2.188018]  ext4_file_read_iter+0x56/0xf0
[    2.188387]  __vfs_read+0xce/0x140
[    2.188658]  vfs_read+0x93/0x130
[    2.188908]  SyS_read+0x46/0xa0
[    2.189157]  ? SyS_lseek+0x8a/0xb0
[    2.189420]  entry_SYSCALL_64_fastpath+0x1e/0xa9
[    2.189771] RIP: 0033:0x7f5767ef8330
[    2.190047] RSP: 002b:00007fffe96a3f58 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
[    2.190633] RAX: ffffffffffffffda RBX: 00007fffe96a4118 RCX: 00007f5767ef8330
[    2.191170] RDX: 0000000000000400 RSI: 0000000000bcd2a0 RDI: 0000000000000003
[    2.191785] RBP: 0000000000000004 R08: 0000000000000400 R09: 0000000000bcd2a0
[    2.192350] R10: 00007fffe96a3d80 R11: 0000000000000246 R12: 00007fffe96a5f37
[    2.192921] R13: 00007fffe96a5f24 R14: 0000000000000000 R15: 0000000000000000
[    2.193562] Code: 55 48 89 e5 41 57 41 56 41 55 41 54 49 89 fd 53 49 89 f4 48 83 ec 38 48 8b 46 28 48 85 ff 4c 8b b8 00 04 00 00 74 08 48 8b 46 40 <48> 89 47 20 e8 a7 e4 5b 00 4c 8b 75 08 0f 1f 44 00 00 48 8d 55 
[    2.195253] RIP: ext4_mark_inode_dirty+0x30/0x1c0 RSP: ffffb5f10103fc00
[    2.195903] CR2: 0000000000000021
[    2.196132] ---[ end trace 4f12365143857844 ]---
Killed
 * Stopping System V runlevel compatibility                              [ OK ]
[    2.245072] init: plymouth-upstart-bridge main process ended, respawning