kernel BUG at fs/notify/dnotify/dnotify.c:131!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 3 PID: 13494 Comm: syz-executor6 Not tainted 4.14.0-rc5-next-20171018+ #8
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
task: ffff880069ba6000 task.stack: ffff88004ca50000
RIP: 0010:dnotify_free_mark+0x4b/0x60 fs/notify/dnotify/dnotify.c:131
RSP: 0018:ffff88004ca57b20 EFLAGS: 00010246
RAX: 0000000000010000 RBX: ffff88004cbd93c0 RCX: ffffffff81bddaab
RDX: 0000000000010000 RSI: ffffc900027a3000 RDI: ffff88004cbd9438
RBP: ffff88004ca57b28 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff870692e0 R11: 0000000000000000 R12: ffff88004cbd93c0
R13: ffffffff85126320 R14: ffff88004ca57c60 R15: 0000000000000000
FS:  00007f8677581700(0000) GS:ffff88006df00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa970fa86cc CR3: 000000006a43d000 CR4: 00000000000026e0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 fsnotify_final_mark_destroy+0x7d/0xc0 fs/notify/mark.c:202
 fsnotify_put_mark+0x469/0x730 fs/notify/mark.c:215
 fcntl_dirnotify+0xa12/0xb90 fs/notify/dnotify/dnotify.c:371
 do_fcntl+0x9e0/0x1050 fs/fcntl.c:412
 SYSC_fcntl fs/fcntl.c:462 [inline]
 SyS_fcntl+0xd6/0x110 fs/fcntl.c:447
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x447c89
RSP: 002b:00007f8677580bd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000048
RAX: ffffffffffffffda RBX: 00007f86775816cc RCX: 0000000000447c89
RDX: 0000000000000005 RSI: 0000000000000402 RDI: 0000000000000014
RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a96f0
R13: 0000000000000000 R14: 00007f86775809c8 R15: 00007f8677580b38
Code: ea 03 80 3c 02 00 75 25 48 83 7b 78 00 75 17 e8 0c e4 b0 ff 48 8b 3d 95 97 5b 04 48 89 de e8 0d 00 e6 ff 5b 5d c3 e8 f5 e3 b0 ff <0f> 0b e8 9e 3b e6 ff eb d4 66 66 66 2e 0f 1f 84 00 00 00 00 00 
RIP: dnotify_free_mark+0x4b/0x60 fs/notify/dnotify/dnotify.c:131 RSP: ffff88004ca57b20
---[ end trace d74b4875f9758472 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..