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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: 0 PID: 10522 Comm: syz-executor6 Not tainted 4.13.0-next-20170905+ #15
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
task: ffff88003a9b44c0 task.stack: ffff880029e28000
RIP: 0010:dnotify_free_mark+0x51/0x60 fs/notify/dnotify/dnotify.c:131
RSP: 0018:ffff880029e2fb20 EFLAGS: 00010246
RAX: 0000000000010000 RBX: ffff88003d30c7d0 RCX: ffffc9000358f000
RDX: 0000000000010000 RSI: ffffffff81bc5ac1 RDI: ffff88003d30c850
RBP: ffff880029e2fb28 R08: ffff880029e2f578 R09: 0000000000000000
R10: ffffffff870a7e60 R11: 0000000000000000 R12: ffff88003d30c7d0
R13: ffffffff84f24060 R14: ffff880029e2fc60 R15: 0000000000000000
FS:  00007f919c1a4700(0000) GS:ffff88003ec00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020034000 CR3: 000000003ca2f000 CR4: 00000000000006f0
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+0xa24/0xba0 fs/notify/dnotify/dnotify.c:371
 do_fcntl+0x9f5/0x1060 fs/fcntl.c:412
 SYSC_fcntl fs/fcntl.c:462 [inline]
 SyS_fcntl+0xdc/0x120 fs/fcntl.c:447
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x447299
RSP: 002b:00007f919c1a3c08 EFLAGS: 00000282 ORIG_RAX: 0000000000000048
RAX: ffffffffffffffda RBX: 0000000000000017 RCX: 0000000000447299
RDX: ffffffffffffffff RSI: 0000000000000402 RDI: 0000000000000017
RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000282 R12: 00000000004a8bf7
R13: 0000000000000000 R14: 00007f919c1a39c8 R15: 00007f919c1a3b38
Code: 3c 02 00 75 28 48 83 bb 80 00 00 00 00 75 17 e8 36 73 b1 ff 48 8b 3d 7f b5 60 04 48 89 de e8 d7 f6 e5 ff 5b 5d c3 e8 1f 73 b1 ff <0f> 0b e8 48 32 e6 ff eb d1 66 0f 1f 44 00 00 55 48 89 e5 41 57 
RIP: dnotify_free_mark+0x51/0x60 fs/notify/dnotify/dnotify.c:131 RSP: ffff880029e2fb20
---[ end trace 3ab729a09a88ad74 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..