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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: 1 PID: 32241 Comm: syz-executor7 Not tainted 4.14.0-rc8+ #167
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801ae28a1c0 task.stack: ffff8801c4688000
RIP: 0010:dnotify_free_mark+0x4b/0x60 fs/notify/dnotify/dnotify.c:131
RSP: 0018:ffff8801c468fb20 EFLAGS: 00010246
RAX: 0000000000010000 RBX: ffff8801d2573900 RCX: ffffc90002a0a000
RDX: 0000000000010000 RSI: ffffffff81bca17b RDI: ffff8801d2573978
RBP: ffff8801c468fb28 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff8729f640 R11: 0000000000000000 R12: ffff8801d2573900
R13: ffffffff85124d80 R14: ffff8801c468fc60 R15: 0000000000000000
FS:  00007fc772aee700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000202e3000 CR3: 00000001c7409000 CR4: 00000000001406e0
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:413
 SYSC_fcntl fs/fcntl.c:463 [inline]
 SyS_fcntl+0xd6/0x110 fs/fcntl.c:448
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452869
RSP: 002b:00007fc772aedbe8 EFLAGS: 00000212 ORIG_RAX: 0000000000000048
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452869
RDX: ffffffffffffffff RSI: 0000000000000402 RDI: 0000000000000013
RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b7550
R13: 00007fc772aedb58 R14: 00000000004b7560 R15: 0000000000000000
Code: ea 03 80 3c 02 00 75 25 48 83 7b 78 00 75 17 e8 7c fd b0 ff 48 8b 3d 85 e6 7f 04 48 89 de e8 1d a1 e5 ff 5b 5d c3 e8 65 fd b0 ff <0f> 0b e8 8e dc e5 ff eb d4 66 90 66 2e 0f 1f 84 00 00 00 00 00 
RIP: dnotify_free_mark+0x4b/0x60 fs/notify/dnotify/dnotify.c:131 RSP: ffff8801c468fb20
---[ end trace c5208befc2a608d1 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..