BUG: unable to handle kernel NULL pointer dereference at           (null)
IP: __list_del_entry_valid+0x29/0x90 lib/list_debug.c:48
PGD 0 P4D 0 
Oops: 0000 [#1] SMP
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 7074 Comm: kworker/1:5 Not tainted 4.15.0-rc3-next-20171214+ #67
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: kvm-irqfd-cleanup irqfd_shutdown
RIP: 0010:__list_del_entry_valid+0x29/0x90 lib/list_debug.c:48
RSP: 0018:ffffc90000f3bde0 EFLAGS: 00010007
RAX: 0000000000000000 RBX: ffff8801fcec6f00 RCX: dead000000000200
RDX: 0000000000000000 RSI: 000000003754e463 RDI: ffff8801fca83e20
RBP: ffffc90000f3bde0 R08: 0000000000000001 R09: 000000000000000c
R10: ffffc90000f3bd58 R11: 000000000000000c R12: ffffc90000f3be30
R13: ffff8801fcec6f08 R14: 0000000000000000 R15: ffff8801fca83e08
FS:  0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000301e003 CR4: 00000000001626e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 __remove_wait_queue include/linux/wait.h:184 [inline]
 eventfd_ctx_remove_wait_queue+0x5a/0xf0 fs/eventfd.c:201
 irqfd_shutdown+0x2c/0x80 arch/x86/kvm/../../../virt/kvm/eventfd.c:128
 process_one_work+0x288/0x7a0 kernel/workqueue.c:2112
 worker_thread+0x43/0x4d0 kernel/workqueue.c:2246
 kthread+0x149/0x170 kernel/kthread.c:238
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:524
Code: 00 00 55 48 8b 07 48 b9 00 01 00 00 00 00 ad de 48 8b 57 08 48 89 e5 48 39 c8 74 27 48 b9 00 02 00 00 00 00 ad de 48 39 ca 74 2c <48> 8b 32 48 39 fe 75 35 48 8b 50 08 48 39 f2 75 40 b8 01 00 00 
RIP: __list_del_entry_valid+0x29/0x90 lib/list_debug.c:48 RSP: ffffc90000f3bde0
CR2: 0000000000000000
---[ end trace dff0fb090044dc0e ]---
Kernel panic - not syncing: Fatal exception
Shutting down cpus with NMI
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..