Buffer I/O error on dev loop0, logical block 7, async page read
BUG: unable to handle kernel NULL pointer dereference at 0000000000000286
IP: 0x286
PGD 1d59da067 
P4D 1d59da067 
PUD 1d50b6067 
PMD 0 

Oops: 0010 [#1] SMP KASAN
Dumping ftrace buffer:
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Modules linked in:
CPU: 0 PID: 5804 Comm: kworker/u4:9 Not tainted 4.13.0-rc6-next-20170825+ #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: kstrp strp_work
task: ffff8801ca746600 task.stack: ffff8801cbfc0000
RIP: 0010:0x286
RSP: 0018:ffff8801cbfc7520 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8801bf525b78 RCX: 0000000000000000
RDX: 1ffff10037ea4b81 RSI: ffffffff85b37b20 RDI: ffff8801bf525a48
RBP: ffff8801cbfc7538 R08: ffff8801cbfc6e98 R09: ffff8801cbfc6ea8
R10: ffff8801cbfc6e20 R11: 1ffff100394e8f53 R12: ffff8801bf525a48
R13: ffff8801c7864a18 R14: ffff8801cbfc7980 R15: ffff8801c7864a00
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000286 CR3: 00000001c45e7000 CR4: 00000000001406f0
DR0: 0000000020001000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 process_one_work+0xbfd/0x1be0 kernel/workqueue.c:2098
 worker_thread+0x223/0x1860 kernel/workqueue.c:2233
 kthread+0x39c/0x470 kernel/kthread.c:231
 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431
Code:  Bad RIP value.
RIP: 0x286 RSP: ffff8801cbfc7520
CR2: 0000000000000286
---[ end trace fe2199d50c17debb ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..