loop2: rw=2049, want=2153, limit=128
attempt to access beyond end of device
loop2: rw=2049, want=2154, limit=128
attempt to access beyond end of device
loop2: rw=2049, want=2154, limit=128
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
PGD 1d712d067 P4D 1d712d067 PUD 1b2a1e067 PMD 0 
Oops: 0010 [#1] SMP KASAN
CPU: 1 PID: 1534 Comm: kswapd0 Not tainted 4.18.0-rc4-next-20180713+ #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff8801d3edf310 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff81a1ba2d
RDX: 1ffff10032ea5d96 RSI: ffff8801d3edf590 RDI: ffff88019752ecb0
RBP: ffff8801d3edf500 R08: ffff8801d3eb0140 R09: ffffed003ae02890
R10: ffffed003ae02890 R11: ffff8801d7014487 R12: ffff8801d3edf590
R13: ffff88019752ecb0 R14: ffff88019752ecd8 R15: 0000000000000080
FS:  0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001b2786000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 shrink_slab_memcg mm/vmscan.c:598 [inline]
 shrink_slab+0x861/0xa60 mm/vmscan.c:671
 shrink_node+0x429/0x16a0 mm/vmscan.c:2735
 kswapd_shrink_node mm/vmscan.c:3457 [inline]
 balance_pgdat+0x7ca/0x1010 mm/vmscan.c:3567
 kswapd+0x82e/0x12f0 mm/vmscan.c:3789
 kthread+0x345/0x410 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
CR2: 0000000000000000
---[ end trace 38b5a67e8bf844fa ]---
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff8801d3edf310 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff81a1ba2d
RDX: 1ffff10032ea5d96 RSI: ffff8801d3edf590 RDI: ffff88019752ecb0
RBP: ffff8801d3edf500 R08: ffff8801d3eb0140 R09: ffffed003ae02890
R10: ffffed003ae02890 R11: ffff8801d7014487 R12: ffff8801d3edf590
R13: ffff88019752ecb0 R14: ffff88019752ecd8 R15: 0000000000000080
FS:  0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001b2786000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400