------------[ cut here ]------------
kernel BUG at mm/filemap.c:1306!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.0.0-rc7-next-20190222 #41
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:end_page_writeback+0x4b8/0x4f0 mm/filemap.c:1306
Code: ef e8 8c f2 1d 00 e9 97 fc ff ff 48 89 df e8 7f f2 1d 00 e9 07 fd ff ff 4c 89 ef e8 72 f2 1d 00 e9 b8 fc ff ff e8 58 21 e6 ff <0f> 0b 4c 89 ef e8 5e f2 1d 00 e9 22 fd ff ff 4c 89 ef e8 51 f2 1d
RSP: 0018:ffff8880aa26fad8 EFLAGS: 00010206
RAX: ffff8880aa25c240 RBX: 0000000000000000 RCX: ffffffff818a31b5
RDX: 0000000000000100 RSI: ffffffff818a3438 RDI: 0000000000000005
RBP: ffff8880aa26fb00 R08: ffff8880aa25c240 R09: 0000000000000001
R10: ffffed1015d05bc7 R11: ffff8880ae82de3b R12: ffffea0001cd3b00
R13: ffffea0001cd3b08 R14: 0000000000000000 R15: ffffea0001cd9788
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa6c555bdb8 CR3: 000000008fcf9000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 page_endio+0x3c8/0x780 mm/filemap.c:1336
 mpage_end_io+0x1a5/0x320 fs/mpage.c:55
 bio_endio+0x5f8/0xad0 block/bio.c:1849
 req_bio_endio block/blk-core.c:196 [inline]
 blk_update_request+0x317/0xba0 block/blk-core.c:1457
 blk_mq_end_request+0x5b/0x550 block/blk-mq.c:558
 lo_complete_rq+0x210/0x2e0 drivers/block/loop.c:485
 blk_done_softirq+0x304/0x4d0 block/blk-softirq.c:37
 __do_softirq+0x266/0x95a kernel/softirq.c:293
 run_ksoftirqd kernel/softirq.c:655 [inline]
 run_ksoftirqd+0x8e/0x110 kernel/softirq.c:647
 smpboot_thread_fn+0x6ab/0xa10 kernel/smpboot.c:164
 kthread+0x357/0x430 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace 5a42ceebefd403af ]---
RIP: 0010:end_page_writeback+0x4b8/0x4f0 mm/filemap.c:1306
Code: ef e8 8c f2 1d 00 e9 97 fc ff ff 48 89 df e8 7f f2 1d 00 e9 07 fd ff ff 4c 89 ef e8 72 f2 1d 00 e9 b8 fc ff ff e8 58 21 e6 ff <0f> 0b 4c 89 ef e8 5e f2 1d 00 e9 22 fd ff ff 4c 89 ef e8 51 f2 1d
RSP: 0018:ffff8880aa26fad8 EFLAGS: 00010206
RAX: ffff8880aa25c240 RBX: 0000000000000000 RCX: ffffffff818a31b5
RDX: 0000000000000100 RSI: ffffffff818a3438 RDI: 0000000000000005
RBP: ffff8880aa26fb00 R08: ffff8880aa25c240 R09: 0000000000000001
R10: ffffed1015d05bc7 R11: ffff8880ae82de3b R12: ffffea0001cd3b00
R13: ffffea0001cd3b08 R14: 0000000000000000 R15: ffffea0001cd9788
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa6c555bdb8 CR3: 000000008fcf9000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400