kasan: CONFIG_KASAN_INLINE enabled
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
kasan: GPF could be caused by NULL-ptr deref or user memory access
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 16869 Comm: kworker/u4:6 Not tainted 4.17.0-rc2+ #24
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn
RIP: 0010:dev_name include/linux/device.h:1008 [inline]
RIP: 0010:wb_workfn+0x195/0x1770 fs/fs-writeback.c:1937
RSP: 0018:ffff8801b3f87270 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff814e1ec5
RDX: 000000000000000a RSI: ffffffff81cd29ad RDI: 0000000000000050
RBP: ffff8801b3f87750 R08: ffff8801b7828440 R09: ffffed003b5c46c2
R10: ffffed003b5c46c2 R11: ffff8801dae23613 R12: 0000000000000001
R13: 1ffff100367f0f37 R14: ffff8801b3f87728 R15: ffff8801ac998c98
FS:  0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f873a09edf8 CR3: 00000001d968b000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 process_one_work+0xc1e/0x1b50 kernel/workqueue.c:2145
 process_scheduled_works kernel/workqueue.c:2205 [inline]
 worker_thread+0xa30/0x1440 kernel/workqueue.c:2284
 kthread+0x345/0x410 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412
Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 ad 14 00 00 48 8b 9b 08 06 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 50 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 50 14 00 00 4c 8b 63 50 4d 85 e4 0f 84 d0 0e 
RIP: dev_name include/linux/device.h:1008 [inline] RSP: ffff8801b3f87270
RIP: wb_workfn+0x195/0x1770 fs/fs-writeback.c:1937 RSP: ffff8801b3f87270
general protection fault: 0000 [#2] SMP KASAN
---[ end trace 79178a89f32aab60 ]---
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 1861 Comm: kworker/u4:4 Tainted: G      D           4.17.0-rc2+ #24