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
CPU: 1 PID: 62 Comm: kworker/u4:2 Not tainted 4.18.0-rc1+ #109
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:1019 [inline]
RIP: 0010:wb_workfn+0x19d/0x1760 fs/fs-writeback.c:1937
Code: 48 c1 ea 03 80 3c 02 00 0f 85 96 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 39 14 00 00 4c 8b 63 50 4d 85 e4 0f 84 c5 0e 00 
RSP: 0018:ffff8801d966f250 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff814fee45
RDX: 000000000000000a RSI: ffffffff81d18545 RDI: 0000000000000050
RBP: ffff8801d966f730 R08: ffff8801d9660040 R09: ffffed003b5e46d6
R10: ffffed003b5e46d6 R11: ffff8801daf236b3 R12: 0000000000000001
R13: 1ffff1003b2cdf33 R14: ffff8801d966f708 R15: ffff8801c9793858
FS:  0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001b95e80 CR3: 00000001b9f16000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 process_one_work+0xc73/0x1ba0 kernel/workqueue.c:2153
 process_scheduled_works kernel/workqueue.c:2212 [inline]
 worker_thread+0x9ed/0x13c0 kernel/workqueue.c:2301
 kthread+0x345/0x410 kernel/kthread.c:240
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace f6eed860e8b75a85 ]---
RIP: 0010:dev_name include/linux/device.h:1019 [inline]
RIP: 0010:wb_workfn+0x19d/0x1760 fs/fs-writeback.c:1937
Code: 48 c1 ea 03 80 3c 02 00 0f 85 96 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 39 14 00 00 4c 8b 63 50 4d 85 e4 0f 84 c5 0e 00 
RSP: 0018:ffff8801d966f250 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff814fee45
RDX: 000000000000000a RSI: ffffffff81d18545 RDI: 0000000000000050
RBP: ffff8801d966f730 R08: ffff8801d9660040 R09: ffffed003b5e46d6
R10: ffffed003b5e46d6 R11: ffff8801daf236b3 R12: 0000000000000001
R13: 1ffff1003b2cdf33 R14: ffff8801d966f708 R15: ffff8801c9793858
FS:  0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001b95e80 CR3: 0000000008e6a000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400