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 Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 6599 Comm: kworker/u4:4 Not tainted 4.17.0-rc6+ #63 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+0x195/0x1740 fs/fs-writeback.c:1937 RSP: 0018:ffff8801b8607270 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff814e2095 RDX: 000000000000000a RSI: ffffffff81cd3d3d RDI: 0000000000000050 RBP: ffff8801b8607750 R08: ffff8801cc7aa580 R09: ffffed003b5e46d2 R10: ffffed003b5e46d2 R11: ffff8801daf23693 R12: 0000000000000001 R13: 1ffff100370c0f37 R14: ffff8801b8607728 R15: ffff8801ce319018 FS: 0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000007003f8 CR3: 00000001d3df5000 CR4: 00000000001406e0 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:240 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 ee 13 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 3f 14 00 00 4c 8b 63 50 4d 85 e4 0f 84 a9 0e RIP: dev_name include/linux/device.h:1008 [inline] RSP: ffff8801b8607270 RIP: wb_workfn+0x195/0x1740 fs/fs-writeback.c:1937 RSP: ffff8801b8607270 ---[ end trace 2ecec08792711a1b ]---