list_del corruption, ffff880189887c28->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:47!
invalid opcode: 0000 [#1] SMP KASAN
CPU: 1 PID: 24 Comm: kworker/1:1 Not tainted 4.19.0-rc1-next-20180827+ #48
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events p9_read_work
RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 lib/list_debug.c:45
Code: 00 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 00 ee 3a 87 e8 7a 34 00 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 a0 ed 3a 87 e8 66 34 00 fe <0f> 0b 48 89 de 48 c7 c7 c0 ee 3a 87 e8 55 34 00 fe 0f 0b 48 89 de
RSP: 0018:ffff8801d985f5b0 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff880189887c28 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8163ac21 RDI: 0000000000000001
RBP: ffff8801d985f5c8 R08: ffff8801d9866640 R09: ffffed003b625010
R10: ffffed003b625010 R11: ffff8801db128087 R12: dead000000000200
R13: dead000000000100 R14: ffff8801c8377390 R15: ffff8801c8377350
FS:  0000000000000000(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000009d4fd0 CR3: 00000001b918b000 CR4: 00000000001406e0
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 p9_read_work+0xab4/0x1100 net/9p/trans_fd.c:379
 process_one_work+0xc73/0x1aa0 kernel/workqueue.c:2153
 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296
 kthread+0x35a/0x420 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)
---[ end trace ab946326725bb4e5 ]---
RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 lib/list_debug.c:45
Code: 00 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 00 ee 3a 87 e8 7a 34 00 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 a0 ed 3a 87 e8 66 34 00 fe <0f> 0b 48 89 de 48 c7 c7 c0 ee 3a 87 e8 55 34 00 fe 0f 0b 48 89 de
RSP: 0018:ffff8801d985f5b0 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff880189887c28 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8163ac21 RDI: 0000000000000001
RBP: ffff8801d985f5c8 R08: ffff8801d9866640 R09: ffffed003b625010
R10: ffffed003b625010 R11: ffff8801db128087 R12: dead000000000200
R13: dead000000000100 R14: ffff8801c8377390 R15: ffff8801c8377350
FS:  0000000000000000(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000009d4fd0 CR3: 00000001b918b000 CR4: 00000000001406e0