list_del corruption, ffff880199dc7268->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:47!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 2681 Comm: kworker/1:2 Not tainted 4.19.0-rc5+ #28
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: d4 fd 0f 0b 4c 89 e2 48 89 de 48 c7 c7 c0 a3 44 88 e8 ea 6b d4 fd 0f 0b 4c 89 ea 48 89 de 48 c7 c7 60 a3 44 88 e8 d6 6b d4 fd <0f> 0b 48 89 de 48 c7 c7 80 a4 44 88 e8 c5 6b d4 fd 0f 0b 48 89 de
RSP: 0018:ffff8801cc0175b8 EFLAGS: 00010282
RAX: 000000000000004e RBX: ffff880199dc7268 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81650cb5 RDI: 0000000000000005
RBP: ffff8801cc0175d0 R08: ffff8801cc6ec380 R09: ffffed003b5a4fe8
R10: ffffed003b5a4fe8 R11: ffff8801dad27f47 R12: dead000000000200
R13: dead000000000100 R14: ffff8801d213b550 R15: ffff8801d213b510
FS:  0000000000000000(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000214ce80 CR3: 00000001b86d1000 CR4: 00000000001406e0
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 p9_read_work+0xab6/0x10e0 net/9p/trans_fd.c:379
 process_one_work+0xc90/0x1b90 kernel/workqueue.c:2153
 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
 kthread+0x35a/0x420 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413
Modules linked in:
---[ end trace 5ff029d16a2b8a27 ]---
RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 lib/list_debug.c:45
kobject: '9p-31' (000000006d07cbdb): kobject_uevent_env
Code: d4 fd 0f 0b 4c 89 e2 48 89 de 48 c7 c7 c0 a3 44 88 e8 ea 6b d4 fd 0f 0b 4c 89 ea 48 89 de 48 c7 c7 60 a3 44 88 e8 d6 6b d4 fd <0f> 0b 48 89 de 48 c7 c7 80 a4 44 88 e8 c5 6b d4 fd 0f 0b 48 89 de
kobject: '9p-31' (000000006d07cbdb): fill_kobj_path: path = '/devices/virtual/bdi/9p-31'
RSP: 0018:ffff8801cc0175b8 EFLAGS: 00010282
RAX: 000000000000004e RBX: ffff880199dc7268 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81650cb5 RDI: 0000000000000005
RBP: ffff8801cc0175d0 R08: ffff8801cc6ec380 R09: ffffed003b5a4fe8
R10: ffffed003b5a4fe8 R11: ffff8801dad27f47 R12: dead000000000200
R13: dead000000000100 R14: ffff8801d213b550 R15: ffff8801d213b510
FS:  0000000000000000(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000214ce80 CR3: 00000001b86d1000 CR4: 00000000001406e0