list_del corruption, ffff8880882cdfb0->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:45!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 2988 Comm: kworker/0:2 Not tainted 5.1.0-rc4+ #60
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+0x23/0x4f lib/list_debug.c:45
Code: e8 85 50 29 fe 0f 0b 4c 89 f6 48 c7 c7 80 90 a1 87 e8 74 50 29 fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 c0 8f a1 87 e8 60 50 29 fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 20 90 a1 87 e8 4c 50 29 fe 0f 0b
RSP: 0018:ffff88809e43fc48 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff8880882cdf00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815affc6 RDI: ffffed1013c87f7b
RBP: ffff88809e43fc60 R08: 000000000000004e R09: ffffed1015d05011
R10: ffffed1015d05010 R11: ffff8880ae828087 R12: dead000000000200
R13: dead000000000100 R14: ffff8880882cdfb0 R15: ffff8880882cdfb0
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f11bb8d0000 CR3: 000000006b43c000 CR4: 00000000001426f0
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 p9_read_work+0x9e5/0x1050 net/9p/trans_fd.c:378
 process_one_work+0x98e/0x1790 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x357/0x430 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace c912f7a97aed83d4 ]---
RIP: 0010:__list_del_entry_valid.cold+0x23/0x4f lib/list_debug.c:45
Code: e8 85 50 29 fe 0f 0b 4c 89 f6 48 c7 c7 80 90 a1 87 e8 74 50 29 fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 c0 8f a1 87 e8 60 50 29 fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 20 90 a1 87 e8 4c 50 29 fe 0f 0b
RSP: 0018:ffff88809e43fc48 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff8880882cdf00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815affc6 RDI: ffffed1013c87f7b
RBP: ffff88809e43fc60 R08: 000000000000004e R09: ffffed1015d05011
R10: ffffed1015d05010 R11: ffff8880ae828087 R12: dead000000000200
R13: dead000000000100 R14: ffff8880882cdfb0 R15: ffff8880882cdfb0
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f11bb8d0000 CR3: 000000006b43c000 CR4: 00000000001426f0