list_del corruption, ffff8880829ceab0->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: 12 Comm: kworker/0:1 Not tainted 5.4.0-rc5-next-20191029 #0
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 f5 c1 13 fe 0f 0b 4c 89 f6 48 c7 c7 a0 31 e7 87 e8 e4 c1 13 fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 e0 30 e7 87 e8 d0 c1 13 fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 40 31 e7 87 e8 bc c1 13 fe 0f 0b
RSP: 0018:ffff8880a98c7c40 EFLAGS: 00010282
RAX: 000000000000004e RBX: ffff8880829cea00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815d0726 RDI: ffffed1015318f7a
RBP: ffff8880a98c7c58 R08: 000000000000004e R09: ffffed1015d06161
R10: ffffed1015d06160 R11: ffff8880ae830b07 R12: dead000000000122
R13: dead000000000100 R14: ffff8880829ceab0 R15: ffff8880829ceab0
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000075c091 CR3: 0000000008e6d000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:131 [inline]
 list_del include/linux/list.h:139 [inline]
 p9_read_work+0xa35/0x10a0 net/9p/trans_fd.c:363
 process_one_work+0x9af/0x1740 kernel/workqueue.c:2263
 worker_thread+0x98/0xe40 kernel/workqueue.c:2409
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace 90e5a2cfa0227f45 ]---
RIP: 0010:__list_del_entry_valid.cold+0x23/0x4f lib/list_debug.c:45
Code: e8 f5 c1 13 fe 0f 0b 4c 89 f6 48 c7 c7 a0 31 e7 87 e8 e4 c1 13 fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 e0 30 e7 87 e8 d0 c1 13 fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 40 31 e7 87 e8 bc c1 13 fe 0f 0b
RSP: 0018:ffff8880a98c7c40 EFLAGS: 00010282
RAX: 000000000000004e RBX: ffff8880829cea00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815d0726 RDI: ffffed1015318f7a
RBP: ffff8880a98c7c58 R08: 000000000000004e R09: ffffed1015d06161
R10: ffffed1015d06160 R11: ffff8880ae830b07 R12: dead000000000122
R13: dead000000000100 R14: ffff8880829ceab0 R15: ffff8880829ceab0
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000075c091 CR3: 0000000008e6d000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400