list_del corruption, ffff88808da6a1b0->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: 14753 Comm: kworker/0:5 Not tainted 5.1.0-rc4-next-20190410 #22
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 b1 26 fe 0f 0b 4c 89 f6 48 c7 c7 80 27 a2 87 e8 74 b1 26 fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 c0 26 a2 87 e8 60 b1 26 fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 20 27 a2 87 e8 4c b1 26 fe 0f 0b
RSP: 0018:ffff888060d97c48 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff88808da6a100 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815af7a6 RDI: ffffed100c1b2f7b
RBP: ffff888060d97c60 R08: 000000000000004e R09: ffffed1015d05019
R10: ffffed1015d05018 R11: ffff8880ae8280c7 R12: dead000000000200
R13: dead000000000100 R14: ffff88808da6a1b0 R15: ffff88808da6a1b0
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc6a9a6fc8 CR3: 000000008ee2b000 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:2274
 worker_thread+0x98/0xe40 kernel/workqueue.c:2420
 kthread+0x357/0x430 kernel/kthread.c:254
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace 2a434e7ecf933e37 ]---
RIP: 0010:__list_del_entry_valid.cold+0x23/0x4f lib/list_debug.c:45
Code: e8 85 b1 26 fe 0f 0b 4c 89 f6 48 c7 c7 80 27 a2 87 e8 74 b1 26 fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 c0 26 a2 87 e8 60 b1 26 fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 20 27 a2 87 e8 4c b1 26 fe 0f 0b
RSP: 0018:ffff888060d97c48 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff88808da6a100 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815af7a6 RDI: ffffed100c1b2f7b
RBP: ffff888060d97c60 R08: 000000000000004e R09: ffffed1015d05019
R10: ffffed1015d05018 R11: ffff8880ae8280c7 R12: dead000000000200
R13: dead000000000100 R14: ffff88808da6a1b0 R15: ffff88808da6a1b0
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc6a9a6fc8 CR3: 000000008ee2b000 CR4: 00000000001426f0