list_del corruption, ffffea00017d8dc8->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: 23996 Comm: kworker/0:4 Not tainted 5.1.0+ #8
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events cache_reap
RIP: 0010:__list_del_entry_valid.cold+0x23/0x4f lib/list_debug.c:45
Code: e8 25 71 25 fe 0f 0b 4c 89 f6 48 c7 c7 c0 4b a3 87 e8 14 71 25 fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 00 4b a3 87 e8 00 71 25 fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 60 4b a3 87 e8 ec 70 25 fe 0f 0b
RSP: 0018:ffff8880897c7bd8 EFLAGS: 00010086
RAX: 000000000000004e RBX: ffffe8ffffc6cc10 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815afbe6 RDI: ffffed10112f8f6d
RBP: ffff8880897c7bf0 R08: 000000000000004e R09: ffffed1015d06011
R10: ffffed1015d06010 R11: ffff8880ae830087 R12: dead000000000200
R13: dead000000000100 R14: ffffea00017d8dc8 R15: ffffea00017d8dc8
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f63df814518 CR3: 000000009919d000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 free_block+0xd8/0x250 mm/slab.c:3380
 drain_array_locked+0x36/0x90 mm/slab.c:2165
 drain_array+0x8c/0xb0 mm/slab.c:3990
 cache_reap+0xf4/0x280 mm/slab.c:4031
 process_one_work+0x98e/0x1790 kernel/workqueue.c:2268
 worker_thread+0x98/0xe40 kernel/workqueue.c:2414
 kthread+0x357/0x430 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace f8b27d420d1bc8f5 ]---
RIP: 0010:__list_del_entry_valid.cold+0x23/0x4f lib/list_debug.c:45
Code: e8 25 71 25 fe 0f 0b 4c 89 f6 48 c7 c7 c0 4b a3 87 e8 14 71 25 fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 00 4b a3 87 e8 00 71 25 fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 60 4b a3 87 e8 ec 70 25 fe 0f 0b
RSP: 0018:ffff8880897c7bd8 EFLAGS: 00010086
RAX: 000000000000004e RBX: ffffe8ffffc6cc10 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815afbe6 RDI: ffffed10112f8f6d
RBP: ffff8880897c7bf0 R08: 000000000000004e R09: ffffed1015d06011
R10: ffffed1015d06010 R11: ffff8880ae830087 R12: dead000000000200
R13: dead000000000100 R14: ffffea00017d8dc8 R15: ffffea00017d8dc8
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f63df814518 CR3: 000000009919d000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400