list_del corruption. prev->next should be ffffea0001880648, but was ffffea0001979608
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:51!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 32019 Comm: kworker/0:9 Not tainted 5.2.0-rc2+ #19
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+0xf/0x4f lib/list_debug.c:51
Code: e8 89 43 25 fe 0f 0b 48 89 f1 48 c7 c7 40 bc a4 87 4c 89 e6 e8 75 43 25 fe 0f 0b 4c 89 f6 48 c7 c7 e0 bd a4 87 e8 64 43 25 fe <0f> 0b 4c 89 ea 4c 89 f6 48 c7 c7 20 bd a4 87 e8 50 43 25 fe 0f 0b
RSP: 0018:ffff888064337bd8 EFLAGS: 00010086
RAX: 0000000000000054 RBX: ffffe8ffffc662f0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815ac7e6 RDI: ffffed100c866f6d
RBP: ffff888064337bf0 R08: 0000000000000054 R09: ffffed1015d06019
R10: ffffed1015d06018 R11: ffff8880ae8300c7 R12: ffffea0001880608
R13: ffffea0001880688 R14: ffffea0001880648 R15: ffffea0001880648
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000046e880 CR3: 000000006732c000 CR4: 00000000001406f0
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:3350
 drain_array_locked+0x36/0x90 mm/slab.c:2142
 drain_array+0x8c/0xb0 mm/slab.c:3960
 cache_reap+0xf4/0x280 mm/slab.c:4001
 process_one_work+0x989/0x1790 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x354/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:

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