list_del corruption, ffffea00018d1508->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: 32607 Comm: kworker/0:0 Not tainted 5.2.0-rc3+ #20 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 f5 37 25 fe 0f 0b 4c 89 f6 48 c7 c7 00 c3 a4 87 e8 e4 37 25 fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 40 c2 a4 87 e8 d0 37 25 fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 a0 c2 a4 87 e8 bc 37 25 fe 0f 0b RSP: 0018:ffff88806d3efbd8 EFLAGS: 00010086 RAX: 000000000000004e RBX: ffffe8ffffc320a8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815ac936 RDI: ffffed100da7df6d RBP: ffff88806d3efbf0 R08: 000000000000004e R09: ffffed1015d06019 R10: ffffed1015d06018 R11: ffff8880ae8300c7 R12: dead000000000200 R13: dead000000000100 R14: ffffea00018d1508 R15: ffffea00018d1508 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004e7720 CR3: 00000000623b9000 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: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: ======================================================