list_del corruption, ffff88809391deb0->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: 23457 Comm: kworker/0:1 Not tainted 5.1.0-rc1-next-20190322 #9 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 75 6d 29 fe 0f 0b 4c 89 f6 48 c7 c7 c0 e8 a1 87 e8 64 6d 29 fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 00 e8 a1 87 e8 50 6d 29 fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 60 e8 a1 87 e8 3c 6d 29 fe 0f 0b RSP: 0018:ffff888052dbfc48 EFLAGS: 00010286 RAX: 000000000000004e RBX: ffff88809391de00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815b0316 RDI: ffffed100a5b7f7b RBP: ffff888052dbfc60 R08: 000000000000004e R09: ffff88805373cef0 R10: 0000000000000000 R11: 0000000000000000 R12: dead000000000200 R13: dead000000000100 R14: ffff88809391deb0 R15: ffff88809391deb0 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fc2d000 CR3: 00000000891ae000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 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:2270 worker_thread+0x98/0xe40 kernel/workqueue.c:2416 kthread+0x357/0x430 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: ---[ end trace dc558fe3f2864342 ]--- RIP: 0010:__list_del_entry_valid.cold+0x23/0x4f lib/list_debug.c:45 Code: e8 75 6d 29 fe 0f 0b 4c 89 f6 48 c7 c7 c0 e8 a1 87 e8 64 6d 29 fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 00 e8 a1 87 e8 50 6d 29 fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 60 e8 a1 87 e8 3c 6d 29 fe 0f 0b RSP: 0018:ffff888052dbfc48 EFLAGS: 00010286 RAX: 000000000000004e RBX: ffff88809391de00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815b0316 RDI: ffffed100a5b7f7b RBP: ffff888052dbfc60 R08: 000000000000004e R09: ffff88805373cef0 R10: 0000000000000000 R11: 0000000000000000 R12: dead000000000200 R13: dead000000000100 R14: ffff88809391deb0 R15: ffff88809391deb0 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fc2d000 CR3: 00000000891ae000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600