list_del corruption, ffffea0001b10648->next is LIST_POISON1 (dead000000000100) sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:632 ___sys_sendmsg+0x806/0x930 net/socket.c:2137 ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:45! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 3470 Comm: kworker/1:3 Not tainted 5.0.0-rc7+ #95 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 __sys_sendmsg+0x105/0x1d0 net/socket.c:2175 Workqueue: events cache_reap RIP: 0010:__list_del_entry_valid.cold+0x23/0x4f lib/list_debug.c:45 Code: e8 35 dc 2e fe 0f 0b 4c 89 f6 48 c7 c7 a0 53 a2 87 e8 24 dc 2e fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 e0 52 a2 87 e8 10 dc 2e fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 40 53 a2 87 e8 fc db 2e fe 0f 0b RSP: 0018:ffff88809b567bd8 EFLAGS: 00010086 RAX: 000000000000004e RBX: ffffe8ffffd7fc88 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815a99a6 RDI: ffffed10136acf6d RBP: ffff88809b567bf0 R08: 000000000000004e R09: ffffed1015d25021 R10: ffffed1015d25020 R11: ffff8880ae928107 R12: dead000000000200 __do_sys_sendmsg net/socket.c:2184 [inline] __se_sys_sendmsg net/socket.c:2182 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2182 R13: dead000000000100 R14: ffffea0001b10648 R15: ffffea0001b10648 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 entry_SYSCALL_64_after_hwframe+0x49/0xbe CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 RIP: 0033:0x457e29 CR2: 0000000000a50489 CR3: 00000000a53d1000 CR4: 00000000001406e0 Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 RSP: 002b:00007f5df23b6c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 RAX: ffffffffffffffda RBX: 00007f5df23b6c90 RCX: 0000000000457e29 Call Trace: RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000004 __list_del_entry include/linux/list.h:117 [inline] list_del include/linux/list.h:125 [inline] free_block+0xd8/0x250 mm/slab.c:3412 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5df23b76d4 drain_array_locked+0x36/0x90 mm/slab.c:2197 R13: 00000000004c5424 R14: 00000000004d92a8 R15: 0000000000000005 drain_array+0x8c/0xb0 mm/slab.c:4016 cache_reap+0xf4/0x280 mm/slab.c:4057 process_one_work+0x98e/0x1790 kernel/workqueue.c:2173 worker_thread+0x98/0xe40 kernel/workqueue.c:2319 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: ---[ end trace d2a0ad39ae0eb497 ]--- RIP: 0010:__list_del_entry_valid.cold+0x23/0x4f lib/list_debug.c:45 Code: e8 35 dc 2e fe 0f 0b 4c 89 f6 48 c7 c7 a0 53 a2 87 e8 24 dc 2e fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 e0 52 a2 87 e8 10 dc 2e fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 40 53 a2 87 e8 fc db 2e fe 0f 0b RSP: 0018:ffff88809b567bd8 EFLAGS: 00010086 RAX: 000000000000004e RBX: ffffe8ffffd7fc88 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815a99a6 RDI: ffffed10136acf6d RBP: ffff88809b567bf0 R08: 000000000000004e R09: ffffed1015d25021 R10: ffffed1015d25020 R11: ffff8880ae928107 R12: dead000000000200 R13: dead000000000100 R14: ffffea0001b10648 R15: ffffea0001b10648 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000a50489 CR3: 00000000a53d1000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400