IPVS: set_ctl: invalid protocol: 4 224.0.0.1:20003
list_add corruption. next->prev should be prev (ffff88021fffac50), but was ffff88021fffac48. (next=ffff88021fffac48).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:25!
invalid opcode: 0000 [#1] SMP PTI
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 10618 Comm: syz-executor2 Not tainted 4.17.0+ #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_add_valid+0x275/0x450 lib/list_debug.c:23
RSP: 0018:ffff88011951f228 EFLAGS: 00010086
RAX: 0000000000000075 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 00000000000011ee RDI: 00000000000011ef
RBP: ffff88011951f290 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff86575950 R12: ffff88021fffac48
R13: ffff88021fffac48 R14: 0000000000000000 R15: ffffffff8b58d000
FS:  00007f05b2e1f700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f05b2dfddb8 CR3: 000000011b340000 CR4: 00000000001406e0
DR0: 0000000020abe000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 __list_add include/linux/list.h:60 [inline]
 list_add include/linux/list.h:79 [inline]
 __free_one_page+0x1483/0x1800 mm/page_alloc.c:876
 free_one_page mm/page_alloc.c:1176 [inline]
 __free_pages_ok+0x870/0x1680 mm/page_alloc.c:1260
 __free_pages+0x109/0x240 mm/page_alloc.c:4442
 kmsan_free_page+0x197/0x2e0 mm/kmsan/kmsan.c:959
 free_pages_prepare mm/page_alloc.c:996 [inline]
 __free_pages_ok+0x288/0x1680 mm/page_alloc.c:1254
 __free_pages+0x109/0x240 mm/page_alloc.c:4442
 free_thread_stack kernel/fork.c:267 [inline]
 release_task_stack kernel/fork.c:354 [inline]
 put_task_stack+0x233/0x2f0 kernel/fork.c:365
 finish_task_switch+0x17f/0x270 kernel/sched/core.c:2758
 context_switch kernel/sched/core.c:2883 [inline]
 __schedule+0x66b/0x770 kernel/sched/core.c:3524
 schedule+0x1cc/0x2f0 kernel/sched/core.c:3568
 freezable_schedule include/linux/freezer.h:172 [inline]
 futex_wait_queue_me+0x470/0x710 kernel/futex.c:2530
 futex_wait+0x403/0xc20 kernel/futex.c:2645
 do_futex+0xcac/0x6c20 kernel/futex.c:3527
 __do_sys_futex kernel/futex.c:3587 [inline]
 __se_sys_futex+0x65f/0x860 kernel/futex.c:3555
 __x64_sys_futex+0x1a2/0x200 kernel/futex.c:3555
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x455a99
RSP: 002b:00007f05b2e1ece8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 000000000072bec0 RCX: 0000000000455a99
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000072bec0
RBP: 000000000072bec0 R08: 0000000000000000 R09: 000000000072bea0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000a3e81f R14: 00007f05b2e1f9c0 R15: 0000000000000000
Code: 87 80 0c 00 00 00 00 00 00 41 c7 87 20 03 00 00 00 00 00 00 48 c7 c7 e4 b0 9c 8a 31 c0 48 89 d6 4c 89 ea 4c 89 e1 e8 1b a5 3e fd <0f> 0b 66 0f 1f 84 00 00 00 00 00 eb fe 48 8b 7d c8 e8 b5 9d be 
RIP: __list_add_valid+0x275/0x450 lib/list_debug.c:23 RSP: ffff88011951f228
---[ end trace 912823e8d2ad2779 ]---