IPVS: ftp: loaded support on port[0] = 21
WARNING: CPU: 1 PID: 4497 at ./include/net/sock.h:639 sk_del_node_init include/net/sock.h:639 [inline]
WARNING: CPU: 1 PID: 4497 at ./include/net/sock.h:639 smc_unhash_sk+0x345/0x4a0 net/smc/af_smc.c:91
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 4497 Comm: syz-executor0 Not tainted 4.16.0+ #6
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
 panic+0x22f/0x4de kernel/panic.c:184
 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:991
RIP: 0010:sk_del_node_init include/net/sock.h:639 [inline]
RIP: 0010:smc_unhash_sk+0x345/0x4a0 net/smc/af_smc.c:91
RSP: 0018:ffff8801d9f8f010 EFLAGS: 00010293
RAX: ffff8801ac66a2c0 RBX: ffff8801cff0b7c0 RCX: ffffffff871ea53e
RDX: 0000000000000000 RSI: ffffffff871ea5f5 RDI: 0000000000000005
RBP: ffff8801d9f8f0f8 R08: ffff8801ac66a2c0 R09: ffffed0039fe1708
R10: ffffed0039fe1708 R11: ffff8801cff0b843 R12: 1ffff1003b3f1e06
R13: ffff8801d9f8f0d0 R14: ffffffff894dd740 R15: ffff8801cff0b840
 smc_release+0x36e/0x610 net/smc/af_smc.c:161
 sock_release+0x96/0x1b0 net/socket.c:594
 sock_close+0x16/0x20 net/socket.c:1149
 __fput+0x34d/0x890 fs/file_table.c:209
 ____fput+0x15/0x20 fs/file_table.c:243
 task_work_run+0x1e4/0x290 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x1aee/0x2730 kernel/exit.c:865
 do_group_exit+0x16f/0x430 kernel/exit.c:968
 get_signal+0x886/0x1960 kernel/signal.c:2469
 do_signal+0x98/0x2040 arch/x86/kernel/signal.c:810
 exit_to_usermode_loop+0x28a/0x310 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:265 [inline]
 do_syscall_64+0x792/0x9d0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x455329
RSP: 002b:00007ffd92cae468 EFLAGS: 00000246 ORIG_RAX: 0000000000000007
RAX: 0000000000000001 RBX: 000000000102a914 RCX: 0000000000455329
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000020000100
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000462 R14: 00000000006f99d0 R15: 0000000000007a75
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..