WARNING: CPU: 0 PID: 5268 at fs/proc/generic.c:330 proc_register+0x2a4/0x370 fs/proc/generic.c:329
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 5268 Comm: syzkaller931218 Not tainted 4.15.0+ #221
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1097
RIP: 0010:proc_register+0x2a4/0x370 fs/proc/generic.c:329
RSP: 0018:ffff8801cd137528 EFLAGS: 00010286
RAX: dffffc0000000008 RBX: ffff8801d21d4178 RCX: ffffffff815a57ae
RDX: 0000000000000000 RSI: 1ffff10039a26e55 RDI: 1ffff10039a26e2a
RBP: ffff8801cd137578 R08: 1ffff10039a26dec R09: 0000000000000000
R10: ffff8801cd1373e0 R11: 0000000000000000 R12: ffff8801b3907480
R13: dffffc0000000000 R14: ffff8801cfba8188 R15: ffff8801b3907541
 proc_create_data+0xf8/0x180 fs/proc/generic.c:494
 clusterip_config_init net/ipv4/netfilter/ipt_CLUSTERIP.c:250 [inline]
 clusterip_tg_check+0xf9c/0x16d0 net/ipv4/netfilter/ipt_CLUSTERIP.c:488
 xt_check_target+0x22c/0x7d0 net/netfilter/x_tables.c:850
 check_target net/ipv4/netfilter/ip_tables.c:513 [inline]
 find_check_entry.isra.8+0x8c8/0xcb0 net/ipv4/netfilter/ip_tables.c:554
 translate_table+0xed1/0x1610 net/ipv4/netfilter/ip_tables.c:725
 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
 do_ipt_set_ctl+0x370/0x5f0 net/ipv4/netfilter/ip_tables.c:1675
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115
 ip_setsockopt+0x97/0xa0 net/ipv4/ip_sockglue.c:1259
 raw_setsockopt+0xb7/0xd0 net/ipv4/raw.c:870
 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975
 SYSC_setsockopt net/socket.c:1849 [inline]
 SyS_setsockopt+0x189/0x360 net/socket.c:1828
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x44b879
RSP: 002b:00007f41d368ad48 EFLAGS: 00000202 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00000000006ddc38 RCX: 000000000044b879
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00000000006ddc3c R08: 0000000000000368 R09: 0000000000005a1e
R10: 00000000204a0c98 R11: 0000000000000202 R12: 0000000000000000
R13: 00007fffa01886af R14: 00007f41d368b9c0 R15: 0000000000000004
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..