x_tables: ip_tables: osf match: only valid for protocol 6 ------------[ cut here ]------------ proc_dir_entry 'ipt_CLUSTERIP/172.20.0.170' already registered WARNING: CPU: 0 PID: 4198 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: 4198 Comm: syzkaller094041 Not tainted 4.15.0+ #299 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:984 RIP: 0010:proc_register+0x2a4/0x370 fs/proc/generic.c:329 RSP: 0018:ffff8801d0956cd8 EFLAGS: 00010286 RAX: dffffc0000000008 RBX: ffff8801d21c9bb8 RCX: ffffffff815a585e RDX: 0000000000000000 RSI: 1ffff1003a12ad4b RDI: 1ffff1003a12ad20 RBP: ffff8801d0956d28 R08: 1ffff1003a12ace2 R09: 0000000000000000 R10: ffff8801d0956b90 R11: 0000000000000000 R12: ffff8801b859d580 R13: dffffc0000000000 R14: ffff8801ad456848 R15: ffff8801b859d641 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 sctp_setsockopt+0x2b6/0x61d0 net/sctp/socket.c:4104 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 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x26/0x9b RIP: 0033:0x446839 RSP: 002b:00007f2fd1382db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc3c RCX: 0000000000446839 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 00000000006dbc38 R08: 0000000000000348 R09: 0000000000000000 R10: 0000000020013c90 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff6b169aaf R14: 00007f2fd13839c0 R15: 0000000000000003 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..