x_tables: ip_tables: socket match: used from hooks OUTPUT, but only valid from PREROUTING/INPUT x_tables: ip_tables: socket match: used from hooks OUTPUT, but only valid from PREROUTING/INPUT ------------[ cut here ]------------ proc_dir_entry 'ipt_CLUSTERIP/172.30.0.2' already registered WARNING: CPU: 1 PID: 13861 at fs/proc/generic.c:360 proc_register+0x2c3/0x490 fs/proc/generic.c:359 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 13861 Comm: syz-executor.1 Not tainted 4.20.0-rc2-syzkaller #0 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+0x86/0xca lib/dump_stack.c:113 panic+0x1e7/0x358 kernel/panic.c:188 __warn.cold.7+0x1b/0x3b kernel/panic.c:540 report_bug+0x1a1/0x200 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x11b/0x1c0 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969 RIP: 0010:proc_register+0x2c3/0x490 fs/proc/generic.c:359 Code: 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 c1 01 00 00 49 8b b4 24 c8 00 00 00 48 c7 c7 60 13 f5 87 e8 00 ca 84 ff <0f> 0b 48 c7 c7 20 15 85 89 e8 ef cf d5 05 4c 89 ea 48 b8 00 00 00 RSP: 0018:ffff8880a9c5f638 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffed101446806a RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff88308160 RDI: ffffffff8b7b9960 RBP: ffff8880a9c5f688 R08: ffffed1017468639 R09: ffffed1017468638 R10: ffffed1017468638 R11: ffff8880ba3431c7 R12: ffff8880addaba00 R13: ffff8880a2340304 R14: ffff8880a2340348 R15: ffff8880a2340280 proc_create_data+0x9f/0xf0 fs/proc/generic.c:546 clusterip_config_init net/ipv4/netfilter/ipt_CLUSTERIP.c:285 [inline] clusterip_tg_check+0xee5/0x13e0 net/ipv4/netfilter/ipt_CLUSTERIP.c:506 xt_check_target+0x200/0x640 net/netfilter/x_tables.c:1024 check_target net/ipv4/netfilter/ip_tables.c:514 [inline] find_check_entry.isra.2+0x630/0x8b0 net/ipv4/netfilter/ip_tables.c:556 translate_table+0xc83/0x1af0 net/ipv4/netfilter/ip_tables.c:720 do_replace net/ipv4/netfilter/ip_tables.c:1139 [inline] do_ipt_set_ctl+0x259/0x3e5 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x5c/0xb0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1260 [inline] ip_setsockopt+0x59/0x70 net/ipv4/ip_sockglue.c:1240 udp_setsockopt+0x16/0x30 net/ipv4/udp.c:2649 sock_common_setsockopt+0x73/0xf0 net/core/sock.c:2982 __sys_setsockopt+0x13e/0x210 net/socket.c:1902 __do_sys_setsockopt net/socket.c:1913 [inline] __se_sys_setsockopt net/socket.c:1910 [inline] __x64_sys_setsockopt+0xb9/0x150 net/socket.c:1910 do_syscall_64+0xa3/0x440 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa90e2a7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000040 RSI: 8001000000000000 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 00000000000002a8 R09: 0000000000000000 R10: 00000000200004c0 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd224e70bf R14: 00007fa90e2a7300 R15: 0000000000022000 Kernel Offset: disabled Rebooting in 86400 seconds..