------------[ cut here ]------------ proc_dir_entry 'ipt_CLUSTERIP/172.30.0.6' already registered WARNING: CPU: 0 PID: 8610 at fs/proc/generic.c:376 proc_register+0x34c/0x700 fs/proc/generic.c:376 Modules linked in: CPU: 0 PID: 8610 Comm: syz-executor.5 Not tainted 6.0.0-syzkaller-02788-g739cfa34518e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:proc_register+0x34c/0x700 fs/proc/generic.c:376 Code: df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 5d 03 00 00 48 8b 44 24 28 48 c7 c7 a0 ee fe 89 48 8b b0 d8 00 00 00 e8 60 5e 43 07 <0f> 0b 48 c7 c7 e0 cf 16 8c e8 a6 bc 8b 07 48 8b 4c 24 38 48 b8 00 RSP: 0018:ffffc9000655f508 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888020ee1d80 RSI: ffffffff8160f6f8 RDI: fffff52000cabe93 RBP: ffff888025276d38 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff888075c7a998 R13: ffff88806f32be80 R14: dffffc0000000000 R15: 000000000000000a FS: 00007f667caa1700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004e4b42 CR3: 00000000261dd000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: proc_create_data+0x130/0x190 fs/proc/generic.c:578 clusterip_config_init net/ipv4/netfilter/ipt_CLUSTERIP.c:292 [inline] clusterip_tg_check+0x1bd3/0x23a0 net/ipv4/netfilter/ipt_CLUSTERIP.c:517 xt_check_target+0x26c/0x9e0 net/netfilter/x_tables.c:1038 check_target net/ipv4/netfilter/ip_tables.c:512 [inline] find_check_entry.constprop.0+0x7a9/0x9a0 net/ipv4/netfilter/ip_tables.c:554 translate_table+0xc26/0x16a0 net/ipv4/netfilter/ip_tables.c:718 do_replace net/ipv4/netfilter/ip_tables.c:1136 [inline] do_ipt_set_ctl+0x56c/0xb10 net/ipv4/netfilter/ip_tables.c:1630 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0xee/0x100 net/ipv4/ip_sockglue.c:1444 udp_setsockopt+0x76/0xc0 net/ipv4/udp.c:2788 __sys_setsockopt+0x2d6/0x690 net/socket.c:2252 __do_sys_setsockopt net/socket.c:2263 [inline] __se_sys_setsockopt net/socket.c:2260 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2260 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd 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:00007f667caa1188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 0000000000000040 RSI: 8001000000000000 RDI: 0000000000000004 RBP: 00000000004bfcc4 R08: 00000000000002a8 R09: 0000000000000000 R10: 00000000200004c0 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffe183b24cf R14: 00007f667caa1300 R15: 0000000000022000