------------[ cut here ]------------ proc_dir_entry 'ipt_CLUSTERIP/224.0.0.1' already registered WARNING: CPU: 0 PID: 4198 at fs/proc/generic.c:376 proc_register+0x34c/0x700 fs/proc/generic.c:376 Modules linked in: CPU: 0 PID: 4198 Comm: syz-executor.0 Not tainted 5.19.0-rc4-syzkaller-00807-gd0bf1fe6454e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 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 e0 cf de 89 48 8b b0 d8 00 00 00 e8 d3 95 32 07 <0f> 0b 48 c7 c7 20 23 f7 8b e8 76 a4 7a 07 48 8b 4c 24 38 48 b8 00 RSP: 0018:ffffc90014bf7268 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff8160d458 RDI: fffff5200297ee3f RBP: ffff88807e2826f8 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880291afd58 R13: ffff8880764f1340 R14: dffffc0000000000 R15: 0000000000000009 FS: 00007fbbc1df1700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020129000 CR3: 0000000077eee000 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+0x56e/0xb80 net/ipv4/netfilter/ip_tables.c:1630 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x3c3/0x3ab0 net/ipv4/ip_sockglue.c:1444 tcp_setsockopt+0x136/0x2520 net/ipv4/tcp.c:3696 __sys_setsockopt+0x2db/0x6a0 net/socket.c:2251 __do_sys_setsockopt net/socket.c:2262 [inline] __se_sys_setsockopt net/socket.c:2259 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2259 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+0x46/0xb0 RIP: 0033:0x7fbbc0c89109 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbbc1df1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fbbc0d9c030 RCX: 00007fbbc0c89109 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000004 RBP: 00007fbbc0ce305d R08: 0000000000000298 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc8045ebef R14: 00007fbbc1df1300 R15: 0000000000022000