------------[ cut here ]------------ proc_dir_entry 'ipt_CLUSTERIP/172.30.0.1' already registered WARNING: CPU: 1 PID: 4353 at fs/proc/generic.c:376 proc_register+0x350/0x700 fs/proc/generic.c:376 Modules linked in: CPU: 1 PID: 4353 Comm: syz-executor.0 Not tainted 6.2.0-rc3-syzkaller-00261-gfdfc76a116b5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0010:proc_register+0x350/0x700 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 74 5e 8a 48 8b b0 d8 00 00 00 e8 a0 af bc 07 <0f> 0b 48 c7 c7 00 1d 98 8c e8 f2 bf 06 08 48 8b 4c 24 38 48 b8 00 RSP: 0018:ffffc9000bce7508 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff8880774eba80 RSI: ffffffff8166724c RDI: fffff5200179ce93 RBP: ffff88802a14a478 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880209e70d8 R13: ffff888023702ac0 R14: dffffc0000000000 R15: 000000000000000a FS: 00007fd8058c4700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004e4b45 CR3: 000000007da8f000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: proc_create_data+0x134/0x1a0 fs/proc/generic.c:578 clusterip_config_init net/ipv4/netfilter/ipt_CLUSTERIP.c:292 [inline] clusterip_tg_check+0x1bdb/0x23b0 net/ipv4/netfilter/ipt_CLUSTERIP.c:517 xt_check_target+0x270/0x9e0 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+0x578/0xb10 net/ipv4/netfilter/ip_tables.c:1630 nf_setsockopt+0x87/0xe0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0xf2/0x110 net/ipv4/ip_sockglue.c:1445 udp_setsockopt+0x84/0xd0 net/ipv4/udp.c:2820 __sys_setsockopt+0x2c6/0x5b0 net/socket.c:2246 __do_sys_setsockopt net/socket.c:2257 [inline] __se_sys_setsockopt net/socket.c:2254 [inline] __x64_sys_setsockopt+0xbe/0x160 net/socket.c:2254 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 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:00007fd8058c4188 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: 00007ffc271cd63f R14: 00007fd8058c4300 R15: 0000000000022000