------------[ cut here ]------------
proc_dir_entry 'ipt_CLUSTERIP/224.0.0.1' already registered
WARNING: CPU: 0 PID: 8217 at fs/proc/generic.c:376 proc_register+0x34c/0x700 fs/proc/generic.c:376
Modules linked in:
CPU: 0 PID: 8217 Comm: syz-executor.1 Not tainted 5.15.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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 20 af 9c 89 48 8b b0 d8 00 00 00 e8 a0 08 01 07 <0f> 0b 48 c7 c7 40 8f b4 8b e8 f6 65 46 07 48 8b 4c 24 38 48 b8 00
RSP: 0018:ffffc90017657268 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff815daf18 RDI: fffff52002ecae3f
RBP: ffff88806d389ab8 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815d4cbe R11: 0000000000000000 R12: ffff8880acc1dc18
R13: ffff8880acc1d840 R14: dffffc0000000000 R15: 0000000000000009
FS:  00007f96192d8700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000007cae1000 CR4: 00000000003506f0
Call Trace:
 proc_create_data+0x130/0x190 fs/proc/generic.c:575
 clusterip_config_init net/ipv4/netfilter/ipt_CLUSTERIP.c:292 [inline]
 clusterip_tg_check+0x1b83/0x2300 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:511 [inline]
 find_check_entry.constprop.0+0x7a9/0x9a0 net/ipv4/netfilter/ip_tables.c:553
 translate_table+0xc26/0x16a0 net/ipv4/netfilter/ip_tables.c:717
 do_replace net/ipv4/netfilter/ip_tables.c:1135 [inline]
 do_ipt_set_ctl+0x56e/0xb80 net/ipv4/netfilter/ip_tables.c:1629
 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101
 ip_setsockopt+0x3c3/0x3a60 net/ipv4/ip_sockglue.c:1435
 tcp_setsockopt+0x136/0x2530 net/ipv4/tcp.c:3658
 __sys_setsockopt+0x2db/0x610 net/socket.c:2176
 __do_sys_setsockopt net/socket.c:2187 [inline]
 __se_sys_setsockopt net/socket.c:2184 [inline]
 __x64_sys_setsockopt+0xba/0x150 net/socket.c:2184
 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+0x44/0xae
RIP: 0033:0x7f961bd828d9
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:00007f96192d8188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f961be87020 RCX: 00007f961bd828d9
RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000007
RBP: 00007f961bddccb4 R08: 0000000000000298 R09: 0000000000000000
R10: 00000000200002c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f961c3bab2f R14: 00007f96192d8300 R15: 0000000000022000