------------[ cut here ]------------
WARNING: CPU: 0 PID: 5632 at net/ipv6/ip6mr.c:419 ip6mr_free_table+0xd8/0x100 net/ipv6/ip6mr.c:419
Modules linked in:
CPU: 0 UID: 0 PID: 5632 Comm: syz-executor Not tainted 6.13.0-rc1-syzkaller-00005-gceb8bf2ceaa7 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ip6mr_free_table+0xd8/0x100 net/ipv6/ip6mr.c:419
Code: e8 9d 2f ff ff 49 8d be 98 0e 00 00 31 f6 31 d2 e8 cd e0 45 fa 4c 89 f7 5b 41 5c 41 5e 41 5f e9 de c3 79 f7 e8 b9 23 1b f7 90 <0f> 0b 90 eb c0 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 72 ff ff ff 48
RSP: 0018:ffffc90002d8faf8 EFLAGS: 00010293
RAX: ffffffff8a844e67 RBX: 0000000000000001 RCX: ffff888000ec2440
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff8a844dfa R09: 1ffff1100800b028
R10: dffffc0000000000 R11: ffffed100800b029 R12: dffffc0000000000
R13: dead000000000122 R14: ffff888034724000 R15: ffff888040058ec0
FS:  0000555588060500(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8b506756c0 CR3: 0000000053d54000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ip6mr_rules_exit+0x18f/0x220 net/ipv6/ip6mr.c:283
 ip6mr_net_exit_batch+0x4a/0x90 net/ipv6/ip6mr.c:1388
 ops_exit_list net/core/net_namespace.c:177 [inline]
 setup_net+0x829/0x9e0 net/core/net_namespace.c:394
 copy_net_ns+0x33f/0x570 net/core/net_namespace.c:500
 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228
 ksys_unshare+0x57d/0xa70 kernel/fork.c:3334
 __do_sys_unshare kernel/fork.c:3405 [inline]
 __se_sys_unshare kernel/fork.c:3403 [inline]
 __x64_sys_unshare+0x38/0x40 kernel/fork.c:3403
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1414f81717
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdb21de0f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1414f81717
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00007ffdb21de160 R08: 00007f1415c77d60 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffdb21de160
R13: 00007ffdb21de168 R14: 0000000000000009 R15: 0000000000000000
 </TASK>