------------[ cut here ]------------
WARNING: CPU: 1 PID: 10112 at net/core/dev.c:10876 unregister_netdevice_many_notify+0x14d8/0x19a0 net/core/dev.c:10876
Modules linked in:
CPU: 1 PID: 10112 Comm: kworker/u4:8 Not tainted 6.5.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: netns cleanup_net
RIP: 0010:unregister_netdevice_many_notify+0x14d8/0x19a0 net/core/dev.c:10876
Code: b4 1a 00 00 48 c7 c6 e0 34 81 8b 48 c7 c7 20 35 81 8b c6 05 5e 20 6c 06 01 e8 64 16 23 f9 0f 0b e9 64 f7 ff ff e8 18 54 5c f9 <0f> 0b e9 3b f7 ff ff e8 ec 60 b0 f9 e9 fc ec ff ff 4c 89 e7 e8 3f
RSP: 0018:ffffc900035afa30 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000076e02501 RCX: 0000000000000000
RDX: ffff8880327cbb80 RSI: ffffffff8829b488 RDI: 0000000000000001
RBP: ffff88802c0a8000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 000000000000004e R12: ffff888017300280
R13: 0000000000000000 R14: 0000000000000002 R15: ffff888017300280
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff0dfb78038 CR3: 000000000c776000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ip6_tnl_exit_batch_net+0x57d/0x6f0 net/ipv6/ip6_tunnel.c:2278
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175
 cleanup_net+0x505/0xb20 net/core/net_namespace.c:614
 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600
 worker_thread+0x687/0x1110 kernel/workqueue.c:2751
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>