------------[ cut here ]------------
WARNING: CPU: 0 PID: 5039 at net/core/dev.c:9593 dev_index_reserve+0x1a2/0x1c0 net/core/dev.c:9593
Modules linked in:
CPU: 0 PID: 5039 Comm: syz-executor263 Not tainted 6.5.0-rc7-next-20230821-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:dev_index_reserve+0x1a2/0x1c0 net/core/dev.c:9593
Code: 00 31 d2 4d 8d 45 50 b9 ff ff ff 7f 48 8d 74 24 20 e8 d2 45 02 02 4c 89 e7 89 c3 e8 f8 44 11 02 e9 48 ff ff ff e8 2e b1 58 f9 <0f> 0b bb ea ff ff ff e9 52 ff ff ff e8 1d 8d 0d 02 66 66 2e 0f 1f
RSP: 0018:ffffc90003de7200 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 00000000be996da9 RCX: 0000000000000000
RDX: ffff888024ef8000 RSI: ffffffff882f2302 RDI: 0000000000000005
RBP: 1ffff920007bce40 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000be996da9 R11: ffffffff8a60008b R12: ffff888020d58010
R13: ffffffff925ff500 R14: ffff888020d58000 R15: ffff888020d580f8
FS:  0000555555f42380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000072487000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 register_netdevice+0x69a/0x1490 net/core/dev.c:10081
 ipip6_tunnel_create+0x123/0x1c0 net/ipv6/sit.c:215
 ipip6_newlink+0x179/0x3c0 net/ipv6/sit.c:1578
 rtnl_newlink_create net/core/rtnetlink.c:3485 [inline]
 __rtnl_newlink+0x115e/0x18c0 net/core/rtnetlink.c:3702
 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3715
 rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6441
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545
 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]
 netlink_unicast+0x536/0x810 net/netlink/af_netlink.c:1368
 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910
 sock_sendmsg_nosec net/socket.c:730 [inline]
 sock_sendmsg+0xd9/0x180 net/socket.c:753
 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2540
 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2594
 __sys_sendmsg+0x117/0x1e0 net/socket.c:2623
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f72b670c5e9
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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:00007ffe3d966a68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ffe3d966c38 RCX: 00007f72b670c5e9
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007f72b677f610 R08: 000000000000000c R09: 00007ffe3d966c38
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe3d966c28 R14: 0000000000000001 R15: 0000000000000001
 </TASK>