------------[ cut here ]------------
WARNING: CPU: 0 PID: 5825 at net/core/dev.c:9593 dev_index_reserve+0x1a2/0x1c0 net/core/dev.c:9593
Modules linked in:
CPU: 0 PID: 5825 Comm: syz-executor.2 Not tainted 6.5.0-rc5-syzkaller-01605-g950fe35831af #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 f2 05 02 02 4c 89 e7 89 c3 e8 48 01 11 02 e9 48 ff ff ff e8 5e 1a 5e f9 <0f> 0b bb ea ff ff ff e9 52 ff ff ff e8 cd 4f 0d 02 66 66 2e 0f 1f
RSP: 0018:ffffc90004f2f168 EFLAGS: 00010283
RAX: 000000000000521c RBX: 00000000ffffffff RCX: ffffc9000c452000
RDX: 0000000000040000 RSI: ffffffff88280632 RDI: 0000000000000005
RBP: 1ffff920009e5e2d R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000094000 R12: ffff88807883a010
R13: ffff88802351ba80 R14: ffff88807883a000 R15: ffff88807883a0f8
FS:  00007f2dafe196c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f522000 CR3: 0000000077fde000 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
 ip_tunnel_newlink+0x2dc/0x790 net/ipv4/ip_tunnel.c:1172
 ipgre_newlink+0x14c/0x160 net/ipv4/ip_gre.c:1366
 rtnl_newlink_create net/core/rtnetlink.c:3471 [inline]
 __rtnl_newlink+0x115e/0x18c0 net/core/rtnetlink.c:3688
 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3701
 rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6427
 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:728 [inline]
 sock_sendmsg+0xd9/0x180 net/socket.c:751
 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2514
 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2568
 __sys_sendmsg+0x117/0x1e0 net/socket.c:2597
 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: 0033:0x7f2daf07cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2dafe190c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f2daf19c120 RCX: 00007f2daf07cae9
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000007
RBP: 00007f2daf0c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f2daf19c120 R15: 00007ffe1ac557d8
 </TASK>