lo speed is unknown, defaulting to 1000
lo speed is unknown, defaulting to 1000
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8410 at ./include/net/netdev_lock.h:17 netdev_assert_locked include/net/netdev_lock.h:17 [inline]
WARNING: CPU: 0 PID: 8410 at ./include/net/netdev_lock.h:17 netdev_nl_dev_fill+0x6bc/0x860 net/core/netdev-genl.c:41
Modules linked in:
CPU: 0 UID: 0 PID: 8410 Comm: syz.0.663 Not tainted 6.15.0-rc2-syzkaller-00563-g240ce924d271 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:netdev_assert_locked include/net/netdev_lock.h:17 [inline]
RIP: 0010:netdev_nl_dev_fill+0x6bc/0x860 net/core/netdev-genl.c:41
Code: 1c 24 44 29 eb 4c 89 e8 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 4a 01 00 00 41 89 5d 00 31 c0 e9 4d fe ff ff e8 65 4e c4 f7 90 <0f> 0b 90 e9 2c fa ff ff e8 57 4e c4 f7 90 0f 0b 90 42 80 3c 3b 00
RSP: 0018:ffffc900040f7500 EFLAGS: 00010293
RAX: ffffffff89fe6c5b RBX: 0000000000000000 RCX: ffff88802e413c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900040f7630 R08: ffffffff89fe667c R09: 1ffff1100b3511dc
R10: dffffc0000000000 R11: ffffed100b3511dd R12: ffff888064d00000
R13: ffff888030e0f000 R14: ffff888030e0f000 R15: ffffc900040f7680
FS:  00007f19062336c0(0000) GS:ffff888124fab000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa91aae56c0 CR3: 000000007b52a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 netdev_genl_dev_notify+0x1fb/0x450 net/core/netdev-genl.c:102
 netdev_genl_netdevice_event+0x81/0xa0 net/core/netdev-genl.c:-1
 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2266 [inline]
 call_netdevice_notifiers net/core/dev.c:2280 [inline]
 register_netdevice+0x16c0/0x1b80 net/core/dev.c:11102
 __ip_tunnel_create+0x3f0/0x560 net/ipv4/ip_tunnel.c:268
 ip_tunnel_init_net+0x2b7/0x810 net/ipv4/ip_tunnel.c:1161
 ops_init+0x349/0x5b0 net/core/net_namespace.c:138
 setup_net+0x222/0x540 net/core/net_namespace.c:440
 copy_net_ns+0x33f/0x570 net/core/net_namespace.c:572
 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228
 ksys_unshare+0x5e2/0xad0 kernel/fork.c:3375
 __do_sys_unshare kernel/fork.c:3446 [inline]
 __se_sys_unshare kernel/fork.c:3444 [inline]
 __x64_sys_unshare+0x38/0x40 kernel/fork.c:3444
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f190538e169
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1906233038 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f19055b5fa0 RCX: 00007f190538e169
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000042000000
RBP: 00007f1905410a68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f19055b5fa0 R15: 00007ffc50d4eba8
 </TASK>