[    2.573791] veth0: renamed from veth1
[    2.660498] gre: GRE over IPv4 demultiplexer driver
[    2.663433] ip6_gre: GRE over IPv6 tunneling driver
[    2.677574] ip6_tunnel: gre1 xmit: Local address not yet configured!
[    2.706729] ip6_tunnel: gre1 xmit: Local address not yet configured!
[    5.039468] socat (330) used greatest stack depth: 11448 bytes left
[    5.087042] ------------[ cut here ]------------
[    5.087171] refcount_t: underflow; use-after-free.
[    5.087229] WARNING: CPU: 0 PID: 334 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    5.087313] Modules linked in: ip6_gre gre
[    5.087349] CPU: 0 UID: 0 PID: 334 Comm: ip Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    5.087427] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    5.087471] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    5.087511] Code: a2 e8 e8 54 ba ff 90 0f 0b 90 90 c3 80 3d 00 e6 2b 01 00 75 89 c6 05 f7 e5 2b 01 01 90 48 c7 c7 f8 48 b5 a2 e8 c5 54 ba ff 90 <0f> 0b 90 90 c3 80 3d db e5 2b 01 00 0f 85 62 ff ff ff c6 05 ce e5
[    5.087634] RSP: 0018:ffffb79600283730 EFLAGS: 00010282
[    5.087671] RAX: 0000000000000000 RBX: ffffb79600283740 RCX: 00000000ffffdfff
[    5.087742] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    5.087797] RBP: ffffb79600283238 R08: ffffffffa335ba28 R09: 00000000ffffdfff
[    5.087914] R10: ffffffffa327ba40 R11: ffffffffa332ba40 R12: dead000000000122
[    5.087996] R13: 00000000fffb7f75 R14: 0000000000000001 R15: ffff962001bda000
[    5.088065] FS:  00007fe465503800(0000) GS:ffff96209b191000(0000) knlGS:0000000000000000
[    5.088131] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    5.088188] CR2: 0000560797e79148 CR3: 0000000003354005 CR4: 0000000000772ef0
[    5.088249] PKRU: 55555554
[    5.088273] Call Trace:
[    5.088293]  <TASK>
[    5.088310]  netdev_run_todo+0x21a/0x550
[    5.088346]  rtnl_dellink+0x15b/0x350
[    5.088403]  ? virtio_fs_enqueue_req+0x352/0x570
[    5.088454]  ? netdev_run_todo+0x63/0x550
[    5.088481]  ? rtnl_bridge_getlink+0x1a0/0x1a0
[    5.088538]  rtnetlink_rcv_msg+0x358/0x400
[    5.088575]  ? get_page_from_freelist+0x15b4/0x1770
[    5.088622]  ? rtnl_calcit.isra.0+0x110/0x110
[    5.088662]  netlink_rcv_skb+0x57/0x100
[    5.088704]  netlink_unicast+0x252/0x380
[    5.088738]  ? __alloc_skb+0xdb/0x190
[    5.088770]  netlink_sendmsg+0x1be/0x3e0
[    5.088803]  ____sys_sendmsg+0x132/0x260
[    5.088839]  ? copy_msghdr_from_user+0x6c/0xa0
[    5.088879]  ___sys_sendmsg+0x87/0xd0
[    5.088911]  ? do_wp_page+0x369/0xe90
[    5.088960]  ? ___pte_offset_map+0x1b/0xd0
[    5.089005]  ? nfulnl_rcv_nl_event+0x36/0xa0
[    5.089051]  ? fsnotify_grab_connector+0x48/0x80
[    5.089102]  ? fsnotify_destroy_marks+0x29/0x150
[    5.089141]  __sys_sendmsg+0x71/0xd0
[    5.089175]  do_syscall_64+0xa4/0xfd0
[    5.089216]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    5.089254] RIP: 0033:0x7fe4656d11d7
[    5.089293] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
[    5.089423] RSP: 002b:00007ffe3113f4b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[    5.089482] RAX: ffffffffffffffda RBX: 00007ffe3113fbe0 RCX: 00007fe4656d11d7
[    5.089538] RDX: 0000000000000000 RSI: 00007ffe3113f520 RDI: 0000000000000005
[    5.089595] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[    5.089658] R10: 00007fe4655cdf60 R11: 0000000000000246 R12: 0000000000000002
[    5.089730] R13: 00000000690deaa9 R14: 0000000000499600 R15: 0000000000000000
[    5.089811]  </TASK>
[    5.089839] ---[ end trace 0000000000000000 ]---