[    2.469934] ip (248) used greatest stack depth: 12136 bytes left
[    2.678405] ip (263) used greatest stack depth: 12072 bytes left
[    3.129541] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[    3.207674] br0: port 1(c1) entered blocking state
[    3.207788] br0: port 1(c1) entered disabled state
[    3.207884] c1: entered allmulticast mode
[    3.207982] c1: entered promiscuous mode
[    3.266564] br0: port 2(c2) entered blocking state
[    3.266653] br0: port 2(c2) entered disabled state
[    3.266730] c2: entered allmulticast mode
[    3.266819] c2: entered promiscuous mode
[    3.326520] br0: port 3(c3) entered blocking state
[    3.326630] br0: port 3(c3) entered disabled state
[    3.326726] c3: entered allmulticast mode
[    3.326832] c3: entered promiscuous mode
[    3.388402] br0: port 4(sender) entered blocking state
[    3.388478] br0: port 4(sender) entered disabled state
[    3.388547] sender: entered allmulticast mode
[    3.388683] sender: entered promiscuous mode
[    3.411437] br0: port 4(sender) entered blocking state
[    3.411524] br0: port 4(sender) entered forwarding state
[    3.411586] br0: port 3(c3) entered blocking state
[    3.411656] br0: port 3(c3) entered forwarding state
[    3.411726] br0: port 2(c2) entered blocking state
[    3.411791] br0: port 2(c2) entered forwarding state
[    3.411849] br0: port 1(c1) entered blocking state
[    3.411909] br0: port 1(c1) entered forwarding state
[    3.429532] Bridge firewalling registered
[   14.390702] ------------[ cut here ]------------
[   14.390818] refcount_t: underflow; use-after-free.
[   14.390875] WARNING: CPU: 1 PID: 68 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[   14.390972] Modules linked in: nf_conntrack_netlink nfnetlink_queue nft_queue nft_ct nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables br_netfilter veth bridge stp llc
[   14.391132] CPU: 1 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[   14.391198] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.391240] Workqueue: netns cleanup_net
[   14.391276] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[   14.391328] Code: ac e8 18 ed b9 ff 90 0f 0b 90 90 c3 80 3d d9 ea ea 00 00 75 89 c6 05 d0 ea ea 00 01 90 48 c7 c7 78 de 11 ac e8 f5 ec b9 ff 90 <0f> 0b 90 90 c3 80 3d b4 ea ea 00 00 0f 85 62 ff ff ff c6 05 a7 ea
[   14.391476] RSP: 0018:ffffac9a4025fd50 EFLAGS: 00010286
[   14.391514] RAX: 0000000000000000 RBX: ffffac9a4025fd60 RCX: 00000000ffffdfff
[   14.391589] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   14.391658] RBP: ffffac9a4025f868 R08: ffffffffac556d28 R09: 00000000ffffdfff
[   14.391734] R10: ffffffffac476d40 R11: ffffffffac526d40 R12: dead000000000122
[   14.391829] R13: 00000000fffba3d7 R14: 0000000000000001 R15: ffff9a7145a09000
[   14.391903] FS:  0000000000000000(0000) GS:ffff9a71d2058000(0000) knlGS:0000000000000000
[   14.391999] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   14.392079] CR2: 000056478cda6d28 CR3: 0000000024e41002 CR4: 0000000000772ef0
[   14.392155] PKRU: 55555554
[   14.392196] Call Trace:
[   14.392235]  <TASK>
[   14.392252]  netdev_run_todo+0x21a/0x550
[   14.392301]  ops_undo_list+0x1e3/0x1f0
[   14.392350]  cleanup_net+0x1b7/0x2b0
[   14.392382]  process_one_work+0x162/0x380
[   14.392431]  worker_thread+0x299/0x3c0
[   14.392467]  ? rescuer_thread+0x4c0/0x4c0
[   14.392500]  kthread+0x101/0x1f0
[   14.392530]  ? kthreads_online_cpu+0x110/0x110
[   14.392569]  ? kthreads_online_cpu+0x110/0x110
[   14.392608]  ret_from_fork+0x11c/0x140
[   14.392646]  ? kthreads_online_cpu+0x110/0x110
[   14.392685]  ret_from_fork_asm+0x11/0x20
[   14.392718]  </TASK>
[   14.392745] ---[ end trace 0000000000000000 ]---
[   14.392933] br0: port 1(c1) entered disabled state
[   14.393246] c1 (unregistering): left allmulticast mode
[   14.393294] c1 (unregistering): left promiscuous mode
[   14.393333] br0: port 1(c1) entered disabled state
[   14.440845] br0: port 2(c2) entered disabled state
[   14.441175] c2 (unregistering): left allmulticast mode
[   14.441228] c2 (unregistering): left promiscuous mode
[   14.441320] br0: port 2(c2) entered disabled state
[   14.492836] br0: port 3(c3) entered disabled state
[   14.493156] c3 (unregistering): left allmulticast mode
[   14.493215] c3 (unregistering): left promiscuous mode
[   14.493256] br0: port 3(c3) entered disabled state
[   14.539805] br0: port 4(sender) entered disabled state
[   14.540114] sender (unregistering): left allmulticast mode
[   14.540161] sender (unregistering): left promiscuous mode
[   14.540201] br0: port 4(sender) entered disabled state