[ 21.112065][ T256] ip (256) used greatest stack depth: 24128 bytes left
[ 28.996088][ T298] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 29.975340][ T306] br0: port 1(c1) entered blocking state
[ 29.975837][ T306] br0: port 1(c1) entered disabled state
[ 29.976284][ T306] c1: entered allmulticast mode
[ 29.979830][ T306] c1: entered promiscuous mode
[ 30.800045][ T311] br0: port 2(c2) entered blocking state
[ 30.800406][ T311] br0: port 2(c2) entered disabled state
[ 30.800940][ T311] c2: entered allmulticast mode
[ 30.804477][ T311] c2: entered promiscuous mode
[ 31.571172][ T316] br0: port 3(c3) entered blocking state
[ 31.571575][ T316] br0: port 3(c3) entered disabled state
[ 31.572128][ T316] c3: entered allmulticast mode
[ 31.575640][ T316] c3: entered promiscuous mode
[ 32.332555][ T321] br0: port 4(sender) entered blocking state
[ 32.333338][ T321] br0: port 4(sender) entered disabled state
[ 32.333826][ T321] sender: entered allmulticast mode
[ 32.337275][ T321] sender: entered promiscuous mode
[ 32.638688][ T323] br0: port 4(sender) entered blocking state
[ 32.639376][ T323] br0: port 4(sender) entered forwarding state
[ 32.640812][ T323] br0: port 3(c3) entered blocking state
[ 32.641265][ T323] br0: port 3(c3) entered forwarding state
[ 32.642072][ T323] br0: port 2(c2) entered blocking state
[ 32.642479][ T323] br0: port 2(c2) entered forwarding state
[ 32.643228][ T323] br0: port 1(c1) entered blocking state
[ 32.643643][ T323] br0: port 1(c1) entered forwarding state
[ 32.859575][ T324] Bridge firewalling registered
[ 47.336433][ T12] ==================================================================
[ 47.336762][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 47.337099][ T12] Read of size 1 at addr ffff8880093396ac by task kworker/u16:0/12
[ 47.337409][ T12]
[ 47.337518][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 47.337525][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 47.337529][ T12] Workqueue: netns cleanup_net
[ 47.337539][ T12] Call Trace:
[ 47.337542][ T12]
[ 47.337545][ T12] dump_stack_lvl+0x82/0xc0
[ 47.337553][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 47.337562][ T12] ? kobject_put+0xbb/0xd0
[ 47.337568][ T12] print_report+0xb4/0x270
[ 47.337574][ T12] ? kobject_put+0xbb/0xd0
[ 47.337579][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 47.337583][ T12] ? kobject_put+0xbb/0xd0
[ 47.337586][ T12] kasan_report+0xca/0x100
[ 47.337594][ T12] ? kobject_put+0xbb/0xd0
[ 47.337600][ T12] kobject_put+0xbb/0xd0
[ 47.337604][ T12] netdev_run_todo+0x5f0/0xc60
[ 47.337611][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 47.337615][ T12] ? generic_xdp_install+0x410/0x410
[ 47.337622][ T12] ops_undo_list+0x714/0x890
[ 47.337633][ T12] ? netns_get+0x110/0x110
[ 47.337636][ T12] ? cleanup_net+0x2d6/0x830
[ 47.337641][ T12] cleanup_net+0x3b2/0x830
[ 47.337645][ T12] ? net_passive_dec+0x190/0x190
[ 47.337649][ T12] ? rcu_is_watching+0x12/0xb0
[ 47.337659][ T12] process_one_work+0xe35/0x1650
[ 47.337671][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 47.337681][ T12] ? assign_work+0x168/0x240
[ 47.337688][ T12] worker_thread+0x591/0xcf0
[ 47.337697][ T12] ? rescuer_thread+0xd10/0xd10
[ 47.337701][ T12] kthread+0x37b/0x5f0
[ 47.337706][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 47.337708][ T12] ? ret_from_fork+0x1b/0x270
[ 47.337715][ T12] ? __lock_release+0x5d/0x170
[ 47.337722][ T12] ? rcu_is_watching+0x12/0xb0
[ 47.337725][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 47.337729][ T12] ret_from_fork+0x1db/0x270
[ 47.337732][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 47.337735][ T12] ret_from_fork_asm+0x11/0x20
[ 47.337746][ T12]
[ 47.337748][ T12]
[ 47.346575][ T12] Allocated by task 278:
[ 47.346715][ T12] kasan_save_stack+0x24/0x40
[ 47.346930][ T12] kasan_save_track+0x14/0x30
[ 47.347092][ T12] __kasan_kmalloc+0x7b/0x90
[ 47.347255][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 47.347425][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 47.347605][ T12] sit_init_net+0x169/0x550
[ 47.347776][ T12] ops_init+0x189/0x550
[ 47.347899][ T12] setup_net+0xf1/0x380
[ 47.348015][ T12] copy_net_ns+0x21a/0x380
[ 47.348214][ T12] create_new_namespaces+0x35f/0x900
[ 47.348457][ T12] unshare_nsproxy_namespaces+0x89/0x120
[ 47.348631][ T12] ksys_unshare+0x2a3/0x660
[ 47.348819][ T12] __x64_sys_unshare+0x31/0x40
[ 47.348982][ T12] do_syscall_64+0xc1/0xfd0
[ 47.349150][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 47.349388][ T12]
[ 47.349498][ T12] Freed by task 12:
[ 47.349654][ T12] kasan_save_stack+0x24/0x40
[ 47.349866][ T12] kasan_save_track+0x14/0x30
[ 47.350073][ T12] __kasan_save_free_info+0x3b/0x60
[ 47.350254][ T12] __kasan_slab_free+0x3f/0x60
[ 47.350415][ T12] kfree+0x21d/0x540
[ 47.350547][ T12] device_release+0x9c/0x210
[ 47.350738][ T12] kobject_cleanup+0xfe/0x360
[ 47.350901][ T12] netdev_run_todo+0x81f/0xc60
[ 47.351101][ T12] ops_undo_list+0x714/0x890
[ 47.351339][ T12] cleanup_net+0x3b2/0x830
[ 47.351523][ T12] process_one_work+0xe35/0x1650
[ 47.351709][ T12] worker_thread+0x591/0xcf0
[ 47.351898][ T12] kthread+0x37b/0x5f0
[ 47.352060][ T12] ret_from_fork+0x1db/0x270
[ 47.352268][ T12] ret_from_fork_asm+0x11/0x20
[ 47.352482][ T12]
[ 47.352585][ T12] The buggy address belongs to the object at ffff888009339000
[ 47.352585][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 47.353024][ T12] The buggy address is located 1708 bytes inside of
[ 47.353024][ T12] freed 4096-byte region [ffff888009339000, ffff88800933a000)
[ 47.353486][ T12]
[ 47.353588][ T12] The buggy address belongs to the physical page:
[ 47.353794][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9338
[ 47.354086][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 47.354339][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 47.354545][ T12] page_type: f5(slab)
[ 47.354670][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000323a10 ffffea000020b010
[ 47.354975][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 47.355361][ T12] head: 0080000000000040 ffff888001043700 ffffea0000323a10 ffffea000020b010
[ 47.355655][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 47.356194][ T12] head: 0080000000000003 ffffea000024ce01 00000000ffffffff 00000000ffffffff
[ 47.356481][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 47.356890][ T12] page dumped because: kasan: bad access detected
[ 47.357096][ T12]
[ 47.357185][ T12] Memory state around the buggy address:
[ 47.357347][ T12] ffff888009339580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 47.357587][ T12] ffff888009339600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 47.357821][ T12] >ffff888009339680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 47.358072][ T12] ^
[ 47.358318][ T12] ffff888009339700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 47.358549][ T12] ffff888009339780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 47.358872][ T12] ==================================================================
[ 47.359196][ T12] Disabling lock debugging due to kernel taint
[ 47.359519][ T12] ------------[ cut here ]------------
[ 47.359736][ T12] refcount_t: underflow; use-after-free.
[ 47.359960][ T12] WARNING: CPU: 3 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 47.360334][ T12] 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
[ 47.361020][ T12] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 47.361513][ T12] Tainted: [B]=BAD_PAGE
[ 47.361663][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 47.361924][ T12] Workqueue: netns cleanup_net
[ 47.362130][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 47.362385][ T12] Code: 83 90 02 80 fb 01 0f 87 95 6b d6 fe 83 e3 01 0f 85 51 ff ff ff c6 05 b1 83 90 02 01 90 48 c7 c7 a0 de 65 91 e8 c2 8b 15 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 f0 34 a1 ff e9 ba fe ff ff
[ 47.363027][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 47.363296][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 47.363682][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 47.364277][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff23fe220
[ 47.364593][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 47.364880][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 47.365250][ T12] FS: 0000000000000000(0000) GS:ffff8880a2f6c000(0000) knlGS:0000000000000000
[ 47.365541][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 47.365768][ T12] CR2: 00005590906e9dec CR3: 0000000008a20001 CR4: 0000000000772ef0
[ 47.366165][ T12] PKRU: 55555554
[ 47.366303][ T12] Call Trace:
[ 47.366428][ T12]
[ 47.366512][ T12] netdev_run_todo+0x5f0/0xc60
[ 47.366816][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 47.366993][ T12] ? generic_xdp_install+0x410/0x410
[ 47.367165][ T12] ops_undo_list+0x714/0x890
[ 47.367331][ T12] ? netns_get+0x110/0x110
[ 47.367583][ T12] ? cleanup_net+0x2d6/0x830
[ 47.367777][ T12] cleanup_net+0x3b2/0x830
[ 47.367940][ T12] ? net_passive_dec+0x190/0x190
[ 47.368104][ T12] ? rcu_is_watching+0x12/0xb0
[ 47.368290][ T12] process_one_work+0xe35/0x1650
[ 47.368481][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 47.368666][ T12] ? assign_work+0x168/0x240
[ 47.368841][ T12] worker_thread+0x591/0xcf0
[ 47.369139][ T12] ? rescuer_thread+0xd10/0xd10
[ 47.369342][ T12] kthread+0x37b/0x5f0
[ 47.369477][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 47.369667][ T12] ? ret_from_fork+0x1b/0x270
[ 47.369959][ T12] ? __lock_release+0x5d/0x170
[ 47.370140][ T12] ? rcu_is_watching+0x12/0xb0
[ 47.370328][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 47.370502][ T12] ret_from_fork+0x1db/0x270
[ 47.370682][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 47.370867][ T12] ret_from_fork_asm+0x11/0x20
[ 47.371048][ T12]
[ 47.371185][ T12] irq event stamp: 12299
[ 47.371319][ T12] hardirqs last enabled at (12299): [] finish_task_switch.isra.0+0x245/0x960
[ 47.371678][ T12] hardirqs last disabled at (12298): [] __schedule+0x94a/0x1b10
[ 47.372013][ T12] softirqs last enabled at (12192): [] handle_softirqs+0x352/0x610
[ 47.372547][ T12] softirqs last disabled at (12187): [] irq_exit_rcu+0xab/0x100
[ 47.372866][ T12] ---[ end trace 0000000000000000 ]---
[ 47.376293][ T12] br0: port 1(c1) entered disabled state
[ 47.383092][ T12] c1 (unregistering): left allmulticast mode
[ 47.383409][ T12] c1 (unregistering): left promiscuous mode
[ 47.383657][ T12] br0: port 1(c1) entered disabled state
[ 47.726476][ T12] br0: port 2(c2) entered disabled state
[ 47.732310][ T12] c2 (unregistering): left allmulticast mode
[ 47.732696][ T12] c2 (unregistering): left promiscuous mode
[ 47.734276][ T12] br0: port 2(c2) entered disabled state
[ 48.089024][ T12] br0: port 3(c3) entered disabled state
[ 48.095751][ T12] c3 (unregistering): left allmulticast mode
[ 48.096128][ T12] c3 (unregistering): left promiscuous mode
[ 48.096389][ T12] br0: port 3(c3) entered disabled state
[ 48.488137][ T12] br0: port 4(sender) entered disabled state
[ 48.491897][ T12] sender (unregistering): left allmulticast mode
[ 48.492209][ T12] sender (unregistering): left promiscuous mode
[ 48.492529][ T12] br0: port 4(sender) entered disabled state