[ 22.043405][ T301] eth0: renamed from r1h0
[ 22.926505][ T308] eth1: renamed from r1h1
[ 23.840645][ T315] eth2: renamed from r1h2
[ 24.764224][ T322] eth3: renamed from r1h3
[ 40.602926][ T12] ==================================================================
[ 40.603261][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 40.603536][ T12] Read of size 1 at addr ffff8880053096c4 by task kworker/u16:0/12
[ 40.603811][ T12]
[ 40.603902][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 40.603907][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 40.603911][ T12] Workqueue: netns cleanup_net
[ 40.603921][ T12] Call Trace:
[ 40.603923][ T12]
[ 40.603926][ T12] dump_stack_lvl+0x82/0xc0
[ 40.603942][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 40.603950][ T12] ? kobject_put+0xbb/0xd0
[ 40.603954][ T12] print_report+0xb4/0x270
[ 40.603957][ T12] ? kobject_put+0xbb/0xd0
[ 40.603960][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 40.603964][ T12] ? kobject_put+0xbb/0xd0
[ 40.603967][ T12] kasan_report+0xca/0x100
[ 40.603971][ T12] ? kobject_put+0xbb/0xd0
[ 40.603976][ T12] kobject_put+0xbb/0xd0
[ 40.603980][ T12] netdev_run_todo+0x5f0/0xc60
[ 40.603986][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 40.603991][ T12] ? generic_xdp_install+0x410/0x410
[ 40.603993][ T12] ? net_generic+0xb1/0x1f0
[ 40.604006][ T12] ops_undo_list+0x714/0x890
[ 40.604011][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 40.604015][ T12] ? cleanup_net+0x2d6/0x8b0
[ 40.604021][ T12] cleanup_net+0x3b2/0x8b0
[ 40.604025][ T12] ? net_passive_dec+0x190/0x190
[ 40.604030][ T12] ? rcu_is_watching+0x12/0xb0
[ 40.604038][ T12] process_one_work+0xe35/0x1650
[ 40.604049][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 40.604055][ T12] ? assign_work+0x168/0x240
[ 40.604059][ T12] worker_thread+0x591/0xcf0
[ 40.604065][ T12] ? rescuer_thread+0xd10/0xd10
[ 40.604069][ T12] kthread+0x37b/0x5f0
[ 40.604073][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 40.604076][ T12] ? ret_from_fork+0x1b/0x270
[ 40.604081][ T12] ? __lock_release+0x5d/0x170
[ 40.604086][ T12] ? rcu_is_watching+0x12/0xb0
[ 40.604090][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 40.604093][ T12] ret_from_fork+0x1db/0x270
[ 40.604096][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 40.604099][ T12] ret_from_fork_asm+0x11/0x20
[ 40.604109][ T12]
[ 40.604110][ T12]
[ 40.611746][ T12] Allocated by task 262:
[ 40.611877][ T12] kasan_save_stack+0x24/0x40
[ 40.612062][ T12] kasan_save_track+0x14/0x30
[ 40.612236][ T12] __kasan_kmalloc+0x7b/0x90
[ 40.612419][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 40.612652][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 40.612831][ T12] ip6_tnl_init_net+0x102/0x3f0
[ 40.613010][ T12] ops_init+0x189/0x550
[ 40.613140][ T12] setup_net+0xf1/0x380
[ 40.613274][ T12] copy_net_ns+0x253/0x510
[ 40.613450][ T12] create_new_namespaces+0x35f/0x900
[ 40.613651][ T12] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 40.613854][ T12] ksys_unshare+0x2be/0x6e0
[ 40.614082][ T12] __x64_sys_unshare+0x31/0x40
[ 40.614261][ T12] do_syscall_64+0xc1/0xfd0
[ 40.614442][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 40.614728][ T12]
[ 40.614837][ T12] Freed by task 12:
[ 40.614965][ T12] kasan_save_stack+0x24/0x40
[ 40.615195][ T12] kasan_save_track+0x14/0x30
[ 40.615374][ T12] __kasan_save_free_info+0x3b/0x60
[ 40.615599][ T12] __kasan_slab_free+0x3f/0x60
[ 40.615787][ T12] kfree+0x21d/0x540
[ 40.615947][ T12] device_release+0x9c/0x210
[ 40.616163][ T12] kobject_cleanup+0xfe/0x360
[ 40.616356][ T12] netdev_run_todo+0x81f/0xc60
[ 40.616588][ T12] ops_undo_list+0x714/0x890
[ 40.616831][ T12] cleanup_net+0x3b2/0x8b0
[ 40.617047][ T12] process_one_work+0xe35/0x1650
[ 40.617248][ T12] worker_thread+0x591/0xcf0
[ 40.617437][ T12] kthread+0x37b/0x5f0
[ 40.617606][ T12] ret_from_fork+0x1db/0x270
[ 40.617789][ T12] ret_from_fork_asm+0x11/0x20
[ 40.618001][ T12]
[ 40.618101][ T12] The buggy address belongs to the object at ffff888005309000
[ 40.618101][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 40.618614][ T12] The buggy address is located 1732 bytes inside of
[ 40.618614][ T12] freed 4096-byte region [ffff888005309000, ffff88800530a000)
[ 40.619139][ T12]
[ 40.619239][ T12] The buggy address belongs to the physical page:
[ 40.619485][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5308
[ 40.619904][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 40.620211][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 40.620474][ T12] page_type: f5(slab)
[ 40.620632][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000233010 ffffea00001c9e10
[ 40.621023][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 40.621370][ T12] head: 0080000000000040 ffff888001043700 ffffea0000233010 ffffea00001c9e10
[ 40.621726][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 40.622080][ T12] head: 0080000000000003 ffffea000014c201 00000000ffffffff 00000000ffffffff
[ 40.622443][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 40.622796][ T12] page dumped because: kasan: bad access detected
[ 40.623047][ T12]
[ 40.623140][ T12] Memory state around the buggy address:
[ 40.623337][ T12] ffff888005309580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 40.623629][ T12] ffff888005309600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 40.623942][ T12] >ffff888005309680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 40.624235][ T12] ^
[ 40.624463][ T12] ffff888005309700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 40.624848][ T12] ffff888005309780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 40.625121][ T12] ==================================================================
[ 40.625513][ T12] Disabling lock debugging due to kernel taint
[ 40.625790][ T12] ------------[ cut here ]------------
[ 40.626031][ T12] refcount_t: underflow; use-after-free.
[ 40.626247][ T12] WARNING: CPU: 2 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 40.626589][ T12] Modules linked in:
[ 40.626746][ T12] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 40.627191][ T12] Tainted: [B]=BAD_PAGE
[ 40.627345][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 40.627591][ T12] Workqueue: netns cleanup_net
[ 40.627798][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 40.628061][ T12] Code: cc 38 03 80 fb 01 0f 87 29 33 d7 fe 83 e3 01 0f 85 51 ff ff ff c6 05 17 cc 38 03 01 90 48 c7 c7 40 ba e5 8c e8 62 d6 16 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 c0 9d a0 ff e9 ba fe ff ff
[ 40.628704][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 40.628956][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 40.629244][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 40.629523][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff1bc0934
[ 40.629847][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 40.630141][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 40.630417][ T12] FS: 0000000000000000(0000) GS:ffff8880dde08000(0000) knlGS:0000000000000000
[ 40.630745][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 40.630999][ T12] CR2: 000055b9194c7a68 CR3: 000000002cb49001 CR4: 0000000000772ef0
[ 40.631273][ T12] PKRU: 55555554
[ 40.631421][ T12] Call Trace:
[ 40.631580][ T12]
[ 40.631692][ T12] netdev_run_todo+0x5f0/0xc60
[ 40.631893][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 40.632096][ T12] ? generic_xdp_install+0x410/0x410
[ 40.632282][ T12] ? net_generic+0xb1/0x1f0
[ 40.632489][ T12] ops_undo_list+0x714/0x890
[ 40.632694][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 40.632911][ T12] ? cleanup_net+0x2d6/0x8b0
[ 40.633130][ T12] cleanup_net+0x3b2/0x8b0
[ 40.633329][ T12] ? net_passive_dec+0x190/0x190
[ 40.633529][ T12] ? rcu_is_watching+0x12/0xb0
[ 40.633753][ T12] process_one_work+0xe35/0x1650
[ 40.633982][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 40.634181][ T12] ? assign_work+0x168/0x240
[ 40.634376][ T12] worker_thread+0x591/0xcf0
[ 40.634570][ T12] ? rescuer_thread+0xd10/0xd10
[ 40.634769][ T12] kthread+0x37b/0x5f0
[ 40.634928][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 40.635125][ T12] ? ret_from_fork+0x1b/0x270
[ 40.635321][ T12] ? __lock_release+0x5d/0x170
[ 40.635517][ T12] ? rcu_is_watching+0x12/0xb0
[ 40.635725][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 40.635924][ T12] ret_from_fork+0x1db/0x270
[ 40.636120][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 40.636310][ T12] ret_from_fork_asm+0x11/0x20
[ 40.636517][ T12]
[ 40.636681][ T12] irq event stamp: 26343
[ 40.636831][ T12] hardirqs last enabled at (26343): [] finish_task_switch.isra.0+0x245/0x960
[ 40.637208][ T12] hardirqs last disabled at (26342): [] __schedule+0x94a/0x1b10
[ 40.637527][ T12] softirqs last enabled at (25802): [] handle_softirqs+0x352/0x610
[ 40.637881][ T12] softirqs last disabled at (25793): [] irq_exit_rcu+0xab/0x100
[ 40.638214][ T12] ---[ end trace 0000000000000000 ]---