[ 119.215811][ T12] ==================================================================
[ 119.216173][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 119.216457][ T12] Read of size 1 at addr ffff8880091c96c4 by task kworker/u16:0/12
[ 119.216684][ T12]
[ 119.216779][ T12] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 119.216784][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 119.216789][ T12] Workqueue: netns cleanup_net
[ 119.216803][ T12] Call Trace:
[ 119.216805][ T12]
[ 119.216808][ T12] dump_stack_lvl+0x82/0xc0
[ 119.216815][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 119.216827][ T12] ? kobject_put+0xbb/0xd0
[ 119.216831][ T12] print_report+0xb4/0x270
[ 119.216835][ T12] ? kobject_put+0xbb/0xd0
[ 119.216838][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 119.216841][ T12] ? kobject_put+0xbb/0xd0
[ 119.216844][ T12] kasan_report+0xca/0x100
[ 119.216848][ T12] ? kobject_put+0xbb/0xd0
[ 119.216854][ T12] kobject_put+0xbb/0xd0
[ 119.216857][ T12] netdev_run_todo+0x5f0/0xc60
[ 119.216864][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 119.216868][ T12] ? generic_xdp_install+0x410/0x410
[ 119.216871][ T12] ? net_generic+0xb1/0x1f0
[ 119.216880][ T12] ops_undo_list+0x714/0x890
[ 119.216885][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 119.216889][ T12] ? cleanup_net+0x2d6/0x8b0
[ 119.216895][ T12] cleanup_net+0x3b2/0x8b0
[ 119.216899][ T12] ? net_passive_dec+0x190/0x190
[ 119.216904][ T12] ? rcu_is_watching+0x12/0xb0
[ 119.216916][ T12] process_one_work+0xe35/0x1650
[ 119.216928][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 119.216933][ T12] ? assign_work+0x168/0x240
[ 119.216937][ T12] worker_thread+0x591/0xcf0
[ 119.216943][ T12] ? rescuer_thread+0xd10/0xd10
[ 119.216947][ T12] kthread+0x37b/0x5f0
[ 119.216951][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 119.216954][ T12] ? ret_from_fork+0x1b/0x270
[ 119.216960][ T12] ? __lock_release+0x5d/0x170
[ 119.216964][ T12] ? rcu_is_watching+0x12/0xb0
[ 119.216967][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 119.216971][ T12] ret_from_fork+0x1db/0x270
[ 119.216973][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 119.216976][ T12] ret_from_fork_asm+0x11/0x20
[ 119.216985][ T12]
[ 119.216986][ T12]
[ 119.222953][ T12] Allocated by task 267:
[ 119.223067][ T12] kasan_save_stack+0x24/0x40
[ 119.223226][ T12] kasan_save_track+0x14/0x30
[ 119.223381][ T12] __kasan_kmalloc+0x7b/0x90
[ 119.223533][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 119.223688][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 119.223850][ T12] ip6_tnl_init_net+0x102/0x3f0
[ 119.224005][ T12] ops_init+0x189/0x550
[ 119.224119][ T12] setup_net+0xf1/0x380
[ 119.224237][ T12] copy_net_ns+0x253/0x510
[ 119.224392][ T12] create_new_namespaces+0x35f/0x900
[ 119.224547][ T12] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 119.224697][ T12] ksys_unshare+0x2be/0x6e0
[ 119.224854][ T12] __x64_sys_unshare+0x31/0x40
[ 119.225025][ T12] do_syscall_64+0xc1/0xfd0
[ 119.225180][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 119.225375][ T12]
[ 119.225452][ T12] Freed by task 12:
[ 119.225563][ T12] kasan_save_stack+0x24/0x40
[ 119.225716][ T12] kasan_save_track+0x14/0x30
[ 119.225873][ T12] __kasan_save_free_info+0x3b/0x60
[ 119.226029][ T12] __kasan_slab_free+0x3f/0x60
[ 119.226179][ T12] kfree+0x21d/0x540
[ 119.226298][ T12] device_release+0x9c/0x210
[ 119.226450][ T12] kobject_cleanup+0xfe/0x360
[ 119.226622][ T12] netdev_run_todo+0x81f/0xc60
[ 119.226779][ T12] ops_undo_list+0x714/0x890
[ 119.226932][ T12] cleanup_net+0x3b2/0x8b0
[ 119.227081][ T12] process_one_work+0xe35/0x1650
[ 119.227251][ T12] worker_thread+0x591/0xcf0
[ 119.227409][ T12] kthread+0x37b/0x5f0
[ 119.227529][ T12] ret_from_fork+0x1db/0x270
[ 119.227780][ T12] ret_from_fork_asm+0x11/0x20
[ 119.227938][ T12]
[ 119.228015][ T12] The buggy address belongs to the object at ffff8880091c9000
[ 119.228015][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 119.228472][ T12] The buggy address is located 1732 bytes inside of
[ 119.228472][ T12] freed 4096-byte region [ffff8880091c9000, ffff8880091ca000)
[ 119.228849][ T12]
[ 119.228925][ T12] The buggy address belongs to the physical page:
[ 119.229196][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x91c8
[ 119.229467][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 119.229698][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 119.229991][ T12] page_type: f5(slab)
[ 119.230112][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000245410 ffffea000024e610
[ 119.230390][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 119.230758][ T12] head: 0080000000000040 ffff888001043700 ffffea0000245410 ffffea000024e610
[ 119.231032][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 119.231401][ T12] head: 0080000000000003 ffffea0000247201 00000000ffffffff 00000000ffffffff
[ 119.231670][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 119.232033][ T12] page dumped because: kasan: bad access detected
[ 119.232226][ T12]
[ 119.232309][ T12] Memory state around the buggy address:
[ 119.232453][ T12] ffff8880091c9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 119.232769][ T12] ffff8880091c9600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 119.232989][ T12] >ffff8880091c9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 119.233210][ T12] ^
[ 119.233478][ T12] ffff8880091c9700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 119.233694][ T12] ffff8880091c9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 119.233918][ T12] ==================================================================
[ 119.234476][ T12] Disabling lock debugging due to kernel taint
[ 119.234830][ T12] ------------[ cut here ]------------
[ 119.235002][ T12] refcount_t: underflow; use-after-free.
[ 119.235494][ T12] WARNING: CPU: 1 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 119.235815][ T12] Modules linked in:
[ 119.235948][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 119.236362][ T12] Tainted: [B]=BAD_PAGE
[ 119.236490][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 119.236701][ T12] Workqueue: netns cleanup_net
[ 119.236896][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 119.237109][ 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 45 ba 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
[ 119.237732][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 119.237944][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 119.238207][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 119.238475][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff7680934
[ 119.238724][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 119.238969][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 119.239230][ T12] FS: 0000000000000000(0000) GS:ffff8880b0788000(0000) knlGS:0000000000000000
[ 119.239541][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 119.239769][ T12] CR2: 00005626cb4942b8 CR3: 000000003ad49005 CR4: 0000000000772ef0
[ 119.240027][ T12] PKRU: 55555554
[ 119.240157][ T12] Call Trace:
[ 119.240296][ T12]
[ 119.240399][ T12] netdev_run_todo+0x5f0/0xc60
[ 119.240573][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 119.240756][ T12] ? generic_xdp_install+0x410/0x410
[ 119.240920][ T12] ? net_generic+0xb1/0x1f0
[ 119.241089][ T12] ops_undo_list+0x714/0x890
[ 119.241261][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 119.241449][ T12] ? cleanup_net+0x2d6/0x8b0
[ 119.241620][ T12] cleanup_net+0x3b2/0x8b0
[ 119.241779][ T12] ? net_passive_dec+0x190/0x190
[ 119.241949][ T12] ? rcu_is_watching+0x12/0xb0
[ 119.242121][ T12] process_one_work+0xe35/0x1650
[ 119.242307][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 119.242482][ T12] ? assign_work+0x168/0x240
[ 119.242645][ T12] worker_thread+0x591/0xcf0
[ 119.242818][ T12] ? rescuer_thread+0xd10/0xd10
[ 119.243067][ T12] kthread+0x37b/0x5f0
[ 119.243201][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 119.243384][ T12] ? ret_from_fork+0x1b/0x270
[ 119.243558][ T12] ? __lock_release+0x5d/0x170
[ 119.243804][ T12] ? rcu_is_watching+0x12/0xb0
[ 119.243969][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 119.244129][ T12] ret_from_fork+0x1db/0x270
[ 119.244307][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 119.244563][ T12] ret_from_fork_asm+0x11/0x20
[ 119.244734][ T12]
[ 119.244862][ T12] irq event stamp: 16527
[ 119.245002][ T12] hardirqs last enabled at (16527): [] finish_task_switch.isra.0+0x245/0x960
[ 119.245437][ T12] hardirqs last disabled at (16526): [] __schedule+0x94a/0x1b10
[ 119.245728][ T12] softirqs last enabled at (15980): [] handle_softirqs+0x352/0x610
[ 119.246089][ T12] softirqs last disabled at (15971): [] irq_exit_rcu+0xab/0x100
[ 119.246398][ T12] ---[ end trace 0000000000000000 ]---
[ 178.706021][ T1444] mpls_gso: MPLS GSO support