[ 16.286272][ T261] ip (261) used greatest stack depth: 23664 bytes left
[ 27.232105][ T12] ==================================================================
[ 27.232420][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 27.232688][ T12] Read of size 1 at addr ffff8880089b96c4 by task kworker/u16:0/12
[ 27.232939][ T12]
[ 27.233028][ T12] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 27.233033][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 27.233036][ T12] Workqueue: netns cleanup_net
[ 27.233044][ T12] Call Trace:
[ 27.233046][ T12]
[ 27.233049][ T12] dump_stack_lvl+0x82/0xc0
[ 27.233054][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 27.233061][ T12] ? kobject_put+0xbb/0xd0
[ 27.233065][ T12] print_report+0xb4/0x270
[ 27.233068][ T12] ? kobject_put+0xbb/0xd0
[ 27.233071][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 27.233075][ T12] ? kobject_put+0xbb/0xd0
[ 27.233078][ T12] kasan_report+0xca/0x100
[ 27.233081][ T12] ? kobject_put+0xbb/0xd0
[ 27.233087][ T12] kobject_put+0xbb/0xd0
[ 27.233090][ T12] netdev_run_todo+0x5f0/0xc60
[ 27.233095][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 27.233099][ T12] ? generic_xdp_install+0x410/0x410
[ 27.233102][ T12] ? net_generic+0xb1/0x1f0
[ 27.233110][ T12] ops_undo_list+0x714/0x890
[ 27.233115][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 27.233118][ T12] ? cleanup_net+0x2d6/0x8b0
[ 27.233124][ T12] cleanup_net+0x3b2/0x8b0
[ 27.233129][ T12] ? net_passive_dec+0x190/0x190
[ 27.233133][ T12] ? rcu_is_watching+0x12/0xb0
[ 27.233140][ T12] process_one_work+0xe35/0x1650
[ 27.233148][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 27.233154][ T12] ? assign_work+0x168/0x240
[ 27.233158][ T12] worker_thread+0x591/0xcf0
[ 27.233164][ T12] ? rescuer_thread+0xd10/0xd10
[ 27.233168][ T12] kthread+0x37b/0x5f0
[ 27.233172][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.233175][ T12] ? ret_from_fork+0x1b/0x270
[ 27.233179][ T12] ? __lock_release+0x5d/0x170
[ 27.233183][ T12] ? rcu_is_watching+0x12/0xb0
[ 27.233187][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.233190][ T12] ret_from_fork+0x1db/0x270
[ 27.233193][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.233196][ T12] ret_from_fork_asm+0x11/0x20
[ 27.233206][ T12]
[ 27.233207][ T12]
[ 27.240244][ T12] Allocated by task 260:
[ 27.240374][ T12] kasan_save_stack+0x24/0x40
[ 27.240561][ T12] kasan_save_track+0x14/0x30
[ 27.240733][ T12] __kasan_kmalloc+0x7b/0x90
[ 27.240919][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 27.241108][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 27.241291][ T12] ip6_tnl_init_net+0x102/0x3f0
[ 27.241481][ T12] ops_init+0x189/0x550
[ 27.241627][ T12] setup_net+0xf1/0x380
[ 27.241766][ T12] copy_net_ns+0x253/0x510
[ 27.241956][ T12] create_new_namespaces+0x35f/0x900
[ 27.242154][ T12] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 27.242341][ T12] ksys_unshare+0x2be/0x6e0
[ 27.242525][ T12] __x64_sys_unshare+0x31/0x40
[ 27.242717][ T12] do_syscall_64+0xc1/0xfd0
[ 27.242910][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 27.243145][ T12]
[ 27.243242][ T12] Freed by task 12:
[ 27.243386][ T12] kasan_save_stack+0x24/0x40
[ 27.243578][ T12] kasan_save_track+0x14/0x30
[ 27.243765][ T12] __kasan_save_free_info+0x3b/0x60
[ 27.243965][ T12] __kasan_slab_free+0x3f/0x60
[ 27.244151][ T12] kfree+0x21d/0x540
[ 27.244291][ T12] device_release+0x9c/0x210
[ 27.244490][ T12] kobject_cleanup+0xfe/0x360
[ 27.244694][ T12] netdev_run_todo+0x81f/0xc60
[ 27.244895][ T12] ops_undo_list+0x714/0x890
[ 27.245082][ T12] cleanup_net+0x3b2/0x8b0
[ 27.245260][ T12] process_one_work+0xe35/0x1650
[ 27.245445][ T12] worker_thread+0x591/0xcf0
[ 27.245637][ T12] kthread+0x37b/0x5f0
[ 27.245778][ T12] ret_from_fork+0x1db/0x270
[ 27.245973][ T12] ret_from_fork_asm+0x11/0x20
[ 27.246160][ T12]
[ 27.246267][ T12] The buggy address belongs to the object at ffff8880089b9000
[ 27.246267][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 27.246731][ T12] The buggy address is located 1732 bytes inside of
[ 27.246731][ T12] freed 4096-byte region [ffff8880089b9000, ffff8880089ba000)
[ 27.247190][ T12]
[ 27.247294][ T12] The buggy address belongs to the physical page:
[ 27.247528][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x89b8
[ 27.247868][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 27.248151][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 27.248388][ T12] page_type: f5(slab)
[ 27.248533][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000227010 ffffea000021d010
[ 27.248876][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 27.249208][ T12] head: 0080000000000040 ffff888001043700 ffffea0000227010 ffffea000021d010
[ 27.249542][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 27.249866][ T12] head: 0080000000000003 ffffea0000226e01 00000000ffffffff 00000000ffffffff
[ 27.250197][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 27.250514][ T12] page dumped because: kasan: bad access detected
[ 27.250760][ T12]
[ 27.250868][ T12] Memory state around the buggy address:
[ 27.251061][ T12] ffff8880089b9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 27.251355][ T12] ffff8880089b9600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 27.251644][ T12] >ffff8880089b9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 27.251931][ T12] ^
[ 27.252163][ T12] ffff8880089b9700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 27.252443][ T12] ffff8880089b9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 27.252713][ T12] ==================================================================
[ 27.253127][ T12] Disabling lock debugging due to kernel taint
[ 27.253411][ T12] ------------[ cut here ]------------
[ 27.253587][ T12] refcount_t: underflow; use-after-free.
[ 27.253800][ T12] WARNING: CPU: 3 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 27.254132][ T12] Modules linked in:
[ 27.254297][ T12] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 27.254726][ T12] Tainted: [B]=BAD_PAGE
[ 27.254877][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 27.255104][ T12] Workqueue: netns cleanup_net
[ 27.255313][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 27.255544][ 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 c5 96 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
[ 27.256216][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 27.256448][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 27.256720][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 27.256991][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff2f80934
[ 27.257272][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 27.257526][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 27.257800][ T12] FS: 0000000000000000(0000) GS:ffff8880cda88000(0000) knlGS:0000000000000000
[ 27.258122][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 27.258359][ T12] CR2: 000055c0f5a94dec CR3: 0000000018644002 CR4: 0000000000772ef0
[ 27.258645][ T12] PKRU: 55555554
[ 27.258778][ T12] Call Trace:
[ 27.258925][ T12]
[ 27.259015][ T12] netdev_run_todo+0x5f0/0xc60
[ 27.259205][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 27.259398][ T12] ? generic_xdp_install+0x410/0x410
[ 27.259574][ T12] ? net_generic+0xb1/0x1f0
[ 27.259761][ T12] ops_undo_list+0x714/0x890
[ 27.259945][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 27.260128][ T12] ? cleanup_net+0x2d6/0x8b0
[ 27.260333][ T12] cleanup_net+0x3b2/0x8b0
[ 27.260510][ T12] ? net_passive_dec+0x190/0x190
[ 27.260702][ T12] ? rcu_is_watching+0x12/0xb0
[ 27.260885][ T12] process_one_work+0xe35/0x1650
[ 27.261071][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 27.261266][ T12] ? assign_work+0x168/0x240
[ 27.261440][ T12] worker_thread+0x591/0xcf0
[ 27.261626][ T12] ? rescuer_thread+0xd10/0xd10
[ 27.261795][ T12] kthread+0x37b/0x5f0
[ 27.261934][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.262117][ T12] ? ret_from_fork+0x1b/0x270
[ 27.262309][ T12] ? __lock_release+0x5d/0x170
[ 27.262483][ T12] ? rcu_is_watching+0x12/0xb0
[ 27.262680][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.262863][ T12] ret_from_fork+0x1db/0x270
[ 27.263045][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.263227][ T12] ret_from_fork_asm+0x11/0x20
[ 27.263416][ T12]
[ 27.263548][ T12] irq event stamp: 8955
[ 27.263693][ T12] hardirqs last enabled at (8955): [] finish_task_switch.isra.0+0x245/0x960
[ 27.264054][ T12] hardirqs last disabled at (8954): [] __schedule+0x94a/0x1b10
[ 27.264373][ T12] softirqs last enabled at (8580): [] handle_softirqs+0x352/0x610
[ 27.264730][ T12] softirqs last disabled at (8571): [] irq_exit_rcu+0xab/0x100
[ 27.265054][ T12] ---[ end trace 0000000000000000 ]---