[ 21.173212][ T261] ip (261) used greatest stack depth: 24688 bytes left
[ 23.567963][ T283] ip_local_port_range: prefer different parity for start/end values.
[ 30.140453][ T12] ==================================================================
[ 30.140750][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 30.141056][ T12] Read of size 1 at addr ffff8880082e16ac by task kworker/u16:0/12
[ 30.141351][ T12]
[ 30.141444][ T12] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 30.141451][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 30.141455][ T12] Workqueue: netns cleanup_net
[ 30.141468][ T12] Call Trace:
[ 30.141472][ T12]
[ 30.141474][ T12] dump_stack_lvl+0x82/0xc0
[ 30.141482][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 30.141498][ T12] ? kobject_put+0xbb/0xd0
[ 30.141503][ T12] print_report+0xb4/0x270
[ 30.141506][ T12] ? kobject_put+0xbb/0xd0
[ 30.141510][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 30.141513][ T12] ? kobject_put+0xbb/0xd0
[ 30.141516][ T12] kasan_report+0xca/0x100
[ 30.141521][ T12] ? kobject_put+0xbb/0xd0
[ 30.141527][ T12] kobject_put+0xbb/0xd0
[ 30.141530][ T12] netdev_run_todo+0x5f0/0xc60
[ 30.141537][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 30.141540][ T12] ? generic_xdp_install+0x410/0x410
[ 30.141547][ T12] ops_undo_list+0x714/0x890
[ 30.141558][ T12] ? netns_get+0x110/0x110
[ 30.141561][ T12] ? cleanup_net+0x2d6/0x830
[ 30.141566][ T12] cleanup_net+0x3b2/0x830
[ 30.141569][ T12] ? net_passive_dec+0x190/0x190
[ 30.141573][ T12] ? rcu_is_watching+0x12/0xb0
[ 30.141585][ T12] process_one_work+0xe35/0x1650
[ 30.141597][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 30.141603][ T12] ? assign_work+0x168/0x240
[ 30.141607][ T12] worker_thread+0x591/0xcf0
[ 30.141613][ T12] ? rescuer_thread+0xd10/0xd10
[ 30.141616][ T12] kthread+0x37b/0x5f0
[ 30.141621][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 30.141624][ T12] ? ret_from_fork+0x1b/0x270
[ 30.141639][ T12] ? __lock_release+0x5d/0x170
[ 30.141649][ T12] ? rcu_is_watching+0x12/0xb0
[ 30.141652][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 30.141655][ T12] ret_from_fork+0x1db/0x270
[ 30.141659][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 30.141662][ T12] ret_from_fork_asm+0x11/0x20
[ 30.141675][ T12]
[ 30.141677][ T12]
[ 30.148251][ T12] Allocated by task 252:
[ 30.148371][ T12] kasan_save_stack+0x24/0x40
[ 30.148540][ T12] kasan_save_track+0x14/0x30
[ 30.148712][ T12] __kasan_kmalloc+0x7b/0x90
[ 30.148891][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 30.149070][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 30.149261][ T12] sit_init_net+0x169/0x550
[ 30.149429][ T12] ops_init+0x189/0x550
[ 30.149555][ T12] setup_net+0xf1/0x380
[ 30.149685][ T12] copy_net_ns+0x21a/0x380
[ 30.149875][ T12] create_new_namespaces+0x35f/0x900
[ 30.150037][ T12] unshare_nsproxy_namespaces+0x89/0x120
[ 30.150211][ T12] ksys_unshare+0x2a3/0x660
[ 30.150376][ T12] __x64_sys_unshare+0x31/0x40
[ 30.150569][ T12] do_syscall_64+0xc1/0xfd0
[ 30.150744][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 30.150980][ T12]
[ 30.151068][ T12] Freed by task 12:
[ 30.151212][ T12] kasan_save_stack+0x24/0x40
[ 30.151392][ T12] kasan_save_track+0x14/0x30
[ 30.151568][ T12] __kasan_save_free_info+0x3b/0x60
[ 30.151740][ T12] __kasan_slab_free+0x3f/0x60
[ 30.151937][ T12] kfree+0x21d/0x540
[ 30.152069][ T12] device_release+0x9c/0x210
[ 30.152279][ T12] kobject_cleanup+0xfe/0x360
[ 30.152454][ T12] netdev_run_todo+0x81f/0xc60
[ 30.152634][ T12] ops_undo_list+0x714/0x890
[ 30.152809][ T12] cleanup_net+0x3b2/0x830
[ 30.152981][ T12] process_one_work+0xe35/0x1650
[ 30.153163][ T12] worker_thread+0x591/0xcf0
[ 30.153349][ T12] kthread+0x37b/0x5f0
[ 30.153478][ T12] ret_from_fork+0x1db/0x270
[ 30.153653][ T12] ret_from_fork_asm+0x11/0x20
[ 30.153834][ T12]
[ 30.153925][ T12] The buggy address belongs to the object at ffff8880082e1000
[ 30.153925][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 30.154349][ T12] The buggy address is located 1708 bytes inside of
[ 30.154349][ T12] freed 4096-byte region [ffff8880082e1000, ffff8880082e2000)
[ 30.154762][ T12]
[ 30.154854][ T12] The buggy address belongs to the physical page:
[ 30.155068][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x82e0
[ 30.155372][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 30.155608][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 30.155829][ T12] page_type: f5(slab)
[ 30.155957][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000202410 ffffea000020bc10
[ 30.156264][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 30.156537][ T12] head: 0080000000000040 ffff888001043700 ffffea0000202410 ffffea000020bc10
[ 30.156815][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 30.157104][ T12] head: 0080000000000003 ffffea000020b801 00000000ffffffff 00000000ffffffff
[ 30.157419][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 30.157702][ T12] page dumped because: kasan: bad access detected
[ 30.157893][ T12]
[ 30.157971][ T12] Memory state around the buggy address:
[ 30.158120][ T12] ffff8880082e1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 30.158367][ T12] ffff8880082e1600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 30.158592][ T12] >ffff8880082e1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 30.158824][ T12] ^
[ 30.158979][ T12] ffff8880082e1700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 30.159218][ T12] ffff8880082e1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 30.159468][ T12] ==================================================================
[ 30.159773][ T12] Disabling lock debugging due to kernel taint
[ 30.160009][ T12] ------------[ cut here ]------------
[ 30.160179][ T12] refcount_t: underflow; use-after-free.
[ 30.160444][ T12] WARNING: CPU: 2 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 30.160768][ T12] Modules linked in: nf_conntrack_netlink xt_REDIRECT tcp_diag inet_diag nft_chain_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xt_tcpudp nft_compat nf_tables x_tables veth
[ 30.161349][ T12] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 30.161723][ T12] Tainted: [B]=BAD_PAGE
[ 30.161888][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 30.162103][ T12] Workqueue: netns cleanup_net
[ 30.162297][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 30.162551][ 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 25 90 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
[ 30.163136][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 30.163377][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 30.163631][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 30.163899][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff217e220
[ 30.164161][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 30.164422][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 30.164677][ T12] FS: 0000000000000000(0000) GS:ffff88809e6ec000(0000) knlGS:0000000000000000
[ 30.164978][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 30.165195][ T12] CR2: 00000000004061e9 CR3: 000000003b535002 CR4: 0000000000772ef0
[ 30.165456][ T12] PKRU: 55555554
[ 30.165593][ T12] Call Trace:
[ 30.165738][ T12]
[ 30.165844][ T12] netdev_run_todo+0x5f0/0xc60
[ 30.166026][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 30.166203][ T12] ? generic_xdp_install+0x410/0x410
[ 30.166387][ T12] ops_undo_list+0x714/0x890
[ 30.166574][ T12] ? netns_get+0x110/0x110
[ 30.166766][ T12] ? cleanup_net+0x2d6/0x830
[ 30.166955][ T12] cleanup_net+0x3b2/0x830
[ 30.167150][ T12] ? net_passive_dec+0x190/0x190
[ 30.167341][ T12] ? rcu_is_watching+0x12/0xb0
[ 30.167516][ T12] process_one_work+0xe35/0x1650
[ 30.167698][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 30.167875][ T12] ? assign_work+0x168/0x240
[ 30.168059][ T12] worker_thread+0x591/0xcf0
[ 30.168242][ T12] ? rescuer_thread+0xd10/0xd10
[ 30.168421][ T12] kthread+0x37b/0x5f0
[ 30.168559][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 30.168739][ T12] ? ret_from_fork+0x1b/0x270
[ 30.168918][ T12] ? __lock_release+0x5d/0x170
[ 30.169095][ T12] ? rcu_is_watching+0x12/0xb0
[ 30.169280][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 30.169459][ T12] ret_from_fork+0x1db/0x270
[ 30.169634][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 30.169825][ T12] ret_from_fork_asm+0x11/0x20
[ 30.170008][ T12]
[ 30.170145][ T12] irq event stamp: 4447
[ 30.170298][ T12] hardirqs last enabled at (4447): [] __schedule+0x13c7/0x1b10
[ 30.170598][ T12] hardirqs last disabled at (4446): [] __schedule+0x94a/0x1b10
[ 30.170905][ T12] softirqs last enabled at (3846): [] handle_softirqs+0x352/0x610
[ 30.171200][ T12] softirqs last disabled at (3839): [] irq_exit_rcu+0xab/0x100
[ 30.171491][ T12] ---[ end trace 0000000000000000 ]---