[ 15.522132][ T71] ==================================================================
[ 15.522440][ T71] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 15.522702][ T71] Read of size 1 at addr ffff888007d696c4 by task kworker/u16:1/71
[ 15.522959][ T71]
[ 15.523050][ T71] CPU: 1 UID: 0 PID: 71 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 15.523056][ T71] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 15.523058][ T71] Workqueue: netns cleanup_net
[ 15.523071][ T71] Call Trace:
[ 15.523073][ T71]
[ 15.523075][ T71] dump_stack_lvl+0x82/0xc0
[ 15.523080][ T71] print_address_description.constprop.0+0x2c/0x3a0
[ 15.523089][ T71] ? kobject_put+0xbb/0xd0
[ 15.523093][ T71] print_report+0xb4/0x270
[ 15.523097][ T71] ? kobject_put+0xbb/0xd0
[ 15.523102][ T71] ? kasan_addr_to_slab+0x21/0x70
[ 15.523106][ T71] ? kobject_put+0xbb/0xd0
[ 15.523108][ T71] kasan_report+0xca/0x100
[ 15.523112][ T71] ? kobject_put+0xbb/0xd0
[ 15.523118][ T71] kobject_put+0xbb/0xd0
[ 15.523121][ T71] netdev_run_todo+0x5f0/0xc60
[ 15.523126][ T71] ? dev_ingress_queue_create+0x190/0x190
[ 15.523130][ T71] ? generic_xdp_install+0x410/0x410
[ 15.523132][ T71] ? net_generic+0xb1/0x1f0
[ 15.523143][ T71] ops_undo_list+0x714/0x890
[ 15.523148][ T71] ? rtnl_net_dumpid_one+0x270/0x270
[ 15.523151][ T71] ? cleanup_net+0x2d6/0x8b0
[ 15.523157][ T71] cleanup_net+0x3b2/0x8b0
[ 15.523161][ T71] ? net_passive_dec+0x190/0x190
[ 15.523166][ T71] ? rcu_is_watching+0x12/0xb0
[ 15.523173][ T71] process_one_work+0xe35/0x1650
[ 15.523184][ T71] ? pwq_dec_nr_in_flight+0x550/0x550
[ 15.523189][ T71] ? assign_work+0x168/0x240
[ 15.523194][ T71] worker_thread+0x591/0xcf0
[ 15.523199][ T71] ? rescuer_thread+0xd10/0xd10
[ 15.523203][ T71] kthread+0x37b/0x5f0
[ 15.523207][ T71] ? kthread_is_per_cpu+0xc0/0xc0
[ 15.523210][ T71] ? ret_from_fork+0x1b/0x270
[ 15.523216][ T71] ? __lock_release+0x5d/0x170
[ 15.523220][ T71] ? rcu_is_watching+0x12/0xb0
[ 15.523223][ T71] ? kthread_is_per_cpu+0xc0/0xc0
[ 15.523227][ T71] ret_from_fork+0x1db/0x270
[ 15.523230][ T71] ? kthread_is_per_cpu+0xc0/0xc0
[ 15.523233][ T71] ret_from_fork_asm+0x11/0x20
[ 15.523242][ T71]
[ 15.523243][ T71]
[ 15.530425][ T71] Allocated by task 263:
[ 15.530554][ T71] kasan_save_stack+0x24/0x40
[ 15.530726][ T71] kasan_save_track+0x14/0x30
[ 15.530894][ T71] __kasan_kmalloc+0x7b/0x90
[ 15.531149][ T71] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 15.531317][ T71] alloc_netdev_mqs+0x7d/0x1370
[ 15.531484][ T71] ip6_tnl_init_net+0x102/0x3f0
[ 15.531657][ T71] ops_init+0x189/0x550
[ 15.531879][ T71] setup_net+0xf1/0x380
[ 15.532006][ T71] copy_net_ns+0x253/0x510
[ 15.532178][ T71] create_new_namespaces+0x35f/0x900
[ 15.532352][ T71] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 15.532517][ T71] ksys_unshare+0x2be/0x6e0
[ 15.532770][ T71] __x64_sys_unshare+0x31/0x40
[ 15.532937][ T71] do_syscall_64+0xc1/0xfd0
[ 15.533108][ T71] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 15.533400][ T71]
[ 15.533487][ T71] Freed by task 71:
[ 15.533615][ T71] kasan_save_stack+0x24/0x40
[ 15.533782][ T71] kasan_save_track+0x14/0x30
[ 15.533958][ T71] __kasan_save_free_info+0x3b/0x60
[ 15.534212][ T71] __kasan_slab_free+0x3f/0x60
[ 15.534378][ T71] kfree+0x21d/0x540
[ 15.534504][ T71] device_release+0x9c/0x210
[ 15.534675][ T71] kobject_cleanup+0xfe/0x360
[ 15.534937][ T71] netdev_run_todo+0x81f/0xc60
[ 15.535130][ T71] ops_undo_list+0x714/0x890
[ 15.535296][ T71] cleanup_net+0x3b2/0x8b0
[ 15.535464][ T71] process_one_work+0xe35/0x1650
[ 15.535715][ T71] worker_thread+0x591/0xcf0
[ 15.535892][ T71] kthread+0x37b/0x5f0
[ 15.536018][ T71] ret_from_fork+0x1db/0x270
[ 15.536186][ T71] ret_from_fork_asm+0x11/0x20
[ 15.536352][ T71]
[ 15.536521][ T71] The buggy address belongs to the object at ffff888007d69000
[ 15.536521][ T71] which belongs to the cache kmalloc-4k of size 4096
[ 15.536928][ T71] The buggy address is located 1732 bytes inside of
[ 15.536928][ T71] freed 4096-byte region [ffff888007d69000, ffff888007d6a000)
[ 15.537413][ T71]
[ 15.537496][ T71] The buggy address belongs to the physical page:
[ 15.537707][ T71] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7d68
[ 15.538099][ T71] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 15.538351][ T71] flags: 0x80000000000040(head|node=0|zone=1)
[ 15.538568][ T71] page_type: f5(slab)
[ 15.538795][ T71] raw: 0080000000000040 ffff888001043700 ffffea0000203c10 ffffea000020b010
[ 15.539105][ T71] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 15.539400][ T71] head: 0080000000000040 ffff888001043700 ffffea0000203c10 ffffea000020b010
[ 15.539694][ T71] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 15.539998][ T71] head: 0080000000000003 ffffea00001f5a01 00000000ffffffff 00000000ffffffff
[ 15.540384][ T71] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 15.540676][ T71] page dumped because: kasan: bad access detected
[ 15.540975][ T71]
[ 15.541056][ T71] Memory state around the buggy address:
[ 15.541216][ T71] ffff888007d69580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 15.541456][ T71] ffff888007d69600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 15.541778][ T71] >ffff888007d69680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 15.542028][ T71] ^
[ 15.542231][ T71] ffff888007d69700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 15.542552][ T71] ffff888007d69780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 15.542795][ T71] ==================================================================
[ 15.543273][ T71] Disabling lock debugging due to kernel taint
[ 15.543544][ T71] ------------[ cut here ]------------
[ 15.543724][ T71] refcount_t: underflow; use-after-free.
[ 15.543937][ T71] WARNING: CPU: 2 PID: 71 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 15.544250][ T71] Modules linked in:
[ 15.544406][ T71] CPU: 2 UID: 0 PID: 71 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 15.544812][ T71] Tainted: [B]=BAD_PAGE
[ 15.544961][ T71] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 15.545184][ T71] Workqueue: netns cleanup_net
[ 15.545379][ T71] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 15.545639][ T71] 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 a5 88 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
[ 15.546235][ T71] RSP: 0018:ffffc900004c7a08 EFLAGS: 00010282
[ 15.546483][ T71] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 15.546754][ T71] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 15.547017][ T71] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff1340934
[ 15.547287][ T71] R10: 0000000000000003 R11: ffffc900004c7580 R12: 0000000000000001
[ 15.547571][ T71] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 15.547842][ T71] FS: 0000000000000000(0000) GS:ffff8880e2208000(0000) knlGS:0000000000000000
[ 15.548150][ T71] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 15.548383][ T71] CR2: 00007f4ccbaf1920 CR3: 000000000b302004 CR4: 0000000000772ef0
[ 15.548667][ T71] PKRU: 55555554
[ 15.548823][ T71] Call Trace:
[ 15.548969][ T71]
[ 15.549081][ T71] netdev_run_todo+0x5f0/0xc60
[ 15.549271][ T71] ? dev_ingress_queue_create+0x190/0x190
[ 15.549479][ T71] ? generic_xdp_install+0x410/0x410
[ 15.549663][ T71] ? net_generic+0xb1/0x1f0
[ 15.549849][ T71] ops_undo_list+0x714/0x890
[ 15.550036][ T71] ? rtnl_net_dumpid_one+0x270/0x270
[ 15.550222][ T71] ? cleanup_net+0x2d6/0x8b0
[ 15.550418][ T71] cleanup_net+0x3b2/0x8b0
[ 15.550615][ T71] ? net_passive_dec+0x190/0x190
[ 15.550803][ T71] ? rcu_is_watching+0x12/0xb0
[ 15.550989][ T71] process_one_work+0xe35/0x1650
[ 15.551177][ T71] ? pwq_dec_nr_in_flight+0x550/0x550
[ 15.551364][ T71] ? assign_work+0x168/0x240
[ 15.551569][ T71] worker_thread+0x591/0xcf0
[ 15.551759][ T71] ? rescuer_thread+0xd10/0xd10
[ 15.551948][ T71] kthread+0x37b/0x5f0
[ 15.552096][ T71] ? kthread_is_per_cpu+0xc0/0xc0
[ 15.552283][ T71] ? ret_from_fork+0x1b/0x270
[ 15.552486][ T71] ? __lock_release+0x5d/0x170
[ 15.552672][ T71] ? rcu_is_watching+0x12/0xb0
[ 15.552869][ T71] ? kthread_is_per_cpu+0xc0/0xc0
[ 15.553055][ T71] ret_from_fork+0x1db/0x270
[ 15.553243][ T71] ? kthread_is_per_cpu+0xc0/0xc0
[ 15.553445][ T71] ret_from_fork_asm+0x11/0x20
[ 15.553635][ T71]
[ 15.553781][ T71] irq event stamp: 14719
[ 15.553932][ T71] hardirqs last enabled at (14719): [] finish_task_switch.isra.0+0x245/0x960
[ 15.554278][ T71] hardirqs last disabled at (14718): [] __schedule+0x94a/0x1b10
[ 15.554597][ T71] softirqs last enabled at (14308): [] handle_softirqs+0x352/0x610
[ 15.554911][ T71] softirqs last disabled at (14299): [] irq_exit_rcu+0xab/0x100
[ 15.555216][ T71] ---[ end trace 0000000000000000 ]---
[ 17.251574][ T302] veth0: renamed from ioam-veth-alpha
[ 17.322972][ T303] veth0: renamed from ioam-veth-betaL
[ 17.393122][ T304] veth1: renamed from ioam-veth-betaR
[ 17.462977][ T305] veth0: renamed from ioam-veth-gamma