[ 57.670655][ T69] ==================================================================
[ 57.671107][ T69] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 57.671521][ T69] Read of size 1 at addr ffff8880082396ac by task kworker/u16:1/69
[ 57.671809][ T69]
[ 57.671897][ T69] CPU: 1 UID: 0 PID: 69 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 57.671902][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 57.671905][ T69] Workqueue: netns cleanup_net
[ 57.671912][ T69] Call Trace:
[ 57.671915][ T69]
[ 57.671917][ T69] dump_stack_lvl+0x82/0xc0
[ 57.671923][ T69] print_address_description.constprop.0+0x2c/0x3a0
[ 57.671932][ T69] ? kobject_put+0xbb/0xd0
[ 57.671936][ T69] print_report+0xb4/0x270
[ 57.671940][ T69] ? kobject_put+0xbb/0xd0
[ 57.671943][ T69] ? kasan_addr_to_slab+0x21/0x70
[ 57.671947][ T69] ? kobject_put+0xbb/0xd0
[ 57.671950][ T69] kasan_report+0xca/0x100
[ 57.671954][ T69] ? kobject_put+0xbb/0xd0
[ 57.671960][ T69] kobject_put+0xbb/0xd0
[ 57.671964][ T69] netdev_run_todo+0x5f0/0xc60
[ 57.671970][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 57.671974][ T69] ? generic_xdp_install+0x410/0x410
[ 57.671981][ T69] ops_undo_list+0x714/0x890
[ 57.671990][ T69] ? netns_get+0x110/0x110
[ 57.671993][ T69] ? cleanup_net+0x2d6/0x830
[ 57.671998][ T69] cleanup_net+0x3b2/0x830
[ 57.672001][ T69] ? net_passive_dec+0x190/0x190
[ 57.672005][ T69] ? rcu_is_watching+0x12/0xb0
[ 57.672012][ T69] process_one_work+0xe35/0x1650
[ 57.672022][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 57.672028][ T69] ? assign_work+0x168/0x240
[ 57.672032][ T69] worker_thread+0x591/0xcf0
[ 57.672037][ T69] ? rescuer_thread+0xd10/0xd10
[ 57.672041][ T69] kthread+0x37b/0x5f0
[ 57.672046][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 57.672049][ T69] ? ret_from_fork+0x1b/0x270
[ 57.672057][ T69] ? __lock_release+0x5d/0x170
[ 57.672064][ T69] ? rcu_is_watching+0x12/0xb0
[ 57.672067][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 57.672070][ T69] ret_from_fork+0x1db/0x270
[ 57.672073][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 57.672076][ T69] ret_from_fork_asm+0x11/0x20
[ 57.672086][ T69]
[ 57.672087][ T69]
[ 57.679804][ T69] Allocated by task 252:
[ 57.679924][ T69] kasan_save_stack+0x24/0x40
[ 57.680146][ T69] kasan_save_track+0x14/0x30
[ 57.680321][ T69] __kasan_kmalloc+0x7b/0x90
[ 57.680483][ T69] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 57.680661][ T69] alloc_netdev_mqs+0x7d/0x1370
[ 57.680833][ T69] sit_init_net+0x169/0x550
[ 57.681006][ T69] ops_init+0x189/0x550
[ 57.681132][ T69] setup_net+0xf1/0x380
[ 57.681252][ T69] copy_net_ns+0x21a/0x380
[ 57.681426][ T69] create_new_namespaces+0x35f/0x900
[ 57.681605][ T69] unshare_nsproxy_namespaces+0x89/0x120
[ 57.681766][ T69] ksys_unshare+0x2a3/0x660
[ 57.681930][ T69] __x64_sys_unshare+0x31/0x40
[ 57.682093][ T69] do_syscall_64+0xc1/0xfd0
[ 57.682258][ T69] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 57.682458][ T69]
[ 57.682553][ T69] Freed by task 69:
[ 57.682682][ T69] kasan_save_stack+0x24/0x40
[ 57.682848][ T69] kasan_save_track+0x14/0x30
[ 57.683102][ T69] __kasan_save_free_info+0x3b/0x60
[ 57.683263][ T69] __kasan_slab_free+0x3f/0x60
[ 57.683437][ T69] kfree+0x21d/0x540
[ 57.683572][ T69] device_release+0x9c/0x210
[ 57.683737][ T69] kobject_cleanup+0xfe/0x360
[ 57.683995][ T69] netdev_run_todo+0x81f/0xc60
[ 57.684153][ T69] ops_undo_list+0x714/0x890
[ 57.684311][ T69] cleanup_net+0x3b2/0x830
[ 57.684469][ T69] process_one_work+0xe35/0x1650
[ 57.684637][ T69] worker_thread+0x591/0xcf0
[ 57.684796][ T69] kthread+0x37b/0x5f0
[ 57.684920][ T69] ret_from_fork+0x1db/0x270
[ 57.685116][ T69] ret_from_fork_asm+0x11/0x20
[ 57.685377][ T69]
[ 57.685466][ T69] The buggy address belongs to the object at ffff888008239000
[ 57.685466][ T69] which belongs to the cache kmalloc-4k of size 4096
[ 57.685856][ T69] The buggy address is located 1708 bytes inside of
[ 57.685856][ T69] freed 4096-byte region [ffff888008239000, ffff88800823a000)
[ 57.686326][ T69]
[ 57.686430][ T69] The buggy address belongs to the physical page:
[ 57.686656][ T69] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8238
[ 57.687032][ T69] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 57.687270][ T69] flags: 0x80000000000040(head|node=0|zone=1)
[ 57.687576][ T69] page_type: f5(slab)
[ 57.687700][ T69] raw: 0080000000000040 ffff888001043700 ffffea0000200010 ffffea00001dfa10
[ 57.687994][ T69] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 57.688387][ T69] head: 0080000000000040 ffff888001043700 ffffea0000200010 ffffea00001dfa10
[ 57.688672][ T69] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 57.689080][ T69] head: 0080000000000003 ffffea0000208e01 00000000ffffffff 00000000ffffffff
[ 57.689388][ T69] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 57.689686][ T69] page dumped because: kasan: bad access detected
[ 57.689978][ T69]
[ 57.690068][ T69] Memory state around the buggy address:
[ 57.690231][ T69] ffff888008239580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 57.690464][ T69] ffff888008239600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 57.690704][ T69] >ffff888008239680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 57.690971][ T69] ^
[ 57.691144][ T69] ffff888008239700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 57.691477][ T69] ffff888008239780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 57.691732][ T69] ==================================================================
[ 57.692179][ T69] Disabling lock debugging due to kernel taint
[ 57.693082][ T69] ------------[ cut here ]------------
[ 57.693326][ T69] refcount_t: underflow; use-after-free.
[ 57.693597][ T69] WARNING: CPU: 2 PID: 69 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 57.694022][ T69] Modules linked in: inet_diag nft_tproxy nf_tproxy_ipv6 nf_tproxy_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_tables veth
[ 57.694509][ T69] CPU: 2 UID: 0 PID: 69 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 57.694919][ T69] Tainted: [B]=BAD_PAGE
[ 57.695079][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 57.695328][ T69] Workqueue: netns cleanup_net
[ 57.695578][ T69] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 57.695823][ T69] 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 45 97 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
[ 57.696513][ T69] RSP: 0000:ffffc900004a7a08 EFLAGS: 00010282
[ 57.696801][ T69] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 57.697098][ T69] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 57.697399][ T69] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff2fbe220
[ 57.697697][ T69] R10: 0000000000000003 R11: ffffc900004a7580 R12: 0000000000000001
[ 57.697971][ T69] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 57.698268][ T69] FS: 0000000000000000(0000) GS:ffff88809d0ec000(0000) knlGS:0000000000000000
[ 57.698710][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 57.698973][ T69] CR2: 00007fae29b14444 CR3: 000000002a335003 CR4: 0000000000772ef0
[ 57.699290][ T69] PKRU: 55555554
[ 57.699551][ T69] Call Trace:
[ 57.699715][ T69]
[ 57.699830][ T69] netdev_run_todo+0x5f0/0xc60
[ 57.700043][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 57.700269][ T69] ? generic_xdp_install+0x410/0x410
[ 57.700573][ T69] ops_undo_list+0x714/0x890
[ 57.700778][ T69] ? netns_get+0x110/0x110
[ 57.700967][ T69] ? cleanup_net+0x2d6/0x830
[ 57.701187][ T69] cleanup_net+0x3b2/0x830
[ 57.701476][ T69] ? net_passive_dec+0x190/0x190
[ 57.701682][ T69] ? rcu_is_watching+0x12/0xb0
[ 57.701876][ T69] process_one_work+0xe35/0x1650
[ 57.702080][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 57.702291][ T69] ? assign_work+0x168/0x240
[ 57.702503][ T69] worker_thread+0x591/0xcf0
[ 57.702705][ T69] ? rescuer_thread+0xd10/0xd10
[ 57.702916][ T69] kthread+0x37b/0x5f0
[ 57.703078][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 57.703271][ T69] ? ret_from_fork+0x1b/0x270
[ 57.703460][ T69] ? __lock_release+0x5d/0x170
[ 57.703676][ T69] ? rcu_is_watching+0x12/0xb0
[ 57.703880][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 57.704069][ T69] ret_from_fork+0x1db/0x270
[ 57.704257][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 57.704434][ T69] ret_from_fork_asm+0x11/0x20
[ 57.704679][ T69]
[ 57.704852][ T69] irq event stamp: 8939
[ 57.704994][ T69] hardirqs last enabled at (8939): [] finish_task_switch.isra.0+0x245/0x960
[ 57.705465][ T69] hardirqs last disabled at (8938): [] __schedule+0x94a/0x1b10
[ 57.706111][ T69] softirqs last enabled at (8770): [] handle_softirqs+0x352/0x610
[ 57.706444][ T69] softirqs last disabled at (8761): [] irq_exit_rcu+0xab/0x100
[ 57.706787][ T69] ---[ end trace 0000000000000000 ]---