[ 87.680660][ T70] ==================================================================
[ 87.681120][ T70] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 87.681530][ T70] Read of size 1 at addr ffff8880077416c4 by task kworker/u16:1/70
[ 87.681922][ T70]
[ 87.682067][ T70] CPU: 2 UID: 0 PID: 70 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 87.682075][ T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 87.682079][ T70] Workqueue: netns cleanup_net
[ 87.682091][ T70] Call Trace:
[ 87.682095][ T70]
[ 87.682099][ T70] dump_stack_lvl+0x82/0xc0
[ 87.682107][ T70] print_address_description.constprop.0+0x2c/0x3a0
[ 87.682118][ T70] ? kobject_put+0xbb/0xd0
[ 87.682125][ T70] print_report+0xb4/0x270
[ 87.682130][ T70] ? kobject_put+0xbb/0xd0
[ 87.682136][ T70] ? kasan_addr_to_slab+0x21/0x70
[ 87.682142][ T70] ? kobject_put+0xbb/0xd0
[ 87.682147][ T70] kasan_report+0xca/0x100
[ 87.682154][ T70] ? kobject_put+0xbb/0xd0
[ 87.682164][ T70] kobject_put+0xbb/0xd0
[ 87.682170][ T70] netdev_run_todo+0x5f0/0xc60
[ 87.682179][ T70] ? dev_ingress_queue_create+0x190/0x190
[ 87.682185][ T70] ? generic_xdp_install+0x410/0x410
[ 87.682190][ T70] ? net_generic+0xb1/0x1f0
[ 87.682205][ T70] ops_undo_list+0x714/0x890
[ 87.682215][ T70] ? rtnl_net_dumpid_one+0x270/0x270
[ 87.682220][ T70] ? cleanup_net+0x2d6/0x8b0
[ 87.682231][ T70] cleanup_net+0x3b2/0x8b0
[ 87.682238][ T70] ? net_passive_dec+0x190/0x190
[ 87.682246][ T70] ? rcu_is_watching+0x12/0xb0
[ 87.682258][ T70] process_one_work+0xe35/0x1650
[ 87.682271][ T70] ? pwq_dec_nr_in_flight+0x550/0x550
[ 87.682282][ T70] ? assign_work+0x168/0x240
[ 87.682290][ T70] worker_thread+0x591/0xcf0
[ 87.682301][ T70] ? rescuer_thread+0xd10/0xd10
[ 87.682307][ T70] kthread+0x37b/0x5f0
[ 87.682313][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 87.682318][ T70] ? ret_from_fork+0x1b/0x270
[ 87.682324][ T70] ? __lock_release+0x5d/0x170
[ 87.682329][ T70] ? rcu_is_watching+0x12/0xb0
[ 87.682335][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 87.682341][ T70] ret_from_fork+0x1db/0x270
[ 87.682346][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 87.682351][ T70] ret_from_fork_asm+0x11/0x20
[ 87.682368][ T70]
[ 87.682371][ T70]
[ 87.692896][ T70] Allocated by task 332:
[ 87.693106][ T70] kasan_save_stack+0x24/0x40
[ 87.693403][ T70] kasan_save_track+0x14/0x30
[ 87.693678][ T70] __kasan_kmalloc+0x7b/0x90
[ 87.693963][ T70] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 87.694250][ T70] alloc_netdev_mqs+0x7d/0x1370
[ 87.694532][ T70] ip6_tnl_init_net+0x102/0x3f0
[ 87.694738][ T70] ops_init+0x189/0x550
[ 87.694871][ T70] setup_net+0xf1/0x380
[ 87.695000][ T70] copy_net_ns+0x253/0x510
[ 87.695179][ T70] create_new_namespaces+0x35f/0x900
[ 87.695374][ T70] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 87.695543][ T70] ksys_unshare+0x2be/0x6e0
[ 87.695722][ T70] __x64_sys_unshare+0x31/0x40
[ 87.695898][ T70] do_syscall_64+0xc1/0xfd0
[ 87.696071][ T70] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 87.696293][ T70]
[ 87.696389][ T70] Freed by task 70:
[ 87.696512][ T70] kasan_save_stack+0x24/0x40
[ 87.696700][ T70] kasan_save_track+0x14/0x30
[ 87.696867][ T70] __kasan_save_free_info+0x3b/0x60
[ 87.697050][ T70] __kasan_slab_free+0x3f/0x60
[ 87.697232][ T70] kfree+0x21d/0x540
[ 87.697376][ T70] device_release+0x9c/0x210
[ 87.697550][ T70] kobject_cleanup+0xfe/0x360
[ 87.697727][ T70] netdev_run_todo+0x81f/0xc60
[ 87.697903][ T70] ops_undo_list+0x714/0x890
[ 87.698108][ T70] cleanup_net+0x3b2/0x8b0
[ 87.698286][ T70] process_one_work+0xe35/0x1650
[ 87.698558][ T70] worker_thread+0x591/0xcf0
[ 87.698840][ T70] kthread+0x37b/0x5f0
[ 87.699054][ T70] ret_from_fork+0x1db/0x270
[ 87.699337][ T70] ret_from_fork_asm+0x11/0x20
[ 87.699619][ T70]
[ 87.699763][ T70] The buggy address belongs to the object at ffff888007741000
[ 87.699763][ T70] which belongs to the cache kmalloc-4k of size 4096
[ 87.700440][ T70] The buggy address is located 1732 bytes inside of
[ 87.700440][ T70] freed 4096-byte region [ffff888007741000, ffff888007742000)
[ 87.701158][ T70]
[ 87.701305][ T70] The buggy address belongs to the physical page:
[ 87.701652][ T70] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7740
[ 87.702146][ T70] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 87.702541][ T70] flags: 0x80000000000040(head|node=0|zone=1)
[ 87.702759][ T70] page_type: f5(slab)
[ 87.702903][ T70] raw: 0080000000000040 ffff888001043700 ffffea000022c810 ffffea000028d010
[ 87.703215][ T70] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 87.703516][ T70] head: 0080000000000040 ffff888001043700 ffffea000022c810 ffffea000028d010
[ 87.703820][ T70] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 87.704139][ T70] head: 0080000000000003 ffffea00001dd001 00000000ffffffff 00000000ffffffff
[ 87.704449][ T70] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 87.704852][ T70] page dumped because: kasan: bad access detected
[ 87.705076][ T70]
[ 87.705161][ T70] Memory state around the buggy address:
[ 87.705336][ T70] ffff888007741580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 87.705672][ T70] ffff888007741600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 87.705919][ T70] >ffff888007741680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 87.706251][ T70] ^
[ 87.706537][ T70] ffff888007741700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 87.706969][ T70] ffff888007741780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 87.707388][ T70] ==================================================================
[ 87.707803][ T70] Disabling lock debugging due to kernel taint
[ 87.708086][ T70] ------------[ cut here ]------------
[ 87.708319][ T70] refcount_t: underflow; use-after-free.
[ 87.708574][ T70] WARNING: CPU: 0 PID: 70 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 87.709466][ T70] Modules linked in: xt_conntrack nf_conntrack nf_defrag_ipv4 nft_compat nf_tables nf_defrag_ipv6
[ 87.710011][ T70] CPU: 0 UID: 0 PID: 70 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 87.710615][ T70] Tainted: [B]=BAD_PAGE
[ 87.710838][ T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 87.711161][ T70] Workqueue: netns cleanup_net
[ 87.711440][ T70] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 87.711822][ T70] 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 25 b1 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
[ 87.712728][ T70] RSP: 0018:ffffc900004b7a08 EFLAGS: 00010282
[ 87.713081][ T70] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 87.713474][ T70] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 87.713809][ T70] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff6440934
[ 87.714182][ T70] R10: 0000000000000003 R11: ffffc900004b7580 R12: 0000000000000001
[ 87.714560][ T70] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 87.714928][ T70] FS: 0000000000000000(0000) GS:ffff8880b3508000(0000) knlGS:0000000000000000
[ 87.715377][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 87.715693][ T70] CR2: 00007f769e04d840 CR3: 0000000078d49004 CR4: 0000000000772ef0
[ 87.716098][ T70] PKRU: 55555554
[ 87.716302][ T70] Call Trace:
[ 87.716495][ T70]
[ 87.716626][ T70] netdev_run_todo+0x5f0/0xc60
[ 87.716904][ T70] ? dev_ingress_queue_create+0x190/0x190
[ 87.717178][ T70] ? generic_xdp_install+0x410/0x410
[ 87.717603][ T70] ? net_generic+0xb1/0x1f0
[ 87.717884][ T70] ops_undo_list+0x714/0x890
[ 87.718341][ T70] ? rtnl_net_dumpid_one+0x270/0x270
[ 87.718598][ T70] ? cleanup_net+0x2d6/0x8b0
[ 87.718865][ T70] cleanup_net+0x3b2/0x8b0
[ 87.719283][ T70] ? net_passive_dec+0x190/0x190
[ 87.719878][ T70] ? rcu_is_watching+0x12/0xb0
[ 87.720128][ T70] process_one_work+0xe35/0x1650
[ 87.720389][ T70] ? pwq_dec_nr_in_flight+0x550/0x550
[ 87.720649][ T70] ? assign_work+0x168/0x240
[ 87.720924][ T70] worker_thread+0x591/0xcf0
[ 87.721190][ T70] ? rescuer_thread+0xd10/0xd10
[ 87.721447][ T70] kthread+0x37b/0x5f0
[ 87.721643][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 87.722001][ T70] ? ret_from_fork+0x1b/0x270
[ 87.722271][ T70] ? __lock_release+0x5d/0x170
[ 87.722530][ T70] ? rcu_is_watching+0x12/0xb0
[ 87.722797][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 87.723251][ T70] ret_from_fork+0x1db/0x270
[ 87.723512][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 87.723782][ T70] ret_from_fork_asm+0x11/0x20
[ 87.723995][ T70]
[ 87.724356][ T70] irq event stamp: 10281
[ 87.724520][ T70] hardirqs last enabled at (10281): [] finish_task_switch.isra.0+0x245/0x960
[ 87.725316][ T70] hardirqs last disabled at (10280): [] __schedule+0x94a/0x1b10
[ 87.725757][ T70] softirqs last enabled at (9886): [] handle_softirqs+0x352/0x610
[ 87.726388][ T70] softirqs last disabled at (9693): [] irq_exit_rcu+0xab/0x100
[ 87.727261][ T70] ---[ end trace 0000000000000000 ]---