[ 17.724007][ T265] ip (265) used greatest stack depth: 23672 bytes left
[ 23.018217][ T70] ==================================================================
[ 23.018601][ T70] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 23.018958][ T70] Read of size 1 at addr ffff888007e716c4 by task kworker/u16:1/70
[ 23.019300][ T70]
[ 23.019440][ T70] CPU: 0 UID: 0 PID: 70 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 23.019448][ T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 23.019452][ T70] Workqueue: netns cleanup_net
[ 23.019465][ T70] Call Trace:
[ 23.019469][ T70]
[ 23.019473][ T70] dump_stack_lvl+0x82/0xc0
[ 23.019483][ T70] print_address_description.constprop.0+0x2c/0x3a0
[ 23.019494][ T70] ? kobject_put+0xbb/0xd0
[ 23.019500][ T70] print_report+0xb4/0x270
[ 23.019504][ T70] ? kobject_put+0xbb/0xd0
[ 23.019509][ T70] ? kasan_addr_to_slab+0x21/0x70
[ 23.019514][ T70] ? kobject_put+0xbb/0xd0
[ 23.019518][ T70] kasan_report+0xca/0x100
[ 23.019522][ T70] ? kobject_put+0xbb/0xd0
[ 23.019527][ T70] kobject_put+0xbb/0xd0
[ 23.019531][ T70] netdev_run_todo+0x5f0/0xc60
[ 23.019538][ T70] ? dev_ingress_queue_create+0x190/0x190
[ 23.019542][ T70] ? generic_xdp_install+0x410/0x410
[ 23.019545][ T70] ? net_generic+0xb1/0x1f0
[ 23.019555][ T70] ops_undo_list+0x714/0x890
[ 23.019561][ T70] ? rtnl_net_dumpid_one+0x270/0x270
[ 23.019564][ T70] ? cleanup_net+0x2d6/0x8b0
[ 23.019570][ T70] cleanup_net+0x3b2/0x8b0
[ 23.019574][ T70] ? net_passive_dec+0x190/0x190
[ 23.019579][ T70] ? rcu_is_watching+0x12/0xb0
[ 23.019588][ T70] process_one_work+0xe35/0x1650
[ 23.019599][ T70] ? pwq_dec_nr_in_flight+0x550/0x550
[ 23.019605][ T70] ? assign_work+0x168/0x240
[ 23.019609][ T70] worker_thread+0x591/0xcf0
[ 23.019615][ T70] ? rescuer_thread+0xd10/0xd10
[ 23.019619][ T70] kthread+0x37b/0x5f0
[ 23.019623][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.019626][ T70] ? ret_from_fork+0x1b/0x270
[ 23.019632][ T70] ? __lock_release+0x5d/0x170
[ 23.019637][ T70] ? rcu_is_watching+0x12/0xb0
[ 23.019640][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.019644][ T70] ret_from_fork+0x1db/0x270
[ 23.019646][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.019649][ T70] ret_from_fork_asm+0x11/0x20
[ 23.019661][ T70]
[ 23.019663][ T70]
[ 23.026973][ T70] Allocated by task 264:
[ 23.027114][ T70] kasan_save_stack+0x24/0x40
[ 23.027336][ T70] kasan_save_track+0x14/0x30
[ 23.027527][ T70] __kasan_kmalloc+0x7b/0x90
[ 23.027697][ T70] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 23.027874][ T70] alloc_netdev_mqs+0x7d/0x1370
[ 23.028049][ T70] ip6_tnl_init_net+0x102/0x3f0
[ 23.028268][ T70] ops_init+0x189/0x550
[ 23.028460][ T70] setup_net+0xf1/0x380
[ 23.028640][ T70] copy_net_ns+0x253/0x510
[ 23.028872][ T70] create_new_namespaces+0x35f/0x900
[ 23.029104][ T70] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 23.029367][ T70] ksys_unshare+0x2be/0x6e0
[ 23.029576][ T70] __x64_sys_unshare+0x31/0x40
[ 23.029804][ T70] do_syscall_64+0xc1/0xfd0
[ 23.029991][ T70] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 23.030261][ T70]
[ 23.030371][ T70] Freed by task 70:
[ 23.030502][ T70] kasan_save_stack+0x24/0x40
[ 23.030674][ T70] kasan_save_track+0x14/0x30
[ 23.030939][ T70] __kasan_save_free_info+0x3b/0x60
[ 23.031121][ T70] __kasan_slab_free+0x3f/0x60
[ 23.031305][ T70] kfree+0x21d/0x540
[ 23.031499][ T70] device_release+0x9c/0x210
[ 23.031689][ T70] kobject_cleanup+0xfe/0x360
[ 23.031861][ T70] netdev_run_todo+0x81f/0xc60
[ 23.032034][ T70] ops_undo_list+0x714/0x890
[ 23.032224][ T70] cleanup_net+0x3b2/0x8b0
[ 23.032396][ T70] process_one_work+0xe35/0x1650
[ 23.032566][ T70] worker_thread+0x591/0xcf0
[ 23.032742][ T70] kthread+0x37b/0x5f0
[ 23.032890][ T70] ret_from_fork+0x1db/0x270
[ 23.033080][ T70] ret_from_fork_asm+0x11/0x20
[ 23.033493][ T70]
[ 23.033615][ T70] The buggy address belongs to the object at ffff888007e71000
[ 23.033615][ T70] which belongs to the cache kmalloc-4k of size 4096
[ 23.034187][ T70] The buggy address is located 1732 bytes inside of
[ 23.034187][ T70] freed 4096-byte region [ffff888007e71000, ffff888007e72000)
[ 23.034723][ T70]
[ 23.034826][ T70] The buggy address belongs to the physical page:
[ 23.035134][ T70] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e70
[ 23.035443][ T70] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 23.035739][ T70] flags: 0x80000000000040(head|node=0|zone=1)
[ 23.036035][ T70] page_type: f5(slab)
[ 23.036196][ T70] raw: 0080000000000040 ffff888001043700 ffffea0000175210 ffffea000021f010
[ 23.036558][ T70] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 23.037005][ T70] head: 0080000000000040 ffff888001043700 ffffea0000175210 ffffea000021f010
[ 23.037377][ T70] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 23.037876][ T70] head: 0080000000000003 ffffea00001f9c01 00000000ffffffff 00000000ffffffff
[ 23.038241][ T70] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 23.038561][ T70] page dumped because: kasan: bad access detected
[ 23.038950][ T70]
[ 23.039038][ T70] Memory state around the buggy address:
[ 23.039221][ T70] ffff888007e71580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 23.039544][ T70] ffff888007e71600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 23.039794][ T70] >ffff888007e71680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 23.040038][ T70] ^
[ 23.040545][ T70] ffff888007e71700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 23.040832][ T70] ffff888007e71780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 23.041100][ T70] ==================================================================
[ 23.041501][ T70] Disabling lock debugging due to kernel taint
[ 23.041808][ T70] ------------[ cut here ]------------
[ 23.042003][ T70] refcount_t: underflow; use-after-free.
[ 23.042232][ T70] WARNING: CPU: 1 PID: 70 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 23.043221][ T70] Modules linked in:
[ 23.043510][ T70] CPU: 1 UID: 0 PID: 70 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 23.043920][ T70] Tainted: [B]=BAD_PAGE
[ 23.044063][ T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 23.044330][ T70] Workqueue: netns cleanup_net
[ 23.044560][ T70] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 23.044805][ 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 c5 87 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
[ 23.045519][ T70] RSP: 0018:ffffc900004b7a08 EFLAGS: 00010282
[ 23.045788][ T70] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 23.046090][ T70] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 23.046387][ T70] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff1180934
[ 23.046648][ T70] R10: 0000000000000003 R11: ffffc900004b7580 R12: 0000000000000001
[ 23.046930][ T70] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 23.047201][ T70] FS: 0000000000000000(0000) GS:ffff8880e2f88000(0000) knlGS:0000000000000000
[ 23.047598][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 23.047834][ T70] CR2: 00007ff90615c000 CR3: 0000000030d49002 CR4: 0000000000772ef0
[ 23.048098][ T70] PKRU: 55555554
[ 23.048247][ T70] Call Trace:
[ 23.048403][ T70]
[ 23.048500][ T70] netdev_run_todo+0x5f0/0xc60
[ 23.048697][ T70] ? dev_ingress_queue_create+0x190/0x190
[ 23.048913][ T70] ? generic_xdp_install+0x410/0x410
[ 23.049088][ T70] ? net_generic+0xb1/0x1f0
[ 23.049281][ T70] ops_undo_list+0x714/0x890
[ 23.049514][ T70] ? rtnl_net_dumpid_one+0x270/0x270
[ 23.049745][ T70] ? cleanup_net+0x2d6/0x8b0
[ 23.049950][ T70] cleanup_net+0x3b2/0x8b0
[ 23.050130][ T70] ? net_passive_dec+0x190/0x190
[ 23.050345][ T70] ? rcu_is_watching+0x12/0xb0
[ 23.050556][ T70] process_one_work+0xe35/0x1650
[ 23.050758][ T70] ? pwq_dec_nr_in_flight+0x550/0x550
[ 23.050941][ T70] ? assign_work+0x168/0x240
[ 23.051129][ T70] worker_thread+0x591/0xcf0
[ 23.051331][ T70] ? rescuer_thread+0xd10/0xd10
[ 23.051581][ T70] kthread+0x37b/0x5f0
[ 23.051734][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.051921][ T70] ? ret_from_fork+0x1b/0x270
[ 23.052116][ T70] ? __lock_release+0x5d/0x170
[ 23.052285][ T70] ? rcu_is_watching+0x12/0xb0
[ 23.052470][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.052635][ T70] ret_from_fork+0x1db/0x270
[ 23.052821][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.053000][ T70] ret_from_fork_asm+0x11/0x20
[ 23.053167][ T70]
[ 23.053298][ T70] irq event stamp: 10615
[ 23.053425][ T70] hardirqs last enabled at (10615): [] finish_task_switch.isra.0+0x245/0x960
[ 23.053758][ T70] hardirqs last disabled at (10614): [] __schedule+0x94a/0x1b10
[ 23.054039][ T70] softirqs last enabled at (9530): [] unregister_netdevice_many_notify+0x714/0x1c90
[ 23.054369][ T70] softirqs last disabled at (9528): [] dev_mc_flush+0x54/0x90
[ 23.054642][ T70] ---[ end trace 0000000000000000 ]---
[ 39.514186][ T434] GACT probability NOT on