[ 16.929287][ T292] veth0: renamed from veth-rt-1
[ 18.141918][ T301] veth0: renamed from veth-rt-2
[ 97.015810][ T12] ==================================================================
[ 97.016096][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 97.016349][ T12] Read of size 1 at addr ffff888008ba96c4 by task kworker/u16:0/12
[ 97.016580][ T12]
[ 97.016665][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 97.016670][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 97.016673][ T12] Workqueue: netns cleanup_net
[ 97.016684][ T12] Call Trace:
[ 97.016686][ T12]
[ 97.016690][ T12] dump_stack_lvl+0x82/0xc0
[ 97.016699][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 97.016708][ T12] ? kobject_put+0xbb/0xd0
[ 97.016712][ T12] print_report+0xb4/0x270
[ 97.016715][ T12] ? kobject_put+0xbb/0xd0
[ 97.016718][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 97.016722][ T12] ? kobject_put+0xbb/0xd0
[ 97.016725][ T12] kasan_report+0xca/0x100
[ 97.016728][ T12] ? kobject_put+0xbb/0xd0
[ 97.016734][ T12] kobject_put+0xbb/0xd0
[ 97.016737][ T12] netdev_run_todo+0x5f0/0xc60
[ 97.016744][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 97.016747][ T12] ? generic_xdp_install+0x410/0x410
[ 97.016750][ T12] ? net_generic+0xb1/0x1f0
[ 97.016759][ T12] ops_undo_list+0x714/0x890
[ 97.016765][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 97.016768][ T12] ? cleanup_net+0x2d6/0x8b0
[ 97.016774][ T12] cleanup_net+0x3b2/0x8b0
[ 97.016778][ T12] ? net_passive_dec+0x190/0x190
[ 97.016783][ T12] ? rcu_is_watching+0x12/0xb0
[ 97.016791][ T12] process_one_work+0xe35/0x1650
[ 97.016801][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 97.016807][ T12] ? assign_work+0x168/0x240
[ 97.016812][ T12] worker_thread+0x591/0xcf0
[ 97.016817][ T12] ? rescuer_thread+0xd10/0xd10
[ 97.016821][ T12] kthread+0x37b/0x5f0
[ 97.016825][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 97.016828][ T12] ? ret_from_fork+0x1b/0x270
[ 97.016834][ T12] ? __lock_release+0x5d/0x170
[ 97.016839][ T12] ? rcu_is_watching+0x12/0xb0
[ 97.016842][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 97.016846][ T12] ret_from_fork+0x1db/0x270
[ 97.016849][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 97.016852][ T12] ret_from_fork_asm+0x11/0x20
[ 97.016861][ T12]
[ 97.016863][ T12]
[ 97.023381][ T12] Allocated by task 276:
[ 97.023515][ T12] kasan_save_stack+0x24/0x40
[ 97.023694][ T12] kasan_save_track+0x14/0x30
[ 97.023858][ T12] __kasan_kmalloc+0x7b/0x90
[ 97.024024][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 97.024185][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 97.024353][ T12] ip6_tnl_init_net+0x102/0x3f0
[ 97.024514][ T12] ops_init+0x189/0x550
[ 97.024638][ T12] setup_net+0xf1/0x380
[ 97.024764][ T12] copy_net_ns+0x253/0x510
[ 97.024926][ T12] create_new_namespaces+0x35f/0x900
[ 97.025104][ T12] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 97.025272][ T12] ksys_unshare+0x2be/0x6e0
[ 97.025440][ T12] __x64_sys_unshare+0x31/0x40
[ 97.025611][ T12] do_syscall_64+0xc1/0xfd0
[ 97.025780][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 97.026009][ T12]
[ 97.026093][ T12] Freed by task 12:
[ 97.026218][ T12] kasan_save_stack+0x24/0x40
[ 97.026383][ T12] kasan_save_track+0x14/0x30
[ 97.026565][ T12] __kasan_save_free_info+0x3b/0x60
[ 97.026735][ T12] __kasan_slab_free+0x3f/0x60
[ 97.026907][ T12] kfree+0x21d/0x540
[ 97.027040][ T12] device_release+0x9c/0x210
[ 97.027208][ T12] kobject_cleanup+0xfe/0x360
[ 97.027376][ T12] netdev_run_todo+0x81f/0xc60
[ 97.027548][ T12] ops_undo_list+0x714/0x890
[ 97.027710][ T12] cleanup_net+0x3b2/0x8b0
[ 97.027870][ T12] process_one_work+0xe35/0x1650
[ 97.028037][ T12] worker_thread+0x591/0xcf0
[ 97.028217][ T12] kthread+0x37b/0x5f0
[ 97.028350][ T12] ret_from_fork+0x1db/0x270
[ 97.028515][ T12] ret_from_fork_asm+0x11/0x20
[ 97.028708][ T12]
[ 97.028796][ T12] The buggy address belongs to the object at ffff888008ba9000
[ 97.028796][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 97.029200][ T12] The buggy address is located 1732 bytes inside of
[ 97.029200][ T12] freed 4096-byte region [ffff888008ba9000, ffff888008baa000)
[ 97.029594][ T12]
[ 97.029675][ T12] The buggy address belongs to the physical page:
[ 97.029873][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8ba8
[ 97.030181][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 97.030428][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 97.030643][ T12] page_type: f5(slab)
[ 97.030770][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000250810 ffffea00002bd610
[ 97.031087][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 97.031384][ T12] head: 0080000000000040 ffff888001043700 ffffea0000250810 ffffea00002bd610
[ 97.031698][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 97.032017][ T12] head: 0080000000000003 ffffea000022ea01 00000000ffffffff 00000000ffffffff
[ 97.032299][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 97.032582][ T12] page dumped because: kasan: bad access detected
[ 97.032784][ T12]
[ 97.032863][ T12] Memory state around the buggy address:
[ 97.033021][ T12] ffff888008ba9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 97.033263][ T12] ffff888008ba9600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 97.033493][ T12] >ffff888008ba9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 97.033727][ T12] ^
[ 97.033919][ T12] ffff888008ba9700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 97.034157][ T12] ffff888008ba9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 97.034389][ T12] ==================================================================
[ 97.034779][ T12] Disabling lock debugging due to kernel taint
[ 97.035076][ T12] ------------[ cut here ]------------
[ 97.035226][ T12] refcount_t: underflow; use-after-free.
[ 97.035418][ T12] WARNING: CPU: 1 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 97.035701][ T12] Modules linked in:
[ 97.035872][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 97.036227][ T12] Tainted: [B]=BAD_PAGE
[ 97.036348][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 97.036546][ T12] Workqueue: netns cleanup_net
[ 97.036713][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 97.036923][ T12] 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 65 b5 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
[ 97.037465][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 97.037662][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 97.037903][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 97.038138][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff6cc0934
[ 97.038369][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 97.038604][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 97.038839][ T12] FS: 0000000000000000(0000) GS:ffff8880af188000(0000) knlGS:0000000000000000
[ 97.039141][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 97.039335][ T12] CR2: 0000561e68e477b8 CR3: 000000006bf49004 CR4: 0000000000772ef0
[ 97.039577][ T12] PKRU: 55555554
[ 97.039725][ T12] Call Trace:
[ 97.039852][ T12]
[ 97.039934][ T12] netdev_run_todo+0x5f0/0xc60
[ 97.040097][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 97.040270][ T12] ? generic_xdp_install+0x410/0x410
[ 97.040437][ T12] ? net_generic+0xb1/0x1f0
[ 97.040595][ T12] ops_undo_list+0x714/0x890
[ 97.040753][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 97.040939][ T12] ? cleanup_net+0x2d6/0x8b0
[ 97.041110][ T12] cleanup_net+0x3b2/0x8b0
[ 97.041385][ T12] ? net_passive_dec+0x190/0x190
[ 97.041542][ T12] ? rcu_is_watching+0x12/0xb0
[ 97.041722][ T12] process_one_work+0xe35/0x1650
[ 97.041903][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 97.042149][ T12] ? assign_work+0x168/0x240
[ 97.042332][ T12] worker_thread+0x591/0xcf0
[ 97.042513][ T12] ? rescuer_thread+0xd10/0xd10
[ 97.042694][ T12] kthread+0x37b/0x5f0
[ 97.043005][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 97.043164][ T12] ? ret_from_fork+0x1b/0x270
[ 97.043320][ T12] ? __lock_release+0x5d/0x170
[ 97.043479][ T12] ? rcu_is_watching+0x12/0xb0
[ 97.043633][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 97.043786][ T12] ret_from_fork+0x1db/0x270
[ 97.044012][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 97.044176][ T12] ret_from_fork_asm+0x11/0x20
[ 97.044352][ T12]
[ 97.044472][ T12] irq event stamp: 26403
[ 97.044591][ T12] hardirqs last enabled at (26403): [] finish_task_switch.isra.0+0x245/0x960
[ 97.045003][ T12] hardirqs last disabled at (26402): [] __schedule+0x94a/0x1b10
[ 97.045276][ T12] softirqs last enabled at (25390): [] handle_softirqs+0x352/0x610
[ 97.045654][ T12] softirqs last disabled at (25295): [] irq_exit_rcu+0xab/0x100
[ 97.046013][ T12] ---[ end trace 0000000000000000 ]---