[ 18.107394][ T274] ip (274) used greatest stack depth: 24000 bytes left
[ 19.991678][ T291] veth0: renamed from veth-rt-1
[ 21.481382][ T300] veth0: renamed from veth-rt-2
[ 66.468729][ T12] ==================================================================
[ 66.469019][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 66.469277][ T12] Read of size 1 at addr ffff88800f5096c4 by task kworker/u16:0/12
[ 66.469512][ T12]
[ 66.469610][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 66.469616][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 66.469619][ T12] Workqueue: netns cleanup_net
[ 66.469627][ T12] Call Trace:
[ 66.469631][ T12]
[ 66.469633][ T12] dump_stack_lvl+0x82/0xc0
[ 66.469643][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 66.469656][ T12] ? kobject_put+0xbb/0xd0
[ 66.469660][ T12] print_report+0xb4/0x270
[ 66.469664][ T12] ? kobject_put+0xbb/0xd0
[ 66.469667][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 66.469670][ T12] ? kobject_put+0xbb/0xd0
[ 66.469673][ T12] kasan_report+0xca/0x100
[ 66.469677][ T12] ? kobject_put+0xbb/0xd0
[ 66.469682][ T12] kobject_put+0xbb/0xd0
[ 66.469686][ T12] netdev_run_todo+0x5f0/0xc60
[ 66.469691][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 66.469695][ T12] ? generic_xdp_install+0x410/0x410
[ 66.469698][ T12] ? net_generic+0xb1/0x1f0
[ 66.469706][ T12] ops_undo_list+0x714/0x890
[ 66.469712][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 66.469715][ T12] ? cleanup_net+0x2d6/0x8b0
[ 66.469721][ T12] cleanup_net+0x3b2/0x8b0
[ 66.469725][ T12] ? net_passive_dec+0x190/0x190
[ 66.469730][ T12] ? rcu_is_watching+0x12/0xb0
[ 66.469740][ T12] process_one_work+0xe35/0x1650
[ 66.469752][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 66.469758][ T12] ? assign_work+0x168/0x240
[ 66.469762][ T12] worker_thread+0x591/0xcf0
[ 66.469768][ T12] ? rescuer_thread+0xd10/0xd10
[ 66.469771][ T12] kthread+0x37b/0x5f0
[ 66.469775][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 66.469780][ T12] ? ret_from_fork+0x1b/0x270
[ 66.469784][ T12] ? __lock_release+0x5d/0x170
[ 66.469788][ T12] ? rcu_is_watching+0x12/0xb0
[ 66.469792][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 66.469795][ T12] ret_from_fork+0x1db/0x270
[ 66.469798][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 66.469801][ T12] ret_from_fork_asm+0x11/0x20
[ 66.469814][ T12]
[ 66.469815][ T12]
[ 66.476141][ T12] Allocated by task 273:
[ 66.476274][ T12] kasan_save_stack+0x24/0x40
[ 66.476441][ T12] kasan_save_track+0x14/0x30
[ 66.476616][ T12] __kasan_kmalloc+0x7b/0x90
[ 66.476782][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 66.476941][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 66.477112][ T12] ip6_tnl_init_net+0x102/0x3f0
[ 66.477279][ T12] ops_init+0x189/0x550
[ 66.477405][ T12] setup_net+0xf1/0x380
[ 66.477537][ T12] copy_net_ns+0x253/0x510
[ 66.477708][ T12] create_new_namespaces+0x35f/0x900
[ 66.477866][ T12] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 66.478040][ T12] ksys_unshare+0x2be/0x6e0
[ 66.478198][ T12] __x64_sys_unshare+0x31/0x40
[ 66.478358][ T12] do_syscall_64+0xc1/0xfd0
[ 66.478527][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 66.478745][ T12]
[ 66.478834][ T12] Freed by task 12:
[ 66.478956][ T12] kasan_save_stack+0x24/0x40
[ 66.479136][ T12] kasan_save_track+0x14/0x30
[ 66.479305][ T12] __kasan_save_free_info+0x3b/0x60
[ 66.479469][ T12] __kasan_slab_free+0x3f/0x60
[ 66.479654][ T12] kfree+0x21d/0x540
[ 66.479780][ T12] device_release+0x9c/0x210
[ 66.479945][ T12] kobject_cleanup+0xfe/0x360
[ 66.480113][ T12] netdev_run_todo+0x81f/0xc60
[ 66.480276][ T12] ops_undo_list+0x714/0x890
[ 66.480439][ T12] cleanup_net+0x3b2/0x8b0
[ 66.480629][ T12] process_one_work+0xe35/0x1650
[ 66.480812][ T12] worker_thread+0x591/0xcf0
[ 66.480970][ T12] kthread+0x37b/0x5f0
[ 66.481103][ T12] ret_from_fork+0x1db/0x270
[ 66.481272][ T12] ret_from_fork_asm+0x11/0x20
[ 66.481433][ T12]
[ 66.481527][ T12] The buggy address belongs to the object at ffff88800f509000
[ 66.481527][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 66.481924][ T12] The buggy address is located 1732 bytes inside of
[ 66.481924][ T12] freed 4096-byte region [ffff88800f509000, ffff88800f50a000)
[ 66.482336][ T12]
[ 66.482415][ T12] The buggy address belongs to the physical page:
[ 66.482628][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf508
[ 66.482925][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 66.483172][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 66.483387][ T12] page_type: f5(slab)
[ 66.483517][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000141410 ffffea0000398610
[ 66.483822][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 66.484107][ T12] head: 0080000000000040 ffff888001043700 ffffea0000141410 ffffea0000398610
[ 66.484413][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 66.484727][ T12] head: 0080000000000003 ffffea00003d4201 00000000ffffffff 00000000ffffffff
[ 66.485009][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 66.485307][ T12] page dumped because: kasan: bad access detected
[ 66.485506][ T12]
[ 66.485598][ T12] Memory state around the buggy address:
[ 66.485763][ T12] ffff88800f509580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 66.486001][ T12] ffff88800f509600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 66.486244][ T12] >ffff88800f509680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 66.486476][ T12] ^
[ 66.486695][ T12] ffff88800f509700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 66.486989][ T12] ffff88800f509780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 66.487244][ T12] ==================================================================
[ 66.487806][ T12] Disabling lock debugging due to kernel taint
[ 66.488043][ T12] ------------[ cut here ]------------
[ 66.488209][ T12] refcount_t: underflow; use-after-free.
[ 66.488427][ T12] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 66.488770][ T12] Modules linked in:
[ 66.488915][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 66.489325][ T12] Tainted: [B]=BAD_PAGE
[ 66.489459][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 66.489702][ T12] Workqueue: netns cleanup_net
[ 66.489881][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 66.490121][ 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 8f 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
[ 66.490741][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 66.490966][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 66.491241][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 66.491490][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff20c0934
[ 66.491760][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 66.492043][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 66.492296][ T12] FS: 0000000000000000(0000) GS:ffff8880db508000(0000) knlGS:0000000000000000
[ 66.492615][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 66.492840][ T12] CR2: 00007f82e7eb7810 CR3: 000000003a349004 CR4: 0000000000772ef0
[ 66.493122][ T12] PKRU: 55555554
[ 66.493263][ T12] Call Trace:
[ 66.493397][ T12]
[ 66.493498][ T12] netdev_run_todo+0x5f0/0xc60
[ 66.493695][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 66.493876][ T12] ? generic_xdp_install+0x410/0x410
[ 66.494073][ T12] ? net_generic+0xb1/0x1f0
[ 66.494262][ T12] ops_undo_list+0x714/0x890
[ 66.494440][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 66.494632][ T12] ? cleanup_net+0x2d6/0x8b0
[ 66.494815][ T12] cleanup_net+0x3b2/0x8b0
[ 66.495095][ T12] ? net_passive_dec+0x190/0x190
[ 66.495279][ T12] ? rcu_is_watching+0x12/0xb0
[ 66.495452][ T12] process_one_work+0xe35/0x1650
[ 66.495652][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 66.495826][ T12] ? assign_work+0x168/0x240
[ 66.496009][ T12] worker_thread+0x591/0xcf0
[ 66.496287][ T12] ? rescuer_thread+0xd10/0xd10
[ 66.496462][ T12] kthread+0x37b/0x5f0
[ 66.496596][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 66.496777][ T12] ? ret_from_fork+0x1b/0x270
[ 66.496954][ T12] ? __lock_release+0x5d/0x170
[ 66.497169][ T12] ? rcu_is_watching+0x12/0xb0
[ 66.497340][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 66.497513][ T12] ret_from_fork+0x1db/0x270
[ 66.497701][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 66.497881][ T12] ret_from_fork_asm+0x11/0x20
[ 66.498075][ T12]
[ 66.498211][ T12] irq event stamp: 21519
[ 66.498338][ T12] hardirqs last enabled at (21519): [] irqentry_exit+0x3b/0x80
[ 66.498654][ T12] hardirqs last disabled at (21518): [] handle_softirqs+0x47f/0x610
[ 66.499065][ T12] softirqs last enabled at (20802): [] handle_softirqs+0x352/0x610
[ 66.499452][ T12] softirqs last disabled at (20795): [] irq_exit_rcu+0xab/0x100
[ 66.499768][ T12] ---[ end trace 0000000000000000 ]---