[ 47.074061][ T482] ip (482) used greatest stack depth: 23536 bytes left
[ 47.999222][ T501] veth0: renamed from veth-rt-1
[ 49.316375][ T514] veth0: renamed from veth-rt-2
[ 58.726300][ T69] ==================================================================
[ 58.726610][ T69] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 58.726862][ T69] Read of size 1 at addr ffff888009b646c4 by task kworker/u16:1/69
[ 58.727123][ T69]
[ 58.727206][ T69] CPU: 1 UID: 0 PID: 69 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 58.727213][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 58.727216][ T69] Workqueue: netns cleanup_net
[ 58.727226][ T69] Call Trace:
[ 58.727229][ T69]
[ 58.727233][ T69] dump_stack_lvl+0x82/0xc0
[ 58.727241][ T69] print_address_description.constprop.0+0x2c/0x3a0
[ 58.727249][ T69] ? kobject_put+0xbb/0xd0
[ 58.727253][ T69] print_report+0xb4/0x270
[ 58.727257][ T69] ? kobject_put+0xbb/0xd0
[ 58.727260][ T69] ? kasan_addr_to_slab+0x21/0x70
[ 58.727264][ T69] ? kobject_put+0xbb/0xd0
[ 58.727267][ T69] kasan_report+0xca/0x100
[ 58.727271][ T69] ? kobject_put+0xbb/0xd0
[ 58.727276][ T69] kobject_put+0xbb/0xd0
[ 58.727279][ T69] netdev_run_todo+0x5f0/0xc60
[ 58.727286][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 58.727290][ T69] ? generic_xdp_install+0x410/0x410
[ 58.727293][ T69] ? net_generic+0xb1/0x1f0
[ 58.727307][ T69] ops_undo_list+0x714/0x890
[ 58.727314][ T69] ? rtnl_net_dumpid_one+0x270/0x270
[ 58.727319][ T69] ? cleanup_net+0x2d6/0x8b0
[ 58.727328][ T69] cleanup_net+0x3b2/0x8b0
[ 58.727333][ T69] ? net_passive_dec+0x190/0x190
[ 58.727338][ T69] ? rcu_is_watching+0x12/0xb0
[ 58.727347][ T69] process_one_work+0xe35/0x1650
[ 58.727357][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 58.727363][ T69] ? assign_work+0x168/0x240
[ 58.727367][ T69] worker_thread+0x591/0xcf0
[ 58.727373][ T69] ? rescuer_thread+0xd10/0xd10
[ 58.727377][ T69] kthread+0x37b/0x5f0
[ 58.727382][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 58.727385][ T69] ? ret_from_fork+0x1b/0x270
[ 58.727391][ T69] ? __lock_release+0x5d/0x170
[ 58.727396][ T69] ? rcu_is_watching+0x12/0xb0
[ 58.727399][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 58.727403][ T69] ret_from_fork+0x1db/0x270
[ 58.727405][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 58.727408][ T69] ret_from_fork_asm+0x11/0x20
[ 58.727419][ T69]
[ 58.727421][ T69]
[ 58.733925][ T69] Allocated by task 534:
[ 58.734065][ T69] kasan_save_stack+0x24/0x40
[ 58.734234][ T69] kasan_save_track+0x14/0x30
[ 58.734394][ T69] __kasan_kmalloc+0x7b/0x90
[ 58.734548][ T69] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 58.734705][ T69] alloc_netdev_mqs+0x7d/0x1370
[ 58.734865][ T69] ip6_tnl_init_net+0x102/0x3f0
[ 58.735045][ T69] ops_init+0x189/0x550
[ 58.735171][ T69] setup_net+0xf1/0x380
[ 58.735293][ T69] copy_net_ns+0x253/0x510
[ 58.735460][ T69] create_new_namespaces+0x35f/0x900
[ 58.735617][ T69] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 58.735771][ T69] ksys_unshare+0x2be/0x6e0
[ 58.735941][ T69] __x64_sys_unshare+0x31/0x40
[ 58.736110][ T69] do_syscall_64+0xc1/0xfd0
[ 58.736266][ T69] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 58.736475][ T69]
[ 58.736554][ T69] Freed by task 69:
[ 58.736670][ T69] kasan_save_stack+0x24/0x40
[ 58.736832][ T69] kasan_save_track+0x14/0x30
[ 58.737001][ T69] __kasan_save_free_info+0x3b/0x60
[ 58.737171][ T69] __kasan_slab_free+0x3f/0x60
[ 58.737343][ T69] kfree+0x21d/0x540
[ 58.737462][ T69] device_release+0x9c/0x210
[ 58.737619][ T69] kobject_cleanup+0xfe/0x360
[ 58.737788][ T69] netdev_run_todo+0x81f/0xc60
[ 58.737967][ T69] ops_undo_list+0x714/0x890
[ 58.738138][ T69] cleanup_net+0x3b2/0x8b0
[ 58.738313][ T69] process_one_work+0xe35/0x1650
[ 58.738476][ T69] worker_thread+0x591/0xcf0
[ 58.738628][ T69] kthread+0x37b/0x5f0
[ 58.738745][ T69] ret_from_fork+0x1db/0x270
[ 58.738914][ T69] ret_from_fork_asm+0x11/0x20
[ 58.739097][ T69]
[ 58.739177][ T69] The buggy address belongs to the object at ffff888009b64000
[ 58.739177][ T69] which belongs to the cache kmalloc-4k of size 4096
[ 58.739566][ T69] The buggy address is located 1732 bytes inside of
[ 58.739566][ T69] freed 4096-byte region [ffff888009b64000, ffff888009b65000)
[ 58.739965][ T69]
[ 58.740070][ T69] The buggy address belongs to the physical page:
[ 58.740260][ T69] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9b60
[ 58.740547][ T69] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 58.740792][ T69] flags: 0x80000000000040(head|node=0|zone=1)
[ 58.741008][ T69] page_type: f5(slab)
[ 58.741142][ T69] raw: 0080000000000040 ffff888001043700 ffffea00004fce10 ffffea000026de10
[ 58.741435][ T69] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 58.741720][ T69] head: 0080000000000040 ffff888001043700 ffffea00004fce10 ffffea000026de10
[ 58.742011][ T69] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 58.742291][ T69] head: 0080000000000003 ffffea000026d801 00000000ffffffff 00000000ffffffff
[ 58.742584][ T69] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 58.742861][ T69] page dumped because: kasan: bad access detected
[ 58.743069][ T69]
[ 58.743149][ T69] Memory state around the buggy address:
[ 58.743302][ T69] ffff888009b64580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 58.743542][ T69] ffff888009b64600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 58.743764][ T69] >ffff888009b64680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 58.744093][ T69] ^
[ 58.744304][ T69] ffff888009b64700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 58.744532][ T69] ffff888009b64780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 58.744843][ T69] ==================================================================
[ 58.745162][ T69] Disabling lock debugging due to kernel taint
[ 58.745572][ T69] ------------[ cut here ]------------
[ 58.745737][ T69] refcount_t: underflow; use-after-free.
[ 58.745941][ T69] WARNING: CPU: 0 PID: 69 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 58.746260][ T69] Modules linked in: ip6t_rpfilter nft_compat nf_tables pktgen
[ 58.746552][ T69] CPU: 0 UID: 0 PID: 69 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 58.746957][ T69] Tainted: [B]=BAD_PAGE
[ 58.747096][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 58.747323][ T69] Workqueue: netns cleanup_net
[ 58.747542][ T69] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 58.747773][ T69] 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 84 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
[ 58.748451][ T69] RSP: 0000:ffffc900004a7a08 EFLAGS: 00010282
[ 58.748685][ T69] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 58.748978][ T69] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 58.749245][ T69] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff0ac0934
[ 58.749532][ T69] R10: 0000000000000003 R11: ffffc900004a7580 R12: 0000000000000001
[ 58.749791][ T69] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 58.750073][ T69] FS: 0000000000000000(0000) GS:ffff8880e6508000(0000) knlGS:0000000000000000
[ 58.750402][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 58.750627][ T69] CR2: 00007f679a731069 CR3: 000000000d949005 CR4: 0000000000772ef0
[ 58.750896][ T69] PKRU: 55555554
[ 58.751036][ T69] Call Trace:
[ 58.751173][ T69]
[ 58.751272][ T69] netdev_run_todo+0x5f0/0xc60
[ 58.751479][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 58.751678][ T69] ? generic_xdp_install+0x410/0x410
[ 58.751858][ T69] ? net_generic+0xb1/0x1f0
[ 58.752086][ T69] ops_undo_list+0x714/0x890
[ 58.752263][ T69] ? rtnl_net_dumpid_one+0x270/0x270
[ 58.752471][ T69] ? cleanup_net+0x2d6/0x8b0
[ 58.752658][ T69] cleanup_net+0x3b2/0x8b0
[ 58.752834][ T69] ? net_passive_dec+0x190/0x190
[ 58.753042][ T69] ? rcu_is_watching+0x12/0xb0
[ 58.753228][ T69] process_one_work+0xe35/0x1650
[ 58.753422][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 58.753609][ T69] ? assign_work+0x168/0x240
[ 58.753889][ T69] worker_thread+0x591/0xcf0
[ 58.754083][ T69] ? rescuer_thread+0xd10/0xd10
[ 58.754267][ T69] kthread+0x37b/0x5f0
[ 58.754413][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 58.754675][ T69] ? ret_from_fork+0x1b/0x270
[ 58.754857][ T69] ? __lock_release+0x5d/0x170
[ 58.755045][ T69] ? rcu_is_watching+0x12/0xb0
[ 58.755222][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 58.755409][ T69] ret_from_fork+0x1db/0x270
[ 58.755584][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 58.755774][ T69] ret_from_fork_asm+0x11/0x20
[ 58.755971][ T69]
[ 58.756221][ T69] irq event stamp: 18265
[ 58.756371][ T69] hardirqs last enabled at (18265): [] finish_task_switch.isra.0+0x245/0x960
[ 58.756779][ T69] hardirqs last disabled at (18264): [] __schedule+0x94a/0x1b10
[ 58.757121][ T69] softirqs last enabled at (18028): [] handle_softirqs+0x352/0x610
[ 58.757432][ T69] softirqs last disabled at (17789): [] irq_exit_rcu+0xab/0x100
[ 58.757815][ T69] ---[ end trace 0000000000000000 ]---