[ 16.824348][ T267] ip (267) used greatest stack depth: 23904 bytes left
[ 23.931099][ T68] ==================================================================
[ 23.931399][ T68] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 23.931661][ T68] Read of size 1 at addr ffff888007b1c6c4 by task kworker/u16:1/68
[ 23.931921][ T68]
[ 23.932014][ T68] CPU: 1 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 23.932019][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 23.932022][ T68] Workqueue: netns cleanup_net
[ 23.932030][ T68] Call Trace:
[ 23.932032][ T68]
[ 23.932035][ T68] dump_stack_lvl+0x82/0xc0
[ 23.932041][ T68] print_address_description.constprop.0+0x2c/0x3a0
[ 23.932047][ T68] ? kobject_put+0xbb/0xd0
[ 23.932051][ T68] print_report+0xb4/0x270
[ 23.932054][ T68] ? kobject_put+0xbb/0xd0
[ 23.932057][ T68] ? kasan_addr_to_slab+0x21/0x70
[ 23.932061][ T68] ? kobject_put+0xbb/0xd0
[ 23.932064][ T68] kasan_report+0xca/0x100
[ 23.932068][ T68] ? kobject_put+0xbb/0xd0
[ 23.932073][ T68] kobject_put+0xbb/0xd0
[ 23.932076][ T68] netdev_run_todo+0x5f0/0xc60
[ 23.932082][ T68] ? dev_ingress_queue_create+0x190/0x190
[ 23.932085][ T68] ? generic_xdp_install+0x410/0x410
[ 23.932088][ T68] ? net_generic+0xb1/0x1f0
[ 23.932097][ T68] ops_undo_list+0x714/0x890
[ 23.932102][ T68] ? rtnl_net_dumpid_one+0x270/0x270
[ 23.932105][ T68] ? cleanup_net+0x2d6/0x8b0
[ 23.932111][ T68] cleanup_net+0x3b2/0x8b0
[ 23.932116][ T68] ? net_passive_dec+0x190/0x190
[ 23.932120][ T68] ? rcu_is_watching+0x12/0xb0
[ 23.932127][ T68] process_one_work+0xe35/0x1650
[ 23.932135][ T68] ? pwq_dec_nr_in_flight+0x550/0x550
[ 23.932141][ T68] ? assign_work+0x168/0x240
[ 23.932145][ T68] worker_thread+0x591/0xcf0
[ 23.932151][ T68] ? rescuer_thread+0xd10/0xd10
[ 23.932155][ T68] kthread+0x37b/0x5f0
[ 23.932159][ T68] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.932161][ T68] ? ret_from_fork+0x1b/0x270
[ 23.932166][ T68] ? __lock_release+0x5d/0x170
[ 23.932170][ T68] ? rcu_is_watching+0x12/0xb0
[ 23.932173][ T68] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.932177][ T68] ret_from_fork+0x1db/0x270
[ 23.932180][ T68] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.932183][ T68] ret_from_fork_asm+0x11/0x20
[ 23.932193][ T68]
[ 23.932194][ T68]
[ 23.938958][ T68] Allocated by task 261:
[ 23.939086][ T68] kasan_save_stack+0x24/0x40
[ 23.939265][ T68] kasan_save_track+0x14/0x30
[ 23.939440][ T68] __kasan_kmalloc+0x7b/0x90
[ 23.939609][ T68] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 23.939782][ T68] alloc_netdev_mqs+0x7d/0x1370
[ 23.939962][ T68] ip6_tnl_init_net+0x102/0x3f0
[ 23.940138][ T68] ops_init+0x189/0x550
[ 23.940268][ T68] setup_net+0xf1/0x380
[ 23.940399][ T68] copy_net_ns+0x253/0x510
[ 23.940574][ T68] create_new_namespaces+0x35f/0x900
[ 23.940748][ T68] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 23.940928][ T68] ksys_unshare+0x2be/0x6e0
[ 23.941118][ T68] __x64_sys_unshare+0x31/0x40
[ 23.941292][ T68] do_syscall_64+0xc1/0xfd0
[ 23.941468][ T68] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 23.941687][ T68]
[ 23.941778][ T68] Freed by task 68:
[ 23.941921][ T68] kasan_save_stack+0x24/0x40
[ 23.942095][ T68] kasan_save_track+0x14/0x30
[ 23.942262][ T68] __kasan_save_free_info+0x3b/0x60
[ 23.942433][ T68] __kasan_slab_free+0x3f/0x60
[ 23.942608][ T68] kfree+0x21d/0x540
[ 23.942803][ T68] device_release+0x9c/0x210
[ 23.943077][ T68] kobject_cleanup+0xfe/0x360
[ 23.943359][ T68] netdev_run_todo+0x81f/0xc60
[ 23.943641][ T68] ops_undo_list+0x714/0x890
[ 23.943907][ T68] cleanup_net+0x3b2/0x8b0
[ 23.944084][ T68] process_one_work+0xe35/0x1650
[ 23.944257][ T68] worker_thread+0x591/0xcf0
[ 23.944429][ T68] kthread+0x37b/0x5f0
[ 23.944558][ T68] ret_from_fork+0x1db/0x270
[ 23.944736][ T68] ret_from_fork_asm+0x11/0x20
[ 23.944909][ T68]
[ 23.944999][ T68] The buggy address belongs to the object at ffff888007b1c000
[ 23.944999][ T68] which belongs to the cache kmalloc-4k of size 4096
[ 23.945502][ T68] The buggy address is located 1732 bytes inside of
[ 23.945502][ T68] freed 4096-byte region [ffff888007b1c000, ffff888007b1d000)
[ 23.945996][ T68]
[ 23.946085][ T68] The buggy address belongs to the physical page:
[ 23.946294][ T68] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7b18
[ 23.946698][ T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 23.946976][ T68] flags: 0x80000000000040(head|node=0|zone=1)
[ 23.947202][ T68] page_type: f5(slab)
[ 23.947337][ T68] raw: 0080000000000040 ffff888001043700 ffffea0000203410 ffffea0000229410
[ 23.947731][ T68] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 23.948009][ T68] head: 0080000000000040 ffff888001043700 ffffea0000203410 ffffea0000229410
[ 23.948380][ T68] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 23.948661][ T68] head: 0080000000000003 ffffea00001ec601 00000000ffffffff 00000000ffffffff
[ 23.949027][ T68] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 23.949311][ T68] page dumped because: kasan: bad access detected
[ 23.949514][ T68]
[ 23.949592][ T68] Memory state around the buggy address:
[ 23.949827][ T68] ffff888007b1c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 23.950052][ T68] ffff888007b1c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 23.950276][ T68] >ffff888007b1c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 23.950581][ T68] ^
[ 23.950767][ T68] ffff888007b1c700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 23.951089][ T68] ffff888007b1c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 23.951316][ T68] ==================================================================
[ 23.951921][ T68] Disabling lock debugging due to kernel taint
[ 23.952325][ T68] ------------[ cut here ]------------
[ 23.952577][ T68] refcount_t: underflow; use-after-free.
[ 23.952854][ T68] WARNING: CPU: 0 PID: 68 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 23.953336][ T68] Modules linked in:
[ 23.953560][ T68] CPU: 0 UID: 0 PID: 68 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 23.954208][ T68] Tainted: [B]=BAD_PAGE
[ 23.954423][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 23.954783][ T68] Workqueue: netns cleanup_net
[ 23.955099][ T68] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 23.955458][ T68] 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 8d 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
[ 23.956456][ T68] RSP: 0018:ffffc90000497a08 EFLAGS: 00010282
[ 23.956811][ T68] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 23.957248][ T68] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 23.957682][ T68] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff1cc0934
[ 23.958094][ T68] R10: 0000000000000003 R11: ffffc90000497580 R12: 0000000000000001
[ 23.958498][ T68] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 23.958868][ T68] FS: 0000000000000000(0000) GS:ffff8880dd508000(0000) knlGS:0000000000000000
[ 23.959302][ T68] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 23.959620][ T68] CR2: 00007ffd7e827ff0 CR3: 0000000005079003 CR4: 0000000000772ef0
[ 23.960004][ T68] PKRU: 55555554
[ 23.960214][ T68] Call Trace:
[ 23.960420][ T68]
[ 23.960563][ T68] netdev_run_todo+0x5f0/0xc60
[ 23.960845][ T68] ? dev_ingress_queue_create+0x190/0x190
[ 23.961120][ T68] ? generic_xdp_install+0x410/0x410
[ 23.961372][ T68] ? net_generic+0xb1/0x1f0
[ 23.961621][ T68] ops_undo_list+0x714/0x890
[ 23.961894][ T68] ? rtnl_net_dumpid_one+0x270/0x270
[ 23.962165][ T68] ? cleanup_net+0x2d6/0x8b0
[ 23.962440][ T68] cleanup_net+0x3b2/0x8b0
[ 23.962719][ T68] ? net_passive_dec+0x190/0x190
[ 23.962992][ T68] ? rcu_is_watching+0x12/0xb0
[ 23.963293][ T68] process_one_work+0xe35/0x1650
[ 23.963580][ T68] ? pwq_dec_nr_in_flight+0x550/0x550
[ 23.963842][ T68] ? assign_work+0x168/0x240
[ 23.964114][ T68] worker_thread+0x591/0xcf0
[ 23.964369][ T68] ? rescuer_thread+0xd10/0xd10
[ 23.964627][ T68] kthread+0x37b/0x5f0
[ 23.964817][ T68] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.965093][ T68] ? ret_from_fork+0x1b/0x270
[ 23.965353][ T68] ? __lock_release+0x5d/0x170
[ 23.965607][ T68] ? rcu_is_watching+0x12/0xb0
[ 23.965868][ T68] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.966155][ T68] ret_from_fork+0x1db/0x270
[ 23.966436][ T68] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.966687][ T68] ret_from_fork_asm+0x11/0x20
[ 23.966951][ T68]
[ 23.967160][ T68] irq event stamp: 19007
[ 23.967360][ T68] hardirqs last enabled at (19007): [] finish_task_switch.isra.0+0x245/0x960
[ 23.967867][ T68] hardirqs last disabled at (19006): [] __schedule+0x94a/0x1b10
[ 23.968326][ T68] softirqs last enabled at (18068): [] unregister_netdevice_many_notify+0x714/0x1c90
[ 23.968852][ T68] softirqs last disabled at (18066): [] dev_mc_flush+0x54/0x90
[ 23.969323][ T68] ---[ end trace 0000000000000000 ]---