[ 16.193038][ T234] ip (234) used greatest stack depth: 24688 bytes left
[ 17.333537][ T239] bond0: (slave eth0): making interface the new active one
[ 17.335123][ T239] bond0: (slave eth0): Enslaving as an active interface with an up link
[ 17.347341][ T239] ip (239) used greatest stack depth: 24592 bytes left
[ 22.375379][ T244] bond0: (slave eth0): Releasing backup interface
[ 23.197918][ T247] bond0: (slave eth0): Enslaving as an active interface with an up link
[ 27.948890][ T240] ==================================================================
[ 27.949229][ T240] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 27.949602][ T240] Read of size 1 at addr ffff888001e9c69c by task kworker/u16:2/240
[ 27.949883][ T240]
[ 27.949975][ T240] CPU: 0 UID: 0 PID: 240 Comm: kworker/u16:2 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 27.949981][ T240] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 27.949985][ T240] Workqueue: netns cleanup_net
[ 27.949994][ T240] Call Trace:
[ 27.949997][ T240]
[ 27.949999][ T240] dump_stack_lvl+0x82/0xc0
[ 27.950006][ T240] print_address_description.constprop.0+0x2c/0x3a0
[ 27.950018][ T240] ? kobject_put+0xbb/0xd0
[ 27.950023][ T240] print_report+0xb4/0x270
[ 27.950025][ T240] ? kobject_put+0xbb/0xd0
[ 27.950028][ T240] ? kasan_addr_to_slab+0x21/0x70
[ 27.950031][ T240] ? kobject_put+0xbb/0xd0
[ 27.950034][ T240] kasan_report+0xca/0x100
[ 27.950037][ T240] ? kobject_put+0xbb/0xd0
[ 27.950042][ T240] kobject_put+0xbb/0xd0
[ 27.950045][ T240] netdev_run_todo+0x5f0/0xc60
[ 27.950051][ T240] ? dev_ingress_queue_create+0x190/0x190
[ 27.950054][ T240] ? generic_xdp_install+0x410/0x410
[ 27.950057][ T240] ? __lock_release+0x5d/0x170
[ 27.950064][ T240] ? bond_net_exit_rtnl+0xcf/0x2f0
[ 27.950073][ T240] ops_undo_list+0x714/0x890
[ 27.950078][ T240] ? netns_get+0x110/0x110
[ 27.950081][ T240] ? cleanup_net+0x2d6/0x830
[ 27.950086][ T240] cleanup_net+0x3b2/0x830
[ 27.950090][ T240] ? net_passive_dec+0x190/0x190
[ 27.950095][ T240] ? rcu_is_watching+0x12/0xb0
[ 27.950102][ T240] process_one_work+0xe35/0x1650
[ 27.950110][ T240] ? pwq_dec_nr_in_flight+0x550/0x550
[ 27.950116][ T240] ? assign_work+0x168/0x240
[ 27.950120][ T240] worker_thread+0x591/0xcf0
[ 27.950126][ T240] ? rescuer_thread+0xd10/0xd10
[ 27.950129][ T240] kthread+0x37b/0x5f0
[ 27.950134][ T240] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.950137][ T240] ? ret_from_fork+0x1b/0x270
[ 27.950144][ T240] ? __lock_release+0x5d/0x170
[ 27.950148][ T240] ? rcu_is_watching+0x12/0xb0
[ 27.950150][ T240] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.950154][ T240] ret_from_fork+0x1db/0x270
[ 27.950157][ T240] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.950160][ T240] ret_from_fork_asm+0x11/0x20
[ 27.950170][ T240]
[ 27.950171][ T240]
[ 27.957700][ T240] Allocated by task 232:
[ 27.957850][ T240] kasan_save_stack+0x24/0x40
[ 27.958030][ T240] kasan_save_track+0x14/0x30
[ 27.958204][ T240] __kasan_kmalloc+0x7b/0x90
[ 27.958415][ T240] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 27.958610][ T240] alloc_netdev_mqs+0x7d/0x1310
[ 27.958803][ T240] sit_init_net+0x169/0x550
[ 27.958991][ T240] ops_init+0x189/0x550
[ 27.959129][ T240] setup_net+0xf1/0x380
[ 27.959263][ T240] copy_net_ns+0x21a/0x380
[ 27.959464][ T240] create_new_namespaces+0x35f/0x900
[ 27.959723][ T240] unshare_nsproxy_namespaces+0x89/0x120
[ 27.959938][ T240] ksys_unshare+0x2a3/0x660
[ 27.960114][ T240] __x64_sys_unshare+0x31/0x40
[ 27.960310][ T240] do_syscall_64+0xc1/0xfd0
[ 27.960511][ T240] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 27.960748][ T240]
[ 27.960844][ T240] Freed by task 240:
[ 27.960971][ T240] kasan_save_stack+0x24/0x40
[ 27.961163][ T240] kasan_save_track+0x14/0x30
[ 27.961353][ T240] __kasan_save_free_info+0x3b/0x60
[ 27.961541][ T240] __kasan_slab_free+0x3f/0x60
[ 27.961778][ T240] kfree+0x21d/0x540
[ 27.961934][ T240] device_release+0x9c/0x210
[ 27.962108][ T240] kobject_cleanup+0xfe/0x360
[ 27.962308][ T240] netdev_run_todo+0x81f/0xc60
[ 27.962487][ T240] ops_undo_list+0x714/0x890
[ 27.962688][ T240] cleanup_net+0x3b2/0x830
[ 27.962875][ T240] process_one_work+0xe35/0x1650
[ 27.963045][ T240] worker_thread+0x591/0xcf0
[ 27.963225][ T240] kthread+0x37b/0x5f0
[ 27.963375][ T240] ret_from_fork+0x1db/0x270
[ 27.963564][ T240] ret_from_fork_asm+0x11/0x20
[ 27.963750][ T240]
[ 27.963847][ T240] The buggy address belongs to the object at ffff888001e9c000
[ 27.963847][ T240] which belongs to the cache kmalloc-4k of size 4096
[ 27.964339][ T240] The buggy address is located 1692 bytes inside of
[ 27.964339][ T240] freed 4096-byte region [ffff888001e9c000, ffff888001e9d000)
[ 27.964801][ T240]
[ 27.964887][ T240] The buggy address belongs to the physical page:
[ 27.965100][ T240] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1e98
[ 27.965434][ T240] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 27.965721][ T240] flags: 0x80000000000040(head|node=0|zone=1)
[ 27.965949][ T240] page_type: f5(slab)
[ 27.966082][ T240] raw: 0080000000000040 ffff888001043700 ffffea00000a3c10 ffffea0000134c10
[ 27.966424][ T240] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 27.966771][ T240] head: 0080000000000040 ffff888001043700 ffffea00000a3c10 ffffea0000134c10
[ 27.967076][ T240] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 27.967423][ T240] head: 0080000000000003 ffffea000007a601 00000000ffffffff 00000000ffffffff
[ 27.967772][ T240] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 27.968088][ T240] page dumped because: kasan: bad access detected
[ 27.968332][ T240]
[ 27.968428][ T240] Memory state around the buggy address:
[ 27.968631][ T240] ffff888001e9c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 27.968902][ T240] ffff888001e9c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 27.969153][ T240] >ffff888001e9c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 27.969458][ T240] ^
[ 27.969677][ T240] ffff888001e9c700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 27.969936][ T240] ffff888001e9c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 27.970201][ T240] ==================================================================
[ 27.970634][ T240] Disabling lock debugging due to kernel taint
[ 27.970934][ T240] ------------[ cut here ]------------
[ 27.971093][ T240] refcount_t: underflow; use-after-free.
[ 27.971294][ T240] WARNING: CPU: 3 PID: 240 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 27.971629][ T240] Modules linked in:
[ 27.971771][ T240] CPU: 3 UID: 0 PID: 240 Comm: kworker/u16:2 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 27.972143][ T240] Tainted: [B]=BAD_PAGE
[ 27.972273][ T240] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 27.972498][ T240] Workqueue: netns cleanup_net
[ 27.972925][ T240] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 27.973128][ T240] Code: a2 b5 02 80 fb 01 0f 87 db 6e d8 fe 83 e3 01 0f 85 51 ff ff ff c6 05 c2 a2 b5 02 01 90 48 c7 c7 60 a8 45 91 e8 72 c3 17 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 20 69 a0 ff e9 ba fe ff ff
[ 27.973708][ T240] RSP: 0018:ffffc90000a97a08 EFLAGS: 00010282
[ 27.973898][ T240] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 27.974139][ T240] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 27.974374][ T240] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff23be134
[ 27.974596][ T240] R10: 0000000000000003 R11: ffffc90000a97580 R12: 0000000000000001
[ 27.974869][ T240] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 27.975110][ T240] FS: 0000000000000000(0000) GS:ffff8880a3101000(0000) knlGS:0000000000000000
[ 27.975384][ T240] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 27.975622][ T240] CR2: 000055c824f66dec CR3: 0000000008987004 CR4: 0000000000772ef0
[ 27.975854][ T240] PKRU: 55555554
[ 27.975970][ T240] Call Trace:
[ 27.976086][ T240]
[ 27.976172][ T240] netdev_run_todo+0x5f0/0xc60
[ 27.976334][ T240] ? dev_ingress_queue_create+0x190/0x190
[ 27.976492][ T240] ? generic_xdp_install+0x410/0x410
[ 27.976672][ T240] ? __lock_release+0x5d/0x170
[ 27.976852][ T240] ? bond_net_exit_rtnl+0xcf/0x2f0
[ 27.977020][ T240] ops_undo_list+0x714/0x890
[ 27.977180][ T240] ? netns_get+0x110/0x110
[ 27.977338][ T240] ? cleanup_net+0x2d6/0x830
[ 27.977499][ T240] cleanup_net+0x3b2/0x830
[ 27.977675][ T240] ? net_passive_dec+0x190/0x190
[ 27.977835][ T240] ? rcu_is_watching+0x12/0xb0
[ 27.977995][ T240] process_one_work+0xe35/0x1650
[ 27.978152][ T240] ? pwq_dec_nr_in_flight+0x550/0x550
[ 27.978306][ T240] ? assign_work+0x168/0x240
[ 27.978458][ T240] worker_thread+0x591/0xcf0
[ 27.978617][ T240] ? rescuer_thread+0xd10/0xd10
[ 27.978768][ T240] kthread+0x37b/0x5f0
[ 27.978885][ T240] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.979046][ T240] ? ret_from_fork+0x1b/0x270
[ 27.979219][ T240] ? __lock_release+0x5d/0x170
[ 27.979376][ T240] ? rcu_is_watching+0x12/0xb0
[ 27.979543][ T240] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.979704][ T240] ret_from_fork+0x1db/0x270
[ 27.979858][ T240] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.980023][ T240] ret_from_fork_asm+0x11/0x20
[ 27.980178][ T240]
[ 27.980379][ T240] irq event stamp: 6049
[ 27.980514][ T240] hardirqs last enabled at (6049): [] finish_task_switch.isra.0+0x245/0x960
[ 27.980836][ T240] hardirqs last disabled at (6048): [] __schedule+0x94a/0x1b10
[ 27.981098][ T240] softirqs last enabled at (5936): [] handle_softirqs+0x352/0x610
[ 27.981359][ T240] softirqs last disabled at (5929): [] irq_exit_rcu+0xab/0x100
[ 27.981789][ T240] ---[ end trace 0000000000000000 ]---
[ 27.993011][ T240] bond0: (slave eth0): Releasing backup interface
[ 28.049323][ T240] bond0 (unregistering): Released all slaves