[ 13.226697][ T234] ip (234) used greatest stack depth: 24272 bytes left
[ 14.124431][ T239] bond0: (slave eth0): making interface the new active one
[ 14.125630][ T239] bond0: (slave eth0): Enslaving as an active interface with an up link
[ 19.102829][ T243] bond0: (slave eth0): Releasing backup interface
[ 19.731770][ T246] bond0: (slave eth0): Enslaving as an active interface with an up link
[ 24.385674][ T72] ==================================================================
[ 24.385978][ T72] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 24.386245][ T72] Read of size 1 at addr ffff888005e3469c by task kworker/u16:1/72
[ 24.386510][ T72]
[ 24.386603][ T72] CPU: 0 UID: 0 PID: 72 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 24.386608][ T72] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 24.386610][ T72] Workqueue: netns cleanup_net
[ 24.386617][ T72] Call Trace:
[ 24.386619][ T72]
[ 24.386621][ T72] dump_stack_lvl+0x82/0xc0
[ 24.386626][ T72] print_address_description.constprop.0+0x2c/0x3a0
[ 24.386632][ T72] ? kobject_put+0xbb/0xd0
[ 24.386635][ T72] print_report+0xb4/0x270
[ 24.386638][ T72] ? kobject_put+0xbb/0xd0
[ 24.386640][ T72] ? kasan_addr_to_slab+0x21/0x70
[ 24.386643][ T72] ? kobject_put+0xbb/0xd0
[ 24.386645][ T72] kasan_report+0xca/0x100
[ 24.386649][ T72] ? kobject_put+0xbb/0xd0
[ 24.386653][ T72] kobject_put+0xbb/0xd0
[ 24.386656][ T72] netdev_run_todo+0x5f0/0xc60
[ 24.386661][ T72] ? dev_ingress_queue_create+0x190/0x190
[ 24.386664][ T72] ? generic_xdp_install+0x410/0x410
[ 24.386666][ T72] ? __lock_release+0x5d/0x170
[ 24.386673][ T72] ? bond_net_exit_rtnl+0xcf/0x2f0
[ 24.386679][ T72] ops_undo_list+0x714/0x890
[ 24.386684][ T72] ? netns_get+0x110/0x110
[ 24.386687][ T72] ? cleanup_net+0x2d6/0x830
[ 24.386693][ T72] cleanup_net+0x3b2/0x830
[ 24.386696][ T72] ? net_passive_dec+0x190/0x190
[ 24.386701][ T72] ? rcu_is_watching+0x12/0xb0
[ 24.386706][ T72] process_one_work+0xe35/0x1650
[ 24.386713][ T72] ? pwq_dec_nr_in_flight+0x550/0x550
[ 24.386719][ T72] ? assign_work+0x168/0x240
[ 24.386723][ T72] worker_thread+0x591/0xcf0
[ 24.386728][ T72] ? rescuer_thread+0xd10/0xd10
[ 24.386732][ T72] kthread+0x37b/0x5f0
[ 24.386736][ T72] ? kthread_is_per_cpu+0xc0/0xc0
[ 24.386738][ T72] ? ret_from_fork+0x1b/0x270
[ 24.386743][ T72] ? __lock_release+0x5d/0x170
[ 24.386747][ T72] ? rcu_is_watching+0x12/0xb0
[ 24.386750][ T72] ? kthread_is_per_cpu+0xc0/0xc0
[ 24.386753][ T72] ret_from_fork+0x1db/0x270
[ 24.386756][ T72] ? kthread_is_per_cpu+0xc0/0xc0
[ 24.386759][ T72] ret_from_fork_asm+0x11/0x20
[ 24.386767][ T72]
[ 24.386769][ T72]
[ 24.393848][ T72] Allocated by task 232:
[ 24.393977][ T72] kasan_save_stack+0x24/0x40
[ 24.394148][ T72] kasan_save_track+0x14/0x30
[ 24.394317][ T72] __kasan_kmalloc+0x7b/0x90
[ 24.394501][ T72] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 24.394687][ T72] alloc_netdev_mqs+0x7d/0x1310
[ 24.394874][ T72] sit_init_net+0x169/0x550
[ 24.395051][ T72] ops_init+0x189/0x550
[ 24.395185][ T72] setup_net+0xf1/0x380
[ 24.395327][ T72] copy_net_ns+0x21a/0x380
[ 24.395508][ T72] create_new_namespaces+0x35f/0x900
[ 24.395677][ T72] unshare_nsproxy_namespaces+0x89/0x120
[ 24.395846][ T72] ksys_unshare+0x2a3/0x660
[ 24.396014][ T72] __x64_sys_unshare+0x31/0x40
[ 24.396182][ T72] do_syscall_64+0xc1/0xfd0
[ 24.396351][ T72] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 24.396574][ T72]
[ 24.396660][ T72] Freed by task 72:
[ 24.396786][ T72] kasan_save_stack+0x24/0x40
[ 24.396955][ T72] kasan_save_track+0x14/0x30
[ 24.397213][ T72] __kasan_save_free_info+0x3b/0x60
[ 24.397397][ T72] __kasan_slab_free+0x3f/0x60
[ 24.397583][ T72] kfree+0x21d/0x540
[ 24.397709][ T72] device_release+0x9c/0x210
[ 24.397976][ T72] kobject_cleanup+0xfe/0x360
[ 24.398163][ T72] netdev_run_todo+0x81f/0xc60
[ 24.398338][ T72] ops_undo_list+0x714/0x890
[ 24.398523][ T72] cleanup_net+0x3b2/0x830
[ 24.398795][ T72] process_one_work+0xe35/0x1650
[ 24.398962][ T72] worker_thread+0x591/0xcf0
[ 24.399141][ T72] kthread+0x37b/0x5f0
[ 24.399267][ T72] ret_from_fork+0x1db/0x270
[ 24.399525][ T72] ret_from_fork_asm+0x11/0x20
[ 24.399708][ T72]
[ 24.399800][ T72] The buggy address belongs to the object at ffff888005e34000
[ 24.399800][ T72] which belongs to the cache kmalloc-4k of size 4096
[ 24.400296][ T72] The buggy address is located 1692 bytes inside of
[ 24.400296][ T72] freed 4096-byte region [ffff888005e34000, ffff888005e35000)
[ 24.400730][ T72]
[ 24.400813][ T72] The buggy address belongs to the physical page:
[ 24.401112][ T72] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e30
[ 24.401410][ T72] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 24.401676][ T72] flags: 0x80000000000040(head|node=0|zone=1)
[ 24.402003][ T72] page_type: f5(slab)
[ 24.402140][ T72] raw: 0080000000000040 ffff888001043700 ffffea0000165210 ffffea00001d4210
[ 24.402456][ T72] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 24.402878][ T72] head: 0080000000000040 ffff888001043700 ffffea0000165210 ffffea00001d4210
[ 24.403194][ T72] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 24.403598][ T72] head: 0080000000000003 ffffea0000178c01 00000000ffffffff 00000000ffffffff
[ 24.403896][ T72] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 24.404293][ T72] page dumped because: kasan: bad access detected
[ 24.404510][ T72]
[ 24.404599][ T72] Memory state around the buggy address:
[ 24.404771][ T72] ffff888005e34580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 24.405104][ T72] ffff888005e34600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 24.405351][ T72] >ffff888005e34680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 24.405594][ T72] ^
[ 24.405847][ T72] ffff888005e34700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 24.406101][ T72] ffff888005e34780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 24.406347][ T72] ==================================================================
[ 24.406741][ T72] Disabling lock debugging due to kernel taint
[ 24.407038][ T72] ------------[ cut here ]------------
[ 24.407243][ T72] refcount_t: underflow; use-after-free.
[ 24.407475][ T72] WARNING: CPU: 2 PID: 72 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 24.407795][ T72] Modules linked in:
[ 24.407970][ T72] CPU: 2 UID: 0 PID: 72 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 24.408370][ T72] Tainted: [B]=BAD_PAGE
[ 24.408549][ T72] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 24.408777][ T72] Workqueue: netns cleanup_net
[ 24.408994][ T72] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 24.409240][ T72] 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 c5 9b 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
[ 24.409853][ T72] RSP: 0018:ffffc900004d7a08 EFLAGS: 00010282
[ 24.410110][ T72] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 24.410381][ T72] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 24.410676][ T72] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff38be134
[ 24.410943][ T72] R10: 0000000000000003 R11: ffffc900004d7580 R12: 0000000000000001
[ 24.411235][ T72] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 24.411517][ T72] FS: 0000000000000000(0000) GS:ffff888098881000(0000) knlGS:0000000000000000
[ 24.411924][ T72] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 24.412172][ T72] CR2: 00007ffe80897ac8 CR3: 000000001bd35001 CR4: 0000000000772ef0
[ 24.412452][ T72] PKRU: 55555554
[ 24.412596][ T72] Call Trace:
[ 24.412763][ T72]
[ 24.412879][ T72] netdev_run_todo+0x5f0/0xc60
[ 24.413275][ T72] ? dev_ingress_queue_create+0x190/0x190
[ 24.413470][ T72] ? generic_xdp_install+0x410/0x410
[ 24.413643][ T72] ? __lock_release+0x5d/0x170
[ 24.413826][ T72] ? bond_net_exit_rtnl+0xcf/0x2f0
[ 24.414209][ T72] ops_undo_list+0x714/0x890
[ 24.414403][ T72] ? netns_get+0x110/0x110
[ 24.414596][ T72] ? cleanup_net+0x2d6/0x830
[ 24.414781][ T72] cleanup_net+0x3b2/0x830
[ 24.414978][ T72] ? net_passive_dec+0x190/0x190
[ 24.415168][ T72] ? rcu_is_watching+0x12/0xb0
[ 24.415456][ T72] process_one_work+0xe35/0x1650
[ 24.415647][ T72] ? pwq_dec_nr_in_flight+0x550/0x550
[ 24.415926][ T72] ? assign_work+0x168/0x240
[ 24.416111][ T72] worker_thread+0x591/0xcf0
[ 24.416312][ T72] ? rescuer_thread+0xd10/0xd10
[ 24.416510][ T72] kthread+0x37b/0x5f0
[ 24.416660][ T72] ? kthread_is_per_cpu+0xc0/0xc0
[ 24.416941][ T72] ? ret_from_fork+0x1b/0x270
[ 24.417126][ T72] ? __lock_release+0x5d/0x170
[ 24.417329][ T72] ? rcu_is_watching+0x12/0xb0
[ 24.417528][ T72] ? kthread_is_per_cpu+0xc0/0xc0
[ 24.417710][ T72] ret_from_fork+0x1db/0x270
[ 24.417898][ T72] ? kthread_is_per_cpu+0xc0/0xc0
[ 24.418087][ T72] ret_from_fork_asm+0x11/0x20
[ 24.418378][ T72]
[ 24.418625][ T72] irq event stamp: 8747
[ 24.418766][ T72] hardirqs last enabled at (8747): [] finish_task_switch.isra.0+0x245/0x960
[ 24.419140][ T72] hardirqs last disabled at (8746): [] __schedule+0x94a/0x1b10
[ 24.419449][ T72] softirqs last enabled at (7876): [] unregister_netdevice_many_notify+0x714/0x1c90
[ 24.419781][ T72] softirqs last disabled at (7874): [] dev_mc_flush+0x54/0x90
[ 24.420098][ T72] ---[ end trace 0000000000000000 ]---
[ 24.429742][ T72] bond0: (slave eth0): Releasing backup interface
[ 24.475943][ T72] bond0 (unregistering): Released all slaves