[ 16.397719][ T12] ==================================================================
[ 16.398159][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 16.398461][ T12] Read of size 1 at addr ffff888002741694 by task kworker/u16:0/12
[ 16.398799][ T12]
[ 16.398904][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.398910][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.398913][ T12] Workqueue: netns cleanup_net
[ 16.398923][ T12] Call Trace:
[ 16.398925][ T12]
[ 16.398929][ T12] dump_stack_lvl+0x82/0xc0
[ 16.398938][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 16.398948][ T12] ? kobject_put+0xbb/0xd0
[ 16.398951][ T12] print_report+0xb4/0x270
[ 16.398955][ T12] ? kobject_put+0xbb/0xd0
[ 16.398958][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 16.398962][ T12] ? kobject_put+0xbb/0xd0
[ 16.398965][ T12] kasan_report+0xca/0x100
[ 16.398969][ T12] ? kobject_put+0xbb/0xd0
[ 16.398974][ T12] kobject_put+0xbb/0xd0
[ 16.398978][ T12] netdev_run_todo+0x5f0/0xc60
[ 16.398984][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 16.398988][ T12] ? generic_xdp_install+0x410/0x410
[ 16.398999][ T12] ops_undo_list+0x714/0x890
[ 16.399006][ T12] ? netns_get+0x110/0x110
[ 16.399008][ T12] ? cleanup_net+0x2d6/0x830
[ 16.399016][ T12] cleanup_net+0x3b2/0x830
[ 16.399020][ T12] ? net_passive_dec+0x190/0x190
[ 16.399024][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.399034][ T12] process_one_work+0xe35/0x1650
[ 16.399047][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 16.399057][ T12] ? assign_work+0x168/0x240
[ 16.399064][ T12] worker_thread+0x591/0xcf0
[ 16.399072][ T12] ? rescuer_thread+0xd10/0xd10
[ 16.399077][ T12] kthread+0x37b/0x5f0
[ 16.399083][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.399086][ T12] ? ret_from_fork+0x1b/0x270
[ 16.399093][ T12] ? __lock_release+0x5d/0x170
[ 16.399100][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.399103][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.399106][ T12] ret_from_fork+0x1db/0x270
[ 16.399109][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.399112][ T12] ret_from_fork_asm+0x11/0x20
[ 16.399121][ T12]
[ 16.399122][ T12]
[ 16.406576][ T12] Allocated by task 228:
[ 16.406753][ T12] kasan_save_stack+0x24/0x40
[ 16.406974][ T12] kasan_save_track+0x14/0x30
[ 16.407200][ T12] __kasan_kmalloc+0x7b/0x90
[ 16.407423][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 16.407616][ T12] alloc_netdev_mqs+0x7d/0x1310
[ 16.407825][ T12] sit_init_net+0x169/0x550
[ 16.408025][ T12] ops_init+0x189/0x550
[ 16.408178][ T12] setup_net+0xf1/0x380
[ 16.408309][ T12] copy_net_ns+0x21a/0x380
[ 16.408487][ T12] create_new_namespaces+0x35f/0x900
[ 16.408669][ T12] unshare_nsproxy_namespaces+0x89/0x120
[ 16.408870][ T12] ksys_unshare+0x2a3/0x660
[ 16.409057][ T12] __x64_sys_unshare+0x31/0x40
[ 16.409251][ T12] do_syscall_64+0xc1/0xfd0
[ 16.409440][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.409665][ T12]
[ 16.409778][ T12] Freed by task 12:
[ 16.409922][ T12] kasan_save_stack+0x24/0x40
[ 16.410120][ T12] kasan_save_track+0x14/0x30
[ 16.410291][ T12] __kasan_save_free_info+0x3b/0x60
[ 16.410467][ T12] __kasan_slab_free+0x3f/0x60
[ 16.410636][ T12] kfree+0x21d/0x540
[ 16.410800][ T12] device_release+0x9c/0x210
[ 16.411005][ T12] kobject_cleanup+0xfe/0x360
[ 16.411195][ T12] netdev_run_todo+0x81f/0xc60
[ 16.411372][ T12] ops_undo_list+0x714/0x890
[ 16.411541][ T12] cleanup_net+0x3b2/0x830
[ 16.411737][ T12] process_one_work+0xe35/0x1650
[ 16.411938][ T12] worker_thread+0x591/0xcf0
[ 16.412128][ T12] kthread+0x37b/0x5f0
[ 16.412256][ T12] ret_from_fork+0x1db/0x270
[ 16.412442][ T12] ret_from_fork_asm+0x11/0x20
[ 16.412611][ T12]
[ 16.412720][ T12] The buggy address belongs to the object at ffff888002741000
[ 16.412720][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 16.413196][ T12] The buggy address is located 1684 bytes inside of
[ 16.413196][ T12] freed 4096-byte region [ffff888002741000, ffff888002742000)
[ 16.413632][ T12]
[ 16.413751][ T12] The buggy address belongs to the physical page:
[ 16.413989][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2740
[ 16.414320][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 16.414582][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 16.414813][ T12] page_type: f5(slab)
[ 16.414964][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000243410 ffffea000009c010
[ 16.415292][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 16.415601][ T12] head: 0080000000000040 ffff888001043700 ffffea0000243410 ffffea000009c010
[ 16.415919][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 16.416243][ T12] head: 0080000000000003 ffffea000009d001 00000000ffffffff 00000000ffffffff
[ 16.416553][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 16.416882][ T12] page dumped because: kasan: bad access detected
[ 16.417115][ T12]
[ 16.417210][ T12] Memory state around the buggy address:
[ 16.417402][ T12] ffff888002741580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.417698][ T12] ffff888002741600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.417965][ T12] >ffff888002741680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.418234][ T12] ^
[ 16.418409][ T12] ffff888002741700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.418655][ T12] ffff888002741780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.418935][ T12] ==================================================================
[ 16.419429][ T12] Disabling lock debugging due to kernel taint
[ 16.419652][ T12] ------------[ cut here ]------------
[ 16.419831][ T12] refcount_t: underflow; use-after-free.
[ 16.420053][ T12] WARNING: CPU: 1 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.420463][ T12] Modules linked in: veth
[ 16.420624][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.421085][ T12] Tainted: [B]=BAD_PAGE
[ 16.421219][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.421612][ T12] Workqueue: netns cleanup_net
[ 16.421843][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.422095][ T12] Code: 48 92 02 80 fb 01 0f 87 cb 7d d9 fe 83 e3 01 0f 85 51 ff ff ff c6 05 75 48 92 02 01 90 48 c7 c7 a0 8d 25 91 e8 42 93 18 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 c0 37 a1 ff e9 ba fe ff ff
[ 16.422742][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 16.422978][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.423284][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.423551][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff237e134
[ 16.423845][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 16.424131][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.424510][ T12] FS: 0000000000000000(0000) GS:ffff8880a3290000(0000) knlGS:0000000000000000
[ 16.424838][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.425171][ T12] CR2: 00007f130e8040c8 CR3: 00000000097f4002 CR4: 0000000000772ef0
[ 16.425445][ T12] PKRU: 55555554
[ 16.425663][ T12] Call Trace:
[ 16.425813][ T12]
[ 16.425916][ T12] netdev_run_todo+0x5f0/0xc60
[ 16.426217][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 16.426405][ T12] ? generic_xdp_install+0x410/0x410
[ 16.426569][ T12] ops_undo_list+0x714/0x890
[ 16.426748][ T12] ? netns_get+0x110/0x110
[ 16.427011][ T12] ? cleanup_net+0x2d6/0x830
[ 16.427189][ T12] cleanup_net+0x3b2/0x830
[ 16.427364][ T12] ? net_passive_dec+0x190/0x190
[ 16.427533][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.427808][ T12] process_one_work+0xe35/0x1650
[ 16.427983][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 16.428163][ T12] ? assign_work+0x168/0x240
[ 16.428433][ T12] worker_thread+0x591/0xcf0
[ 16.428600][ T12] ? rescuer_thread+0xd10/0xd10
[ 16.428792][ T12] kthread+0x37b/0x5f0
[ 16.428924][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.429109][ T12] ? ret_from_fork+0x1b/0x270
[ 16.429371][ T12] ? __lock_release+0x5d/0x170
[ 16.429535][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.429712][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.429918][ T12] ret_from_fork+0x1db/0x270
[ 16.430190][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.430366][ T12] ret_from_fork_asm+0x11/0x20
[ 16.430531][ T12]
[ 16.430665][ T12] irq event stamp: 4705
[ 16.430905][ T12] hardirqs last enabled at (4705): [] finish_task_switch.isra.0+0x245/0x960
[ 16.431247][ T12] hardirqs last disabled at (4704): [] __schedule+0x94a/0x1b10
[ 16.431637][ T12] softirqs last enabled at (4620): [] handle_softirqs+0x352/0x610
[ 16.431967][ T12] softirqs last disabled at (4613): [] irq_exit_rcu+0xab/0x100
[ 16.432273][ T12] ---[ end trace 0000000000000000 ]---