[ 17.639690][ T12] ==================================================================
[ 17.640193][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 17.640559][ T12] Read of size 1 at addr ffff888005151694 by task kworker/u16:0/12
[ 17.641034][ T12]
[ 17.641174][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.641182][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.641186][ T12] Workqueue: netns cleanup_net
[ 17.641198][ T12] Call Trace:
[ 17.641201][ T12]
[ 17.641206][ T12] dump_stack_lvl+0x82/0xc0
[ 17.641216][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 17.641232][ T12] ? kobject_put+0xbb/0xd0
[ 17.641237][ T12] print_report+0xb4/0x270
[ 17.641243][ T12] ? kobject_put+0xbb/0xd0
[ 17.641247][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 17.641252][ T12] ? kobject_put+0xbb/0xd0
[ 17.641256][ T12] kasan_report+0xca/0x100
[ 17.641262][ T12] ? kobject_put+0xbb/0xd0
[ 17.641270][ T12] kobject_put+0xbb/0xd0
[ 17.641274][ T12] netdev_run_todo+0x5f0/0xc60
[ 17.641282][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 17.641288][ T12] ? generic_xdp_install+0x410/0x410
[ 17.641298][ T12] ops_undo_list+0x714/0x890
[ 17.641305][ T12] ? netns_get+0x110/0x110
[ 17.641308][ T12] ? cleanup_net+0x2d6/0x830
[ 17.641316][ T12] cleanup_net+0x3b2/0x830
[ 17.641322][ T12] ? net_passive_dec+0x190/0x190
[ 17.641328][ T12] ? rcu_is_watching+0x12/0xb0
[ 17.641340][ T12] process_one_work+0xe35/0x1650
[ 17.641354][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 17.641364][ T12] ? assign_work+0x168/0x240
[ 17.641371][ T12] worker_thread+0x591/0xcf0
[ 17.641381][ T12] ? rescuer_thread+0xd10/0xd10
[ 17.641385][ T12] kthread+0x37b/0x5f0
[ 17.641391][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 17.641394][ T12] ? ret_from_fork+0x1b/0x270
[ 17.641401][ T12] ? __lock_release+0x5d/0x170
[ 17.641409][ T12] ? rcu_is_watching+0x12/0xb0
[ 17.641414][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 17.641419][ T12] ret_from_fork+0x1db/0x270
[ 17.641423][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 17.641427][ T12] ret_from_fork_asm+0x11/0x20
[ 17.641440][ T12]
[ 17.641442][ T12]
[ 17.652101][ T12] Allocated by task 229:
[ 17.652324][ T12] kasan_save_stack+0x24/0x40
[ 17.652629][ T12] kasan_save_track+0x14/0x30
[ 17.652913][ T12] __kasan_kmalloc+0x7b/0x90
[ 17.653205][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 17.653500][ T12] alloc_netdev_mqs+0x7d/0x1310
[ 17.653762][ T12] sit_init_net+0x169/0x550
[ 17.654056][ T12] ops_init+0x189/0x550
[ 17.654270][ T12] setup_net+0xf1/0x380
[ 17.654488][ T12] copy_net_ns+0x21a/0x380
[ 17.654794][ T12] create_new_namespaces+0x35f/0x900
[ 17.655079][ T12] unshare_nsproxy_namespaces+0x89/0x120
[ 17.655365][ T12] ksys_unshare+0x2a3/0x660
[ 17.655670][ T12] __x64_sys_unshare+0x31/0x40
[ 17.655964][ T12] do_syscall_64+0xc1/0xfd0
[ 17.656260][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.656611][ T12]
[ 17.656765][ T12] Freed by task 12:
[ 17.656981][ T12] kasan_save_stack+0x24/0x40
[ 17.657296][ T12] kasan_save_track+0x14/0x30
[ 17.657589][ T12] __kasan_save_free_info+0x3b/0x60
[ 17.657874][ T12] __kasan_slab_free+0x3f/0x60
[ 17.658163][ T12] kfree+0x21d/0x540
[ 17.658378][ T12] device_release+0x9c/0x210
[ 17.658663][ T12] kobject_cleanup+0xfe/0x360
[ 17.658929][ T12] netdev_run_todo+0x81f/0xc60
[ 17.659212][ T12] ops_undo_list+0x714/0x890
[ 17.659482][ T12] cleanup_net+0x3b2/0x830
[ 17.659760][ T12] process_one_work+0xe35/0x1650
[ 17.660028][ T12] worker_thread+0x591/0xcf0
[ 17.660306][ T12] kthread+0x37b/0x5f0
[ 17.660522][ T12] ret_from_fork+0x1db/0x270
[ 17.660812][ T12] ret_from_fork_asm+0x11/0x20
[ 17.661104][ T12]
[ 17.661251][ T12] The buggy address belongs to the object at ffff888005151000
[ 17.661251][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 17.661951][ T12] The buggy address is located 1684 bytes inside of
[ 17.661951][ T12] freed 4096-byte region [ffff888005151000, ffff888005152000)
[ 17.662616][ T12]
[ 17.662754][ T12] The buggy address belongs to the physical page:
[ 17.663094][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5150
[ 17.663583][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 17.664024][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 17.664411][ T12] page_type: f5(slab)
[ 17.664632][ T12] raw: 0080000000000040 ffff888001043700 ffffea000007f610 ffffea0000158210
[ 17.665169][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 17.665638][ T12] head: 0080000000000040 ffff888001043700 ffffea000007f610 ffffea0000158210
[ 17.666165][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 17.666673][ T12] head: 0080000000000003 ffffea0000145401 00000000ffffffff 00000000ffffffff
[ 17.667165][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 17.667652][ T12] page dumped because: kasan: bad access detected
[ 17.667983][ T12]
[ 17.668122][ T12] Memory state around the buggy address:
[ 17.668389][ T12] ffff888005151580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 17.668792][ T12] ffff888005151600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 17.669196][ T12] >ffff888005151680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 17.669606][ T12] ^
[ 17.669880][ T12] ffff888005151700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 17.670314][ T12] ffff888005151780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 17.670715][ T12] ==================================================================
[ 17.671700][ T12] Disabling lock debugging due to kernel taint
[ 17.672120][ T12] ------------[ cut here ]------------
[ 17.672385][ T12] refcount_t: underflow; use-after-free.
[ 17.672693][ T12] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 17.673223][ T12] Modules linked in: veth
[ 17.673445][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.674920][ T12] Tainted: [B]=BAD_PAGE
[ 17.675156][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.675494][ T12] Workqueue: netns cleanup_net
[ 17.675797][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 17.676182][ 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 85 9a 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
[ 17.677198][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 17.677559][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 17.678004][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 17.678433][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff363e134
[ 17.678860][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 17.679277][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 17.679687][ T12] FS: 0000000000000000(0000) GS:ffff888099c10000(0000) knlGS:0000000000000000
[ 17.680197][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 17.680540][ T12] CR2: 000055ca017e96f8 CR3: 00000000024a0001 CR4: 0000000000772ef0
[ 17.680951][ T12] PKRU: 55555554
[ 17.681168][ T12] Call Trace:
[ 17.681371][ T12]
[ 17.681502][ T12] netdev_run_todo+0x5f0/0xc60
[ 17.681788][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 17.682076][ T12] ? generic_xdp_install+0x410/0x410
[ 17.682364][ T12] ops_undo_list+0x714/0x890
[ 17.682647][ T12] ? netns_get+0x110/0x110
[ 17.682940][ T12] ? cleanup_net+0x2d6/0x830
[ 17.683231][ T12] cleanup_net+0x3b2/0x830
[ 17.683687][ T12] ? net_passive_dec+0x190/0x190
[ 17.683993][ T12] ? rcu_is_watching+0x12/0xb0
[ 17.684297][ T12] process_one_work+0xe35/0x1650
[ 17.684591][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 17.684881][ T12] ? assign_work+0x168/0x240
[ 17.685160][ T12] worker_thread+0x591/0xcf0
[ 17.685426][ T12] ? rescuer_thread+0xd10/0xd10
[ 17.685696][ T12] kthread+0x37b/0x5f0
[ 17.686063][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 17.686323][ T12] ? ret_from_fork+0x1b/0x270
[ 17.686558][ T12] ? __lock_release+0x5d/0x170
[ 17.686779][ T12] ? rcu_is_watching+0x12/0xb0
[ 17.687059][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 17.687246][ T12] ret_from_fork+0x1db/0x270
[ 17.687441][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 17.687632][ T12] ret_from_fork_asm+0x11/0x20
[ 17.687837][ T12]
[ 17.687986][ T12] irq event stamp: 2721
[ 17.688136][ T12] hardirqs last enabled at (2721): [] finish_task_switch.isra.0+0x245/0x960
[ 17.688533][ T12] hardirqs last disabled at (2720): [] __schedule+0x94a/0x1b10
[ 17.688975][ T12] softirqs last enabled at (2520): [] handle_softirqs+0x352/0x610
[ 17.689317][ T12] softirqs last disabled at (2513): [] irq_exit_rcu+0xab/0x100
[ 17.689777][ T12] ---[ end trace 0000000000000000 ]---