[ 14.683529][ T12] ==================================================================
[ 14.683859][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 14.684127][ T12] Read of size 1 at addr ffff888006159694 by task kworker/u16:0/12
[ 14.684358][ T12]
[ 14.684446][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 14.684451][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 14.684455][ T12] Workqueue: netns cleanup_net
[ 14.684463][ T12] Call Trace:
[ 14.684465][ T12]
[ 14.684468][ T12] dump_stack_lvl+0x82/0xc0
[ 14.684473][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 14.684482][ T12] ? kobject_put+0xbb/0xd0
[ 14.684486][ T12] print_report+0xb4/0x270
[ 14.684490][ T12] ? kobject_put+0xbb/0xd0
[ 14.684493][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 14.684497][ T12] ? kobject_put+0xbb/0xd0
[ 14.684499][ T12] kasan_report+0xca/0x100
[ 14.684504][ T12] ? kobject_put+0xbb/0xd0
[ 14.684509][ T12] kobject_put+0xbb/0xd0
[ 14.684512][ T12] netdev_run_todo+0x5f0/0xc60
[ 14.684518][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 14.684522][ T12] ? generic_xdp_install+0x410/0x410
[ 14.684529][ T12] ops_undo_list+0x714/0x890
[ 14.684533][ T12] ? netns_get+0x110/0x110
[ 14.684535][ T12] ? cleanup_net+0x2d6/0x830
[ 14.684540][ T12] cleanup_net+0x3b2/0x830
[ 14.684543][ T12] ? net_passive_dec+0x190/0x190
[ 14.684547][ T12] ? rcu_is_watching+0x12/0xb0
[ 14.684554][ T12] process_one_work+0xe35/0x1650
[ 14.684562][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 14.684568][ T12] ? assign_work+0x168/0x240
[ 14.684572][ T12] worker_thread+0x591/0xcf0
[ 14.684577][ T12] ? rescuer_thread+0xd10/0xd10
[ 14.684580][ T12] kthread+0x37b/0x5f0
[ 14.684584][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.684586][ T12] ? ret_from_fork+0x1b/0x270
[ 14.684593][ T12] ? __lock_release+0x5d/0x170
[ 14.684602][ T12] ? rcu_is_watching+0x12/0xb0
[ 14.684606][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.684610][ T12] ret_from_fork+0x1db/0x270
[ 14.684614][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.684618][ T12] ret_from_fork_asm+0x11/0x20
[ 14.684630][ T12]
[ 14.684632][ T12]
[ 14.692871][ T12] Allocated by task 230:
[ 14.693080][ T12] kasan_save_stack+0x24/0x40
[ 14.693362][ T12] kasan_save_track+0x14/0x30
[ 14.693642][ T12] __kasan_kmalloc+0x7b/0x90
[ 14.693925][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 14.694201][ T12] alloc_netdev_mqs+0x7d/0x1310
[ 14.694476][ T12] sit_init_net+0x169/0x550
[ 14.694750][ T12] ops_init+0x189/0x550
[ 14.694972][ T12] setup_net+0xf1/0x380
[ 14.695177][ T12] copy_net_ns+0x21a/0x380
[ 14.695442][ T12] create_new_namespaces+0x35f/0x900
[ 14.695708][ T12] unshare_nsproxy_namespaces+0x89/0x120
[ 14.695975][ T12] ksys_unshare+0x2a3/0x660
[ 14.696240][ T12] __x64_sys_unshare+0x31/0x40
[ 14.696502][ T12] do_syscall_64+0xc1/0xfd0
[ 14.696780][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 14.697110][ T12]
[ 14.697247][ T12] Freed by task 12:
[ 14.697444][ T12] kasan_save_stack+0x24/0x40
[ 14.697709][ T12] kasan_save_track+0x14/0x30
[ 14.697977][ T12] __kasan_save_free_info+0x3b/0x60
[ 14.698240][ T12] __kasan_slab_free+0x3f/0x60
[ 14.698502][ T12] kfree+0x21d/0x540
[ 14.698710][ T12] device_release+0x9c/0x210
[ 14.698984][ T12] kobject_cleanup+0xfe/0x360
[ 14.699258][ T12] netdev_run_todo+0x81f/0xc60
[ 14.699532][ T12] ops_undo_list+0x714/0x890
[ 14.699836][ T12] cleanup_net+0x3b2/0x830
[ 14.700113][ T12] process_one_work+0xe35/0x1650
[ 14.700386][ T12] worker_thread+0x591/0xcf0
[ 14.700651][ T12] kthread+0x37b/0x5f0
[ 14.700861][ T12] ret_from_fork+0x1db/0x270
[ 14.701133][ T12] ret_from_fork_asm+0x11/0x20
[ 14.701397][ T12]
[ 14.701538][ T12] The buggy address belongs to the object at ffff888006159000
[ 14.701538][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 14.702188][ T12] The buggy address is located 1684 bytes inside of
[ 14.702188][ T12] freed 4096-byte region [ffff888006159000, ffff88800615a000)
[ 14.702829][ T12]
[ 14.702967][ T12] The buggy address belongs to the physical page:
[ 14.703296][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6158
[ 14.703783][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 14.704187][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 14.704540][ T12] page_type: f5(slab)
[ 14.704753][ T12] raw: 0080000000000040 ffff888001043700 ffffea00002fbc10 ffffea000016fa10
[ 14.705263][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 14.705749][ T12] head: 0080000000000040 ffff888001043700 ffffea00002fbc10 ffffea000016fa10
[ 14.706236][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 14.706709][ T12] head: 0080000000000003 ffffea0000185601 00000000ffffffff 00000000ffffffff
[ 14.707195][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 14.707694][ T12] page dumped because: kasan: bad access detected
[ 14.708026][ T12]
[ 14.708159][ T12] Memory state around the buggy address:
[ 14.708413][ T12] ffff888006159580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.708829][ T12] ffff888006159600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.709238][ T12] >ffff888006159680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.709622][ T12] ^
[ 14.709882][ T12] ffff888006159700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.710268][ T12] ffff888006159780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.710652][ T12] ==================================================================
[ 14.711255][ T12] Disabling lock debugging due to kernel taint
[ 14.711589][ T12] ------------[ cut here ]------------
[ 14.712662][ T12] refcount_t: underflow; use-after-free.
[ 14.712977][ T12] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 14.713445][ T12] Modules linked in: veth
[ 14.713671][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 14.714286][ T12] Tainted: [B]=BAD_PAGE
[ 14.714493][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 14.714829][ T12] Workqueue: netns cleanup_net
[ 14.715133][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 14.715491][ 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 c5 98 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
[ 14.716485][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 14.716843][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 14.717248][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 14.717669][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff32be134
[ 14.718081][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 14.718486][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 14.718909][ T12] FS: 0000000000000000(0000) GS:ffff88809b810000(0000) knlGS:0000000000000000
[ 14.719392][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 14.719741][ T12] CR2: 00007f81b2ae2100 CR3: 0000000009200003 CR4: 0000000000772ef0
[ 14.720148][ T12] PKRU: 55555554
[ 14.720352][ T12] Call Trace:
[ 14.720558][ T12]
[ 14.720715][ T12] netdev_run_todo+0x5f0/0xc60
[ 14.720998][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 14.721280][ T12] ? generic_xdp_install+0x410/0x410
[ 14.721554][ T12] ops_undo_list+0x714/0x890
[ 14.721836][ T12] ? netns_get+0x110/0x110
[ 14.722156][ T12] ? cleanup_net+0x2d6/0x830
[ 14.722433][ T12] cleanup_net+0x3b2/0x830
[ 14.722738][ T12] ? net_passive_dec+0x190/0x190
[ 14.722997][ T12] ? rcu_is_watching+0x12/0xb0
[ 14.723260][ T12] process_one_work+0xe35/0x1650
[ 14.723528][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 14.723847][ T12] ? assign_work+0x168/0x240
[ 14.724116][ T12] worker_thread+0x591/0xcf0
[ 14.724391][ T12] ? rescuer_thread+0xd10/0xd10
[ 14.724690][ T12] kthread+0x37b/0x5f0
[ 14.724887][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.725167][ T12] ? ret_from_fork+0x1b/0x270
[ 14.725428][ T12] ? __lock_release+0x5d/0x170
[ 14.725705][ T12] ? rcu_is_watching+0x12/0xb0
[ 14.725966][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.726237][ T12] ret_from_fork+0x1db/0x270
[ 14.726493][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.726759][ T12] ret_from_fork_asm+0x11/0x20
[ 14.727065][ T12]
[ 14.727272][ T12] irq event stamp: 2653
[ 14.727487][ T12] hardirqs last enabled at (2653): [] finish_task_switch.isra.0+0x245/0x960
[ 14.728009][ T12] hardirqs last disabled at (2652): [] __schedule+0x94a/0x1b10
[ 14.728466][ T12] softirqs last enabled at (1788): [] unregister_netdevice_many_notify+0x711/0x1b30
[ 14.729040][ T12] softirqs last disabled at (1786): [] dev_mc_flush+0x54/0x90
[ 14.729464][ T12] ---[ end trace 0000000000000000 ]---