[ 19.473215][ T69] ==================================================================
[ 19.473501][ T69] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 19.473740][ T69] Read of size 1 at addr ffff88800880c6c4 by task kworker/u16:1/69
[ 19.473964][ T69]
[ 19.474056][ T69] CPU: 0 UID: 0 PID: 69 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 19.474063][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.474067][ T69] Workqueue: netns cleanup_net
[ 19.474074][ T69] Call Trace:
[ 19.474078][ T69]
[ 19.474080][ T69] dump_stack_lvl+0x82/0xc0
[ 19.474087][ T69] print_address_description.constprop.0+0x2c/0x3a0
[ 19.474094][ T69] ? kobject_put+0xbb/0xd0
[ 19.474097][ T69] print_report+0xb4/0x270
[ 19.474102][ T69] ? kobject_put+0xbb/0xd0
[ 19.474105][ T69] ? kasan_addr_to_slab+0x21/0x70
[ 19.474109][ T69] ? kobject_put+0xbb/0xd0
[ 19.474112][ T69] kasan_report+0xca/0x100
[ 19.474116][ T69] ? kobject_put+0xbb/0xd0
[ 19.474121][ T69] kobject_put+0xbb/0xd0
[ 19.474125][ T69] netdev_run_todo+0x5f0/0xc60
[ 19.474130][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 19.474135][ T69] ? generic_xdp_install+0x410/0x410
[ 19.474138][ T69] ? net_generic+0xb1/0x1f0
[ 19.474146][ T69] ops_undo_list+0x714/0x890
[ 19.474152][ T69] ? rtnl_net_dumpid_one+0x270/0x270
[ 19.474155][ T69] ? cleanup_net+0x2d6/0x8b0
[ 19.474161][ T69] cleanup_net+0x3b2/0x8b0
[ 19.474165][ T69] ? net_passive_dec+0x190/0x190
[ 19.474170][ T69] ? rcu_is_watching+0x12/0xb0
[ 19.474176][ T69] process_one_work+0xe35/0x1650
[ 19.474184][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 19.474190][ T69] ? assign_work+0x168/0x240
[ 19.474194][ T69] worker_thread+0x591/0xcf0
[ 19.474200][ T69] ? rescuer_thread+0xd10/0xd10
[ 19.474204][ T69] kthread+0x37b/0x5f0
[ 19.474207][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 19.474210][ T69] ? ret_from_fork+0x1b/0x270
[ 19.474214][ T69] ? __lock_release+0x5d/0x170
[ 19.474221][ T69] ? rcu_is_watching+0x12/0xb0
[ 19.474224][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 19.474228][ T69] ret_from_fork+0x1db/0x270
[ 19.474230][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 19.474233][ T69] ret_from_fork_asm+0x11/0x20
[ 19.474243][ T69]
[ 19.474244][ T69]
[ 19.480272][ T69] Allocated by task 266:
[ 19.480404][ T69] kasan_save_stack+0x24/0x40
[ 19.480577][ T69] kasan_save_track+0x14/0x30
[ 19.480736][ T69] __kasan_kmalloc+0x7b/0x90
[ 19.480892][ T69] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 19.481051][ T69] alloc_netdev_mqs+0x7d/0x1370
[ 19.481210][ T69] ip6_tnl_init_net+0x102/0x3f0
[ 19.481379][ T69] ops_init+0x189/0x550
[ 19.481501][ T69] setup_net+0xf1/0x380
[ 19.481625][ T69] copy_net_ns+0x253/0x510
[ 19.481787][ T69] create_new_namespaces+0x35f/0x900
[ 19.481944][ T69] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 19.482103][ T69] ksys_unshare+0x2be/0x6e0
[ 19.482261][ T69] __x64_sys_unshare+0x31/0x40
[ 19.482425][ T69] do_syscall_64+0xc1/0xfd0
[ 19.482581][ T69] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 19.482775][ T69]
[ 19.482857][ T69] Freed by task 69:
[ 19.482978][ T69] kasan_save_stack+0x24/0x40
[ 19.483139][ T69] kasan_save_track+0x14/0x30
[ 19.483291][ T69] __kasan_save_free_info+0x3b/0x60
[ 19.483453][ T69] __kasan_slab_free+0x3f/0x60
[ 19.483617][ T69] kfree+0x21d/0x540
[ 19.483733][ T69] device_release+0x9c/0x210
[ 19.483887][ T69] kobject_cleanup+0xfe/0x360
[ 19.484044][ T69] netdev_run_todo+0x81f/0xc60
[ 19.484298][ T69] ops_undo_list+0x714/0x890
[ 19.484459][ T69] cleanup_net+0x3b2/0x8b0
[ 19.484617][ T69] process_one_work+0xe35/0x1650
[ 19.484775][ T69] worker_thread+0x591/0xcf0
[ 19.484927][ T69] kthread+0x37b/0x5f0
[ 19.485042][ T69] ret_from_fork+0x1db/0x270
[ 19.485195][ T69] ret_from_fork_asm+0x11/0x20
[ 19.485356][ T69]
[ 19.485435][ T69] The buggy address belongs to the object at ffff88800880c000
[ 19.485435][ T69] which belongs to the cache kmalloc-4k of size 4096
[ 19.485888][ T69] The buggy address is located 1732 bytes inside of
[ 19.485888][ T69] freed 4096-byte region [ffff88800880c000, ffff88800880d000)
[ 19.486343][ T69]
[ 19.486421][ T69] The buggy address belongs to the physical page:
[ 19.486617][ T69] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8808
[ 19.486982][ T69] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 19.487218][ T69] flags: 0x80000000000040(head|node=0|zone=1)
[ 19.487432][ T69] page_type: f5(slab)
[ 19.487555][ T69] raw: 0080000000000040 ffff888001043700 ffffea0000213c10 ffffea0000248210
[ 19.487842][ T69] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 19.488129][ T69] head: 0080000000000040 ffff888001043700 ffffea0000213c10 ffffea0000248210
[ 19.488528][ T69] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 19.488806][ T69] head: 0080000000000003 ffffea0000220201 00000000ffffffff 00000000ffffffff
[ 19.489079][ T69] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 19.489366][ T69] page dumped because: kasan: bad access detected
[ 19.489569][ T69]
[ 19.489650][ T69] Memory state around the buggy address:
[ 19.489801][ T69] ffff88800880c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 19.490029][ T69] ffff88800880c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 19.490250][ T69] >ffff88800880c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 19.490489][ T69] ^
[ 19.490681][ T69] ffff88800880c700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 19.490994][ T69] ffff88800880c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 19.491219][ T69] ==================================================================
[ 19.491799][ T69] Disabling lock debugging due to kernel taint
[ 19.492015][ T69] ------------[ cut here ]------------
[ 19.492159][ T69] refcount_t: underflow; use-after-free.
[ 19.492389][ T69] WARNING: CPU: 0 PID: 69 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 19.493274][ T69] Modules linked in: netdevsim psample
[ 19.493452][ T69] CPU: 0 UID: 0 PID: 69 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 19.494339][ T69] Tainted: [B]=BAD_PAGE
[ 19.494468][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.494727][ T69] Workqueue: netns cleanup_net
[ 19.494897][ T69] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 19.495102][ T69] Code: cc 38 03 80 fb 01 0f 87 29 33 d7 fe 83 e3 01 0f 85 51 ff ff ff c6 05 17 cc 38 03 01 90 48 c7 c7 40 ba 65 b7 e8 62 d6 16 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 c0 9d a0 ff e9 ba fe ff ff
[ 19.495735][ T69] RSP: 0018:ffffc900004a7a08 EFLAGS: 00010282
[ 19.495943][ T69] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 19.496173][ T69] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 19.496422][ T69] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff70c0934
[ 19.496731][ T69] R10: 0000000000000003 R11: ffffc900004a7580 R12: 0000000000000001
[ 19.496968][ T69] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 19.497208][ T69] FS: 0000000000000000(0000) GS:ffff8880ad108000(0000) knlGS:0000000000000000
[ 19.497489][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 19.497756][ T69] CR2: 000055ff9ca8d388 CR3: 0000000078349004 CR4: 0000000000772ef0
[ 19.497995][ T69] PKRU: 55555554
[ 19.498119][ T69] Call Trace:
[ 19.498238][ T69]
[ 19.498331][ T69] netdev_run_todo+0x5f0/0xc60
[ 19.498569][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 19.498728][ T69] ? generic_xdp_install+0x410/0x410
[ 19.498896][ T69] ? net_generic+0xb1/0x1f0
[ 19.499053][ T69] ops_undo_list+0x714/0x890
[ 19.499215][ T69] ? rtnl_net_dumpid_one+0x270/0x270
[ 19.499376][ T69] ? cleanup_net+0x2d6/0x8b0
[ 19.499588][ T69] cleanup_net+0x3b2/0x8b0
[ 19.499744][ T69] ? net_passive_dec+0x190/0x190
[ 19.499890][ T69] ? rcu_is_watching+0x12/0xb0
[ 19.500040][ T69] process_one_work+0xe35/0x1650
[ 19.500196][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 19.500355][ T69] ? assign_work+0x168/0x240
[ 19.500503][ T69] worker_thread+0x591/0xcf0
[ 19.500711][ T69] ? rescuer_thread+0xd10/0xd10
[ 19.500864][ T69] kthread+0x37b/0x5f0
[ 19.500976][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 19.501126][ T69] ? ret_from_fork+0x1b/0x270
[ 19.501279][ T69] ? __lock_release+0x5d/0x170
[ 19.501437][ T69] ? rcu_is_watching+0x12/0xb0
[ 19.501645][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 19.501796][ T69] ret_from_fork+0x1db/0x270
[ 19.501942][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 19.502088][ T69] ret_from_fork_asm+0x11/0x20
[ 19.502242][ T69]
[ 19.502363][ T69] irq event stamp: 9767
[ 19.502475][ T69] hardirqs last enabled at (9767): [] finish_task_switch.isra.0+0x245/0x960
[ 19.502847][ T69] hardirqs last disabled at (9766): [] __schedule+0x94a/0x1b10
[ 19.503104][ T69] softirqs last enabled at (9370): [] handle_softirqs+0x352/0x610
[ 19.503373][ T69] softirqs last disabled at (8173): [] irq_exit_rcu+0xab/0x100
[ 19.503698][ T69] ---[ end trace 0000000000000000 ]---
[ 19.580193][ T260] netdevsim netdevsim32027 eni32027np1: renamed from eth0
[ 29.187738][ T255] ------------[ cut here ]------------
[ 29.188027][ T255] kernel BUG at net/core/net-sysfs.c:2246!
[ 29.188322][ T255] Oops: invalid opcode: 0000 [#1] SMP KASAN
[ 29.188588][ T255] CPU: 2 UID: 0 PID: 255 Comm: python3 Tainted: G B W 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 29.188982][ T255] Tainted: [B]=BAD_PAGE, [W]=WARN
[ 29.189178][ T255] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 29.189432][ T255] RIP: 0010:netdev_release+0x6f/0x80
[ 29.189638][ T255] Code: 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 20 48 8b bb b0 fa ff ff e8 9c 81 d1 fe 48 89 ef 5b 5d e9 62 8e d1 fe 90 <0f> 0b e8 0a 65 d8 fe eb bc e8 63 65 d8 fe eb d9 90 f3 0f 1e fa 0f
[ 29.190380][ T255] RSP: 0018:ffffc90000ba78a8 EFLAGS: 00010297
[ 29.190673][ T255] RAX: 0000000000000000 RBX: ffff88800ce82688 RCX: ffffffffb717ab51
[ 29.191002][ T255] RDX: 1ffff110019d04cc RSI: ffffffffb76602c0 RDI: ffff88800ce82660
[ 29.191317][ T255] RBP: ffff88800ce82000 R08: 0000000000000001 R09: ffffed10019d04d8
[ 29.191628][ T255] R10: ffff88800ce826c3 R11: ffffffffb48000b0 R12: ffff8880090e6200
[ 29.191941][ T255] R13: 0000000000000000 R14: dead000000000122 R15: dead000000000100
[ 29.192256][ T255] FS: 00007f2b733a5740(0000) GS:ffff8880ad208000(0000) knlGS:0000000000000000
[ 29.192619][ T255] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 29.192873][ T255] CR2: 00007f2b65d73810 CR3: 000000000b7f6006 CR4: 0000000000772ef0
[ 29.193188][ T255] PKRU: 55555554
[ 29.193347][ T255] Call Trace:
[ 29.193501][ T255]
[ 29.193606][ T255] device_release+0x9c/0x210
[ 29.193815][ T255] kobject_cleanup+0xfe/0x360
[ 29.194011][ T255] netdev_run_todo+0x5f0/0xc60
[ 29.194202][ T255] ? generic_xdp_install+0x410/0x410
[ 29.194397][ T255] ? kfree+0x21d/0x540
[ 29.194546][ T255] nsim_destroy+0x1da/0x700 [netdevsim]
[ 29.194749][ T255] __nsim_dev_port_del+0x17e/0x250 [netdevsim]
[ 29.194987][ T255] nsim_dev_reload_destroy+0xdc/0x470 [netdevsim]
[ 29.195225][ T255] nsim_drv_remove+0x51/0x1d0 [netdevsim]
[ 29.195419][ T255] device_release_driver_internal+0x3bb/0x580
[ 29.195647][ T255] ? klist_put+0xb1/0x170
[ 29.195791][ T255] bus_remove_device+0x1ee/0x3f0
[ 29.195977][ T255] device_del+0x33b/0x8c0
[ 29.196120][ T255] ? __device_link_del+0x3c0/0x3c0
[ 29.196306][ T255] ? kernfs_fop_write_iter+0x207/0x490
[ 29.196495][ T255] device_unregister+0x17/0xa0
[ 29.196683][ T255] del_device_store+0x2f2/0x4f0 [netdevsim]
[ 29.196923][ T255] ? sysfs_file_kobj+0xb5/0x1f0
[ 29.197110][ T255] ? rcu_is_watching+0x12/0xb0
[ 29.197303][ T255] ? nsim_bus_dev_numvfs_show+0x60/0x60 [netdevsim]
[ 29.197547][ T255] ? sysfs_file_kobj+0xbf/0x1f0
[ 29.197731][ T255] ? sysfs_file_ops+0x120/0x120
[ 29.197915][ T255] kernfs_fop_write_iter+0x2f2/0x490
[ 29.198101][ T255] vfs_write+0xaae/0x12c0
[ 29.198248][ T255] ? kernel_write+0x6b0/0x6b0
[ 29.198452][ T255] ? lock_vma_under_rcu+0x138/0x3d0
[ 29.198642][ T255] ? __handle_mm_fault+0x5d0/0x5d0
[ 29.198836][ T255] ksys_write+0xf7/0x1d0
[ 29.198977][ T255] ? __ia32_sys_read+0xb0/0xb0
[ 29.199161][ T255] ? do_user_addr_fault+0x955/0xe00
[ 29.199357][ T255] do_syscall_64+0xc1/0xfd0
[ 29.199545][ T255] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 29.199777][ T255] RIP: 0033:0x7f2b73584257
[ 29.199971][ T255] Code: 0f 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
[ 29.200639][ T255] RSP: 002b:00007ffd04d6b8d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 29.200921][ T255] RAX: ffffffffffffffda RBX: 00007f2b733a56e0 RCX: 00007f2b73584257
[ 29.201201][ T255] RDX: 0000000000000005 RSI: 0000559ea6a57090 RDI: 0000000000000005
[ 29.201493][ T255] RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000002
[ 29.201804][ T255] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f2b65161940
[ 29.202123][ T255] R13: 0000559ea6a57090 R14: 0000000000000005 R15: 0000559ea65869c0
[ 29.202455][ T255]
[ 29.202627][ T255] Modules linked in: netdevsim psample
[ 29.202925][ T255] ---[ end trace 0000000000000000 ]---
[ 29.203203][ T255] RIP: 0010:netdev_release+0x6f/0x80
[ 29.203463][ T255] Code: 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 20 48 8b bb b0 fa ff ff e8 9c 81 d1 fe 48 89 ef 5b 5d e9 62 8e d1 fe 90 <0f> 0b e8 0a 65 d8 fe eb bc e8 63 65 d8 fe eb d9 90 f3 0f 1e fa 0f
[ 29.205103][ T255] RSP: 0018:ffffc90000ba78a8 EFLAGS: 00010297
[ 29.205562][ T255] RAX: 0000000000000000 RBX: ffff88800ce82688 RCX: ffffffffb717ab51
[ 29.205919][ T255] RDX: 1ffff110019d04cc RSI: ffffffffb76602c0 RDI: ffff88800ce82660
[ 29.206265][ T255] RBP: ffff88800ce82000 R08: 0000000000000001 R09: ffffed10019d04d8
[ 29.206620][ T255] R10: ffff88800ce826c3 R11: ffffffffb48000b0 R12: ffff8880090e6200
[ 29.206976][ T255] R13: 0000000000000000 R14: dead000000000122 R15: dead000000000100
[ 29.207334][ T255] FS: 00007f2b733a5740(0000) GS:ffff8880ad208000(0000) knlGS:0000000000000000
[ 29.207748][ T255] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 29.208048][ T255] CR2: 00007f2b65d73810 CR3: 000000000b7f6006 CR4: 0000000000772ef0
[ 29.208396][ T255] PKRU: 55555554
[ 29.209975][ T255] Kernel panic - not syncing: Fatal exception
[ 29.210367][ T255] Kernel Offset: 0x33800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[ 29.210843][ T255] ---[ end Kernel panic - not syncing: Fatal exception ]---
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