[ 19.698985][ T257] ip (257) used greatest stack depth: 23872 bytes left
[ 45.749138][ T70] ==================================================================
[ 45.749447][ T70] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 45.749762][ T70] Read of size 1 at addr ffff8880055716ac by task kworker/u16:1/70
[ 45.750074][ T70]
[ 45.750183][ T70] CPU: 0 UID: 0 PID: 70 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 45.750188][ T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 45.750192][ T70] Workqueue: netns cleanup_net
[ 45.750199][ T70] Call Trace:
[ 45.750201][ T70]
[ 45.750204][ T70] dump_stack_lvl+0x82/0xc0
[ 45.750211][ T70] print_address_description.constprop.0+0x2c/0x3a0
[ 45.750219][ T70] ? kobject_put+0xbb/0xd0
[ 45.750224][ T70] print_report+0xb4/0x270
[ 45.750227][ T70] ? kobject_put+0xbb/0xd0
[ 45.750231][ T70] ? kasan_addr_to_slab+0x21/0x70
[ 45.750235][ T70] ? kobject_put+0xbb/0xd0
[ 45.750238][ T70] kasan_report+0xca/0x100
[ 45.750242][ T70] ? kobject_put+0xbb/0xd0
[ 45.750248][ T70] kobject_put+0xbb/0xd0
[ 45.750252][ T70] netdev_run_todo+0x5f0/0xc60
[ 45.750258][ T70] ? dev_ingress_queue_create+0x190/0x190
[ 45.750262][ T70] ? generic_xdp_install+0x410/0x410
[ 45.750269][ T70] ops_undo_list+0x714/0x890
[ 45.750278][ T70] ? netns_get+0x110/0x110
[ 45.750281][ T70] ? cleanup_net+0x2d6/0x830
[ 45.750286][ T70] cleanup_net+0x3b2/0x830
[ 45.750289][ T70] ? net_passive_dec+0x190/0x190
[ 45.750293][ T70] ? rcu_is_watching+0x12/0xb0
[ 45.750303][ T70] process_one_work+0xe35/0x1650
[ 45.750318][ T70] ? pwq_dec_nr_in_flight+0x550/0x550
[ 45.750329][ T70] ? assign_work+0x168/0x240
[ 45.750336][ T70] worker_thread+0x591/0xcf0
[ 45.750345][ T70] ? rescuer_thread+0xd10/0xd10
[ 45.750350][ T70] kthread+0x37b/0x5f0
[ 45.750358][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 45.750362][ T70] ? ret_from_fork+0x1b/0x270
[ 45.750369][ T70] ? __lock_release+0x5d/0x170
[ 45.750378][ T70] ? rcu_is_watching+0x12/0xb0
[ 45.750382][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 45.750387][ T70] ret_from_fork+0x1db/0x270
[ 45.750392][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 45.750397][ T70] ret_from_fork_asm+0x11/0x20
[ 45.750413][ T70]
[ 45.750415][ T70]
[ 45.758451][ T70] Allocated by task 256:
[ 45.758598][ T70] kasan_save_stack+0x24/0x40
[ 45.758793][ T70] kasan_save_track+0x14/0x30
[ 45.758985][ T70] __kasan_kmalloc+0x7b/0x90
[ 45.759162][ T70] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 45.759342][ T70] alloc_netdev_mqs+0x7d/0x1370
[ 45.759572][ T70] sit_init_net+0x169/0x550
[ 45.759759][ T70] ops_init+0x189/0x550
[ 45.759900][ T70] setup_net+0xf1/0x380
[ 45.760097][ T70] copy_net_ns+0x21a/0x380
[ 45.760305][ T70] create_new_namespaces+0x35f/0x900
[ 45.760484][ T70] unshare_nsproxy_namespaces+0x89/0x120
[ 45.760664][ T70] ksys_unshare+0x2a3/0x660
[ 45.760878][ T70] __x64_sys_unshare+0x31/0x40
[ 45.761076][ T70] do_syscall_64+0xc1/0xfd0
[ 45.761262][ T70] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 45.761483][ T70]
[ 45.761583][ T70] Freed by task 70:
[ 45.761736][ T70] kasan_save_stack+0x24/0x40
[ 45.762027][ T70] kasan_save_track+0x14/0x30
[ 45.762223][ T70] __kasan_save_free_info+0x3b/0x60
[ 45.762424][ T70] __kasan_slab_free+0x3f/0x60
[ 45.762640][ T70] kfree+0x21d/0x540
[ 45.762901][ T70] device_release+0x9c/0x210
[ 45.763145][ T70] kobject_cleanup+0xfe/0x360
[ 45.763304][ T70] netdev_run_todo+0x81f/0xc60
[ 45.763458][ T70] ops_undo_list+0x714/0x890
[ 45.763753][ T70] cleanup_net+0x3b2/0x830
[ 45.763976][ T70] process_one_work+0xe35/0x1650
[ 45.764133][ T70] worker_thread+0x591/0xcf0
[ 45.764286][ T70] kthread+0x37b/0x5f0
[ 45.764502][ T70] ret_from_fork+0x1db/0x270
[ 45.764710][ T70] ret_from_fork_asm+0x11/0x20
[ 45.764938][ T70]
[ 45.765084][ T70] The buggy address belongs to the object at ffff888005571000
[ 45.765084][ T70] which belongs to the cache kmalloc-4k of size 4096
[ 45.765558][ T70] The buggy address is located 1708 bytes inside of
[ 45.765558][ T70] freed 4096-byte region [ffff888005571000, ffff888005572000)
[ 45.765995][ T70]
[ 45.766227][ T70] The buggy address belongs to the physical page:
[ 45.766479][ T70] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5570
[ 45.766827][ T70] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 45.767208][ T70] flags: 0x80000000000040(head|node=0|zone=1)
[ 45.767479][ T70] page_type: f5(slab)
[ 45.767619][ T70] raw: 0080000000000040 ffff888001043700 ffffea000024c010 ffffea0000176410
[ 45.768060][ T70] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 45.768369][ T70] head: 0080000000000040 ffff888001043700 ffffea000024c010 ffffea0000176410
[ 45.768778][ T70] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 45.769278][ T70] head: 0080000000000003 ffffea0000155c01 00000000ffffffff 00000000ffffffff
[ 45.769707][ T70] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 45.770184][ T70] page dumped because: kasan: bad access detected
[ 45.770441][ T70]
[ 45.770528][ T70] Memory state around the buggy address:
[ 45.770751][ T70] ffff888005571580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 45.771160][ T70] ffff888005571600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 45.771453][ T70] >ffff888005571680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 45.771827][ T70] ^
[ 45.772048][ T70] ffff888005571700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 45.772305][ T70] ffff888005571780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 45.772659][ T70] ==================================================================
[ 45.773080][ T70] Disabling lock debugging due to kernel taint
[ 45.773774][ T70] ------------[ cut here ]------------
[ 45.773931][ T70] refcount_t: underflow; use-after-free.
[ 45.774110][ T70] WARNING: CPU: 0 PID: 70 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 45.774439][ T70] Modules linked in: nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib ip6t_rpfilter ipt_rpfilter xt_tcpudp nft_compat nf_tables x_tables dummy veth
[ 45.774887][ T70] CPU: 0 UID: 0 PID: 70 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 45.775396][ T70] Tainted: [B]=BAD_PAGE
[ 45.775568][ T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 45.775814][ T70] Workqueue: netns cleanup_net
[ 45.776043][ T70] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 45.776343][ T70] Code: 83 90 02 80 fb 01 0f 87 95 6b d6 fe 83 e3 01 0f 85 51 ff ff ff c6 05 b1 83 90 02 01 90 48 c7 c7 a0 de c5 b3 e8 c2 8b 15 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 f0 34 a1 ff e9 ba fe ff ff
[ 45.777032][ T70] RSP: 0018:ffffc900004b7a08 EFLAGS: 00010282
[ 45.777466][ T70] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 45.777769][ T70] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 45.778134][ T70] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff68be220
[ 45.778476][ T70] R10: 0000000000000003 R11: ffffc900004b7580 R12: 0000000000000001
[ 45.778777][ T70] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 45.779030][ T70] FS: 0000000000000000(0000) GS:ffff8880807ec000(0000) knlGS:0000000000000000
[ 45.779412][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 45.779614][ T70] CR2: 00007ffecb370b50 CR3: 000000001e335004 CR4: 0000000000772ef0
[ 45.779905][ T70] PKRU: 55555554
[ 45.780039][ T70] Call Trace:
[ 45.780163][ T70]
[ 45.780362][ T70] netdev_run_todo+0x5f0/0xc60
[ 45.780575][ T70] ? dev_ingress_queue_create+0x190/0x190
[ 45.780783][ T70] ? generic_xdp_install+0x410/0x410
[ 45.780990][ T70] ops_undo_list+0x714/0x890
[ 45.781194][ T70] ? netns_get+0x110/0x110
[ 45.781477][ T70] ? cleanup_net+0x2d6/0x830
[ 45.781678][ T70] cleanup_net+0x3b2/0x830
[ 45.781835][ T70] ? net_passive_dec+0x190/0x190
[ 45.782068][ T70] ? rcu_is_watching+0x12/0xb0
[ 45.782332][ T70] process_one_work+0xe35/0x1650
[ 45.782518][ T70] ? pwq_dec_nr_in_flight+0x550/0x550
[ 45.782688][ T70] ? assign_work+0x168/0x240
[ 45.782878][ T70] worker_thread+0x591/0xcf0
[ 45.783130][ T70] ? rescuer_thread+0xd10/0xd10
[ 45.783398][ T70] kthread+0x37b/0x5f0
[ 45.783524][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 45.783680][ T70] ? ret_from_fork+0x1b/0x270
[ 45.783874][ T70] ? __lock_release+0x5d/0x170
[ 45.784052][ T70] ? rcu_is_watching+0x12/0xb0
[ 45.784221][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 45.784449][ T70] ret_from_fork+0x1db/0x270
[ 45.784619][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 45.784777][ T70] ret_from_fork_asm+0x11/0x20
[ 45.784945][ T70]
[ 45.785072][ T70] irq event stamp: 6085
[ 45.785194][ T70] hardirqs last enabled at (6085): [] finish_task_switch.isra.0+0x245/0x960
[ 45.785582][ T70] hardirqs last disabled at (6084): [] __schedule+0x94a/0x1b10
[ 45.785891][ T70] softirqs last enabled at (5440): [] handle_softirqs+0x352/0x610
[ 45.786186][ T70] softirqs last disabled at (5431): [] irq_exit_rcu+0xab/0x100
[ 45.786525][ T70] ---[ end trace 0000000000000000 ]---