[ 24.888215][ T273] nft (273) used greatest stack depth: 24160 bytes left
[ 171.658289][ T70] ==================================================================
[ 171.658607][ T70] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 171.658900][ T70] Read of size 1 at addr ffff888007e396ac by task kworker/u16:1/70
[ 171.659197][ T70]
[ 171.659298][ T70] CPU: 0 UID: 0 PID: 70 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 171.659304][ T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 171.659307][ T70] Workqueue: netns cleanup_net
[ 171.659313][ T70] Call Trace:
[ 171.659317][ T70]
[ 171.659320][ T70] dump_stack_lvl+0x82/0xc0
[ 171.659328][ T70] print_address_description.constprop.0+0x2c/0x3a0
[ 171.659336][ T70] ? kobject_put+0xbb/0xd0
[ 171.659341][ T70] print_report+0xb4/0x270
[ 171.659344][ T70] ? kobject_put+0xbb/0xd0
[ 171.659347][ T70] ? kasan_addr_to_slab+0x21/0x70
[ 171.659351][ T70] ? kobject_put+0xbb/0xd0
[ 171.659354][ T70] kasan_report+0xca/0x100
[ 171.659359][ T70] ? kobject_put+0xbb/0xd0
[ 171.659364][ T70] kobject_put+0xbb/0xd0
[ 171.659368][ T70] netdev_run_todo+0x5f0/0xc60
[ 171.659373][ T70] ? dev_ingress_queue_create+0x190/0x190
[ 171.659377][ T70] ? generic_xdp_install+0x410/0x410
[ 171.659384][ T70] ops_undo_list+0x714/0x890
[ 171.659394][ T70] ? netns_get+0x110/0x110
[ 171.659399][ T70] ? cleanup_net+0x2d6/0x830
[ 171.659408][ T70] cleanup_net+0x3b2/0x830
[ 171.659413][ T70] ? net_passive_dec+0x190/0x190
[ 171.659420][ T70] ? rcu_is_watching+0x12/0xb0
[ 171.659436][ T70] process_one_work+0xe35/0x1650
[ 171.659448][ T70] ? pwq_dec_nr_in_flight+0x550/0x550
[ 171.659456][ T70] ? assign_work+0x168/0x240
[ 171.659460][ T70] worker_thread+0x591/0xcf0
[ 171.659466][ T70] ? rescuer_thread+0xd10/0xd10
[ 171.659469][ T70] kthread+0x37b/0x5f0
[ 171.659474][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 171.659477][ T70] ? ret_from_fork+0x1b/0x270
[ 171.659486][ T70] ? __lock_release+0x5d/0x170
[ 171.659491][ T70] ? rcu_is_watching+0x12/0xb0
[ 171.659494][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 171.659498][ T70] ret_from_fork+0x1db/0x270
[ 171.659501][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 171.659504][ T70] ret_from_fork_asm+0x11/0x20
[ 171.659517][ T70]
[ 171.659518][ T70]
[ 171.667019][ T70] Allocated by task 252:
[ 171.667190][ T70] kasan_save_stack+0x24/0x40
[ 171.667384][ T70] kasan_save_track+0x14/0x30
[ 171.667671][ T70] __kasan_kmalloc+0x7b/0x90
[ 171.667844][ T70] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 171.668033][ T70] alloc_netdev_mqs+0x7d/0x1370
[ 171.668207][ T70] sit_init_net+0x169/0x550
[ 171.668485][ T70] ops_init+0x189/0x550
[ 171.668607][ T70] setup_net+0xf1/0x380
[ 171.668724][ T70] copy_net_ns+0x21a/0x380
[ 171.668900][ T70] create_new_namespaces+0x35f/0x900
[ 171.669166][ T70] unshare_nsproxy_namespaces+0x89/0x120
[ 171.669357][ T70] ksys_unshare+0x2a3/0x660
[ 171.669520][ T70] __x64_sys_unshare+0x31/0x40
[ 171.669684][ T70] do_syscall_64+0xc1/0xfd0
[ 171.669951][ T70] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 171.670176][ T70]
[ 171.670258][ T70] Freed by task 70:
[ 171.670403][ T70] kasan_save_stack+0x24/0x40
[ 171.670566][ T70] kasan_save_track+0x14/0x30
[ 171.670827][ T70] __kasan_save_free_info+0x3b/0x60
[ 171.670984][ T70] __kasan_slab_free+0x3f/0x60
[ 171.671157][ T70] kfree+0x21d/0x540
[ 171.671313][ T70] device_release+0x9c/0x210
[ 171.671584][ T70] kobject_cleanup+0xfe/0x360
[ 171.671745][ T70] netdev_run_todo+0x81f/0xc60
[ 171.671965][ T70] ops_undo_list+0x714/0x890
[ 171.672142][ T70] cleanup_net+0x3b2/0x830
[ 171.672442][ T70] process_one_work+0xe35/0x1650
[ 171.672630][ T70] worker_thread+0x591/0xcf0
[ 171.672802][ T70] kthread+0x37b/0x5f0
[ 171.672922][ T70] ret_from_fork+0x1db/0x270
[ 171.673178][ T70] ret_from_fork_asm+0x11/0x20
[ 171.673339][ T70]
[ 171.673438][ T70] The buggy address belongs to the object at ffff888007e39000
[ 171.673438][ T70] which belongs to the cache kmalloc-4k of size 4096
[ 171.673919][ T70] The buggy address is located 1708 bytes inside of
[ 171.673919][ T70] freed 4096-byte region [ffff888007e39000, ffff888007e3a000)
[ 171.674315][ T70]
[ 171.674398][ T70] The buggy address belongs to the physical page:
[ 171.674687][ T70] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e38
[ 171.675002][ T70] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 171.675248][ T70] flags: 0x80000000000040(head|node=0|zone=1)
[ 171.675559][ T70] page_type: f5(slab)
[ 171.675684][ T70] raw: 0080000000000040 ffff888001043700 ffffea00002d4610 ffffea0000236010
[ 171.675983][ T70] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 171.676381][ T70] head: 0080000000000040 ffff888001043700 ffffea00002d4610 ffffea0000236010
[ 171.676686][ T70] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 171.677075][ T70] head: 0080000000000003 ffffea00001f8e01 00000000ffffffff 00000000ffffffff
[ 171.677356][ T70] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 171.677747][ T70] page dumped because: kasan: bad access detected
[ 171.677969][ T70]
[ 171.678059][ T70] Memory state around the buggy address:
[ 171.678217][ T70] ffff888007e39580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 171.678537][ T70] ffff888007e39600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 171.678813][ T70] >ffff888007e39680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 171.679054][ T70] ^
[ 171.679290][ T70] ffff888007e39700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 171.679518][ T70] ffff888007e39780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 171.679758][ T70] ==================================================================
[ 171.680188][ T70] Disabling lock debugging due to kernel taint
[ 171.681292][ T70] ------------[ cut here ]------------
[ 171.681569][ T70] refcount_t: underflow; use-after-free.
[ 171.681857][ T70] WARNING: CPU: 1 PID: 70 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 171.682381][ T70] Modules linked in: nf_conntrack_netlink nft_ct nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_numgen nf_tables
[ 171.682974][ T70] CPU: 1 UID: 0 PID: 70 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 171.683518][ T70] Tainted: [B]=BAD_PAGE
[ 171.683708][ T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 171.684021][ T70] Workqueue: netns cleanup_net
[ 171.684315][ T70] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 171.684772][ 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 85 a5 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
[ 171.685803][ T70] RSP: 0018:ffffc900004b7a08 EFLAGS: 00010282
[ 171.686111][ T70] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 171.686599][ T70] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 171.686947][ T70] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff4c3e220
[ 171.687305][ T70] R10: 0000000000000003 R11: ffffc900004b7580 R12: 0000000000000001
[ 171.687656][ T70] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 171.687946][ T70] FS: 0000000000000000(0000) GS:ffff88808ec6c000(0000) knlGS:0000000000000000
[ 171.688239][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 171.688446][ T70] CR2: 00007f18a3ef7000 CR3: 0000000021d35005 CR4: 0000000000772ef0
[ 171.688750][ T70] PKRU: 55555554
[ 171.688881][ T70] Call Trace:
[ 171.689003][ T70]
[ 171.689124][ T70] netdev_run_todo+0x5f0/0xc60
[ 171.689300][ T70] ? dev_ingress_queue_create+0x190/0x190
[ 171.689475][ T70] ? generic_xdp_install+0x410/0x410
[ 171.689650][ T70] ops_undo_list+0x714/0x890
[ 171.689813][ T70] ? netns_get+0x110/0x110
[ 171.689970][ T70] ? cleanup_net+0x2d6/0x830
[ 171.690143][ T70] cleanup_net+0x3b2/0x830
[ 171.690305][ T70] ? net_passive_dec+0x190/0x190
[ 171.690479][ T70] ? rcu_is_watching+0x12/0xb0
[ 171.690658][ T70] process_one_work+0xe35/0x1650
[ 171.690825][ T70] ? pwq_dec_nr_in_flight+0x550/0x550
[ 171.690983][ T70] ? assign_work+0x168/0x240
[ 171.691182][ T70] worker_thread+0x591/0xcf0
[ 171.691360][ T70] ? rescuer_thread+0xd10/0xd10
[ 171.691531][ T70] kthread+0x37b/0x5f0
[ 171.691655][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 171.691828][ T70] ? ret_from_fork+0x1b/0x270
[ 171.691990][ T70] ? __lock_release+0x5d/0x170
[ 171.692169][ T70] ? rcu_is_watching+0x12/0xb0
[ 171.692331][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 171.692509][ T70] ret_from_fork+0x1db/0x270
[ 171.692670][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 171.692830][ T70] ret_from_fork_asm+0x11/0x20
[ 171.692992][ T70]
[ 171.693130][ T70] irq event stamp: 2629
[ 171.693261][ T70] hardirqs last enabled at (2629): [] finish_task_switch.isra.0+0x245/0x960
[ 171.693591][ T70] hardirqs last disabled at (2628): [] __schedule+0x94a/0x1b10
[ 171.693878][ T70] softirqs last enabled at (1828): [] handle_softirqs+0x352/0x610
[ 171.694162][ T70] softirqs last disabled at (1819): [] irq_exit_rcu+0xab/0x100
[ 171.694461][ T70] ---[ end trace 0000000000000000 ]---