[ 14.771415][ T69] ==================================================================
[ 14.771802][ T69] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 14.772085][ T69] Read of size 1 at addr ffff888007d3c694 by task kworker/u16:1/69
[ 14.772344][ T69]
[ 14.772443][ T69] CPU: 2 UID: 0 PID: 69 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 14.772448][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 14.772451][ T69] Workqueue: netns cleanup_net
[ 14.772458][ T69] Call Trace:
[ 14.772461][ T69]
[ 14.772464][ T69] dump_stack_lvl+0x82/0xc0
[ 14.772469][ T69] print_address_description.constprop.0+0x2c/0x3a0
[ 14.772479][ T69] ? kobject_put+0xbb/0xd0
[ 14.772482][ T69] print_report+0xb4/0x270
[ 14.772486][ T69] ? kobject_put+0xbb/0xd0
[ 14.772489][ T69] ? kasan_addr_to_slab+0x21/0x70
[ 14.772493][ T69] ? kobject_put+0xbb/0xd0
[ 14.772496][ T69] kasan_report+0xca/0x100
[ 14.772500][ T69] ? kobject_put+0xbb/0xd0
[ 14.772505][ T69] kobject_put+0xbb/0xd0
[ 14.772508][ T69] netdev_run_todo+0x5f0/0xc60
[ 14.772515][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 14.772519][ T69] ? generic_xdp_install+0x410/0x410
[ 14.772525][ T69] ops_undo_list+0x714/0x890
[ 14.772530][ T69] ? netns_get+0x110/0x110
[ 14.772532][ T69] ? cleanup_net+0x2d6/0x830
[ 14.772537][ T69] cleanup_net+0x3b2/0x830
[ 14.772540][ T69] ? net_passive_dec+0x190/0x190
[ 14.772544][ T69] ? rcu_is_watching+0x12/0xb0
[ 14.772550][ T69] process_one_work+0xe35/0x1650
[ 14.772558][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 14.772563][ T69] ? assign_work+0x168/0x240
[ 14.772568][ T69] worker_thread+0x591/0xcf0
[ 14.772573][ T69] ? rescuer_thread+0xd10/0xd10
[ 14.772576][ T69] kthread+0x37b/0x5f0
[ 14.772580][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.772582][ T69] ? ret_from_fork+0x1b/0x270
[ 14.772589][ T69] ? __lock_release+0x5d/0x170
[ 14.772595][ T69] ? rcu_is_watching+0x12/0xb0
[ 14.772597][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.772600][ T69] ret_from_fork+0x1db/0x270
[ 14.772603][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.772606][ T69] ret_from_fork_asm+0x11/0x20
[ 14.772615][ T69]
[ 14.772616][ T69]
[ 14.779433][ T69] Allocated by task 228:
[ 14.779579][ T69] kasan_save_stack+0x24/0x40
[ 14.779783][ T69] kasan_save_track+0x14/0x30
[ 14.779967][ T69] __kasan_kmalloc+0x7b/0x90
[ 14.780151][ T69] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 14.780338][ T69] alloc_netdev_mqs+0x7d/0x1310
[ 14.780538][ T69] sit_init_net+0x169/0x550
[ 14.780742][ T69] ops_init+0x189/0x550
[ 14.780875][ T69] setup_net+0xf1/0x380
[ 14.781033][ T69] copy_net_ns+0x21a/0x380
[ 14.781207][ T69] create_new_namespaces+0x35f/0x900
[ 14.781381][ T69] unshare_nsproxy_namespaces+0x89/0x120
[ 14.781571][ T69] ksys_unshare+0x2a3/0x660
[ 14.781760][ T69] __x64_sys_unshare+0x31/0x40
[ 14.781941][ T69] do_syscall_64+0xc1/0xfd0
[ 14.782120][ T69] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 14.782362][ T69]
[ 14.782453][ T69] Freed by task 69:
[ 14.782598][ T69] kasan_save_stack+0x24/0x40
[ 14.782792][ T69] kasan_save_track+0x14/0x30
[ 14.782989][ T69] __kasan_save_free_info+0x3b/0x60
[ 14.783162][ T69] __kasan_slab_free+0x3f/0x60
[ 14.783345][ T69] kfree+0x21d/0x540
[ 14.783490][ T69] device_release+0x9c/0x210
[ 14.783685][ T69] kobject_cleanup+0xfe/0x360
[ 14.783854][ T69] netdev_run_todo+0x81f/0xc60
[ 14.784039][ T69] ops_undo_list+0x714/0x890
[ 14.784211][ T69] cleanup_net+0x3b2/0x830
[ 14.784387][ T69] process_one_work+0xe35/0x1650
[ 14.784574][ T69] worker_thread+0x591/0xcf0
[ 14.784760][ T69] kthread+0x37b/0x5f0
[ 14.784892][ T69] ret_from_fork+0x1db/0x270
[ 14.785087][ T69] ret_from_fork_asm+0x11/0x20
[ 14.785261][ T69]
[ 14.785355][ T69] The buggy address belongs to the object at ffff888007d3c000
[ 14.785355][ T69] which belongs to the cache kmalloc-4k of size 4096
[ 14.785791][ T69] The buggy address is located 1684 bytes inside of
[ 14.785791][ T69] freed 4096-byte region [ffff888007d3c000, ffff888007d3d000)
[ 14.786237][ T69]
[ 14.786326][ T69] The buggy address belongs to the physical page:
[ 14.786539][ T69] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7d38
[ 14.786862][ T69] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 14.787142][ T69] flags: 0x80000000000040(head|node=0|zone=1)
[ 14.787367][ T69] page_type: f5(slab)
[ 14.787506][ T69] raw: 0080000000000040 ffff888001043700 ffffea00001d8610 ffffea0000167610
[ 14.787834][ T69] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 14.788152][ T69] head: 0080000000000040 ffff888001043700 ffffea00001d8610 ffffea0000167610
[ 14.788495][ T69] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 14.788815][ T69] head: 0080000000000003 ffffea00001f4e01 00000000ffffffff 00000000ffffffff
[ 14.789146][ T69] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 14.789459][ T69] page dumped because: kasan: bad access detected
[ 14.789680][ T69]
[ 14.789768][ T69] Memory state around the buggy address:
[ 14.789964][ T69] ffff888007d3c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.790233][ T69] ffff888007d3c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.790482][ T69] >ffff888007d3c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.790755][ T69] ^
[ 14.790933][ T69] ffff888007d3c700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.791191][ T69] ffff888007d3c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.791435][ T69] ==================================================================
[ 14.791958][ T69] Disabling lock debugging due to kernel taint
[ 14.792573][ T69] ------------[ cut here ]------------
[ 14.792797][ T69] refcount_t: underflow; use-after-free.
[ 14.793030][ T69] WARNING: CPU: 2 PID: 69 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 14.793382][ T69] Modules linked in: veth
[ 14.793548][ T69] CPU: 2 UID: 0 PID: 69 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 14.794002][ T69] Tainted: [B]=BAD_PAGE
[ 14.794153][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 14.794412][ T69] Workqueue: netns cleanup_net
[ 14.794634][ T69] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 14.794900][ T69] 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 65 b5 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
[ 14.795579][ T69] RSP: 0018:ffffc900004a7a08 EFLAGS: 00010282
[ 14.795830][ T69] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 14.796117][ T69] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 14.796413][ T69] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff6bfe134
[ 14.796687][ T69] R10: 0000000000000003 R11: ffffc900004a7580 R12: 0000000000000001
[ 14.796991][ T69] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 14.797280][ T69] FS: 0000000000000000(0000) GS:ffff88807ef10000(0000) knlGS:0000000000000000
[ 14.797596][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 14.797834][ T69] CR2: 000056278019f0b8 CR3: 0000000009693001 CR4: 0000000000772ef0
[ 14.798123][ T69] PKRU: 55555554
[ 14.798287][ T69] Call Trace:
[ 14.798457][ T69]
[ 14.798569][ T69] netdev_run_todo+0x5f0/0xc60
[ 14.798773][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 14.798976][ T69] ? generic_xdp_install+0x410/0x410
[ 14.799172][ T69] ops_undo_list+0x714/0x890
[ 14.799375][ T69] ? netns_get+0x110/0x110
[ 14.799568][ T69] ? cleanup_net+0x2d6/0x830
[ 14.799779][ T69] cleanup_net+0x3b2/0x830
[ 14.799983][ T69] ? net_passive_dec+0x190/0x190
[ 14.800176][ T69] ? rcu_is_watching+0x12/0xb0
[ 14.800395][ T69] process_one_work+0xe35/0x1650
[ 14.800607][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 14.800891][ T69] ? assign_work+0x168/0x240
[ 14.801091][ T69] worker_thread+0x591/0xcf0
[ 14.801311][ T69] ? rescuer_thread+0xd10/0xd10
[ 14.801498][ T69] kthread+0x37b/0x5f0
[ 14.801736][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.802036][ T69] ? ret_from_fork+0x1b/0x270
[ 14.802253][ T69] ? __lock_release+0x5d/0x170
[ 14.802448][ T69] ? rcu_is_watching+0x12/0xb0
[ 14.802821][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.803028][ T69] ret_from_fork+0x1db/0x270
[ 14.803316][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.803592][ T69] ret_from_fork_asm+0x11/0x20
[ 14.803853][ T69]
[ 14.804073][ T69] irq event stamp: 2597
[ 14.804291][ T69] hardirqs last enabled at (2597): [] finish_task_switch.isra.0+0x245/0x960
[ 14.804703][ T69] hardirqs last disabled at (2596): [] __schedule+0x94a/0x1b10
[ 14.805088][ T69] softirqs last enabled at (2510): [] handle_softirqs+0x352/0x610
[ 14.805479][ T69] softirqs last disabled at (2493): [] irq_exit_rcu+0xab/0x100
[ 14.805851][ T69] ---[ end trace 0000000000000000 ]---