[ 18.679007][ T264] ip (264) used greatest stack depth: 24448 bytes left
[ 51.863308][ T757] pm_nl_ctl (757) used greatest stack depth: 23616 bytes left
[ 90.837710][ T70] ==================================================================
[ 90.838039][ T70] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 90.838320][ T70] Read of size 1 at addr ffff88800853169c by task kworker/u16:1/70
[ 90.838598][ T70]
[ 90.838696][ T70] CPU: 0 UID: 0 PID: 70 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 90.838701][ T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 90.838705][ T70] Workqueue: netns cleanup_net
[ 90.838714][ T70] Call Trace:
[ 90.838719][ T70]
[ 90.838722][ T70] dump_stack_lvl+0x82/0xc0
[ 90.838730][ T70] print_address_description.constprop.0+0x2c/0x3a0
[ 90.838739][ T70] ? kobject_put+0xbb/0xd0
[ 90.838742][ T70] print_report+0xb4/0x270
[ 90.838746][ T70] ? kobject_put+0xbb/0xd0
[ 90.838749][ T70] ? kasan_addr_to_slab+0x21/0x70
[ 90.838753][ T70] ? kobject_put+0xbb/0xd0
[ 90.838755][ T70] kasan_report+0xca/0x100
[ 90.838759][ T70] ? kobject_put+0xbb/0xd0
[ 90.838765][ T70] kobject_put+0xbb/0xd0
[ 90.838768][ T70] netdev_run_todo+0x5f0/0xc60
[ 90.838775][ T70] ? dev_ingress_queue_create+0x190/0x190
[ 90.838778][ T70] ? generic_xdp_install+0x410/0x410
[ 90.838784][ T70] ops_undo_list+0x714/0x890
[ 90.838789][ T70] ? netns_get+0x110/0x110
[ 90.838792][ T70] ? cleanup_net+0x2d6/0x830
[ 90.838798][ T70] cleanup_net+0x3b2/0x830
[ 90.838802][ T70] ? net_passive_dec+0x190/0x190
[ 90.838806][ T70] ? rcu_is_watching+0x12/0xb0
[ 90.838815][ T70] process_one_work+0xe35/0x1650
[ 90.838826][ T70] ? pwq_dec_nr_in_flight+0x550/0x550
[ 90.838832][ T70] ? assign_work+0x168/0x240
[ 90.838837][ T70] worker_thread+0x591/0xcf0
[ 90.838843][ T70] ? rescuer_thread+0xd10/0xd10
[ 90.838847][ T70] kthread+0x37b/0x5f0
[ 90.838852][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 90.838855][ T70] ? ret_from_fork+0x1b/0x270
[ 90.838861][ T70] ? __lock_release+0x5d/0x170
[ 90.838866][ T70] ? rcu_is_watching+0x12/0xb0
[ 90.838870][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 90.838874][ T70] ret_from_fork+0x1db/0x270
[ 90.838877][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 90.838880][ T70] ret_from_fork_asm+0x11/0x20
[ 90.838891][ T70]
[ 90.838892][ T70]
[ 90.845522][ T70] Allocated by task 240:
[ 90.845659][ T70] kasan_save_stack+0x24/0x40
[ 90.845840][ T70] kasan_save_track+0x14/0x30
[ 90.846021][ T70] __kasan_kmalloc+0x7b/0x90
[ 90.846197][ T70] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 90.846382][ T70] alloc_netdev_mqs+0x7d/0x1370
[ 90.846560][ T70] sit_init_net+0x169/0x550
[ 90.846737][ T70] ops_init+0x189/0x550
[ 90.846873][ T70] setup_net+0xf1/0x380
[ 90.847011][ T70] copy_net_ns+0x21a/0x380
[ 90.847187][ T70] create_new_namespaces+0x35f/0x900
[ 90.847370][ T70] unshare_nsproxy_namespaces+0x89/0x120
[ 90.847543][ T70] ksys_unshare+0x2a3/0x660
[ 90.847725][ T70] __x64_sys_unshare+0x31/0x40
[ 90.847904][ T70] do_syscall_64+0xc1/0xfd0
[ 90.848076][ T70] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 90.848285][ T70]
[ 90.848382][ T70] Freed by task 70:
[ 90.848513][ T70] kasan_save_stack+0x24/0x40
[ 90.848692][ T70] kasan_save_track+0x14/0x30
[ 90.848859][ T70] __kasan_save_free_info+0x3b/0x60
[ 90.849035][ T70] __kasan_slab_free+0x3f/0x60
[ 90.849207][ T70] kfree+0x21d/0x540
[ 90.849343][ T70] device_release+0x9c/0x210
[ 90.849514][ T70] kobject_cleanup+0xfe/0x360
[ 90.849684][ T70] netdev_run_todo+0x81f/0xc60
[ 90.849856][ T70] ops_undo_list+0x714/0x890
[ 90.850025][ T70] cleanup_net+0x3b2/0x830
[ 90.850196][ T70] process_one_work+0xe35/0x1650
[ 90.850372][ T70] worker_thread+0x591/0xcf0
[ 90.850639][ T70] kthread+0x37b/0x5f0
[ 90.850767][ T70] ret_from_fork+0x1db/0x270
[ 90.850944][ T70] ret_from_fork_asm+0x11/0x20
[ 90.851121][ T70]
[ 90.851300][ T70] The buggy address belongs to the object at ffff888008531000
[ 90.851300][ T70] which belongs to the cache kmalloc-4k of size 4096
[ 90.851728][ T70] The buggy address is located 1692 bytes inside of
[ 90.851728][ T70] freed 4096-byte region [ffff888008531000, ffff888008532000)
[ 90.852231][ T70]
[ 90.852328][ T70] The buggy address belongs to the physical page:
[ 90.852540][ T70] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8530
[ 90.852959][ T70] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 90.853220][ T70] flags: 0x80000000000040(head|node=0|zone=1)
[ 90.853450][ T70] page_type: f5(slab)
[ 90.853698][ T70] raw: 0080000000000040 ffff888001043700 ffffea000020ba10 ffffea000027a810
[ 90.854033][ T70] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 90.854345][ T70] head: 0080000000000040 ffff888001043700 ffffea000020ba10 ffffea000027a810
[ 90.854650][ T70] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 90.854959][ T70] head: 0080000000000003 ffffea0000214c01 00000000ffffffff 00000000ffffffff
[ 90.855260][ T70] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 90.855561][ T70] page dumped because: kasan: bad access detected
[ 90.855794][ T70]
[ 90.855880][ T70] Memory state around the buggy address:
[ 90.856052][ T70] ffff888008531580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 90.856309][ T70] ffff888008531600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 90.856555][ T70] >ffff888008531680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 90.856828][ T70] ^
[ 90.856995][ T70] ffff888008531700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 90.857240][ T70] ffff888008531780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 90.857491][ T70] ==================================================================
[ 90.857778][ T70] Disabling lock debugging due to kernel taint
[ 90.858024][ T70] ------------[ cut here ]------------
[ 90.858187][ T70] refcount_t: underflow; use-after-free.
[ 90.858410][ T70] WARNING: CPU: 0 PID: 70 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 90.858743][ T70] Modules linked in:
[ 90.858902][ T70] CPU: 0 UID: 0 PID: 70 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 90.859409][ T70] Tainted: [B]=BAD_PAGE
[ 90.859557][ T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 90.860390][ T70] Workqueue: netns cleanup_net
[ 90.860596][ T70] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 90.860930][ T70] Code: 32 b8 02 80 fb 01 0f 87 cb 8b d9 fe 83 e3 01 0f 85 51 ff ff ff c6 05 e5 32 b8 02 01 90 48 c7 c7 60 8d 05 b9 e8 42 c1 18 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 b0 63 a1 ff e9 ba fe ff ff
[ 90.861568][ T70] RSP: 0018:ffffc900004b7a08 EFLAGS: 00010282
[ 90.861793][ T70] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 90.862052][ T70] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 90.862308][ T70] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff7342934
[ 90.862565][ T70] R10: 0000000000000003 R11: ffffc900004b7580 R12: 0000000000000001
[ 90.862819][ T70] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 90.863081][ T70] FS: 0000000000000000(0000) GS:ffff88807b384000(0000) knlGS:0000000000000000
[ 90.863379][ T70] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 90.863609][ T70] CR2: 00007fff6ba65f08 CR3: 0000000023559004 CR4: 0000000000772ef0
[ 90.863867][ T70] PKRU: 55555554
[ 90.863994][ T70] Call Trace:
[ 90.864135][ T70]
[ 90.864228][ T70] netdev_run_todo+0x5f0/0xc60
[ 90.864408][ T70] ? dev_ingress_queue_create+0x190/0x190
[ 90.864579][ T70] ? generic_xdp_install+0x410/0x410
[ 90.864758][ T70] ops_undo_list+0x714/0x890
[ 90.864925][ T70] ? netns_get+0x110/0x110
[ 90.865102][ T70] ? cleanup_net+0x2d6/0x830
[ 90.865270][ T70] cleanup_net+0x3b2/0x830
[ 90.865442][ T70] ? net_passive_dec+0x190/0x190
[ 90.865615][ T70] ? rcu_is_watching+0x12/0xb0
[ 90.865796][ T70] process_one_work+0xe35/0x1650
[ 90.865969][ T70] ? pwq_dec_nr_in_flight+0x550/0x550
[ 90.866155][ T70] ? assign_work+0x168/0x240
[ 90.866431][ T70] worker_thread+0x591/0xcf0
[ 90.866623][ T70] ? rescuer_thread+0xd10/0xd10
[ 90.866804][ T70] kthread+0x37b/0x5f0
[ 90.866943][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 90.867225][ T70] ? ret_from_fork+0x1b/0x270
[ 90.867409][ T70] ? __lock_release+0x5d/0x170
[ 90.867586][ T70] ? rcu_is_watching+0x12/0xb0
[ 90.867782][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 90.868056][ T70] ret_from_fork+0x1db/0x270
[ 90.868243][ T70] ? kthread_is_per_cpu+0xc0/0xc0
[ 90.868427][ T70] ret_from_fork_asm+0x11/0x20
[ 90.868614][ T70]
[ 90.868849][ T70] irq event stamp: 4911
[ 90.868990][ T70] hardirqs last enabled at (4911): [] __schedule+0x13c7/0x1b10
[ 90.869332][ T70] hardirqs last disabled at (4910): [] __schedule+0x94a/0x1b10
[ 90.869747][ T70] softirqs last enabled at (4844): [] handle_softirqs+0x352/0x610
[ 90.870063][ T70] softirqs last disabled at (4837): [] irq_exit_rcu+0xab/0x100
[ 90.870393][ T70] ---[ end trace 0000000000000000 ]---