[ 14.722545][ T258] ip (258) used greatest stack depth: 24112 bytes left
[ 16.176040][ T270] u32 classifier
[ 16.176427][ T270] input device check on
[ 16.176693][ T270] Actions configured
[ 16.290515][ T271] Mirror/redirect action on
[ 16.312208][ T269] tc (269) used greatest stack depth: 23888 bytes left
[ 83.214778][ T69] ==================================================================
[ 83.215080][ T69] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 83.215341][ T69] Read of size 1 at addr ffff8880074096c4 by task kworker/u16:1/69
[ 83.215568][ T69]
[ 83.215657][ T69] CPU: 3 UID: 0 PID: 69 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 83.215662][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 83.215665][ T69] Workqueue: netns cleanup_net
[ 83.215680][ T69] Call Trace:
[ 83.215683][ T69]
[ 83.215685][ T69] dump_stack_lvl+0x82/0xc0
[ 83.215690][ T69] print_address_description.constprop.0+0x2c/0x3a0
[ 83.215701][ T69] ? kobject_put+0xbb/0xd0
[ 83.215705][ T69] print_report+0xb4/0x270
[ 83.215708][ T69] ? kobject_put+0xbb/0xd0
[ 83.215711][ T69] ? kasan_addr_to_slab+0x21/0x70
[ 83.215715][ T69] ? kobject_put+0xbb/0xd0
[ 83.215719][ T69] kasan_report+0xca/0x100
[ 83.215723][ T69] ? kobject_put+0xbb/0xd0
[ 83.215728][ T69] kobject_put+0xbb/0xd0
[ 83.215732][ T69] netdev_run_todo+0x5f0/0xc60
[ 83.215739][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 83.215743][ T69] ? generic_xdp_install+0x410/0x410
[ 83.215746][ T69] ? net_generic+0xb1/0x1f0
[ 83.215757][ T69] ops_undo_list+0x714/0x890
[ 83.215762][ T69] ? rtnl_net_dumpid_one+0x270/0x270
[ 83.215765][ T69] ? cleanup_net+0x2d6/0x8b0
[ 83.215771][ T69] cleanup_net+0x3b2/0x8b0
[ 83.215776][ T69] ? net_passive_dec+0x190/0x190
[ 83.215780][ T69] ? rcu_is_watching+0x12/0xb0
[ 83.215794][ T69] process_one_work+0xe35/0x1650
[ 83.215808][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 83.215813][ T69] ? assign_work+0x168/0x240
[ 83.215817][ T69] worker_thread+0x591/0xcf0
[ 83.215824][ T69] ? rescuer_thread+0xd10/0xd10
[ 83.215828][ T69] kthread+0x37b/0x5f0
[ 83.215832][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 83.215835][ T69] ? ret_from_fork+0x1b/0x270
[ 83.215844][ T69] ? __lock_release+0x5d/0x170
[ 83.215849][ T69] ? rcu_is_watching+0x12/0xb0
[ 83.215853][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 83.215856][ T69] ret_from_fork+0x1db/0x270
[ 83.215859][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 83.215862][ T69] ret_from_fork_asm+0x11/0x20
[ 83.215871][ T69]
[ 83.215873][ T69]
[ 83.222347][ T69] Allocated by task 257:
[ 83.222468][ T69] kasan_save_stack+0x24/0x40
[ 83.222727][ T69] kasan_save_track+0x14/0x30
[ 83.222878][ T69] __kasan_kmalloc+0x7b/0x90
[ 83.223029][ T69] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 83.223186][ T69] alloc_netdev_mqs+0x7d/0x1370
[ 83.223428][ T69] ip6_tnl_init_net+0x102/0x3f0
[ 83.223589][ T69] ops_init+0x189/0x550
[ 83.223704][ T69] setup_net+0xf1/0x380
[ 83.223820][ T69] copy_net_ns+0x253/0x510
[ 83.224060][ T69] create_new_namespaces+0x35f/0x900
[ 83.224214][ T69] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 83.224364][ T69] ksys_unshare+0x2be/0x6e0
[ 83.224523][ T69] __x64_sys_unshare+0x31/0x40
[ 83.224760][ T69] do_syscall_64+0xc1/0xfd0
[ 83.224915][ T69] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 83.225103][ T69]
[ 83.225191][ T69] Freed by task 69:
[ 83.225309][ T69] kasan_save_stack+0x24/0x40
[ 83.225469][ T69] kasan_save_track+0x14/0x30
[ 83.225618][ T69] __kasan_save_free_info+0x3b/0x60
[ 83.225774][ T69] __kasan_slab_free+0x3f/0x60
[ 83.225925][ T69] kfree+0x21d/0x540
[ 83.226131][ T69] device_release+0x9c/0x210
[ 83.226290][ T69] kobject_cleanup+0xfe/0x360
[ 83.226443][ T69] netdev_run_todo+0x81f/0xc60
[ 83.226598][ T69] ops_undo_list+0x714/0x890
[ 83.226839][ T69] cleanup_net+0x3b2/0x8b0
[ 83.226991][ T69] process_one_work+0xe35/0x1650
[ 83.227144][ T69] worker_thread+0x591/0xcf0
[ 83.227295][ T69] kthread+0x37b/0x5f0
[ 83.227410][ T69] ret_from_fork+0x1db/0x270
[ 83.227564][ T69] ret_from_fork_asm+0x11/0x20
[ 83.227716][ T69]
[ 83.227795][ T69] The buggy address belongs to the object at ffff888007409000
[ 83.227795][ T69] which belongs to the cache kmalloc-4k of size 4096
[ 83.228250][ T69] The buggy address is located 1732 bytes inside of
[ 83.228250][ T69] freed 4096-byte region [ffff888007409000, ffff88800740a000)
[ 83.228621][ T69]
[ 83.228786][ T69] The buggy address belongs to the physical page:
[ 83.228977][ T69] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7408
[ 83.229251][ T69] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 83.229494][ T69] flags: 0x80000000000040(head|node=0|zone=1)
[ 83.229705][ T69] page_type: f5(slab)
[ 83.229832][ T69] raw: 0080000000000040 ffff888001043700 ffffea00001cda10 ffffea00001ca410
[ 83.230214][ T69] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 83.230492][ T69] head: 0080000000000040 ffff888001043700 ffffea00001cda10 ffffea00001ca410
[ 83.230767][ T69] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 83.231126][ T69] head: 0080000000000003 ffffea00001d0201 00000000ffffffff 00000000ffffffff
[ 83.231399][ T69] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 83.231756][ T69] page dumped because: kasan: bad access detected
[ 83.231951][ T69]
[ 83.232033][ T69] Memory state around the buggy address:
[ 83.232185][ T69] ffff888007409580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 83.232506][ T69] ffff888007409600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 83.232733][ T69] >ffff888007409680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 83.233040][ T69] ^
[ 83.233231][ T69] ffff888007409700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 83.233454][ T69] ffff888007409780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 83.233755][ T69] ==================================================================
[ 83.234074][ T69] Disabling lock debugging due to kernel taint
[ 83.234289][ T69] ------------[ cut here ]------------
[ 83.234893][ T69] refcount_t: underflow; use-after-free.
[ 83.235108][ T69] WARNING: CPU: 1 PID: 69 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 83.235395][ T69] Modules linked in: act_mirred cls_u32 sch_ingress ifb
[ 83.235661][ T69] CPU: 1 UID: 0 PID: 69 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 83.235999][ T69] Tainted: [B]=BAD_PAGE
[ 83.236121][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 83.236322][ T69] Workqueue: netns cleanup_net
[ 83.236504][ T69] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 83.236704][ 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 e5 9f 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
[ 83.237234][ T69] RSP: 0018:ffffc900004a7a08 EFLAGS: 00010282
[ 83.237453][ T69] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 83.237686][ T69] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 83.237914][ T69] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff41c0934
[ 83.238142][ T69] R10: 0000000000000003 R11: ffffc900004a7580 R12: 0000000000000001
[ 83.238387][ T69] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 83.238612][ T69] FS: 0000000000000000(0000) GS:ffff8880cad88000(0000) knlGS:0000000000000000
[ 83.238878][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 83.239070][ T69] CR2: 000055c8c099ab38 CR3: 000000002a749005 CR4: 0000000000772ef0
[ 83.239306][ T69] PKRU: 55555554
[ 83.239432][ T69] Call Trace:
[ 83.239551][ T69]
[ 83.239632][ T69] netdev_run_todo+0x5f0/0xc60
[ 83.239793][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 83.239952][ T69] ? generic_xdp_install+0x410/0x410
[ 83.240122][ T69] ? net_generic+0xb1/0x1f0
[ 83.240277][ T69] ops_undo_list+0x714/0x890
[ 83.240434][ T69] ? rtnl_net_dumpid_one+0x270/0x270
[ 83.240588][ T69] ? cleanup_net+0x2d6/0x8b0
[ 83.240740][ T69] cleanup_net+0x3b2/0x8b0
[ 83.240889][ T69] ? net_passive_dec+0x190/0x190
[ 83.241038][ T69] ? rcu_is_watching+0x12/0xb0
[ 83.241187][ T69] process_one_work+0xe35/0x1650
[ 83.241338][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 83.241500][ T69] ? assign_work+0x168/0x240
[ 83.241652][ T69] worker_thread+0x591/0xcf0
[ 83.241807][ T69] ? rescuer_thread+0xd10/0xd10
[ 83.241957][ T69] kthread+0x37b/0x5f0
[ 83.242068][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 83.242216][ T69] ? ret_from_fork+0x1b/0x270
[ 83.242362][ T69] ? __lock_release+0x5d/0x170
[ 83.242518][ T69] ? rcu_is_watching+0x12/0xb0
[ 83.242675][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 83.242823][ T69] ret_from_fork+0x1db/0x270
[ 83.242973][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 83.243120][ T69] ret_from_fork_asm+0x11/0x20
[ 83.243273][ T69]
[ 83.243394][ T69] irq event stamp: 9031
[ 83.243515][ T69] hardirqs last enabled at (9031): [] finish_task_switch.isra.0+0x245/0x960
[ 83.243808][ T69] hardirqs last disabled at (9030): [] __schedule+0x94a/0x1b10
[ 83.244089][ T69] softirqs last enabled at (8780): [] handle_softirqs+0x352/0x610
[ 83.244351][ T69] softirqs last disabled at (8771): [] irq_exit_rcu+0xab/0x100
[ 83.244629][ T69] ---[ end trace 0000000000000000 ]---