[ 19.367312][ T69] ==================================================================
[ 19.367749][ T69] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 19.368041][ T69] Read of size 1 at addr ffff888008b8c6c4 by task kworker/u16:1/69
[ 19.368292][ T69]
[ 19.368399][ T69] CPU: 0 UID: 0 PID: 69 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 19.368404][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.368409][ T69] Workqueue: netns cleanup_net
[ 19.368421][ T69] Call Trace:
[ 19.368425][ T69]
[ 19.368428][ T69] dump_stack_lvl+0x82/0xc0
[ 19.368434][ T69] print_address_description.constprop.0+0x2c/0x3a0
[ 19.368447][ T69] ? kobject_put+0xbb/0xd0
[ 19.368451][ T69] print_report+0xb4/0x270
[ 19.368455][ T69] ? kobject_put+0xbb/0xd0
[ 19.368458][ T69] ? kasan_addr_to_slab+0x21/0x70
[ 19.368462][ T69] ? kobject_put+0xbb/0xd0
[ 19.368465][ T69] kasan_report+0xca/0x100
[ 19.368469][ T69] ? kobject_put+0xbb/0xd0
[ 19.368474][ T69] kobject_put+0xbb/0xd0
[ 19.368478][ T69] netdev_run_todo+0x5f0/0xc60
[ 19.368484][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 19.368488][ T69] ? generic_xdp_install+0x410/0x410
[ 19.368491][ T69] ? net_generic+0xb1/0x1f0
[ 19.368502][ T69] ops_undo_list+0x714/0x890
[ 19.368507][ T69] ? rtnl_net_dumpid_one+0x270/0x270
[ 19.368511][ T69] ? cleanup_net+0x2d6/0x8b0
[ 19.368517][ T69] cleanup_net+0x3b2/0x8b0
[ 19.368521][ T69] ? net_passive_dec+0x190/0x190
[ 19.368526][ T69] ? rcu_is_watching+0x12/0xb0
[ 19.368539][ T69] process_one_work+0xe35/0x1650
[ 19.368550][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 19.368556][ T69] ? assign_work+0x168/0x240
[ 19.368560][ T69] worker_thread+0x591/0xcf0
[ 19.368566][ T69] ? rescuer_thread+0xd10/0xd10
[ 19.368570][ T69] kthread+0x37b/0x5f0
[ 19.368574][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 19.368576][ T69] ? ret_from_fork+0x1b/0x270
[ 19.368584][ T69] ? __lock_release+0x5d/0x170
[ 19.368589][ T69] ? rcu_is_watching+0x12/0xb0
[ 19.368593][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 19.368596][ T69] ret_from_fork+0x1db/0x270
[ 19.368599][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 19.368602][ T69] ret_from_fork_asm+0x11/0x20
[ 19.368616][ T69]
[ 19.368617][ T69]
[ 19.375342][ T69] Allocated by task 262:
[ 19.375472][ T69] kasan_save_stack+0x24/0x40
[ 19.375649][ T69] kasan_save_track+0x14/0x30
[ 19.375819][ T69] __kasan_kmalloc+0x7b/0x90
[ 19.375997][ T69] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 19.376169][ T69] alloc_netdev_mqs+0x7d/0x1370
[ 19.376343][ T69] ip6_tnl_init_net+0x102/0x3f0
[ 19.376520][ T69] ops_init+0x189/0x550
[ 19.376650][ T69] setup_net+0xf1/0x380
[ 19.376778][ T69] copy_net_ns+0x253/0x510
[ 19.376948][ T69] create_new_namespaces+0x35f/0x900
[ 19.377122][ T69] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 19.377299][ T69] ksys_unshare+0x2be/0x6e0
[ 19.377470][ T69] __x64_sys_unshare+0x31/0x40
[ 19.377640][ T69] do_syscall_64+0xc1/0xfd0
[ 19.377814][ T69] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 19.378023][ T69]
[ 19.378111][ T69] Freed by task 69:
[ 19.378240][ T69] kasan_save_stack+0x24/0x40
[ 19.378413][ T69] kasan_save_track+0x14/0x30
[ 19.378591][ T69] __kasan_save_free_info+0x3b/0x60
[ 19.378765][ T69] __kasan_slab_free+0x3f/0x60
[ 19.378934][ T69] kfree+0x21d/0x540
[ 19.379060][ T69] device_release+0x9c/0x210
[ 19.379234][ T69] kobject_cleanup+0xfe/0x360
[ 19.379407][ T69] netdev_run_todo+0x81f/0xc60
[ 19.379578][ T69] ops_undo_list+0x714/0x890
[ 19.379745][ T69] cleanup_net+0x3b2/0x8b0
[ 19.379927][ T69] process_one_work+0xe35/0x1650
[ 19.380099][ T69] worker_thread+0x591/0xcf0
[ 19.380271][ T69] kthread+0x37b/0x5f0
[ 19.380399][ T69] ret_from_fork+0x1db/0x270
[ 19.380573][ T69] ret_from_fork_asm+0x11/0x20
[ 19.380747][ T69]
[ 19.380839][ T69] The buggy address belongs to the object at ffff888008b8c000
[ 19.380839][ T69] which belongs to the cache kmalloc-4k of size 4096
[ 19.381246][ T69] The buggy address is located 1732 bytes inside of
[ 19.381246][ T69] freed 4096-byte region [ffff888008b8c000, ffff888008b8d000)
[ 19.381657][ T69]
[ 19.381744][ T69] The buggy address belongs to the physical page:
[ 19.381966][ T69] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8b88
[ 19.382273][ T69] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 19.382530][ T69] flags: 0x80000000000040(head|node=0|zone=1)
[ 19.382753][ T69] page_type: f5(slab)
[ 19.382892][ T69] raw: 0080000000000040 ffff888001043700 ffffea000024e010 ffffea0000224010
[ 19.383199][ T69] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 19.383502][ T69] head: 0080000000000040 ffff888001043700 ffffea000024e010 ffffea0000224010
[ 19.383810][ T69] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 19.384112][ T69] head: 0080000000000003 ffffea000022e201 00000000ffffffff 00000000ffffffff
[ 19.384421][ T69] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 19.384721][ T69] page dumped because: kasan: bad access detected
[ 19.384932][ T69]
[ 19.385018][ T69] Memory state around the buggy address:
[ 19.385182][ T69] ffff888008b8c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 19.385423][ T69] ffff888008b8c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 19.385667][ T69] >ffff888008b8c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 19.385916][ T69] ^
[ 19.386118][ T69] ffff888008b8c700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 19.386362][ T69] ffff888008b8c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 19.386606][ T69] ==================================================================
[ 19.387736][ T69] Disabling lock debugging due to kernel taint
[ 19.387975][ T69] ------------[ cut here ]------------
[ 19.388121][ T69] refcount_t: underflow; use-after-free.
[ 19.388321][ T69] WARNING: CPU: 1 PID: 69 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 19.388602][ T69] Modules linked in: nft_compat nf_tables
[ 19.389162][ T69] CPU: 1 UID: 0 PID: 69 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 19.389530][ T69] Tainted: [B]=BAD_PAGE
[ 19.389657][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.389849][ T69] Workqueue: netns cleanup_net
[ 19.390015][ T69] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 19.390211][ 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 a5 ba 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
[ 19.390825][ T69] RSP: 0018:ffffc900004a7a08 EFLAGS: 00010282
[ 19.391021][ T69] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 19.391247][ T69] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 19.391477][ T69] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff7740934
[ 19.391788][ T69] R10: 0000000000000003 R11: ffffc900004a7580 R12: 0000000000000001
[ 19.392010][ T69] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 19.392235][ T69] FS: 0000000000000000(0000) GS:ffff8880a9b88000(0000) knlGS:0000000000000000
[ 19.392511][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 19.392767][ T69] CR2: 00007f21edd2e000 CR3: 0000000070349002 CR4: 0000000000772ef0
[ 19.392991][ T69] PKRU: 55555554
[ 19.393111][ T69] Call Trace:
[ 19.393232][ T69]
[ 19.393314][ T69] netdev_run_todo+0x5f0/0xc60
[ 19.393482][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 19.393697][ T69] ? generic_xdp_install+0x410/0x410
[ 19.393850][ T69] ? net_generic+0xb1/0x1f0
[ 19.394006][ T69] ops_undo_list+0x714/0x890
[ 19.394157][ T69] ? rtnl_net_dumpid_one+0x270/0x270
[ 19.394304][ T69] ? cleanup_net+0x2d6/0x8b0
[ 19.394478][ T69] cleanup_net+0x3b2/0x8b0
[ 19.394685][ T69] ? net_passive_dec+0x190/0x190
[ 19.394837][ T69] ? rcu_is_watching+0x12/0xb0
[ 19.394992][ T69] process_one_work+0xe35/0x1650
[ 19.395149][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 19.395299][ T69] ? assign_work+0x168/0x240
[ 19.395459][ T69] worker_thread+0x591/0xcf0
[ 19.395611][ T69] ? rescuer_thread+0xd10/0xd10
[ 19.395768][ T69] kthread+0x37b/0x5f0
[ 19.395885][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 19.396032][ T69] ? ret_from_fork+0x1b/0x270
[ 19.396186][ T69] ? __lock_release+0x5d/0x170
[ 19.396341][ T69] ? rcu_is_watching+0x12/0xb0
[ 19.396500][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 19.396658][ T69] ret_from_fork+0x1db/0x270
[ 19.396806][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 19.396953][ T69] ret_from_fork_asm+0x11/0x20
[ 19.397109][ T69]
[ 19.397232][ T69] irq event stamp: 10099
[ 19.397346][ T69] hardirqs last enabled at (10099): [] finish_task_switch.isra.0+0x245/0x960
[ 19.397674][ T69] hardirqs last disabled at (10098): [] __schedule+0x94a/0x1b10
[ 19.397945][ T69] softirqs last enabled at (9902): [] handle_softirqs+0x352/0x610
[ 19.398213][ T69] softirqs last disabled at (9893): [] irq_exit_rcu+0xab/0x100
[ 19.398485][ T69] ---[ end trace 0000000000000000 ]---
[ 67.139532][ T844] udpgso_bench_tx (844) used greatest stack depth: 23832 bytes left