[ 17.048233][ T283] ip (283) used greatest stack depth: 24528 bytes left
[ 22.784413][ T330] Initializing XFRM netlink socket
[ 779.569938][ T69] ==================================================================
[ 779.570287][ T69] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 779.570556][ T69] Read of size 1 at addr ffff8880085296c4 by task kworker/u16:1/69
[ 779.570794][ T69]
[ 779.570892][ T69] CPU: 3 UID: 0 PID: 69 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 779.570897][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 779.570902][ T69] Workqueue: netns cleanup_net
[ 779.570917][ T69] Call Trace:
[ 779.570921][ T69]
[ 779.570924][ T69] dump_stack_lvl+0x82/0xc0
[ 779.570931][ T69] print_address_description.constprop.0+0x2c/0x3a0
[ 779.570943][ T69] ? kobject_put+0xbb/0xd0
[ 779.570949][ T69] print_report+0xb4/0x270
[ 779.570952][ T69] ? kobject_put+0xbb/0xd0
[ 779.570955][ T69] ? kasan_addr_to_slab+0x21/0x70
[ 779.570959][ T69] ? kobject_put+0xbb/0xd0
[ 779.570962][ T69] kasan_report+0xca/0x100
[ 779.570967][ T69] ? kobject_put+0xbb/0xd0
[ 779.570972][ T69] kobject_put+0xbb/0xd0
[ 779.570976][ T69] netdev_run_todo+0x5f0/0xc60
[ 779.570982][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 779.570986][ T69] ? generic_xdp_install+0x410/0x410
[ 779.570989][ T69] ? net_generic+0xb1/0x1f0
[ 779.571001][ T69] ops_undo_list+0x714/0x890
[ 779.571007][ T69] ? rtnl_net_dumpid_one+0x270/0x270
[ 779.571010][ T69] ? cleanup_net+0x2d6/0x8b0
[ 779.571016][ T69] cleanup_net+0x3b2/0x8b0
[ 779.571020][ T69] ? net_passive_dec+0x190/0x190
[ 779.571025][ T69] ? rcu_is_watching+0x12/0xb0
[ 779.571036][ T69] process_one_work+0xe35/0x1650
[ 779.571047][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 779.571052][ T69] ? assign_work+0x168/0x240
[ 779.571057][ T69] worker_thread+0x591/0xcf0
[ 779.571063][ T69] ? rescuer_thread+0xd10/0xd10
[ 779.571067][ T69] kthread+0x37b/0x5f0
[ 779.571071][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 779.571074][ T69] ? ret_from_fork+0x1b/0x270
[ 779.571083][ T69] ? __lock_release+0x5d/0x170
[ 779.571089][ T69] ? rcu_is_watching+0x12/0xb0
[ 779.571092][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 779.571096][ T69] ret_from_fork+0x1db/0x270
[ 779.571098][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 779.571102][ T69] ret_from_fork_asm+0x11/0x20
[ 779.571112][ T69]
[ 779.571114][ T69]
[ 779.577711][ T69] Allocated by task 263:
[ 779.577844][ T69] kasan_save_stack+0x24/0x40
[ 779.578008][ T69] kasan_save_track+0x14/0x30
[ 779.578171][ T69] __kasan_kmalloc+0x7b/0x90
[ 779.578328][ T69] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 779.578500][ T69] alloc_netdev_mqs+0x7d/0x1370
[ 779.578658][ T69] ip6_tnl_init_net+0x102/0x3f0
[ 779.578818][ T69] ops_init+0x189/0x550
[ 779.578947][ T69] setup_net+0xf1/0x380
[ 779.579067][ T69] copy_net_ns+0x253/0x510
[ 779.579229][ T69] create_new_namespaces+0x35f/0x900
[ 779.579388][ T69] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 779.579556][ T69] ksys_unshare+0x2be/0x6e0
[ 779.579713][ T69] __x64_sys_unshare+0x31/0x40
[ 779.579874][ T69] do_syscall_64+0xc1/0xfd0
[ 779.580121][ T69] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 779.580321][ T69]
[ 779.580402][ T69] Freed by task 69:
[ 779.580523][ T69] kasan_save_stack+0x24/0x40
[ 779.580680][ T69] kasan_save_track+0x14/0x30
[ 779.580851][ T69] __kasan_save_free_info+0x3b/0x60
[ 779.581009][ T69] __kasan_slab_free+0x3f/0x60
[ 779.581175][ T69] kfree+0x21d/0x540
[ 779.581296][ T69] device_release+0x9c/0x210
[ 779.581471][ T69] kobject_cleanup+0xfe/0x360
[ 779.581722][ T69] netdev_run_todo+0x81f/0xc60
[ 779.581883][ T69] ops_undo_list+0x714/0x890
[ 779.582039][ T69] cleanup_net+0x3b2/0x8b0
[ 779.582296][ T69] process_one_work+0xe35/0x1650
[ 779.582466][ T69] worker_thread+0x591/0xcf0
[ 779.582624][ T69] kthread+0x37b/0x5f0
[ 779.582742][ T69] ret_from_fork+0x1db/0x270
[ 779.582996][ T69] ret_from_fork_asm+0x11/0x20
[ 779.583156][ T69]
[ 779.583250][ T69] The buggy address belongs to the object at ffff888008529000
[ 779.583250][ T69] which belongs to the cache kmalloc-4k of size 4096
[ 779.583635][ T69] The buggy address is located 1732 bytes inside of
[ 779.583635][ T69] freed 4096-byte region [ffff888008529000, ffff88800852a000)
[ 779.584014][ T69]
[ 779.584092][ T69] The buggy address belongs to the physical page:
[ 779.584297][ T69] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8528
[ 779.584680][ T69] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 779.584933][ T69] flags: 0x80000000000040(head|node=0|zone=1)
[ 779.585241][ T69] page_type: f5(slab)
[ 779.585365][ T69] raw: 0080000000000040 ffff888001043700 ffffea0000231610 ffffea0000230010
[ 779.585653][ T69] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 779.586032][ T69] head: 0080000000000040 ffff888001043700 ffffea0000231610 ffffea0000230010
[ 779.586327][ T69] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 779.586703][ T69] head: 0080000000000003 ffffea0000214a01 00000000ffffffff 00000000ffffffff
[ 779.586987][ T69] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 779.587362][ T69] page dumped because: kasan: bad access detected
[ 779.587580][ T69]
[ 779.587658][ T69] Memory state around the buggy address:
[ 779.587809][ T69] ffff888008529580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 779.588049][ T69] ffff888008529600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 779.588284][ T69] >ffff888008529680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 779.588526][ T69] ^
[ 779.588713][ T69] ffff888008529700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 779.588947][ T69] ffff888008529780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 779.589267][ T69] ==================================================================
[ 779.589598][ T69] Disabling lock debugging due to kernel taint
[ 779.590333][ T69] ------------[ cut here ]------------
[ 779.590621][ T69] refcount_t: underflow; use-after-free.
[ 779.590840][ T69] WARNING: CPU: 2 PID: 69 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 779.591138][ T69] Modules linked in: xfrm_user xt_policy nft_compat nf_tables
[ 779.591401][ T69] CPU: 2 UID: 0 PID: 69 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 779.591784][ T69] Tainted: [B]=BAD_PAGE
[ 779.591923][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 779.592134][ T69] Workqueue: netns cleanup_net
[ 779.592318][ T69] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 779.592534][ 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 65 93 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
[ 779.593122][ T69] RSP: 0018:ffffc900004a7a08 EFLAGS: 00010282
[ 779.593338][ T69] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 779.593600][ T69] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 779.593868][ T69] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff28c0934
[ 779.594119][ T69] R10: 0000000000000003 R11: ffffc900004a7580 R12: 0000000000000001
[ 779.594372][ T69] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 779.594626][ T69] FS: 0000000000000000(0000) GS:ffff8880d7608000(0000) knlGS:0000000000000000
[ 779.594917][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 779.595136][ T69] CR2: 00007ffd78e58d58 CR3: 000000000db6f006 CR4: 0000000000772ef0
[ 779.595394][ T69] PKRU: 55555554
[ 779.595533][ T69] Call Trace:
[ 779.595680][ T69]
[ 779.595789][ T69] netdev_run_todo+0x5f0/0xc60
[ 779.595967][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 779.596148][ T69] ? generic_xdp_install+0x410/0x410
[ 779.596342][ T69] ? net_generic+0xb1/0x1f0
[ 779.596520][ T69] ops_undo_list+0x714/0x890
[ 779.596706][ T69] ? rtnl_net_dumpid_one+0x270/0x270
[ 779.596878][ T69] ? cleanup_net+0x2d6/0x8b0
[ 779.597050][ T69] cleanup_net+0x3b2/0x8b0
[ 779.597225][ T69] ? net_passive_dec+0x190/0x190
[ 779.597401][ T69] ? rcu_is_watching+0x12/0xb0
[ 779.597586][ T69] process_one_work+0xe35/0x1650
[ 779.597782][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 779.597955][ T69] ? assign_work+0x168/0x240
[ 779.598132][ T69] worker_thread+0x591/0xcf0
[ 779.598309][ T69] ? rescuer_thread+0xd10/0xd10
[ 779.598481][ T69] kthread+0x37b/0x5f0
[ 779.598616][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 779.598795][ T69] ? ret_from_fork+0x1b/0x270
[ 779.598971][ T69] ? __lock_release+0x5d/0x170
[ 779.599146][ T69] ? rcu_is_watching+0x12/0xb0
[ 779.599325][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 779.599501][ T69] ret_from_fork+0x1db/0x270
[ 779.599674][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 779.599851][ T69] ret_from_fork_asm+0x11/0x20
[ 779.600031][ T69]
[ 779.600170][ T69] irq event stamp: 21809
[ 779.600305][ T69] hardirqs last enabled at (21809): [] finish_task_switch.isra.0+0x245/0x960
[ 779.600632][ T69] hardirqs last disabled at (21808): [] __schedule+0x94a/0x1b10
[ 779.600928][ T69] softirqs last enabled at (21638): [] handle_softirqs+0x352/0x610
[ 779.601216][ T69] softirqs last disabled at (21631): [] irq_exit_rcu+0xab/0x100
[ 779.601497][ T69] ---[ end trace 0000000000000000 ]---