[ 16.329260][ T266] ip (266) used greatest stack depth: 24688 bytes left
[ 17.234148][ T282] veth0: renamed from veth-rt-1
[ 17.760671][ T285] ip (285) used greatest stack depth: 24176 bytes left
[ 18.926526][ T292] veth0: renamed from veth-rt-2
[ 27.218155][ T12] ==================================================================
[ 27.218442][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 27.218717][ T12] Read of size 1 at addr ffff88800eed16c4 by task kworker/u16:0/12
[ 27.218945][ T12]
[ 27.219038][ T12] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 27.219044][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 27.219047][ T12] Workqueue: netns cleanup_net
[ 27.219061][ T12] Call Trace:
[ 27.219063][ T12]
[ 27.219066][ T12] dump_stack_lvl+0x82/0xc0
[ 27.219075][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 27.219083][ T12] ? kobject_put+0xbb/0xd0
[ 27.219087][ T12] print_report+0xb4/0x270
[ 27.219091][ T12] ? kobject_put+0xbb/0xd0
[ 27.219094][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 27.219098][ T12] ? kobject_put+0xbb/0xd0
[ 27.219101][ T12] kasan_report+0xca/0x100
[ 27.219105][ T12] ? kobject_put+0xbb/0xd0
[ 27.219110][ T12] kobject_put+0xbb/0xd0
[ 27.219114][ T12] netdev_run_todo+0x5f0/0xc60
[ 27.219120][ T12] ? lockdep_hardirqs_on+0x7c/0x110
[ 27.219132][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 27.219136][ T12] ? generic_xdp_install+0x410/0x410
[ 27.219141][ T12] ? mutex_is_locked+0x1c/0x50
[ 27.219149][ T12] ops_undo_list+0x714/0x890
[ 27.219155][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 27.219158][ T12] ? cleanup_net+0x2d6/0x8b0
[ 27.219164][ T12] cleanup_net+0x3b2/0x8b0
[ 27.219169][ T12] ? net_passive_dec+0x190/0x190
[ 27.219174][ T12] ? rcu_is_watching+0x12/0xb0
[ 27.219182][ T12] process_one_work+0xe35/0x1650
[ 27.219192][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 27.219198][ T12] ? assign_work+0x168/0x240
[ 27.219202][ T12] worker_thread+0x591/0xcf0
[ 27.219208][ T12] ? rescuer_thread+0xd10/0xd10
[ 27.219212][ T12] kthread+0x37b/0x5f0
[ 27.219217][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.219220][ T12] ? ret_from_fork+0x1b/0x270
[ 27.219225][ T12] ? __lock_release+0x5d/0x170
[ 27.219229][ T12] ? rcu_is_watching+0x12/0xb0
[ 27.219233][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.219237][ T12] ret_from_fork+0x1db/0x270
[ 27.219239][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.219242][ T12] ret_from_fork_asm+0x11/0x20
[ 27.219253][ T12]
[ 27.219255][ T12]
[ 27.226001][ T12] Allocated by task 307:
[ 27.226218][ T12] kasan_save_stack+0x24/0x40
[ 27.226397][ T12] kasan_save_track+0x14/0x30
[ 27.226570][ T12] __kasan_kmalloc+0x7b/0x90
[ 27.226745][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 27.226997][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 27.227166][ T12] ip6_tnl_init_net+0x102/0x3f0
[ 27.227337][ T12] ops_init+0x189/0x550
[ 27.227466][ T12] setup_net+0xf1/0x380
[ 27.227593][ T12] copy_net_ns+0x253/0x510
[ 27.227868][ T12] create_new_namespaces+0x35f/0x900
[ 27.228057][ T12] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 27.228234][ T12] ksys_unshare+0x2be/0x6e0
[ 27.228402][ T12] __x64_sys_unshare+0x31/0x40
[ 27.228659][ T12] do_syscall_64+0xc1/0xfd0
[ 27.228845][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 27.229038][ T12]
[ 27.229117][ T12] Freed by task 12:
[ 27.229320][ T12] kasan_save_stack+0x24/0x40
[ 27.229479][ T12] kasan_save_track+0x14/0x30
[ 27.229666][ T12] __kasan_save_free_info+0x3b/0x60
[ 27.229842][ T12] __kasan_slab_free+0x3f/0x60
[ 27.230099][ T12] kfree+0x21d/0x540
[ 27.230229][ T12] device_release+0x9c/0x210
[ 27.230401][ T12] kobject_cleanup+0xfe/0x360
[ 27.230574][ T12] netdev_run_todo+0x81f/0xc60
[ 27.230742][ T12] ops_undo_list+0x714/0x890
[ 27.231000][ T12] cleanup_net+0x3b2/0x8b0
[ 27.231168][ T12] process_one_work+0xe35/0x1650
[ 27.231339][ T12] worker_thread+0x591/0xcf0
[ 27.231512][ T12] kthread+0x37b/0x5f0
[ 27.231738][ T12] ret_from_fork+0x1db/0x270
[ 27.231910][ T12] ret_from_fork_asm+0x11/0x20
[ 27.232082][ T12]
[ 27.232169][ T12] The buggy address belongs to the object at ffff88800eed1000
[ 27.232169][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 27.232659][ T12] The buggy address is located 1732 bytes inside of
[ 27.232659][ T12] freed 4096-byte region [ffff88800eed1000, ffff88800eed2000)
[ 27.233078][ T12]
[ 27.233165][ T12] The buggy address belongs to the physical page:
[ 27.233373][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88800eed4000 pfn:0xeed0
[ 27.233718][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 27.234067][ T12] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[ 27.234287][ T12] page_type: f5(slab)
[ 27.234421][ T12] raw: 0080000000000240 ffff888001043700 ffffea000039b610 ffffea0000332210
[ 27.234724][ T12] raw: ffff88800eed4000 0000000000020001 00000000f5000000 0000000000000000
[ 27.235021][ T12] head: 0080000000000240 ffff888001043700 ffffea000039b610 ffffea0000332210
[ 27.235436][ T12] head: ffff88800eed4000 0000000000020001 00000000f5000000 0000000000000000
[ 27.235739][ T12] head: 0080000000000003 ffffea00003bb401 00000000ffffffff 00000000ffffffff
[ 27.236128][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 27.236426][ T12] page dumped because: kasan: bad access detected
[ 27.236640][ T12]
[ 27.236724][ T12] Memory state around the buggy address:
[ 27.236978][ T12] ffff88800eed1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 27.237226][ T12] ffff88800eed1600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 27.237468][ T12] >ffff88800eed1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 27.237711][ T12] ^
[ 27.237909][ T12] ffff88800eed1700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 27.238155][ T12] ffff88800eed1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 27.238399][ T12] ==================================================================
[ 27.241412][ T12] Disabling lock debugging due to kernel taint
[ 27.241678][ T12] ------------[ cut here ]------------
[ 27.241857][ T12] refcount_t: underflow; use-after-free.
[ 27.242093][ T12] WARNING: CPU: 2 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 27.242423][ T12] Modules linked in: ipt_rpfilter nft_compat nf_tables
[ 27.242666][ T12] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 27.243624][ T12] Tainted: [B]=BAD_PAGE
[ 27.243846][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 27.244186][ T12] Workqueue: netns cleanup_net
[ 27.244447][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 27.244767][ T12] 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 86 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
[ 27.245451][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 27.245737][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 27.246078][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 27.246401][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff0fc0934
[ 27.246730][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 27.247066][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 27.247404][ T12] FS: 0000000000000000(0000) GS:ffff8880e3e08000(0000) knlGS:0000000000000000
[ 27.247764][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 27.248071][ T12] CR2: 00007f009cd2949d CR3: 0000000012f49001 CR4: 0000000000772ef0
[ 27.248404][ T12] PKRU: 55555554
[ 27.248620][ T12] Call Trace:
[ 27.248824][ T12]
[ 27.248991][ T12] netdev_run_todo+0x5f0/0xc60
[ 27.249251][ T12] ? lockdep_hardirqs_on+0x7c/0x110
[ 27.249501][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 27.249748][ T12] ? generic_xdp_install+0x410/0x410
[ 27.249994][ T12] ? mutex_is_locked+0x1c/0x50
[ 27.250231][ T12] ops_undo_list+0x714/0x890
[ 27.250468][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 27.250696][ T12] ? cleanup_net+0x2d6/0x8b0
[ 27.250930][ T12] cleanup_net+0x3b2/0x8b0
[ 27.251162][ T12] ? net_passive_dec+0x190/0x190
[ 27.251391][ T12] ? rcu_is_watching+0x12/0xb0
[ 27.251627][ T12] process_one_work+0xe35/0x1650
[ 27.251862][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 27.252092][ T12] ? assign_work+0x168/0x240
[ 27.252318][ T12] worker_thread+0x591/0xcf0
[ 27.252554][ T12] ? rescuer_thread+0xd10/0xd10
[ 27.252789][ T12] kthread+0x37b/0x5f0
[ 27.252982][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.253218][ T12] ? ret_from_fork+0x1b/0x270
[ 27.253450][ T12] ? __lock_release+0x5d/0x170
[ 27.253715][ T12] ? rcu_is_watching+0x12/0xb0
[ 27.253897][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.254079][ T12] ret_from_fork+0x1db/0x270
[ 27.254257][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 27.254430][ T12] ret_from_fork_asm+0x11/0x20
[ 27.254615][ T12]
[ 27.254762][ T12] irq event stamp: 14095
[ 27.254901][ T12] hardirqs last enabled at (14095): [] finish_task_switch.isra.0+0x245/0x960
[ 27.255257][ T12] hardirqs last disabled at (14094): [] __schedule+0x94a/0x1b10
[ 27.255555][ T12] softirqs last enabled at (13924): [] handle_softirqs+0x352/0x610
[ 27.255843][ T12] softirqs last disabled at (13917): [] irq_exit_rcu+0xab/0x100
[ 27.256154][ T12] ---[ end trace 0000000000000000 ]---