[ 17.347068][ T268] ip (268) used greatest stack depth: 24288 bytes left
[ 19.796897][ T291] veth0: renamed from veth-rt-1
[ 21.276635][ T299] veth0: renamed from veth-rt-2
[ 71.306459][ T12] ==================================================================
[ 71.306906][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 71.307343][ T12] Read of size 1 at addr ffff88800a5196c4 by task kworker/u16:0/12
[ 71.307713][ T12]
[ 71.307855][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 71.307865][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 71.307869][ T12] Workqueue: netns cleanup_net
[ 71.307892][ T12] Call Trace:
[ 71.307899][ T12]
[ 71.307903][ T12] dump_stack_lvl+0x82/0xc0
[ 71.307917][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 71.307937][ T12] ? kobject_put+0xbb/0xd0
[ 71.307942][ T12] print_report+0xb4/0x270
[ 71.307946][ T12] ? kobject_put+0xbb/0xd0
[ 71.307951][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 71.307957][ T12] ? kobject_put+0xbb/0xd0
[ 71.307962][ T12] kasan_report+0xca/0x100
[ 71.307968][ T12] ? kobject_put+0xbb/0xd0
[ 71.307977][ T12] kobject_put+0xbb/0xd0
[ 71.307983][ T12] netdev_run_todo+0x5f0/0xc60
[ 71.307994][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 71.307999][ T12] ? generic_xdp_install+0x410/0x410
[ 71.308004][ T12] ? net_generic+0xb1/0x1f0
[ 71.308023][ T12] ops_undo_list+0x714/0x890
[ 71.308031][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 71.308036][ T12] ? cleanup_net+0x2d6/0x8b0
[ 71.308046][ T12] cleanup_net+0x3b2/0x8b0
[ 71.308053][ T12] ? net_passive_dec+0x190/0x190
[ 71.308061][ T12] ? rcu_is_watching+0x12/0xb0
[ 71.308081][ T12] process_one_work+0xe35/0x1650
[ 71.308097][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 71.308107][ T12] ? assign_work+0x168/0x240
[ 71.308113][ T12] worker_thread+0x591/0xcf0
[ 71.308122][ T12] ? rescuer_thread+0xd10/0xd10
[ 71.308127][ T12] kthread+0x37b/0x5f0
[ 71.308133][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 71.308137][ T12] ? ret_from_fork+0x1b/0x270
[ 71.308155][ T12] ? __lock_release+0x5d/0x170
[ 71.308168][ T12] ? rcu_is_watching+0x12/0xb0
[ 71.308173][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 71.308179][ T12] ret_from_fork+0x1db/0x270
[ 71.308183][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 71.308188][ T12] ret_from_fork_asm+0x11/0x20
[ 71.308212][ T12]
[ 71.308214][ T12]
[ 71.318058][ T12] Allocated by task 275:
[ 71.318250][ T12] kasan_save_stack+0x24/0x40
[ 71.318530][ T12] kasan_save_track+0x14/0x30
[ 71.318785][ T12] __kasan_kmalloc+0x7b/0x90
[ 71.319041][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 71.319304][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 71.319593][ T12] ip6_tnl_init_net+0x102/0x3f0
[ 71.319846][ T12] ops_init+0x189/0x550
[ 71.320029][ T12] setup_net+0xf1/0x380
[ 71.320213][ T12] copy_net_ns+0x253/0x510
[ 71.320489][ T12] create_new_namespaces+0x35f/0x900
[ 71.320754][ T12] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 71.321029][ T12] ksys_unshare+0x2be/0x6e0
[ 71.321288][ T12] __x64_sys_unshare+0x31/0x40
[ 71.321560][ T12] do_syscall_64+0xc1/0xfd0
[ 71.321820][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 71.322140][ T12]
[ 71.322266][ T12] Freed by task 12:
[ 71.322472][ T12] kasan_save_stack+0x24/0x40
[ 71.322733][ T12] kasan_save_track+0x14/0x30
[ 71.322983][ T12] __kasan_save_free_info+0x3b/0x60
[ 71.323222][ T12] __kasan_slab_free+0x3f/0x60
[ 71.323496][ T12] kfree+0x21d/0x540
[ 71.323694][ T12] device_release+0x9c/0x210
[ 71.323955][ T12] kobject_cleanup+0xfe/0x360
[ 71.324203][ T12] netdev_run_todo+0x81f/0xc60
[ 71.324456][ T12] ops_undo_list+0x714/0x890
[ 71.324707][ T12] cleanup_net+0x3b2/0x8b0
[ 71.324941][ T12] process_one_work+0xe35/0x1650
[ 71.325181][ T12] worker_thread+0x591/0xcf0
[ 71.325415][ T12] kthread+0x37b/0x5f0
[ 71.325589][ T12] ret_from_fork+0x1db/0x270
[ 71.325828][ T12] ret_from_fork_asm+0x11/0x20
[ 71.326068][ T12]
[ 71.326193][ T12] The buggy address belongs to the object at ffff88800a519000
[ 71.326193][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 71.326751][ T12] The buggy address is located 1732 bytes inside of
[ 71.326751][ T12] freed 4096-byte region [ffff88800a519000, ffff88800a51a000)
[ 71.327325][ T12]
[ 71.327444][ T12] The buggy address belongs to the physical page:
[ 71.327727][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88800a51c000 pfn:0xa518
[ 71.328233][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 71.328632][ T12] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[ 71.328961][ T12] page_type: f5(slab)
[ 71.329305][ T12] raw: 0080000000000240 ffff888001043700 ffffea0000240610 ffffea00002e1010
[ 71.329741][ T12] raw: ffff88800a51c000 0000000000020001 00000000f5000000 0000000000000000
[ 71.330315][ T12] head: 0080000000000240 ffff888001043700 ffffea0000240610 ffffea00002e1010
[ 71.330742][ T12] head: ffff88800a51c000 0000000000020001 00000000f5000000 0000000000000000
[ 71.331165][ T12] head: 0080000000000003 ffffea0000294601 00000000ffffffff 00000000ffffffff
[ 71.331735][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 71.332159][ T12] page dumped because: kasan: bad access detected
[ 71.332596][ T12]
[ 71.332714][ T12] Memory state around the buggy address:
[ 71.332941][ T12] ffff88800a519580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 71.333313][ T12] ffff88800a519600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 71.333782][ T12] >ffff88800a519680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 71.334125][ T12] ^
[ 71.334412][ T12] ffff88800a519700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 71.334890][ T12] ffff88800a519780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 71.335222][ T12] ==================================================================
[ 71.335885][ T12] Disabling lock debugging due to kernel taint
[ 71.336113][ T12] ------------[ cut here ]------------
[ 71.336273][ T12] refcount_t: underflow; use-after-free.
[ 71.336476][ T12] WARNING: CPU: 3 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 71.336790][ T12] Modules linked in:
[ 71.336935][ T12] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 71.337309][ T12] Tainted: [B]=BAD_PAGE
[ 71.337433][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 71.337642][ T12] Workqueue: netns cleanup_net
[ 71.337822][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 71.338044][ 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 05 90 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
[ 71.338647][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 71.338878][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 71.339113][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 71.339376][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff2200934
[ 71.339626][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 71.339906][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 71.340159][ T12] FS: 0000000000000000(0000) GS:ffff8880d4888000(0000) knlGS:0000000000000000
[ 71.340468][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 71.340674][ T12] CR2: 00007f272398c000 CR3: 0000000077349001 CR4: 0000000000772ef0
[ 71.340937][ T12] PKRU: 55555554
[ 71.341080][ T12] Call Trace:
[ 71.341204][ T12]
[ 71.341298][ T12] netdev_run_todo+0x5f0/0xc60
[ 71.341467][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 71.341634][ T12] ? generic_xdp_install+0x410/0x410
[ 71.341795][ T12] ? net_generic+0xb1/0x1f0
[ 71.341995][ T12] ops_undo_list+0x714/0x890
[ 71.342159][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 71.342360][ T12] ? cleanup_net+0x2d6/0x8b0
[ 71.342535][ T12] cleanup_net+0x3b2/0x8b0
[ 71.342689][ T12] ? net_passive_dec+0x190/0x190
[ 71.342989][ T12] ? rcu_is_watching+0x12/0xb0
[ 71.343156][ T12] process_one_work+0xe35/0x1650
[ 71.343429][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 71.343593][ T12] ? assign_work+0x168/0x240
[ 71.343771][ T12] worker_thread+0x591/0xcf0
[ 71.343965][ T12] ? rescuer_thread+0xd10/0xd10
[ 71.344224][ T12] kthread+0x37b/0x5f0
[ 71.344355][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 71.344536][ T12] ? ret_from_fork+0x1b/0x270
[ 71.344694][ T12] ? __lock_release+0x5d/0x170
[ 71.344961][ T12] ? rcu_is_watching+0x12/0xb0
[ 71.345137][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 71.345394][ T12] ret_from_fork+0x1db/0x270
[ 71.345568][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 71.345726][ T12] ret_from_fork_asm+0x11/0x20
[ 71.345908][ T12]
[ 71.346037][ T12] irq event stamp: 18873
[ 71.346167][ T12] hardirqs last enabled at (18873): [] finish_task_switch.isra.0+0x245/0x960
[ 71.346512][ T12] hardirqs last disabled at (18872): [] __schedule+0x94a/0x1b10
[ 71.346800][ T12] softirqs last enabled at (18676): [] handle_softirqs+0x352/0x610
[ 71.347118][ T12] softirqs last disabled at (18669): [] irq_exit_rcu+0xab/0x100
[ 71.347410][ T12] ---[ end trace 0000000000000000 ]---