[ 19.996480][ T12] ==================================================================
[ 19.996992][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 19.997365][ T12] Read of size 1 at addr ffff88800f42c6c4 by task kworker/u16:0/12
[ 19.997729][ T12]
[ 19.997901][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 19.997918][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.997926][ T12] Workqueue: netns cleanup_net
[ 19.997943][ T12] Call Trace:
[ 19.997949][ T12]
[ 19.997953][ T12] dump_stack_lvl+0x82/0xc0
[ 19.997962][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 19.997979][ T12] ? kobject_put+0xbb/0xd0
[ 19.997983][ T12] print_report+0xb4/0x270
[ 19.997987][ T12] ? kobject_put+0xbb/0xd0
[ 19.997990][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 19.997995][ T12] ? kobject_put+0xbb/0xd0
[ 19.997997][ T12] kasan_report+0xca/0x100
[ 19.998001][ T12] ? kobject_put+0xbb/0xd0
[ 19.998007][ T12] kobject_put+0xbb/0xd0
[ 19.998010][ T12] netdev_run_todo+0x5f0/0xc60
[ 19.998017][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 19.998020][ T12] ? generic_xdp_install+0x410/0x410
[ 19.998023][ T12] ? net_generic+0xb1/0x1f0
[ 19.998035][ T12] ops_undo_list+0x714/0x890
[ 19.998040][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 19.998043][ T12] ? cleanup_net+0x2d6/0x8b0
[ 19.998049][ T12] cleanup_net+0x3b2/0x8b0
[ 19.998053][ T12] ? net_passive_dec+0x190/0x190
[ 19.998058][ T12] ? rcu_is_watching+0x12/0xb0
[ 19.998073][ T12] process_one_work+0xe35/0x1650
[ 19.998087][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 19.998093][ T12] ? assign_work+0x168/0x240
[ 19.998097][ T12] worker_thread+0x591/0xcf0
[ 19.998103][ T12] ? rescuer_thread+0xd10/0xd10
[ 19.998107][ T12] kthread+0x37b/0x5f0
[ 19.998111][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 19.998114][ T12] ? ret_from_fork+0x1b/0x270
[ 19.998122][ T12] ? __lock_release+0x5d/0x170
[ 19.998128][ T12] ? rcu_is_watching+0x12/0xb0
[ 19.998134][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 19.998142][ T12] ret_from_fork+0x1db/0x270
[ 19.998146][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 19.998150][ T12] ret_from_fork_asm+0x11/0x20
[ 19.998161][ T12]
[ 19.998162][ T12]
[ 20.006408][ T12] Allocated by task 263:
[ 20.006546][ T12] kasan_save_stack+0x24/0x40
[ 20.006831][ T12] kasan_save_track+0x14/0x30
[ 20.007053][ T12] __kasan_kmalloc+0x7b/0x90
[ 20.007234][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 20.007422][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 20.007610][ T12] ip6_tnl_init_net+0x102/0x3f0
[ 20.007795][ T12] ops_init+0x189/0x550
[ 20.007964][ T12] setup_net+0xf1/0x380
[ 20.008097][ T12] copy_net_ns+0x253/0x510
[ 20.008273][ T12] create_new_namespaces+0x35f/0x900
[ 20.008451][ T12] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 20.008621][ T12] ksys_unshare+0x2be/0x6e0
[ 20.008901][ T12] __x64_sys_unshare+0x31/0x40
[ 20.009105][ T12] do_syscall_64+0xc1/0xfd0
[ 20.009361][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 20.009619][ T12]
[ 20.009743][ T12] Freed by task 12:
[ 20.009899][ T12] kasan_save_stack+0x24/0x40
[ 20.010199][ T12] kasan_save_track+0x14/0x30
[ 20.010381][ T12] __kasan_save_free_info+0x3b/0x60
[ 20.010575][ T12] __kasan_slab_free+0x3f/0x60
[ 20.010754][ T12] kfree+0x21d/0x540
[ 20.010885][ T12] device_release+0x9c/0x210
[ 20.011120][ T12] kobject_cleanup+0xfe/0x360
[ 20.011316][ T12] netdev_run_todo+0x81f/0xc60
[ 20.011491][ T12] ops_undo_list+0x714/0x890
[ 20.011663][ T12] cleanup_net+0x3b2/0x8b0
[ 20.011853][ T12] process_one_work+0xe35/0x1650
[ 20.012043][ T12] worker_thread+0x591/0xcf0
[ 20.012240][ T12] kthread+0x37b/0x5f0
[ 20.012380][ T12] ret_from_fork+0x1db/0x270
[ 20.012550][ T12] ret_from_fork_asm+0x11/0x20
[ 20.012745][ T12]
[ 20.012876][ T12] The buggy address belongs to the object at ffff88800f42c000
[ 20.012876][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 20.013430][ T12] The buggy address is located 1732 bytes inside of
[ 20.013430][ T12] freed 4096-byte region [ffff88800f42c000, ffff88800f42d000)
[ 20.013897][ T12]
[ 20.014007][ T12] The buggy address belongs to the physical page:
[ 20.014283][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf428
[ 20.014659][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 20.014963][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 20.015245][ T12] page_type: f5(slab)
[ 20.015408][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000447210 ffffea00001c9610
[ 20.015825][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 20.016215][ T12] head: 0080000000000040 ffff888001043700 ffffea0000447210 ffffea00001c9610
[ 20.016635][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 20.017025][ T12] head: 0080000000000003 ffffea00003d0a01 00000000ffffffff 00000000ffffffff
[ 20.017379][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 20.017734][ T12] page dumped because: kasan: bad access detected
[ 20.017988][ T12]
[ 20.018099][ T12] Memory state around the buggy address:
[ 20.018370][ T12] ffff88800f42c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 20.018773][ T12] ffff88800f42c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 20.019108][ T12] >ffff88800f42c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 20.019370][ T12] ^
[ 20.019646][ T12] ffff88800f42c700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 20.020091][ T12] ffff88800f42c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 20.020464][ T12] ==================================================================
[ 20.020933][ T12] Disabling lock debugging due to kernel taint
[ 20.021191][ T12] ------------[ cut here ]------------
[ 20.021408][ T12] refcount_t: underflow; use-after-free.
[ 20.021610][ T12] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 20.022024][ T12] Modules linked in: ila
[ 20.022190][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 20.022695][ T12] Tainted: [B]=BAD_PAGE
[ 20.022823][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.023112][ T12] Workqueue: netns cleanup_net
[ 20.023300][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 20.023604][ 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 a5 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
[ 20.024392][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 20.024753][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 20.025056][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 20.025331][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff4dc0934
[ 20.025579][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 20.025840][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 20.026126][ T12] FS: 0000000000000000(0000) GS:ffff8880c4d08000(0000) knlGS:0000000000000000
[ 20.026481][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 20.026751][ T12] CR2: 00007ffbb4c4f000 CR3: 000000000cb49001 CR4: 0000000000772ef0
[ 20.027058][ T12] PKRU: 55555554
[ 20.027252][ T12] Call Trace:
[ 20.027402][ T12]
[ 20.027503][ T12] netdev_run_todo+0x5f0/0xc60
[ 20.027691][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 20.027971][ T12] ? generic_xdp_install+0x410/0x410
[ 20.028152][ T12] ? net_generic+0xb1/0x1f0
[ 20.028325][ T12] ops_undo_list+0x714/0x890
[ 20.028492][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 20.028672][ T12] ? cleanup_net+0x2d6/0x8b0
[ 20.028842][ T12] cleanup_net+0x3b2/0x8b0
[ 20.029093][ T12] ? net_passive_dec+0x190/0x190
[ 20.029304][ T12] ? rcu_is_watching+0x12/0xb0
[ 20.029523][ T12] process_one_work+0xe35/0x1650
[ 20.029710][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 20.029952][ T12] ? assign_work+0x168/0x240
[ 20.030157][ T12] worker_thread+0x591/0xcf0
[ 20.030349][ T12] ? rescuer_thread+0xd10/0xd10
[ 20.030577][ T12] kthread+0x37b/0x5f0
[ 20.030712][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 20.030995][ T12] ? ret_from_fork+0x1b/0x270
[ 20.031273][ T12] ? __lock_release+0x5d/0x170
[ 20.031477][ T12] ? rcu_is_watching+0x12/0xb0
[ 20.031755][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 20.031958][ T12] ret_from_fork+0x1db/0x270
[ 20.032180][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 20.032352][ T12] ret_from_fork_asm+0x11/0x20
[ 20.032537][ T12]
[ 20.032668][ T12] irq event stamp: 13801
[ 20.032828][ T12] hardirqs last enabled at (13801): [] finish_task_switch.isra.0+0x245/0x960
[ 20.033218][ T12] hardirqs last disabled at (13800): [] __schedule+0x94a/0x1b10
[ 20.033533][ T12] softirqs last enabled at (13700): [] handle_softirqs+0x352/0x610
[ 20.033872][ T12] softirqs last disabled at (13695): [] irq_exit_rcu+0xab/0x100
[ 20.034284][ T12] ---[ end trace 0000000000000000 ]---
[ 22.052032][ T309] veth0: renamed from veth-alpha
[ 22.123024][ T310] veth0: renamed from veth-betaL
[ 22.238264][ T311] veth1: renamed from veth-betaR
[ 22.322216][ T312] veth0: renamed from veth-gamma
[ 31.289929][ T335] lwtunnel_output(): recursion limit reached on datapath
[ 32.312167][ T335] lwtunnel_output(): recursion limit reached on datapath
[ 40.313240][ C3] lwtunnel_input(): recursion limit reached on datapath
[ 41.344730][ C3] lwtunnel_input(): recursion limit reached on datapath
[ 43.534549][ T348] lwtunnel_output(): recursion limit reached on datapath
[ 44.536544][ T348] lwtunnel_output(): recursion limit reached on datapath
[ 47.875352][ C3] lwtunnel_input(): recursion limit reached on datapath
[ 48.888880][ C3] lwtunnel_input(): recursion limit reached on datapath
[ 51.110374][ T354] lwtunnel_output(): recursion limit reached on datapath
[ 52.152723][ T354] lwtunnel_output(): recursion limit reached on datapath
[ 53.159454][ T354] ping6 (354) used greatest stack depth: 22616 bytes left