[ 17.546512][ T273] ip (273) used greatest stack depth: 24688 bytes left
[ 29.130938][ T329] udpgso_bench_tx (329) used greatest stack depth: 24216 bytes left
[ 29.524668][ T12] ==================================================================
[ 29.525018][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 29.525331][ T12] Read of size 1 at addr ffff88800f33c6c4 by task kworker/u16:0/12
[ 29.525590][ T12]
[ 29.525698][ T12] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 29.525703][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 29.525706][ T12] Workqueue: netns cleanup_net
[ 29.525715][ T12] Call Trace:
[ 29.525717][ T12]
[ 29.525722][ T12] dump_stack_lvl+0x82/0xc0
[ 29.525727][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 29.525735][ T12] ? kobject_put+0xbb/0xd0
[ 29.525738][ T12] print_report+0xb4/0x270
[ 29.525742][ T12] ? kobject_put+0xbb/0xd0
[ 29.525745][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 29.525749][ T12] ? kobject_put+0xbb/0xd0
[ 29.525752][ T12] kasan_report+0xca/0x100
[ 29.525755][ T12] ? kobject_put+0xbb/0xd0
[ 29.525761][ T12] kobject_put+0xbb/0xd0
[ 29.525764][ T12] netdev_run_todo+0x5f0/0xc60
[ 29.525771][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 29.525775][ T12] ? generic_xdp_install+0x410/0x410
[ 29.525777][ T12] ? net_generic+0xb1/0x1f0
[ 29.525786][ T12] ops_undo_list+0x714/0x890
[ 29.525792][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 29.525795][ T12] ? cleanup_net+0x2d6/0x8b0
[ 29.525802][ T12] cleanup_net+0x3b2/0x8b0
[ 29.525806][ T12] ? net_passive_dec+0x190/0x190
[ 29.525811][ T12] ? rcu_is_watching+0x12/0xb0
[ 29.525818][ T12] process_one_work+0xe35/0x1650
[ 29.525827][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 29.525833][ T12] ? assign_work+0x168/0x240
[ 29.525837][ T12] worker_thread+0x591/0xcf0
[ 29.525843][ T12] ? rescuer_thread+0xd10/0xd10
[ 29.525846][ T12] kthread+0x37b/0x5f0
[ 29.525850][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 29.525853][ T12] ? ret_from_fork+0x1b/0x270
[ 29.525859][ T12] ? __lock_release+0x5d/0x170
[ 29.525865][ T12] ? rcu_is_watching+0x12/0xb0
[ 29.525870][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 29.525875][ T12] ret_from_fork+0x1db/0x270
[ 29.525879][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 29.525884][ T12] ret_from_fork_asm+0x11/0x20
[ 29.525897][ T12]
[ 29.525898][ T12]
[ 29.532391][ T12] Allocated by task 271:
[ 29.532519][ T12] kasan_save_stack+0x24/0x40
[ 29.532689][ T12] kasan_save_track+0x14/0x30
[ 29.532850][ T12] __kasan_kmalloc+0x7b/0x90
[ 29.533039][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 29.533205][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 29.533371][ T12] ip6_tnl_init_net+0x102/0x3f0
[ 29.533535][ T12] ops_init+0x189/0x550
[ 29.533662][ T12] setup_net+0xf1/0x380
[ 29.533789][ T12] copy_net_ns+0x253/0x510
[ 29.533967][ T12] create_new_namespaces+0x35f/0x900
[ 29.534126][ T12] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 29.534282][ T12] ksys_unshare+0x2be/0x6e0
[ 29.534539][ T12] __x64_sys_unshare+0x31/0x40
[ 29.534708][ T12] do_syscall_64+0xc1/0xfd0
[ 29.534881][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 29.535106][ T12]
[ 29.535188][ T12] Freed by task 12:
[ 29.535309][ T12] kasan_save_stack+0x24/0x40
[ 29.535487][ T12] kasan_save_track+0x14/0x30
[ 29.535657][ T12] __kasan_save_free_info+0x3b/0x60
[ 29.535826][ T12] __kasan_slab_free+0x3f/0x60
[ 29.536093][ T12] kfree+0x21d/0x540
[ 29.536225][ T12] device_release+0x9c/0x210
[ 29.536393][ T12] kobject_cleanup+0xfe/0x360
[ 29.536562][ T12] netdev_run_todo+0x81f/0xc60
[ 29.536731][ T12] ops_undo_list+0x714/0x890
[ 29.536915][ T12] cleanup_net+0x3b2/0x8b0
[ 29.537089][ T12] process_one_work+0xe35/0x1650
[ 29.537261][ T12] worker_thread+0x591/0xcf0
[ 29.537506][ T12] kthread+0x37b/0x5f0
[ 29.537625][ T12] ret_from_fork+0x1db/0x270
[ 29.537795][ T12] ret_from_fork_asm+0x11/0x20
[ 29.537976][ T12]
[ 29.538059][ T12] The buggy address belongs to the object at ffff88800f33c000
[ 29.538059][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 29.538526][ T12] The buggy address is located 1732 bytes inside of
[ 29.538526][ T12] freed 4096-byte region [ffff88800f33c000, ffff88800f33d000)
[ 29.539021][ T12]
[ 29.539109][ T12] The buggy address belongs to the physical page:
[ 29.539312][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88800f339000 pfn:0xf338
[ 29.539748][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 29.540024][ T12] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[ 29.540235][ T12] page_type: f5(slab)
[ 29.540372][ T12] raw: 0080000000000240 ffff888001043700 ffffea0000257810 ffffea00003cde10
[ 29.540773][ T12] raw: ffff88800f339000 0000000000020001 00000000f5000000 0000000000000000
[ 29.541085][ T12] head: 0080000000000240 ffff888001043700 ffffea0000257810 ffffea00003cde10
[ 29.541471][ T12] head: ffff88800f339000 0000000000020001 00000000f5000000 0000000000000000
[ 29.541798][ T12] head: 0080000000000003 ffffea00003cce01 00000000ffffffff 00000000ffffffff
[ 29.542206][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 29.542492][ T12] page dumped because: kasan: bad access detected
[ 29.542739][ T12]
[ 29.542920][ T12] Memory state around the buggy address:
[ 29.543083][ T12] ffff88800f33c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 29.543326][ T12] ffff88800f33c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 29.543648][ T12] >ffff88800f33c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 29.543921][ T12] ^
[ 29.544121][ T12] ffff88800f33c700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 29.544445][ T12] ffff88800f33c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 29.544680][ T12] ==================================================================
[ 29.545015][ T12] Disabling lock debugging due to kernel taint
[ 29.545379][ T12] ------------[ cut here ]------------
[ 29.545606][ T12] refcount_t: underflow; use-after-free.
[ 29.545879][ T12] WARNING: CPU: 1 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 29.546249][ T12] Modules linked in: cls_bpf sch_ingress
[ 29.546471][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 29.546930][ T12] Tainted: [B]=BAD_PAGE
[ 29.547065][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 29.547299][ T12] Workqueue: netns cleanup_net
[ 29.547558][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 29.547838][ 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 a5 a2 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
[ 29.548521][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 29.548940][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 29.549300][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 29.549623][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff4740934
[ 29.550154][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 29.550572][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 29.550993][ T12] FS: 0000000000000000(0000) GS:ffff8880c8188000(0000) knlGS:0000000000000000
[ 29.551378][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 29.551712][ T12] CR2: 00007f59f08658cf CR3: 0000000066149001 CR4: 0000000000772ef0
[ 29.552078][ T12] PKRU: 55555554
[ 29.552255][ T12] Call Trace:
[ 29.552462][ T12]
[ 29.552558][ T12] netdev_run_todo+0x5f0/0xc60
[ 29.552859][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 29.553142][ T12] ? generic_xdp_install+0x410/0x410
[ 29.553420][ T12] ? net_generic+0xb1/0x1f0
[ 29.553706][ T12] ops_undo_list+0x714/0x890
[ 29.553991][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 29.554259][ T12] ? cleanup_net+0x2d6/0x8b0
[ 29.554514][ T12] cleanup_net+0x3b2/0x8b0
[ 29.554788][ T12] ? net_passive_dec+0x190/0x190
[ 29.555082][ T12] ? rcu_is_watching+0x12/0xb0
[ 29.555344][ T12] process_one_work+0xe35/0x1650
[ 29.555620][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 29.555909][ T12] ? assign_work+0x168/0x240
[ 29.556174][ T12] worker_thread+0x591/0xcf0
[ 29.556464][ T12] ? rescuer_thread+0xd10/0xd10
[ 29.556747][ T12] kthread+0x37b/0x5f0
[ 29.556962][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 29.557231][ T12] ? ret_from_fork+0x1b/0x270
[ 29.557503][ T12] ? __lock_release+0x5d/0x170
[ 29.557789][ T12] ? rcu_is_watching+0x12/0xb0
[ 29.558070][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 29.558339][ T12] ret_from_fork+0x1db/0x270
[ 29.558609][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 29.558903][ T12] ret_from_fork_asm+0x11/0x20
[ 29.559185][ T12]
[ 29.559399][ T12] irq event stamp: 10443
[ 29.559609][ T12] hardirqs last enabled at (10443): [] finish_task_switch.isra.0+0x245/0x960
[ 29.560167][ T12] hardirqs last disabled at (10442): [] __schedule+0x94a/0x1b10
[ 29.560657][ T12] softirqs last enabled at (10168): [] handle_softirqs+0x352/0x610
[ 29.561136][ T12] softirqs last disabled at (10157): [] irq_exit_rcu+0xab/0x100
[ 29.561611][ T12] ---[ end trace 0000000000000000 ]---