[ 16.719138][ T252] ip (252) used greatest stack depth: 23760 bytes left
[ 135.684334][ T12] ==================================================================
[ 135.684599][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 135.684832][ T12] Read of size 1 at addr ffff88800904c6ac by task kworker/u16:0/12
[ 135.685059][ T12]
[ 135.685139][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 135.685144][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 135.685147][ T12] Workqueue: netns cleanup_net
[ 135.685157][ T12] Call Trace:
[ 135.685159][ T12]
[ 135.685161][ T12] dump_stack_lvl+0x82/0xc0
[ 135.685168][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 135.685179][ T12] ? kobject_put+0xbb/0xd0
[ 135.685183][ T12] print_report+0xb4/0x270
[ 135.685187][ T12] ? kobject_put+0xbb/0xd0
[ 135.685191][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 135.685194][ T12] ? kobject_put+0xbb/0xd0
[ 135.685198][ T12] kasan_report+0xca/0x100
[ 135.685202][ T12] ? kobject_put+0xbb/0xd0
[ 135.685208][ T12] kobject_put+0xbb/0xd0
[ 135.685212][ T12] netdev_run_todo+0x5f0/0xc60
[ 135.685217][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 135.685220][ T12] ? generic_xdp_install+0x410/0x410
[ 135.685228][ T12] ops_undo_list+0x714/0x890
[ 135.685234][ T12] ? netns_get+0x110/0x110
[ 135.685238][ T12] ? cleanup_net+0x2d6/0x830
[ 135.685243][ T12] cleanup_net+0x3b2/0x830
[ 135.685246][ T12] ? net_passive_dec+0x190/0x190
[ 135.685250][ T12] ? rcu_is_watching+0x12/0xb0
[ 135.685255][ T12] process_one_work+0xe35/0x1650
[ 135.685263][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 135.685269][ T12] ? assign_work+0x168/0x240
[ 135.685273][ T12] worker_thread+0x591/0xcf0
[ 135.685278][ T12] ? rescuer_thread+0xd10/0xd10
[ 135.685282][ T12] kthread+0x37b/0x5f0
[ 135.685286][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 135.685289][ T12] ? ret_from_fork+0x1b/0x270
[ 135.685294][ T12] ? __lock_release+0x5d/0x170
[ 135.685300][ T12] ? rcu_is_watching+0x12/0xb0
[ 135.685303][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 135.685306][ T12] ret_from_fork+0x1db/0x270
[ 135.685309][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 135.685312][ T12] ret_from_fork_asm+0x11/0x20
[ 135.685320][ T12]
[ 135.685321][ T12]
[ 135.691210][ T12] Allocated by task 251:
[ 135.691416][ T12] kasan_save_stack+0x24/0x40
[ 135.691578][ T12] kasan_save_track+0x14/0x30
[ 135.691732][ T12] __kasan_kmalloc+0x7b/0x90
[ 135.691885][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 135.692049][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 135.692206][ T12] sit_init_net+0x169/0x550
[ 135.692400][ T12] ops_init+0x189/0x550
[ 135.692522][ T12] setup_net+0xf1/0x380
[ 135.692642][ T12] copy_net_ns+0x21a/0x380
[ 135.692797][ T12] create_new_namespaces+0x35f/0x900
[ 135.692957][ T12] unshare_nsproxy_namespaces+0x89/0x120
[ 135.693119][ T12] ksys_unshare+0x2a3/0x660
[ 135.693275][ T12] __x64_sys_unshare+0x31/0x40
[ 135.693438][ T12] do_syscall_64+0xc1/0xfd0
[ 135.693598][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 135.693803][ T12]
[ 135.693887][ T12] Freed by task 12:
[ 135.694002][ T12] kasan_save_stack+0x24/0x40
[ 135.694162][ T12] kasan_save_track+0x14/0x30
[ 135.694320][ T12] __kasan_save_free_info+0x3b/0x60
[ 135.694485][ T12] __kasan_slab_free+0x3f/0x60
[ 135.694640][ T12] kfree+0x21d/0x540
[ 135.694756][ T12] device_release+0x9c/0x210
[ 135.694913][ T12] kobject_cleanup+0xfe/0x360
[ 135.695072][ T12] netdev_run_todo+0x81f/0xc60
[ 135.695227][ T12] ops_undo_list+0x714/0x890
[ 135.695382][ T12] cleanup_net+0x3b2/0x830
[ 135.695541][ T12] process_one_work+0xe35/0x1650
[ 135.695694][ T12] worker_thread+0x591/0xcf0
[ 135.695939][ T12] kthread+0x37b/0x5f0
[ 135.696056][ T12] ret_from_fork+0x1db/0x270
[ 135.696214][ T12] ret_from_fork_asm+0x11/0x20
[ 135.696372][ T12]
[ 135.696456][ T12] The buggy address belongs to the object at ffff88800904c000
[ 135.696456][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 135.696910][ T12] The buggy address is located 1708 bytes inside of
[ 135.696910][ T12] freed 4096-byte region [ffff88800904c000, ffff88800904d000)
[ 135.697375][ T12]
[ 135.697456][ T12] The buggy address belongs to the physical page:
[ 135.697644][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9048
[ 135.697917][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 135.698158][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 135.698362][ T12] page_type: f5(slab)
[ 135.698492][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000236810 ffffea0000168c10
[ 135.698874][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 135.699153][ T12] head: 0080000000000040 ffff888001043700 ffffea0000236810 ffffea0000168c10
[ 135.699531][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 135.699813][ T12] head: 0080000000000003 ffffea0000241201 00000000ffffffff 00000000ffffffff
[ 135.700201][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 135.700472][ T12] page dumped because: kasan: bad access detected
[ 135.700665][ T12]
[ 135.700740][ T12] Memory state around the buggy address:
[ 135.700976][ T12] ffff88800904c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 135.701197][ T12] ffff88800904c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 135.701419][ T12] >ffff88800904c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 135.701728][ T12] ^
[ 135.701883][ T12] ffff88800904c700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 135.702103][ T12] ffff88800904c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 135.702407][ T12] ==================================================================
[ 135.702965][ T12] Disabling lock debugging due to kernel taint
[ 135.703182][ T12] ------------[ cut here ]------------
[ 135.703327][ T12] refcount_t: underflow; use-after-free.
[ 135.703509][ T12] WARNING: CPU: 3 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 135.703787][ T12] Modules linked in: dummy veth nf_log_syslog nft_log nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nf_tables
[ 135.704642][ T12] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 135.705016][ T12] Tainted: [B]=BAD_PAGE
[ 135.705134][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 135.705326][ T12] Workqueue: netns cleanup_net
[ 135.705488][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 135.705691][ T12] Code: 83 90 02 80 fb 01 0f 87 95 6b d6 fe 83 e3 01 0f 85 51 ff ff ff c6 05 b1 83 90 02 01 90 48 c7 c7 a0 de 85 9a e8 c2 8b 15 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 f0 34 a1 ff e9 ba fe ff ff
[ 135.706249][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 135.706441][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 135.706667][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 135.706894][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff363e220
[ 135.707133][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 135.707356][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 135.707579][ T12] FS: 0000000000000000(0000) GS:ffff888099d6c000(0000) knlGS:0000000000000000
[ 135.707843][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 135.708054][ T12] CR2: 00007fdf22cf3000 CR3: 0000000028f35003 CR4: 0000000000772ef0
[ 135.708280][ T12] PKRU: 55555554
[ 135.708482][ T12] Call Trace:
[ 135.708593][ T12]
[ 135.708671][ T12] netdev_run_todo+0x5f0/0xc60
[ 135.708827][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 135.709094][ T12] ? generic_xdp_install+0x410/0x410
[ 135.709251][ T12] ops_undo_list+0x714/0x890
[ 135.709403][ T12] ? netns_get+0x110/0x110
[ 135.709552][ T12] ? cleanup_net+0x2d6/0x830
[ 135.709703][ T12] cleanup_net+0x3b2/0x830
[ 135.709937][ T12] ? net_passive_dec+0x190/0x190
[ 135.710110][ T12] ? rcu_is_watching+0x12/0xb0
[ 135.710267][ T12] process_one_work+0xe35/0x1650
[ 135.710421][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 135.710686][ T12] ? assign_work+0x168/0x240
[ 135.710836][ T12] worker_thread+0x591/0xcf0
[ 135.710994][ T12] ? rescuer_thread+0xd10/0xd10
[ 135.711157][ T12] kthread+0x37b/0x5f0
[ 135.711364][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 135.711525][ T12] ? ret_from_fork+0x1b/0x270
[ 135.711678][ T12] ? __lock_release+0x5d/0x170
[ 135.711830][ T12] ? rcu_is_watching+0x12/0xb0
[ 135.712087][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 135.712238][ T12] ret_from_fork+0x1db/0x270
[ 135.712395][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 135.712546][ T12] ret_from_fork_asm+0x11/0x20
[ 135.712786][ T12]
[ 135.712925][ T12] irq event stamp: 9553
[ 135.713045][ T12] hardirqs last enabled at (9553): [] finish_task_switch.isra.0+0x245/0x960
[ 135.713475][ T12] hardirqs last disabled at (9552): [] __schedule+0x94a/0x1b10
[ 135.713751][ T12] softirqs last enabled at (9412): [] handle_softirqs+0x352/0x610
[ 135.714036][ T12] softirqs last disabled at (9407): [] irq_exit_rcu+0xab/0x100
[ 135.714400][ T12] ---[ end trace 0000000000000000 ]---