[ 14.088943][ T69] ==================================================================
[ 14.089320][ T69] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 14.089634][ T69] Read of size 1 at addr ffff8880087e1694 by task kworker/u16:1/69
[ 14.089927][ T69]
[ 14.090023][ T69] CPU: 3 UID: 0 PID: 69 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 14.090029][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 14.090033][ T69] Workqueue: netns cleanup_net
[ 14.090041][ T69] Call Trace:
[ 14.090043][ T69]
[ 14.090046][ T69] dump_stack_lvl+0x82/0xc0
[ 14.090053][ T69] print_address_description.constprop.0+0x2c/0x3a0
[ 14.090062][ T69] ? kobject_put+0xbb/0xd0
[ 14.090066][ T69] print_report+0xb4/0x270
[ 14.090070][ T69] ? kobject_put+0xbb/0xd0
[ 14.090072][ T69] ? kasan_addr_to_slab+0x21/0x70
[ 14.090077][ T69] ? kobject_put+0xbb/0xd0
[ 14.090079][ T69] kasan_report+0xca/0x100
[ 14.090084][ T69] ? kobject_put+0xbb/0xd0
[ 14.090089][ T69] kobject_put+0xbb/0xd0
[ 14.090092][ T69] netdev_run_todo+0x5f0/0xc60
[ 14.090099][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 14.090103][ T69] ? generic_xdp_install+0x410/0x410
[ 14.090110][ T69] ops_undo_list+0x714/0x890
[ 14.090114][ T69] ? netns_get+0x110/0x110
[ 14.090116][ T69] ? cleanup_net+0x2d6/0x830
[ 14.090121][ T69] cleanup_net+0x3b2/0x830
[ 14.090124][ T69] ? net_passive_dec+0x190/0x190
[ 14.090128][ T69] ? rcu_is_watching+0x12/0xb0
[ 14.090134][ T69] process_one_work+0xe35/0x1650
[ 14.090142][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 14.090147][ T69] ? assign_work+0x168/0x240
[ 14.090151][ T69] worker_thread+0x591/0xcf0
[ 14.090156][ T69] ? rescuer_thread+0xd10/0xd10
[ 14.090159][ T69] kthread+0x37b/0x5f0
[ 14.090163][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.090165][ T69] ? ret_from_fork+0x1b/0x270
[ 14.090171][ T69] ? __lock_release+0x5d/0x170
[ 14.090177][ T69] ? rcu_is_watching+0x12/0xb0
[ 14.090180][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.090183][ T69] ret_from_fork+0x1db/0x270
[ 14.090186][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.090189][ T69] ret_from_fork_asm+0x11/0x20
[ 14.090197][ T69]
[ 14.090198][ T69]
[ 14.097483][ T69] Allocated by task 229:
[ 14.097630][ T69] kasan_save_stack+0x24/0x40
[ 14.097847][ T69] kasan_save_track+0x14/0x30
[ 14.098050][ T69] __kasan_kmalloc+0x7b/0x90
[ 14.098239][ T69] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 14.098429][ T69] alloc_netdev_mqs+0x7d/0x1310
[ 14.098624][ T69] sit_init_net+0x169/0x550
[ 14.098849][ T69] ops_init+0x189/0x550
[ 14.099001][ T69] setup_net+0xf1/0x380
[ 14.099151][ T69] copy_net_ns+0x21a/0x380
[ 14.099339][ T69] create_new_namespaces+0x35f/0x900
[ 14.099528][ T69] unshare_nsproxy_namespaces+0x89/0x120
[ 14.099729][ T69] ksys_unshare+0x2a3/0x660
[ 14.099928][ T69] __x64_sys_unshare+0x31/0x40
[ 14.100122][ T69] do_syscall_64+0xc1/0xfd0
[ 14.100311][ T69] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 14.100545][ T69]
[ 14.100656][ T69] Freed by task 69:
[ 14.100809][ T69] kasan_save_stack+0x24/0x40
[ 14.101013][ T69] kasan_save_track+0x14/0x30
[ 14.101218][ T69] __kasan_save_free_info+0x3b/0x60
[ 14.101403][ T69] __kasan_slab_free+0x3f/0x60
[ 14.101589][ T69] kfree+0x21d/0x540
[ 14.101748][ T69] device_release+0x9c/0x210
[ 14.102048][ T69] kobject_cleanup+0xfe/0x360
[ 14.102238][ T69] netdev_run_todo+0x81f/0xc60
[ 14.102423][ T69] ops_undo_list+0x714/0x890
[ 14.102615][ T69] cleanup_net+0x3b2/0x830
[ 14.102820][ T69] process_one_work+0xe35/0x1650
[ 14.103010][ T69] worker_thread+0x591/0xcf0
[ 14.103192][ T69] kthread+0x37b/0x5f0
[ 14.103330][ T69] ret_from_fork+0x1db/0x270
[ 14.103515][ T69] ret_from_fork_asm+0x11/0x20
[ 14.103815][ T69]
[ 14.103923][ T69] The buggy address belongs to the object at ffff8880087e1000
[ 14.103923][ T69] which belongs to the cache kmalloc-4k of size 4096
[ 14.104418][ T69] The buggy address is located 1684 bytes inside of
[ 14.104418][ T69] freed 4096-byte region [ffff8880087e1000, ffff8880087e2000)
[ 14.104969][ T69]
[ 14.105089][ T69] The buggy address belongs to the physical page:
[ 14.105315][ T69] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x87e0
[ 14.105782][ T69] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 14.106091][ T69] flags: 0x80000000000040(head|node=0|zone=1)
[ 14.106461][ T69] page_type: f5(slab)
[ 14.106633][ T69] raw: 0080000000000040 ffff888001043700 ffffea0000215e10 ffffea000021fc10
[ 14.106955][ T69] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 14.107356][ T69] head: 0080000000000040 ffff888001043700 ffffea0000215e10 ffffea000021fc10
[ 14.107686][ T69] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 14.108103][ T69] head: 0080000000000003 ffffea000021f801 00000000ffffffff 00000000ffffffff
[ 14.108404][ T69] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 14.108788][ T69] page dumped because: kasan: bad access detected
[ 14.109143][ T69]
[ 14.109230][ T69] Memory state around the buggy address:
[ 14.109411][ T69] ffff8880087e1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.109761][ T69] ffff8880087e1600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.110035][ T69] >ffff8880087e1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.110294][ T69] ^
[ 14.110560][ T69] ffff8880087e1700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.110841][ T69] ffff8880087e1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.111197][ T69] ==================================================================
[ 14.111570][ T69] Disabling lock debugging due to kernel taint
[ 14.111816][ T69] ------------[ cut here ]------------
[ 14.111990][ T69] refcount_t: underflow; use-after-free.
[ 14.112202][ T69] WARNING: CPU: 3 PID: 69 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 14.112757][ T69] Modules linked in: veth
[ 14.112917][ T69] CPU: 3 UID: 0 PID: 69 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 14.113394][ T69] Tainted: [B]=BAD_PAGE
[ 14.113570][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 14.113814][ T69] Workqueue: netns cleanup_net
[ 14.114017][ T69] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 14.114263][ T69] Code: 48 92 02 80 fb 01 0f 87 cb 7d d9 fe 83 e3 01 0f 85 51 ff ff ff c6 05 75 48 92 02 01 90 48 c7 c7 a0 8d a5 85 e8 42 93 18 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 c0 37 a1 ff e9 ba fe ff ff
[ 14.115191][ T69] RSP: 0018:ffffc900004a7a08 EFLAGS: 00010282
[ 14.115521][ T69] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 14.115784][ T69] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 14.116034][ T69] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff0c7e134
[ 14.116298][ T69] R10: 0000000000000003 R11: ffffc900004a7580 R12: 0000000000000001
[ 14.116547][ T69] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 14.116808][ T69] FS: 0000000000000000(0000) GS:ffff8880a8f90000(0000) knlGS:0000000000000000
[ 14.117187][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 14.117415][ T69] CR2: 00007f99527d6f60 CR3: 000000000c695004 CR4: 0000000000772ef0
[ 14.117790][ T69] PKRU: 55555554
[ 14.117917][ T69] Call Trace:
[ 14.118048][ T69]
[ 14.118140][ T69] netdev_run_todo+0x5f0/0xc60
[ 14.118333][ T69] ? dev_ingress_queue_create+0x190/0x190
[ 14.118590][ T69] ? generic_xdp_install+0x410/0x410
[ 14.118782][ T69] ops_undo_list+0x714/0x890
[ 14.118967][ T69] ? netns_get+0x110/0x110
[ 14.119145][ T69] ? cleanup_net+0x2d6/0x830
[ 14.119326][ T69] cleanup_net+0x3b2/0x830
[ 14.119537][ T69] ? net_passive_dec+0x190/0x190
[ 14.119728][ T69] ? rcu_is_watching+0x12/0xb0
[ 14.119931][ T69] process_one_work+0xe35/0x1650
[ 14.120214][ T69] ? pwq_dec_nr_in_flight+0x550/0x550
[ 14.120415][ T69] ? assign_work+0x168/0x240
[ 14.120610][ T69] worker_thread+0x591/0xcf0
[ 14.120802][ T69] ? rescuer_thread+0xd10/0xd10
[ 14.121070][ T69] kthread+0x37b/0x5f0
[ 14.121219][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.121392][ T69] ? ret_from_fork+0x1b/0x270
[ 14.121576][ T69] ? __lock_release+0x5d/0x170
[ 14.121843][ T69] ? rcu_is_watching+0x12/0xb0
[ 14.122010][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.122184][ T69] ret_from_fork+0x1db/0x270
[ 14.122361][ T69] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.122615][ T69] ret_from_fork_asm+0x11/0x20
[ 14.122799][ T69]
[ 14.122928][ T69] irq event stamp: 2595
[ 14.123069][ T69] hardirqs last enabled at (2595): [] irqentry_exit+0x3b/0x80
[ 14.123429][ T69] hardirqs last disabled at (2594): [] handle_softirqs+0x47f/0x610
[ 14.123753][ T69] softirqs last enabled at (2358): [] handle_softirqs+0x352/0x610
[ 14.124059][ T69] softirqs last disabled at (2353): [] irq_exit_rcu+0xab/0x100
[ 14.124468][ T69] ---[ end trace 0000000000000000 ]---
[ 14.597386][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 15.629057][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 15.630082][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 16.652507][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 16.654729][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 17.676431][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 17.677787][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 18.700434][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 18.701847][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 19.724413][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 19.725741][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 20.747505][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK