[ 15.641567][ T12] ==================================================================
[ 15.642040][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 15.642477][ T12] Read of size 1 at addr ffff88800855c694 by task kworker/u16:0/12
[ 15.642897][ T12]
[ 15.643039][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 15.643047][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 15.643051][ T12] Workqueue: netns cleanup_net
[ 15.643061][ T12] Call Trace:
[ 15.643065][ T12]
[ 15.643068][ T12] dump_stack_lvl+0x82/0xc0
[ 15.643077][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 15.643089][ T12] ? kobject_put+0xbb/0xd0
[ 15.643095][ T12] print_report+0xb4/0x270
[ 15.643102][ T12] ? kobject_put+0xbb/0xd0
[ 15.643106][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 15.643113][ T12] ? kobject_put+0xbb/0xd0
[ 15.643117][ T12] kasan_report+0xca/0x100
[ 15.643124][ T12] ? kobject_put+0xbb/0xd0
[ 15.643133][ T12] kobject_put+0xbb/0xd0
[ 15.643139][ T12] netdev_run_todo+0x5f0/0xc60
[ 15.643147][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 15.643153][ T12] ? generic_xdp_install+0x410/0x410
[ 15.643166][ T12] ops_undo_list+0x714/0x890
[ 15.643175][ T12] ? netns_get+0x110/0x110
[ 15.643178][ T12] ? cleanup_net+0x2d6/0x830
[ 15.643188][ T12] cleanup_net+0x3b2/0x830
[ 15.643194][ T12] ? net_passive_dec+0x190/0x190
[ 15.643201][ T12] ? rcu_is_watching+0x12/0xb0
[ 15.643212][ T12] process_one_work+0xe35/0x1650
[ 15.643227][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 15.643237][ T12] ? assign_work+0x168/0x240
[ 15.643243][ T12] worker_thread+0x591/0xcf0
[ 15.643254][ T12] ? rescuer_thread+0xd10/0xd10
[ 15.643260][ T12] kthread+0x37b/0x5f0
[ 15.643266][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 15.643270][ T12] ? ret_from_fork+0x1b/0x270
[ 15.643277][ T12] ? __lock_release+0x5d/0x170
[ 15.643286][ T12] ? rcu_is_watching+0x12/0xb0
[ 15.643291][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 15.643298][ T12] ret_from_fork+0x1db/0x270
[ 15.643303][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 15.643308][ T12] ret_from_fork_asm+0x11/0x20
[ 15.643324][ T12]
[ 15.643326][ T12]
[ 15.654618][ T12] Allocated by task 227:
[ 15.654986][ T12] kasan_save_stack+0x24/0x40
[ 15.655290][ T12] kasan_save_track+0x14/0x30
[ 15.655560][ T12] __kasan_kmalloc+0x7b/0x90
[ 15.655827][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 15.656259][ T12] alloc_netdev_mqs+0x7d/0x1310
[ 15.656529][ T12] sit_init_net+0x169/0x550
[ 15.656809][ T12] ops_init+0x189/0x550
[ 15.657046][ T12] setup_net+0xf1/0x380
[ 15.657424][ T12] copy_net_ns+0x21a/0x380
[ 15.657849][ T12] create_new_namespaces+0x35f/0x900
[ 15.658129][ T12] unshare_nsproxy_namespaces+0x89/0x120
[ 15.658429][ T12] ksys_unshare+0x2a3/0x660
[ 15.658714][ T12] __x64_sys_unshare+0x31/0x40
[ 15.659185][ T12] do_syscall_64+0xc1/0xfd0
[ 15.659490][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 15.660006][ T12]
[ 15.660144][ T12] Freed by task 12:
[ 15.660514][ T12] kasan_save_stack+0x24/0x40
[ 15.660802][ T12] kasan_save_track+0x14/0x30
[ 15.661131][ T12] __kasan_save_free_info+0x3b/0x60
[ 15.661407][ T12] __kasan_slab_free+0x3f/0x60
[ 15.661684][ T12] kfree+0x21d/0x540
[ 15.661894][ T12] device_release+0x9c/0x210
[ 15.662181][ T12] kobject_cleanup+0xfe/0x360
[ 15.662457][ T12] netdev_run_todo+0x81f/0xc60
[ 15.662736][ T12] ops_undo_list+0x714/0x890
[ 15.663182][ T12] cleanup_net+0x3b2/0x830
[ 15.663474][ T12] process_one_work+0xe35/0x1650
[ 15.663908][ T12] worker_thread+0x591/0xcf0
[ 15.664166][ T12] kthread+0x37b/0x5f0
[ 15.664552][ T12] ret_from_fork+0x1db/0x270
[ 15.664822][ T12] ret_from_fork_asm+0x11/0x20
[ 15.665083][ T12]
[ 15.665252][ T12] The buggy address belongs to the object at ffff88800855c000
[ 15.665252][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 15.666107][ T12] The buggy address is located 1684 bytes inside of
[ 15.666107][ T12] freed 4096-byte region [ffff88800855c000, ffff88800855d000)
[ 15.666931][ T12]
[ 15.667074][ T12] The buggy address belongs to the physical page:
[ 15.667448][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8558
[ 15.667916][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 15.668311][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 15.668638][ T12] page_type: f5(slab)
[ 15.668850][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000224c10 ffffea0000224a10
[ 15.669358][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 15.669854][ T12] head: 0080000000000040 ffff888001043700 ffffea0000224c10 ffffea0000224a10
[ 15.670355][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 15.670836][ T12] head: 0080000000000003 ffffea0000215601 00000000ffffffff 00000000ffffffff
[ 15.671317][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 15.671812][ T12] page dumped because: kasan: bad access detected
[ 15.672156][ T12]
[ 15.672293][ T12] Memory state around the buggy address:
[ 15.672712][ T12] ffff88800855c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 15.673109][ T12] ffff88800855c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 15.673494][ T12] >ffff88800855c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 15.674041][ T12] ^
[ 15.674297][ T12] ffff88800855c700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 15.674699][ T12] ffff88800855c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 15.675301][ T12] ==================================================================
[ 15.675747][ T12] Disabling lock debugging due to kernel taint
[ 15.676087][ T12] ------------[ cut here ]------------
[ 15.676484][ T12] refcount_t: underflow; use-after-free.
[ 15.676786][ T12] WARNING: CPU: 1 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 15.677286][ T12] Modules linked in: veth
[ 15.677514][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 15.678256][ T12] Tainted: [B]=BAD_PAGE
[ 15.678484][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 15.678816][ T12] Workqueue: netns cleanup_net
[ 15.679098][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 15.679536][ T12] 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 85 8f 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
[ 15.680708][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 15.681030][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 15.681624][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 15.681979][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff203e134
[ 15.682325][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 15.682837][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 15.683193][ T12] FS: 0000000000000000(0000) GS:ffff8880a4c90000(0000) knlGS:0000000000000000
[ 15.683956][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 15.684277][ T12] CR2: 0000561ed03981d0 CR3: 000000000c272006 CR4: 0000000000772ef0
[ 15.684773][ T12] PKRU: 55555554
[ 15.684965][ T12] Call Trace:
[ 15.685153][ T12]
[ 15.685287][ T12] netdev_run_todo+0x5f0/0xc60
[ 15.685659][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 15.685926][ T12] ? generic_xdp_install+0x410/0x410
[ 15.686176][ T12] ops_undo_list+0x714/0x890
[ 15.686545][ T12] ? netns_get+0x110/0x110
[ 15.686790][ T12] ? cleanup_net+0x2d6/0x830
[ 15.687086][ T12] cleanup_net+0x3b2/0x830
[ 15.687340][ T12] ? net_passive_dec+0x190/0x190
[ 15.687706][ T12] ? rcu_is_watching+0x12/0xb0
[ 15.687971][ T12] process_one_work+0xe35/0x1650
[ 15.688230][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 15.688608][ T12] ? assign_work+0x168/0x240
[ 15.688862][ T12] worker_thread+0x591/0xcf0
[ 15.689155][ T12] ? rescuer_thread+0xd10/0xd10
[ 15.689573][ T12] kthread+0x37b/0x5f0
[ 15.689774][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 15.690061][ T12] ? ret_from_fork+0x1b/0x270
[ 15.690326][ T12] ? __lock_release+0x5d/0x170
[ 15.690703][ T12] ? rcu_is_watching+0x12/0xb0
[ 15.690967][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 15.691221][ T12] ret_from_fork+0x1db/0x270
[ 15.691584][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 15.691861][ T12] ret_from_fork_asm+0x11/0x20
[ 15.692120][ T12]
[ 15.692311][ T12] irq event stamp: 2695
[ 15.692629][ T12] hardirqs last enabled at (2695): [] finish_task_switch.isra.0+0x245/0x960
[ 15.693130][ T12] hardirqs last disabled at (2694): [] __schedule+0x94a/0x1b10
[ 15.693847][ T12] softirqs last enabled at (2084): [] handle_softirqs+0x352/0x610
[ 15.694302][ T12] softirqs last disabled at (2079): [] irq_exit_rcu+0xab/0x100
[ 15.694868][ T12] ---[ end trace 0000000000000000 ]---
[ 16.057951][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 17.064977][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 17.065947][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 18.088553][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 18.089950][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 19.112542][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 19.113941][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 20.135625][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 20.137972][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 21.159564][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 21.161066][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 22.183614][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 23.159985][ T227] connect-deny_ip (227) used greatest stack depth: 24688 bytes left