[ 14.874581][ T12] ==================================================================
[ 14.875026][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 14.875399][ T12] Read of size 1 at addr ffff88800508c694 by task kworker/u16:0/12
[ 14.875739][ T12]
[ 14.875860][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 14.875875][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 14.875882][ T12] Workqueue: netns cleanup_net
[ 14.875898][ T12] Call Trace:
[ 14.875905][ T12]
[ 14.875909][ T12] dump_stack_lvl+0x82/0xc0
[ 14.875922][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 14.875938][ T12] ? kobject_put+0xbb/0xd0
[ 14.875943][ T12] print_report+0xb4/0x270
[ 14.875948][ T12] ? kobject_put+0xbb/0xd0
[ 14.875952][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 14.875957][ T12] ? kobject_put+0xbb/0xd0
[ 14.875961][ T12] kasan_report+0xca/0x100
[ 14.875968][ T12] ? kobject_put+0xbb/0xd0
[ 14.875975][ T12] kobject_put+0xbb/0xd0
[ 14.875981][ T12] netdev_run_todo+0x5f0/0xc60
[ 14.875990][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 14.875997][ T12] ? generic_xdp_install+0x410/0x410
[ 14.876008][ T12] ops_undo_list+0x714/0x890
[ 14.876015][ T12] ? netns_get+0x110/0x110
[ 14.876019][ T12] ? cleanup_net+0x2d6/0x830
[ 14.876032][ T12] cleanup_net+0x3b2/0x830
[ 14.876038][ T12] ? net_passive_dec+0x190/0x190
[ 14.876043][ T12] ? rcu_is_watching+0x12/0xb0
[ 14.876053][ T12] process_one_work+0xe35/0x1650
[ 14.876068][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 14.876077][ T12] ? assign_work+0x168/0x240
[ 14.876083][ T12] worker_thread+0x591/0xcf0
[ 14.876091][ T12] ? rescuer_thread+0xd10/0xd10
[ 14.876096][ T12] kthread+0x37b/0x5f0
[ 14.876103][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.876106][ T12] ? ret_from_fork+0x1b/0x270
[ 14.876121][ T12] ? __lock_release+0x5d/0x170
[ 14.876132][ T12] ? rcu_is_watching+0x12/0xb0
[ 14.876137][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.876143][ T12] ret_from_fork+0x1db/0x270
[ 14.876147][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.876151][ T12] ret_from_fork_asm+0x11/0x20
[ 14.876166][ T12]
[ 14.876168][ T12]
[ 14.885774][ T12] Allocated by task 227:
[ 14.886017][ T12] kasan_save_stack+0x24/0x40
[ 14.886323][ T12] kasan_save_track+0x14/0x30
[ 14.886590][ T12] __kasan_kmalloc+0x7b/0x90
[ 14.886858][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 14.887161][ T12] alloc_netdev_mqs+0x7d/0x1310
[ 14.887375][ T12] sit_init_net+0x169/0x550
[ 14.887544][ T12] ops_init+0x189/0x550
[ 14.887678][ T12] setup_net+0xf1/0x380
[ 14.887803][ T12] copy_net_ns+0x21a/0x380
[ 14.887979][ T12] create_new_namespaces+0x35f/0x900
[ 14.888151][ T12] unshare_nsproxy_namespaces+0x89/0x120
[ 14.888311][ T12] ksys_unshare+0x2a3/0x660
[ 14.888516][ T12] __x64_sys_unshare+0x31/0x40
[ 14.888693][ T12] do_syscall_64+0xc1/0xfd0
[ 14.888889][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 14.889237][ T12]
[ 14.889377][ T12] Freed by task 12:
[ 14.889574][ T12] kasan_save_stack+0x24/0x40
[ 14.889849][ T12] kasan_save_track+0x14/0x30
[ 14.890122][ T12] __kasan_save_free_info+0x3b/0x60
[ 14.890385][ T12] __kasan_slab_free+0x3f/0x60
[ 14.890601][ T12] kfree+0x21d/0x540
[ 14.890724][ T12] device_release+0x9c/0x210
[ 14.890904][ T12] kobject_cleanup+0xfe/0x360
[ 14.891076][ T12] netdev_run_todo+0x81f/0xc60
[ 14.891240][ T12] ops_undo_list+0x714/0x890
[ 14.891406][ T12] cleanup_net+0x3b2/0x830
[ 14.891569][ T12] process_one_work+0xe35/0x1650
[ 14.891729][ T12] worker_thread+0x591/0xcf0
[ 14.891894][ T12] kthread+0x37b/0x5f0
[ 14.892026][ T12] ret_from_fork+0x1db/0x270
[ 14.892188][ T12] ret_from_fork_asm+0x11/0x20
[ 14.892353][ T12]
[ 14.892438][ T12] The buggy address belongs to the object at ffff88800508c000
[ 14.892438][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 14.892841][ T12] The buggy address is located 1684 bytes inside of
[ 14.892841][ T12] freed 4096-byte region [ffff88800508c000, ffff88800508d000)
[ 14.893231][ T12]
[ 14.893317][ T12] The buggy address belongs to the physical page:
[ 14.893514][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5088
[ 14.893808][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 14.894061][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 14.894272][ T12] page_type: f5(slab)
[ 14.894405][ T12] raw: 0080000000000040 ffff888001043700 ffffea000027fc10 ffffea000014a610
[ 14.894692][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 14.895000][ T12] head: 0080000000000040 ffff888001043700 ffffea000027fc10 ffffea000014a610
[ 14.895285][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 14.895574][ T12] head: 0080000000000003 ffffea0000142201 00000000ffffffff 00000000ffffffff
[ 14.895869][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 14.896162][ T12] page dumped because: kasan: bad access detected
[ 14.896370][ T12]
[ 14.896451][ T12] Memory state around the buggy address:
[ 14.896605][ T12] ffff88800508c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.896847][ T12] ffff88800508c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.897083][ T12] >ffff88800508c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.897328][ T12] ^
[ 14.897490][ T12] ffff88800508c700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.897715][ T12] ffff88800508c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.897962][ T12] ==================================================================
[ 14.898363][ T12] Disabling lock debugging due to kernel taint
[ 14.898571][ T12] ------------[ cut here ]------------
[ 14.898732][ T12] refcount_t: underflow; use-after-free.
[ 14.898925][ T12] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 14.899238][ T12] Modules linked in: veth
[ 14.899385][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 14.899743][ T12] Tainted: [B]=BAD_PAGE
[ 14.899877][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 14.900604][ T12] Workqueue: netns cleanup_net
[ 14.900781][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 14.901017][ 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 05 ae 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
[ 14.901582][ T12] RSP: 0000:ffffc900000c7a08 EFLAGS: 00010282
[ 14.901786][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 14.902047][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 14.902289][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff5d3e134
[ 14.902539][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 14.902768][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 14.903031][ T12] FS: 0000000000000000(0000) GS:ffff888086410000(0000) knlGS:0000000000000000
[ 14.903314][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 14.903532][ T12] CR2: 00007f3b61068010 CR3: 000000002c335002 CR4: 0000000000772ef0
[ 14.903770][ T12] PKRU: 55555554
[ 14.903901][ T12] Call Trace:
[ 14.904043][ T12]
[ 14.904126][ T12] netdev_run_todo+0x5f0/0xc60
[ 14.904301][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 14.904464][ T12] ? generic_xdp_install+0x410/0x410
[ 14.904628][ T12] ops_undo_list+0x714/0x890
[ 14.904785][ T12] ? netns_get+0x110/0x110
[ 14.904961][ T12] ? cleanup_net+0x2d6/0x830
[ 14.905123][ T12] cleanup_net+0x3b2/0x830
[ 14.905282][ T12] ? net_passive_dec+0x190/0x190
[ 14.905445][ T12] ? rcu_is_watching+0x12/0xb0
[ 14.905603][ T12] process_one_work+0xe35/0x1650
[ 14.905761][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 14.905935][ T12] ? assign_work+0x168/0x240
[ 14.906100][ T12] worker_thread+0x591/0xcf0
[ 14.906258][ T12] ? rescuer_thread+0xd10/0xd10
[ 14.906425][ T12] kthread+0x37b/0x5f0
[ 14.906543][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.906694][ T12] ? ret_from_fork+0x1b/0x270
[ 14.906893][ T12] ? __lock_release+0x5d/0x170
[ 14.907068][ T12] ? rcu_is_watching+0x12/0xb0
[ 14.907262][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.907448][ T12] ret_from_fork+0x1db/0x270
[ 14.907617][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.907785][ T12] ret_from_fork_asm+0x11/0x20
[ 14.907979][ T12]
[ 14.908108][ T12] irq event stamp: 2831
[ 14.908225][ T12] hardirqs last enabled at (2831): [] finish_task_switch.isra.0+0x245/0x960
[ 14.908560][ T12] hardirqs last disabled at (2830): [] __schedule+0x94a/0x1b10
[ 14.908885][ T12] softirqs last enabled at (2696): [] handle_softirqs+0x352/0x610
[ 14.909186][ T12] softirqs last disabled at (2689): [] irq_exit_rcu+0xab/0x100
[ 14.909470][ T12] ---[ end trace 0000000000000000 ]---
[ 15.294613][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 16.304603][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 16.305601][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 17.328133][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 17.329534][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 18.351197][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 18.353453][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 19.376157][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 19.377614][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 20.400170][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 20.401743][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 21.424160][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK
[ 22.353288][ T227] connect-deny_ip (227) used greatest stack depth: 24392 bytes left