[ 58.854051][ T44] audit: type=1305 audit(1762521144.370:64): op=set audit_enabled=0 old=1 auid=4294967295 ses=4294967295 res=1
[ 59.005655][ T71] ==================================================================
[ 59.006104][ T71] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 59.006494][ T71] Read of size 1 at addr ffff888005dd46ac by task kworker/u16:1/71
[ 59.006863][ T71]
[ 59.006995][ T71] CPU: 2 UID: 0 PID: 71 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 59.007008][ T71] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 59.007015][ T71] Workqueue: netns cleanup_net
[ 59.007028][ T71] Call Trace:
[ 59.007033][ T71]
[ 59.007039][ T71] dump_stack_lvl+0x82/0xc0
[ 59.007056][ T71] print_address_description.constprop.0+0x2c/0x3a0
[ 59.007066][ T71] ? kobject_put+0xbb/0xd0
[ 59.007072][ T71] print_report+0xb4/0x270
[ 59.007077][ T71] ? kobject_put+0xbb/0xd0
[ 59.007081][ T71] ? kasan_addr_to_slab+0x21/0x70
[ 59.007087][ T71] ? kobject_put+0xbb/0xd0
[ 59.007091][ T71] kasan_report+0xca/0x100
[ 59.007098][ T71] ? kobject_put+0xbb/0xd0
[ 59.007106][ T71] kobject_put+0xbb/0xd0
[ 59.007111][ T71] netdev_run_todo+0x5f0/0xc60
[ 59.007119][ T71] ? dev_ingress_queue_create+0x190/0x190
[ 59.007124][ T71] ? generic_xdp_install+0x410/0x410
[ 59.007135][ T71] ops_undo_list+0x714/0x890
[ 59.007145][ T71] ? netns_get+0x110/0x110
[ 59.007150][ T71] ? cleanup_net+0x2d6/0x830
[ 59.007158][ T71] cleanup_net+0x3b2/0x830
[ 59.007163][ T71] ? net_passive_dec+0x190/0x190
[ 59.007169][ T71] ? rcu_is_watching+0x12/0xb0
[ 59.007179][ T71] process_one_work+0xe35/0x1650
[ 59.007192][ T71] ? pwq_dec_nr_in_flight+0x550/0x550
[ 59.007201][ T71] ? assign_work+0x168/0x240
[ 59.007207][ T71] worker_thread+0x591/0xcf0
[ 59.007216][ T71] ? rescuer_thread+0xd10/0xd10
[ 59.007221][ T71] kthread+0x37b/0x5f0
[ 59.007228][ T71] ? kthread_is_per_cpu+0xc0/0xc0
[ 59.007231][ T71] ? ret_from_fork+0x1b/0x270
[ 59.007240][ T71] ? __lock_release+0x5d/0x170
[ 59.007248][ T71] ? rcu_is_watching+0x12/0xb0
[ 59.007253][ T71] ? kthread_is_per_cpu+0xc0/0xc0
[ 59.007258][ T71] ret_from_fork+0x1db/0x270
[ 59.007262][ T71] ? kthread_is_per_cpu+0xc0/0xc0
[ 59.007266][ T71] ret_from_fork_asm+0x11/0x20
[ 59.007281][ T71]
[ 59.007283][ T71]
[ 59.016466][ T71] Allocated by task 245:
[ 59.016644][ T71] kasan_save_stack+0x24/0x40
[ 59.016895][ T71] kasan_save_track+0x14/0x30
[ 59.017142][ T71] __kasan_kmalloc+0x7b/0x90
[ 59.017405][ T71] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 59.017657][ T71] alloc_netdev_mqs+0x7d/0x1370
[ 59.017897][ T71] sit_init_net+0x169/0x550
[ 59.018138][ T71] ops_init+0x189/0x550
[ 59.018473][ T71] setup_net+0xf1/0x380
[ 59.018793][ T71] copy_net_ns+0x21a/0x380
[ 59.019035][ T71] create_new_namespaces+0x35f/0x900
[ 59.019270][ T71] unshare_nsproxy_namespaces+0x89/0x120
[ 59.019513][ T71] ksys_unshare+0x2a3/0x660
[ 59.019754][ T71] __x64_sys_unshare+0x31/0x40
[ 59.019996][ T71] do_syscall_64+0xc1/0xfd0
[ 59.020377][ T71] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 59.020669][ T71]
[ 59.020804][ T71] Freed by task 71:
[ 59.021000][ T71] kasan_save_stack+0x24/0x40
[ 59.021386][ T71] kasan_save_track+0x14/0x30
[ 59.021621][ T71] __kasan_save_free_info+0x3b/0x60
[ 59.021876][ T71] __kasan_slab_free+0x3f/0x60
[ 59.022109][ T71] kfree+0x21d/0x540
[ 59.022285][ T71] device_release+0x9c/0x210
[ 59.022541][ T71] kobject_cleanup+0xfe/0x360
[ 59.022792][ T71] netdev_run_todo+0x81f/0xc60
[ 59.023033][ T71] ops_undo_list+0x714/0x890
[ 59.023270][ T71] cleanup_net+0x3b2/0x830
[ 59.023507][ T71] process_one_work+0xe35/0x1650
[ 59.023742][ T71] worker_thread+0x591/0xcf0
[ 59.023980][ T71] kthread+0x37b/0x5f0
[ 59.024156][ T71] ret_from_fork+0x1db/0x270
[ 59.024391][ T71] ret_from_fork_asm+0x11/0x20
[ 59.024644][ T71]
[ 59.024778][ T71] The buggy address belongs to the object at ffff888005dd4000
[ 59.024778][ T71] which belongs to the cache kmalloc-4k of size 4096
[ 59.025371][ T71] The buggy address is located 1708 bytes inside of
[ 59.025371][ T71] freed 4096-byte region [ffff888005dd4000, ffff888005dd5000)
[ 59.025984][ T71]
[ 59.026106][ T71] The buggy address belongs to the physical page:
[ 59.026401][ T71] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5dd0
[ 59.026838][ T71] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 59.027205][ T71] flags: 0x80000000000040(head|node=0|zone=1)
[ 59.027523][ T71] page_type: f5(slab)
[ 59.027715][ T71] raw: 0080000000000040 ffff888001043700 ffffea0000180a10 ffffea000025be10
[ 59.028149][ T71] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 59.028581][ T71] head: 0080000000000040 ffff888001043700 ffffea0000180a10 ffffea000025be10
[ 59.029016][ T71] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 59.029447][ T71] head: 0080000000000003 ffffea0000177401 00000000ffffffff 00000000ffffffff
[ 59.029878][ T71] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 59.030471][ T71] page dumped because: kasan: bad access detected
[ 59.030754][ T71]
[ 59.030874][ T71] Memory state around the buggy address:
[ 59.031098][ T71] ffff888005dd4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 59.031565][ T71] ffff888005dd4600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 59.031911][ T71] >ffff888005dd4680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 59.032388][ T71] ^
[ 59.032612][ T71] ffff888005dd4700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 59.032944][ T71] ffff888005dd4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 59.033407][ T71] ==================================================================
[ 59.035908][ T71] Disabling lock debugging due to kernel taint
[ 59.036275][ T71] ------------[ cut here ]------------
[ 59.036517][ T71] refcount_t: underflow; use-after-free.
[ 59.036802][ T71] WARNING: CPU: 2 PID: 71 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 59.037239][ T71] Modules linked in: nft_quota nf_tables
[ 59.038300][ T71] CPU: 2 UID: 0 PID: 71 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 59.038953][ T71] Tainted: [B]=BAD_PAGE
[ 59.039245][ T71] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 59.039667][ T71] Workqueue: netns cleanup_net
[ 59.040056][ T71] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 59.040488][ T71] 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 65 ad 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
[ 59.041609][ T71] RSP: 0018:ffffc900004c7a08 EFLAGS: 00010282
[ 59.042016][ T71] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 59.042494][ T71] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 59.042956][ T71] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff5bfe220
[ 59.043417][ T71] R10: 0000000000000003 R11: ffffc900004c7580 R12: 0000000000000001
[ 59.043872][ T71] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 59.044334][ T71] FS: 0000000000000000(0000) GS:ffff888086eec000(0000) knlGS:0000000000000000
[ 59.044852][ T71] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 59.045347][ T71] CR2: 00007f1523153810 CR3: 000000000fb35005 CR4: 0000000000772ef0
[ 59.045844][ T71] PKRU: 55555554
[ 59.046149][ T71] Call Trace:
[ 59.046445][ T71]
[ 59.046678][ T71] netdev_run_todo+0x5f0/0xc60
[ 59.047131][ T71] ? dev_ingress_queue_create+0x190/0x190
[ 59.047496][ T71] ? generic_xdp_install+0x410/0x410
[ 59.047845][ T71] ops_undo_list+0x714/0x890
[ 59.048186][ T71] ? netns_get+0x110/0x110
[ 59.048539][ T71] ? cleanup_net+0x2d6/0x830
[ 59.048877][ T71] cleanup_net+0x3b2/0x830
[ 59.049249][ T71] ? net_passive_dec+0x190/0x190
[ 59.049600][ T71] ? rcu_is_watching+0x12/0xb0
[ 59.050034][ T71] process_one_work+0xe35/0x1650
[ 59.050380][ T71] ? pwq_dec_nr_in_flight+0x550/0x550
[ 59.050650][ T71] ? assign_work+0x168/0x240
[ 59.050905][ T71] worker_thread+0x591/0xcf0
[ 59.051182][ T71] ? rescuer_thread+0xd10/0xd10
[ 59.051479][ T71] kthread+0x37b/0x5f0
[ 59.051688][ T71] ? kthread_is_per_cpu+0xc0/0xc0
[ 59.051936][ T71] ? ret_from_fork+0x1b/0x270
[ 59.052202][ T71] ? __lock_release+0x5d/0x170
[ 59.052497][ T71] ? rcu_is_watching+0x12/0xb0
[ 59.052744][ T71] ? kthread_is_per_cpu+0xc0/0xc0
[ 59.053121][ T71] ret_from_fork+0x1db/0x270
[ 59.053345][ T71] ? kthread_is_per_cpu+0xc0/0xc0
[ 59.053674][ T71] ret_from_fork_asm+0x11/0x20
[ 59.053879][ T71]
[ 59.054131][ T71] irq event stamp: 9987
[ 59.054341][ T71] hardirqs last enabled at (9987): [] finish_task_switch.isra.0+0x245/0x960
[ 59.054747][ T71] hardirqs last disabled at (9986): [] __schedule+0x94a/0x1b10
[ 59.055097][ T71] softirqs last enabled at (9814): [] handle_softirqs+0x352/0x610
[ 59.055456][ T71] softirqs last disabled at (9807): [] irq_exit_rcu+0xab/0x100
[ 59.055799][ T71] ---[ end trace 0000000000000000 ]---