[ 14.601166][ T12] ==================================================================
[ 14.601493][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 14.601785][ T12] Read of size 1 at addr ffff888009154694 by task kworker/u16:0/12
[ 14.602015][ T12]
[ 14.602099][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 14.602106][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 14.602109][ T12] Workqueue: netns cleanup_net
[ 14.602118][ T12] Call Trace:
[ 14.602121][ T12]
[ 14.602125][ T12] dump_stack_lvl+0x82/0xc0
[ 14.602132][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 14.602141][ T12] ? kobject_put+0xbb/0xd0
[ 14.602145][ T12] print_report+0xb4/0x270
[ 14.602149][ T12] ? kobject_put+0xbb/0xd0
[ 14.602151][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 14.602155][ T12] ? kobject_put+0xbb/0xd0
[ 14.602158][ T12] kasan_report+0xca/0x100
[ 14.602162][ T12] ? kobject_put+0xbb/0xd0
[ 14.602167][ T12] kobject_put+0xbb/0xd0
[ 14.602171][ T12] netdev_run_todo+0x5f0/0xc60
[ 14.602177][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 14.602181][ T12] ? generic_xdp_install+0x410/0x410
[ 14.602187][ T12] ops_undo_list+0x714/0x890
[ 14.602191][ T12] ? netns_get+0x110/0x110
[ 14.602194][ T12] ? cleanup_net+0x2d6/0x830
[ 14.602199][ T12] cleanup_net+0x3b2/0x830
[ 14.602202][ T12] ? net_passive_dec+0x190/0x190
[ 14.602205][ T12] ? rcu_is_watching+0x12/0xb0
[ 14.602213][ T12] process_one_work+0xe35/0x1650
[ 14.602221][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 14.602226][ T12] ? assign_work+0x168/0x240
[ 14.602230][ T12] worker_thread+0x591/0xcf0
[ 14.602235][ T12] ? rescuer_thread+0xd10/0xd10
[ 14.602239][ T12] kthread+0x37b/0x5f0
[ 14.602242][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.602244][ T12] ? ret_from_fork+0x1b/0x270
[ 14.602251][ T12] ? __lock_release+0x5d/0x170
[ 14.602257][ T12] ? rcu_is_watching+0x12/0xb0
[ 14.602259][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.602262][ T12] ret_from_fork+0x1db/0x270
[ 14.602266][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.602268][ T12] ret_from_fork_asm+0x11/0x20
[ 14.602277][ T12]
[ 14.602278][ T12]
[ 14.609315][ T12] Allocated by task 228:
[ 14.609436][ T12] kasan_save_stack+0x24/0x40
[ 14.609692][ T12] kasan_save_track+0x14/0x30
[ 14.609866][ T12] __kasan_kmalloc+0x7b/0x90
[ 14.610027][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 14.610205][ T12] alloc_netdev_mqs+0x7d/0x1310
[ 14.610365][ T12] sit_init_net+0x169/0x550
[ 14.610525][ T12] ops_init+0x189/0x550
[ 14.610647][ T12] setup_net+0xf1/0x380
[ 14.610767][ T12] copy_net_ns+0x21a/0x380
[ 14.611027][ T12] create_new_namespaces+0x35f/0x900
[ 14.611245][ T12] unshare_nsproxy_namespaces+0x89/0x120
[ 14.611461][ T12] ksys_unshare+0x2a3/0x660
[ 14.611679][ T12] __x64_sys_unshare+0x31/0x40
[ 14.611917][ T12] do_syscall_64+0xc1/0xfd0
[ 14.612102][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 14.612369][ T12]
[ 14.612468][ T12] Freed by task 12:
[ 14.612602][ T12] kasan_save_stack+0x24/0x40
[ 14.612808][ T12] kasan_save_track+0x14/0x30
[ 14.613031][ T12] __kasan_save_free_info+0x3b/0x60
[ 14.613259][ T12] __kasan_slab_free+0x3f/0x60
[ 14.613431][ T12] kfree+0x21d/0x540
[ 14.613597][ T12] device_release+0x9c/0x210
[ 14.613788][ T12] kobject_cleanup+0xfe/0x360
[ 14.613950][ T12] netdev_run_todo+0x81f/0xc60
[ 14.614120][ T12] ops_undo_list+0x714/0x890
[ 14.614301][ T12] cleanup_net+0x3b2/0x830
[ 14.614548][ T12] process_one_work+0xe35/0x1650
[ 14.614769][ T12] worker_thread+0x591/0xcf0
[ 14.614945][ T12] kthread+0x37b/0x5f0
[ 14.615141][ T12] ret_from_fork+0x1db/0x270
[ 14.615341][ T12] ret_from_fork_asm+0x11/0x20
[ 14.615560][ T12]
[ 14.615656][ T12] The buggy address belongs to the object at ffff888009154000
[ 14.615656][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 14.616113][ T12] The buggy address is located 1684 bytes inside of
[ 14.616113][ T12] freed 4096-byte region [ffff888009154000, ffff888009155000)
[ 14.616520][ T12]
[ 14.616600][ T12] The buggy address belongs to the physical page:
[ 14.616791][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9150
[ 14.617089][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 14.617336][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 14.617549][ T12] page_type: f5(slab)
[ 14.617676][ T12] raw: 0080000000000040 ffff888001043700 ffffea00001fb810 ffffea000021d010
[ 14.617999][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 14.618291][ T12] head: 0080000000000040 ffff888001043700 ffffea00001fb810 ffffea000021d010
[ 14.618608][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 14.618916][ T12] head: 0080000000000003 ffffea0000245401 00000000ffffffff 00000000ffffffff
[ 14.619241][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 14.619598][ T12] page dumped because: kasan: bad access detected
[ 14.619857][ T12]
[ 14.619958][ T12] Memory state around the buggy address:
[ 14.620153][ T12] ffff888009154580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.620466][ T12] ffff888009154600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.620782][ T12] >ffff888009154680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.621094][ T12] ^
[ 14.621307][ T12] ffff888009154700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.621595][ T12] ffff888009154780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 14.621857][ T12] ==================================================================
[ 14.623357][ T12] Disabling lock debugging due to kernel taint
[ 14.623645][ T12] ------------[ cut here ]------------
[ 14.623829][ T12] refcount_t: underflow; use-after-free.
[ 14.624062][ T12] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 14.624368][ T12] Modules linked in: veth
[ 14.624522][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 14.624920][ T12] Tainted: [B]=BAD_PAGE
[ 14.625052][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 14.625272][ T12] Workqueue: netns cleanup_net
[ 14.625485][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 14.625739][ 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 65 95 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
[ 14.626402][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 14.627282][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 14.627616][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 14.627860][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff2bfe134
[ 14.628125][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 14.628385][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 14.628760][ T12] FS: 0000000000000000(0000) GS:ffff88809ee10000(0000) knlGS:0000000000000000
[ 14.629059][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 14.629304][ T12] CR2: 00007fec33fe3b40 CR3: 0000000004e0d002 CR4: 0000000000772ef0
[ 14.629667][ T12] PKRU: 55555554
[ 14.629792][ T12] Call Trace:
[ 14.629925][ T12]
[ 14.630024][ T12] netdev_run_todo+0x5f0/0xc60
[ 14.630194][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 14.630358][ T12] ? generic_xdp_install+0x410/0x410
[ 14.630600][ T12] ops_undo_list+0x714/0x890
[ 14.630769][ T12] ? netns_get+0x110/0x110
[ 14.630927][ T12] ? cleanup_net+0x2d6/0x830
[ 14.631112][ T12] cleanup_net+0x3b2/0x830
[ 14.631301][ T12] ? net_passive_dec+0x190/0x190
[ 14.631562][ T12] ? rcu_is_watching+0x12/0xb0
[ 14.631732][ T12] process_one_work+0xe35/0x1650
[ 14.631907][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 14.632090][ T12] ? assign_work+0x168/0x240
[ 14.632289][ T12] worker_thread+0x591/0xcf0
[ 14.632542][ T12] ? rescuer_thread+0xd10/0xd10
[ 14.632729][ T12] kthread+0x37b/0x5f0
[ 14.632878][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.633073][ T12] ? ret_from_fork+0x1b/0x270
[ 14.633287][ T12] ? __lock_release+0x5d/0x170
[ 14.633564][ T12] ? rcu_is_watching+0x12/0xb0
[ 14.633770][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.633982][ T12] ret_from_fork+0x1db/0x270
[ 14.634185][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 14.634402][ T12] ret_from_fork_asm+0x11/0x20
[ 14.634702][ T12]
[ 14.634848][ T12] irq event stamp: 3167
[ 14.634995][ T12] hardirqs last enabled at (3167): [] finish_task_switch.isra.0+0x245/0x960
[ 14.635368][ T12] hardirqs last disabled at (3166): [] __schedule+0x94a/0x1b10
[ 14.635781][ T12] softirqs last enabled at (2316): [] handle_softirqs+0x352/0x610
[ 14.636152][ T12] softirqs last disabled at (1857): [] irq_exit_rcu+0xab/0x100
[ 14.636625][ T12] ---[ end trace 0000000000000000 ]---