[ 16.763468][ T12] ==================================================================
[ 16.764014][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 16.764443][ T12] Read of size 1 at addr ffff888007841694 by task kworker/u16:0/12
[ 16.764857][ T12]
[ 16.765016][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.765024][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.765029][ T12] Workqueue: netns cleanup_net
[ 16.765040][ T12] Call Trace:
[ 16.765043][ T12]
[ 16.765046][ T12] dump_stack_lvl+0x82/0xc0
[ 16.765056][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 16.765067][ T12] ? kobject_put+0xbb/0xd0
[ 16.765074][ T12] print_report+0xb4/0x270
[ 16.765080][ T12] ? kobject_put+0xbb/0xd0
[ 16.765085][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 16.765092][ T12] ? kobject_put+0xbb/0xd0
[ 16.765096][ T12] kasan_report+0xca/0x100
[ 16.765104][ T12] ? kobject_put+0xbb/0xd0
[ 16.765114][ T12] kobject_put+0xbb/0xd0
[ 16.765118][ T12] netdev_run_todo+0x5f0/0xc60
[ 16.765125][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 16.765130][ T12] ? generic_xdp_install+0x410/0x410
[ 16.765142][ T12] ops_undo_list+0x714/0x890
[ 16.765150][ T12] ? netns_get+0x110/0x110
[ 16.765153][ T12] ? cleanup_net+0x2d6/0x830
[ 16.765163][ T12] cleanup_net+0x3b2/0x830
[ 16.765169][ T12] ? net_passive_dec+0x190/0x190
[ 16.765176][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.765186][ T12] process_one_work+0xe35/0x1650
[ 16.765198][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 16.765206][ T12] ? assign_work+0x168/0x240
[ 16.765212][ T12] worker_thread+0x591/0xcf0
[ 16.765223][ T12] ? rescuer_thread+0xd10/0xd10
[ 16.765229][ T12] kthread+0x37b/0x5f0
[ 16.765235][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.765239][ T12] ? ret_from_fork+0x1b/0x270
[ 16.765247][ T12] ? __lock_release+0x5d/0x170
[ 16.765256][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.765261][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.765268][ T12] ret_from_fork+0x1db/0x270
[ 16.765272][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.765277][ T12] ret_from_fork_asm+0x11/0x20
[ 16.765292][ T12]
[ 16.765295][ T12]
[ 16.776176][ T12] Allocated by task 229:
[ 16.776379][ T12] kasan_save_stack+0x24/0x40
[ 16.776675][ T12] kasan_save_track+0x14/0x30
[ 16.776979][ T12] __kasan_kmalloc+0x7b/0x90
[ 16.777266][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 16.777557][ T12] alloc_netdev_mqs+0x7d/0x1310
[ 16.777847][ T12] sit_init_net+0x169/0x550
[ 16.778138][ T12] ops_init+0x189/0x550
[ 16.778363][ T12] setup_net+0xf1/0x380
[ 16.778578][ T12] copy_net_ns+0x21a/0x380
[ 16.778893][ T12] create_new_namespaces+0x35f/0x900
[ 16.779191][ T12] unshare_nsproxy_namespaces+0x89/0x120
[ 16.779468][ T12] ksys_unshare+0x2a3/0x660
[ 16.779756][ T12] __x64_sys_unshare+0x31/0x40
[ 16.780039][ T12] do_syscall_64+0xc1/0xfd0
[ 16.780328][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.780685][ T12]
[ 16.780830][ T12] Freed by task 12:
[ 16.781038][ T12] kasan_save_stack+0x24/0x40
[ 16.781330][ T12] kasan_save_track+0x14/0x30
[ 16.781630][ T12] __kasan_save_free_info+0x3b/0x60
[ 16.781902][ T12] __kasan_slab_free+0x3f/0x60
[ 16.782183][ T12] kfree+0x21d/0x540
[ 16.782402][ T12] device_release+0x9c/0x210
[ 16.782684][ T12] kobject_cleanup+0xfe/0x360
[ 16.782972][ T12] netdev_run_todo+0x81f/0xc60
[ 16.783259][ T12] ops_undo_list+0x714/0x890
[ 16.783603][ T12] cleanup_net+0x3b2/0x830
[ 16.783922][ T12] process_one_work+0xe35/0x1650
[ 16.784214][ T12] worker_thread+0x591/0xcf0
[ 16.784509][ T12] kthread+0x37b/0x5f0
[ 16.784733][ T12] ret_from_fork+0x1db/0x270
[ 16.785034][ T12] ret_from_fork_asm+0x11/0x20
[ 16.785327][ T12]
[ 16.785478][ T12] The buggy address belongs to the object at ffff888007841000
[ 16.785478][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 16.786196][ T12] The buggy address is located 1684 bytes inside of
[ 16.786196][ T12] freed 4096-byte region [ffff888007841000, ffff888007842000)
[ 16.786911][ T12]
[ 16.787058][ T12] The buggy address belongs to the physical page:
[ 16.787409][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7840
[ 16.787917][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 16.788370][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 16.788742][ T12] page_type: f5(slab)
[ 16.788975][ T12] raw: 0080000000000040 ffff888001043700 ffffea00001d7610 ffffea00001d7810
[ 16.789493][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 16.790005][ T12] head: 0080000000000040 ffff888001043700 ffffea00001d7610 ffffea00001d7810
[ 16.790525][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 16.791035][ T12] head: 0080000000000003 ffffea00001e1001 00000000ffffffff 00000000ffffffff
[ 16.791530][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 16.792039][ T12] page dumped because: kasan: bad access detected
[ 16.792404][ T12]
[ 16.792549][ T12] Memory state around the buggy address:
[ 16.792823][ T12] ffff888007841580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.793215][ T12] ffff888007841600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.793621][ T12] >ffff888007841680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.794050][ T12] ^
[ 16.794318][ T12] ffff888007841700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.794734][ T12] ffff888007841780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.795154][ T12] ==================================================================
[ 16.796424][ T12] Disabling lock debugging due to kernel taint
[ 16.796819][ T12] ------------[ cut here ]------------
[ 16.797083][ T12] refcount_t: underflow; use-after-free.
[ 16.798212][ T12] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.798722][ T12] Modules linked in: veth
[ 16.798947][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.799595][ T12] Tainted: [B]=BAD_PAGE
[ 16.799814][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.800166][ T12] Workqueue: netns cleanup_net
[ 16.800475][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.800832][ 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 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
[ 16.801835][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 16.802174][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.802596][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.803013][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff1f3e134
[ 16.803453][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 16.803837][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.804331][ T12] FS: 0000000000000000(0000) GS:ffff8880a5410000(0000) knlGS:0000000000000000
[ 16.804726][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.804971][ T12] CR2: 00007fa89484f000 CR3: 00000000029ac005 CR4: 0000000000772ef0
[ 16.805329][ T12] PKRU: 55555554
[ 16.805476][ T12] Call Trace:
[ 16.805624][ T12]
[ 16.805726][ T12] netdev_run_todo+0x5f0/0xc60
[ 16.805988][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 16.806361][ T12] ? generic_xdp_install+0x410/0x410
[ 16.806597][ T12] ops_undo_list+0x714/0x890
[ 16.806837][ T12] ? netns_get+0x110/0x110
[ 16.807074][ T12] ? cleanup_net+0x2d6/0x830
[ 16.807420][ T12] cleanup_net+0x3b2/0x830
[ 16.807691][ T12] ? net_passive_dec+0x190/0x190
[ 16.807962][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.808315][ T12] process_one_work+0xe35/0x1650
[ 16.808564][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 16.808849][ T12] ? assign_work+0x168/0x240
[ 16.809130][ T12] worker_thread+0x591/0xcf0
[ 16.809527][ T12] ? rescuer_thread+0xd10/0xd10
[ 16.809804][ T12] kthread+0x37b/0x5f0
[ 16.810016][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.810408][ T12] ? ret_from_fork+0x1b/0x270
[ 16.810699][ T12] ? __lock_release+0x5d/0x170
[ 16.810971][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.811365][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.811660][ T12] ret_from_fork+0x1db/0x270
[ 16.811943][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.812331][ T12] ret_from_fork_asm+0x11/0x20
[ 16.812620][ T12]
[ 16.812832][ T12] irq event stamp: 2693
[ 16.813040][ T12] hardirqs last enabled at (2693): [] finish_task_switch.isra.0+0x245/0x960
[ 16.813700][ T12] hardirqs last disabled at (2692): [] __schedule+0x94a/0x1b10
[ 16.814325][ T12] softirqs last enabled at (2110): [] handle_softirqs+0x352/0x610
[ 16.814823][ T12] softirqs last disabled at (2101): [] irq_exit_rcu+0xab/0x100
[ 16.815420][ T12] ---[ end trace 0000000000000000 ]---
[ 17.694771][ T229] unsigned-md5_ip (229) used greatest stack depth: 23680 bytes left