[ 28.837310][ T12] ==================================================================
[ 28.837617][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 28.837890][ T12] Read of size 1 at addr ffff888005e896ac by task kworker/u16:0/12
[ 28.838144][ T12]
[ 28.838245][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 28.838250][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 28.838252][ T12] Workqueue: netns cleanup_net
[ 28.838260][ T12] Call Trace:
[ 28.838264][ T12]
[ 28.838267][ T12] dump_stack_lvl+0x82/0xc0
[ 28.838274][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 28.838281][ T12] ? kobject_put+0xbb/0xd0
[ 28.838285][ T12] print_report+0xb4/0x270
[ 28.838289][ T12] ? kobject_put+0xbb/0xd0
[ 28.838292][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 28.838296][ T12] ? kobject_put+0xbb/0xd0
[ 28.838299][ T12] kasan_report+0xca/0x100
[ 28.838304][ T12] ? kobject_put+0xbb/0xd0
[ 28.838309][ T12] kobject_put+0xbb/0xd0
[ 28.838313][ T12] netdev_run_todo+0x5f0/0xc60
[ 28.838318][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 28.838322][ T12] ? generic_xdp_install+0x410/0x410
[ 28.838329][ T12] ops_undo_list+0x714/0x890
[ 28.838336][ T12] ? netns_get+0x110/0x110
[ 28.838339][ T12] ? cleanup_net+0x2d6/0x830
[ 28.838344][ T12] cleanup_net+0x3b2/0x830
[ 28.838347][ T12] ? net_passive_dec+0x190/0x190
[ 28.838351][ T12] ? rcu_is_watching+0x12/0xb0
[ 28.838357][ T12] process_one_work+0xe35/0x1650
[ 28.838366][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 28.838371][ T12] ? assign_work+0x168/0x240
[ 28.838375][ T12] worker_thread+0x591/0xcf0
[ 28.838381][ T12] ? rescuer_thread+0xd10/0xd10
[ 28.838384][ T12] kthread+0x37b/0x5f0
[ 28.838388][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 28.838390][ T12] ? ret_from_fork+0x1b/0x270
[ 28.838396][ T12] ? __lock_release+0x5d/0x170
[ 28.838401][ T12] ? rcu_is_watching+0x12/0xb0
[ 28.838404][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 28.838408][ T12] ret_from_fork+0x1db/0x270
[ 28.838411][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 28.838413][ T12] ret_from_fork_asm+0x11/0x20
[ 28.838423][ T12]
[ 28.838424][ T12]
[ 28.845216][ T12] Allocated by task 252:
[ 28.845358][ T12] kasan_save_stack+0x24/0x40
[ 28.845541][ T12] kasan_save_track+0x14/0x30
[ 28.845762][ T12] __kasan_kmalloc+0x7b/0x90
[ 28.845962][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 28.846146][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 28.846331][ T12] sit_init_net+0x169/0x550
[ 28.846508][ T12] ops_init+0x189/0x550
[ 28.846649][ T12] setup_net+0xf1/0x380
[ 28.846793][ T12] copy_net_ns+0x21a/0x380
[ 28.846979][ T12] create_new_namespaces+0x35f/0x900
[ 28.847153][ T12] unshare_nsproxy_namespaces+0x89/0x120
[ 28.847339][ T12] ksys_unshare+0x2a3/0x660
[ 28.847511][ T12] __x64_sys_unshare+0x31/0x40
[ 28.847693][ T12] do_syscall_64+0xc1/0xfd0
[ 28.847873][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 28.848103][ T12]
[ 28.848197][ T12] Freed by task 12:
[ 28.848333][ T12] kasan_save_stack+0x24/0x40
[ 28.848509][ T12] kasan_save_track+0x14/0x30
[ 28.848690][ T12] __kasan_save_free_info+0x3b/0x60
[ 28.848868][ T12] __kasan_slab_free+0x3f/0x60
[ 28.849050][ T12] kfree+0x21d/0x540
[ 28.849178][ T12] device_release+0x9c/0x210
[ 28.849357][ T12] kobject_cleanup+0xfe/0x360
[ 28.849533][ T12] netdev_run_todo+0x81f/0xc60
[ 28.849729][ T12] ops_undo_list+0x714/0x890
[ 28.849903][ T12] cleanup_net+0x3b2/0x830
[ 28.850082][ T12] process_one_work+0xe35/0x1650
[ 28.850254][ T12] worker_thread+0x591/0xcf0
[ 28.850436][ T12] kthread+0x37b/0x5f0
[ 28.850562][ T12] ret_from_fork+0x1db/0x270
[ 28.850753][ T12] ret_from_fork_asm+0x11/0x20
[ 28.850939][ T12]
[ 28.851030][ T12] The buggy address belongs to the object at ffff888005e89000
[ 28.851030][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 28.851444][ T12] The buggy address is located 1708 bytes inside of
[ 28.851444][ T12] freed 4096-byte region [ffff888005e89000, ffff888005e8a000)
[ 28.851872][ T12]
[ 28.851973][ T12] The buggy address belongs to the physical page:
[ 28.852180][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e88
[ 28.852488][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 28.852763][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 28.852988][ T12] page_type: f5(slab)
[ 28.853135][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000222810 ffffea0000223a10
[ 28.853452][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 28.853771][ T12] head: 0080000000000040 ffff888001043700 ffffea0000222810 ffffea0000223a10
[ 28.854088][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 28.854399][ T12] head: 0080000000000003 ffffea000017a201 00000000ffffffff 00000000ffffffff
[ 28.854720][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 28.855031][ T12] page dumped because: kasan: bad access detected
[ 28.855245][ T12]
[ 28.855338][ T12] Memory state around the buggy address:
[ 28.855520][ T12] ffff888005e89580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.855796][ T12] ffff888005e89600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.856053][ T12] >ffff888005e89680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.856312][ T12] ^
[ 28.856481][ T12] ffff888005e89700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.856740][ T12] ffff888005e89780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.857003][ T12] ==================================================================
[ 28.857343][ T12] Disabling lock debugging due to kernel taint
[ 28.857623][ T12] ------------[ cut here ]------------
[ 28.857776][ T12] refcount_t: underflow; use-after-free.
[ 28.857963][ T12] WARNING: CPU: 3 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 28.858252][ T12] Modules linked in: ts_kmp ts_bm xt_string nft_compat nf_tables x_tables dummy
[ 28.858557][ T12] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 28.858912][ T12] Tainted: [B]=BAD_PAGE
[ 28.859031][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 28.859225][ T12] Workqueue: netns cleanup_net
[ 28.859410][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 28.859612][ T12] 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 af 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
[ 28.860161][ T12] RSP: 0000:ffffc900000c7a08 EFLAGS: 00010282
[ 28.860390][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 28.860620][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 28.860853][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff5ffe220
[ 28.861085][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 28.861319][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 28.861565][ T12] FS: 0000000000000000(0000) GS:ffff888084f6c000(0000) knlGS:0000000000000000
[ 28.861833][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 28.862031][ T12] CR2: 00007fe8ba3b5ab0 CR3: 000000000ed35004 CR4: 0000000000772ef0
[ 28.862264][ T12] PKRU: 55555554
[ 28.862387][ T12] Call Trace:
[ 28.862509][ T12]
[ 28.862590][ T12] netdev_run_todo+0x5f0/0xc60
[ 28.862750][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 28.862914][ T12] ? generic_xdp_install+0x410/0x410
[ 28.863071][ T12] ops_undo_list+0x714/0x890
[ 28.863247][ T12] ? netns_get+0x110/0x110
[ 28.863407][ T12] ? cleanup_net+0x2d6/0x830
[ 28.863560][ T12] cleanup_net+0x3b2/0x830
[ 28.863713][ T12] ? net_passive_dec+0x190/0x190
[ 28.863870][ T12] ? rcu_is_watching+0x12/0xb0
[ 28.864024][ T12] process_one_work+0xe35/0x1650
[ 28.864180][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 28.864336][ T12] ? assign_work+0x168/0x240
[ 28.864501][ T12] worker_thread+0x591/0xcf0
[ 28.864655][ T12] ? rescuer_thread+0xd10/0xd10
[ 28.864808][ T12] kthread+0x37b/0x5f0
[ 28.864931][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 28.865082][ T12] ? ret_from_fork+0x1b/0x270
[ 28.865244][ T12] ? __lock_release+0x5d/0x170
[ 28.865410][ T12] ? rcu_is_watching+0x12/0xb0
[ 28.865561][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 28.865712][ T12] ret_from_fork+0x1db/0x270
[ 28.865867][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 28.866019][ T12] ret_from_fork_asm+0x11/0x20
[ 28.866183][ T12]
[ 28.866303][ T12] irq event stamp: 3091
[ 28.866428][ T12] hardirqs last enabled at (3091): [] finish_task_switch.isra.0+0x245/0x960
[ 28.866730][ T12] hardirqs last disabled at (3090): [] __schedule+0x94a/0x1b10
[ 28.867003][ T12] softirqs last enabled at (2294): [] handle_softirqs+0x352/0x610
[ 28.867279][ T12] softirqs last disabled at (2289): [] irq_exit_rcu+0xab/0x100
[ 28.867549][ T12] ---[ end trace 0000000000000000 ]---