[   25.901627][   T11] ==================================================================
[   25.901930][   T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90
[   25.902129][   T11] Read of size 8 at addr ffff88800a9a80f8 by task kworker/u16:0/11
[   25.902317][   T11] 
[   25.902388][   T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1
[   25.902581][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   25.902745][   T11] Workqueue: netns cleanup_net
[   25.902882][   T11] Call Trace:
[   25.902987][   T11]  <TASK>
[   25.903058][   T11]  dump_stack_lvl+0x82/0xd0
[   25.903194][   T11]  print_address_description.constprop.0+0x2c/0x3b0
[   25.903357][   T11]  ? cleanup_net+0xa5d/0xb90
[   25.903493][   T11]  print_report+0xb4/0x270
[   25.903625][   T11]  ? kasan_addr_to_slab+0x25/0x80
[   25.903757][   T11]  kasan_report+0xbd/0xf0
[   25.903856][   T11]  ? cleanup_net+0xa5d/0xb90
[   25.903992][   T11]  cleanup_net+0xa5d/0xb90
[   25.904122][   T11]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   25.904258][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   25.904388][   T11]  ? trace_lock_acquire+0x148/0x1f0
[   25.904522][   T11]  ? lock_acquire+0x32/0xc0
[   25.904661][   T11]  ? process_one_work+0xe0b/0x16d0
[   25.904794][   T11]  process_one_work+0xe55/0x16d0
[   25.904926][   T11]  ? __pfx___lock_release+0x10/0x10
[   25.905055][   T11]  ? __pfx_process_one_work+0x10/0x10
[   25.905189][   T11]  ? assign_work+0x16c/0x240
[   25.905328][   T11]  worker_thread+0x58c/0xce0
[   25.905463][   T11]  ? __pfx_worker_thread+0x10/0x10
[   25.905593][   T11]  kthread+0x28a/0x350
[   25.905693][   T11]  ? __pfx_kthread+0x10/0x10
[   25.905827][   T11]  ret_from_fork+0x31/0x70
[   25.905960][   T11]  ? __pfx_kthread+0x10/0x10
[   25.906092][   T11]  ret_from_fork_asm+0x1a/0x30
[   25.906231][   T11]  </TASK>
[   25.906333][   T11] 
[   25.906400][   T11] Allocated by task 263:
[   25.906502][   T11]  kasan_save_stack+0x24/0x50
[   25.906635][   T11]  kasan_save_track+0x14/0x30
[   25.906764][   T11]  __kasan_slab_alloc+0x59/0x70
[   25.906892][   T11]  kmem_cache_alloc_noprof+0x10b/0x350
[   25.907030][   T11]  copy_net_ns+0xc6/0x540
[   25.907130][   T11]  create_new_namespaces+0x35f/0x920
[   25.907261][   T11]  unshare_nsproxy_namespaces+0x8a/0x1b0
[   25.907392][   T11]  ksys_unshare+0x2c4/0x6e0
[   25.907529][   T11]  __x64_sys_unshare+0x31/0x40
[   25.907661][   T11]  do_syscall_64+0xc1/0x1d0
[   25.907793][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   25.907956][   T11] 
[   25.908024][   T11] Freed by task 11:
[   25.908125][   T11]  kasan_save_stack+0x24/0x50
[   25.908259][   T11]  kasan_save_track+0x14/0x30
[   25.908388][   T11]  kasan_save_free_info+0x3b/0x60
[   25.908519][   T11]  __kasan_slab_free+0x38/0x50
[   25.908650][   T11]  kmem_cache_free+0xf8/0x330
[   25.908781][   T11]  cleanup_net+0x5a8/0xb90
[   25.908912][   T11]  process_one_work+0xe55/0x16d0
[   25.909044][   T11]  worker_thread+0x58c/0xce0
[   25.909181][   T11]  kthread+0x28a/0x350
[   25.909279][   T11]  ret_from_fork+0x31/0x70
[   25.909430][   T11]  ret_from_fork_asm+0x1a/0x30
[   25.909560][   T11] 
[   25.909628][   T11] Last potentially related work creation:
[   25.909758][   T11]  kasan_save_stack+0x24/0x50
[   25.909892][   T11]  __kasan_record_aux_stack+0x8e/0xa0
[   25.910023][   T11]  insert_work+0x34/0x230
[   25.910140][   T11]  __queue_work+0x5fd/0xa40
[   25.910271][   T11]  queue_delayed_work_on+0x8c/0xa0
[   25.910401][   T11]  __inet_insert_ifa+0x751/0xb10
[   25.910536][   T11]  inet_rtm_newaddr+0x833/0xbd0
[   25.910668][   T11]  rtnetlink_rcv_msg+0x712/0xc10
[   25.910803][   T11]  netlink_rcv_skb+0x130/0x360
[   25.910938][   T11]  netlink_unicast+0x44b/0x710
[   25.911071][   T11]  netlink_sendmsg+0x723/0xbe0
[   25.911206][   T11]  ____sys_sendmsg+0x7ac/0xa10
[   25.911340][   T11]  ___sys_sendmsg+0xee/0x170
[   25.911473][   T11]  __sys_sendmsg+0x109/0x1a0
[   25.911606][   T11]  do_syscall_64+0xc1/0x1d0
[   25.911739][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   25.911903][   T11] 
[   25.911986][   T11] Second to last potentially related work creation:
[   25.912145][   T11]  kasan_save_stack+0x24/0x50
[   25.912281][   T11]  __kasan_record_aux_stack+0x8e/0xa0
[   25.912415][   T11]  insert_work+0x34/0x230
[   25.912523][   T11]  __queue_work+0x5fd/0xa40
[   25.912653][   T11]  queue_delayed_work_on+0x8c/0xa0
[   25.912783][   T11]  __inet_insert_ifa+0x751/0xb10
[   25.912916][   T11]  inet_rtm_newaddr+0x833/0xbd0
[   25.913046][   T11]  rtnetlink_rcv_msg+0x712/0xc10
[   25.913181][   T11]  netlink_rcv_skb+0x130/0x360
[   25.913315][   T11]  netlink_unicast+0x44b/0x710
[   25.913446][   T11]  netlink_sendmsg+0x723/0xbe0
[   25.913577][   T11]  ____sys_sendmsg+0x7ac/0xa10
[   25.913707][   T11]  ___sys_sendmsg+0xee/0x170
[   25.913837][   T11]  __sys_sendmsg+0x109/0x1a0
[   25.913974][   T11]  do_syscall_64+0xc1/0x1d0
[   25.914108][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   25.914276][   T11] 
[   25.914344][   T11] The buggy address belongs to the object at ffff88800a9a8040
[   25.914344][   T11]  which belongs to the cache net_namespace of size 6528
[   25.914689][   T11] The buggy address is located 184 bytes inside of
[   25.914689][   T11]  freed 6528-byte region [ffff88800a9a8040, ffff88800a9a99c0)
[   25.915002][   T11] 
[   25.915070][   T11] The buggy address belongs to the physical page:
[   25.915234][   T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a9ab640 pfn:0xa9a8
[   25.915495][   T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   25.915693][   T11] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   25.915863][   T11] page_type: f5(slab)
[   25.915968][   T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088
[   25.916205][   T11] raw: ffff88800a9ab640 0000000000040002 00000001f5000000 0000000000000000
[   25.916440][   T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088
[   25.916675][   T11] head: ffff88800a9ab640 0000000000040002 00000001f5000000 0000000000000000
[   25.916906][   T11] head: 0080000000000003 ffffea00002a6a01 ffffffffffffffff 0000000000000000
[   25.917141][   T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   25.917372][   T11] page dumped because: kasan: bad access detected
[   25.917534][   T11] 
[   25.917601][   T11] Memory state around the buggy address:
[   25.917731][   T11]  ffff88800a9a7f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   25.917923][   T11]  ffff88800a9a8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   25.918110][   T11] >ffff88800a9a8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   25.918301][   T11]                                                                 ^
[   25.918489][   T11]  ffff88800a9a8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   25.918681][   T11]  ffff88800a9a8180: fb fb fb fb fb fb fb fb