[   10.641712][   T67] ==================================================================
[   10.642061][   T67] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   10.642376][   T67] Read of size 8 at addr ffff88800b0000f8 by task kworker/u16:1/67
[   10.642680][   T67] 
[   10.642787][   T67] CPU: 1 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1
[   10.643103][   T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   10.643367][   T67] Workqueue: netns cleanup_net
[   10.643592][   T67] Call Trace:
[   10.643749][   T67]  <TASK>
[   10.643859][   T67]  dump_stack_lvl+0x82/0xd0
[   10.644076][   T67]  print_address_description.constprop.0+0x2c/0x3b0
[   10.644345][   T67]  ? cleanup_net+0x932/0xa40
[   10.644557][   T67]  print_report+0xb4/0x270
[   10.644765][   T67]  ? kasan_addr_to_slab+0x25/0x80
[   10.644977][   T67]  kasan_report+0xbd/0xf0
[   10.645139][   T67]  ? cleanup_net+0x932/0xa40
[   10.645382][   T67]  cleanup_net+0x932/0xa40
[   10.645595][   T67]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   10.645806][   T67]  ? __pfx_cleanup_net+0x10/0x10
[   10.646019][   T67]  ? trace_lock_acquire+0x148/0x1f0
[   10.646230][   T67]  ? lock_acquire+0x32/0xc0
[   10.646435][   T67]  ? process_one_work+0xe0b/0x16d0
[   10.646642][   T67]  process_one_work+0xe55/0x16d0
[   10.646855][   T67]  ? __pfx___lock_release+0x10/0x10
[   10.647067][   T67]  ? __pfx_process_one_work+0x10/0x10
[   10.647283][   T67]  ? assign_work+0x16c/0x240
[   10.647496][   T67]  worker_thread+0x58c/0xce0
[   10.647705][   T67]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[   10.647968][   T67]  ? __pfx_worker_thread+0x10/0x10
[   10.648193][   T67]  ? __pfx_worker_thread+0x10/0x10
[   10.648403][   T67]  kthread+0x28a/0x350
[   10.648566][   T67]  ? __pfx_kthread+0x10/0x10
[   10.648775][   T67]  ret_from_fork+0x31/0x70
[   10.648988][   T67]  ? __pfx_kthread+0x10/0x10
[   10.649200][   T67]  ret_from_fork_asm+0x1a/0x30
[   10.649418][   T67]  </TASK>
[   10.649578][   T67] 
[   10.649685][   T67] Allocated by task 227:
[   10.649837][   T67]  kasan_save_stack+0x24/0x50
[   10.650053][   T67]  kasan_save_track+0x14/0x30
[   10.650255][   T67]  __kasan_slab_alloc+0x59/0x70
[   10.650454][   T67]  kmem_cache_alloc_noprof+0x10b/0x350
[   10.650652][   T67]  copy_net_ns+0xc6/0x340
[   10.650805][   T67]  create_new_namespaces+0x35f/0x920
[   10.651016][   T67]  unshare_nsproxy_namespaces+0x8d/0x130
[   10.651226][   T67]  ksys_unshare+0x2a9/0x660
[   10.651440][   T67]  __x64_sys_unshare+0x31/0x40
[   10.651648][   T67]  do_syscall_64+0xc1/0x1d0
[   10.651859][   T67]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   10.652123][   T67] 
[   10.652229][   T67] Freed by task 67:
[   10.652384][   T67]  kasan_save_stack+0x24/0x50
[   10.652585][   T67]  kasan_save_track+0x14/0x30
[   10.652778][   T67]  kasan_save_free_info+0x3b/0x60
[   10.652976][   T67]  __kasan_slab_free+0x38/0x50
[   10.653170][   T67]  kmem_cache_free+0xf8/0x330
[   10.653377][   T67]  cleanup_net+0x5a8/0xa40
[   10.653590][   T67]  process_one_work+0xe55/0x16d0
[   10.653781][   T67]  worker_thread+0x58c/0xce0
[   10.653988][   T67]  kthread+0x28a/0x350
[   10.654145][   T67]  ret_from_fork+0x31/0x70
[   10.654339][   T67]  ret_from_fork_asm+0x1a/0x30
[   10.654539][   T67] 
[   10.654637][   T67] The buggy address belongs to the object at ffff88800b000040
[   10.654637][   T67]  which belongs to the cache net_namespace of size 5696
[   10.655186][   T67] The buggy address is located 184 bytes inside of
[   10.655186][   T67]  freed 5696-byte region [ffff88800b000040, ffff88800b001680)
[   10.655661][   T67] 
[   10.655768][   T67] The buggy address belongs to the physical page:
[   10.656011][   T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b002fc0 pfn:0xb000
[   10.656430][   T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   10.656743][   T67] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   10.657010][   T67] page_type: f5(slab)
[   10.657174][   T67] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   10.657545][   T67] raw: ffff88800b002fc0 0000000000050002 00000001f5000000 0000000000000000
[   10.657913][   T67] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   10.658292][   T67] head: ffff88800b002fc0 0000000000050002 00000001f5000000 0000000000000000
[   10.658660][   T67] head: 0080000000000003 ffffea00002c0001 ffffffffffffffff 0000000000000000
[   10.659025][   T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   10.659398][   T67] page dumped because: kasan: bad access detected
[   10.659655][   T67] 
[   10.659761][   T67] Memory state around the buggy address:
[   10.659963][   T67]  ffff88800affff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   10.660260][   T67]  ffff88800b000000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   10.660562][   T67] >ffff88800b000080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.660863][   T67]                                                                 ^
[   10.661157][   T67]  ffff88800b000100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.661456][   T67]  ffff88800b000180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.661744][   T67] ==================================================================
[   10.662144][   T67] Disabling lock debugging due to kernel taint
[   10.987093][    C2] TCP: request_sock_TCP: Possible SYN flooding on port 10.0.254.1:7010. Sending cookies.