[   11.423052][   T67] ==================================================================
[   11.423339][   T67] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   11.423582][   T67] Read of size 8 at addr ffff8880025100f8 by task kworker/u16:1/67
[   11.423788][   T67] 
[   11.423862][   T67] CPU: 3 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1
[   11.424079][   T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.424264][   T67] Workqueue: netns cleanup_net
[   11.424416][   T67] Call Trace:
[   11.424529][   T67]  <TASK>
[   11.424605][   T67]  dump_stack_lvl+0x82/0xd0
[   11.424757][   T67]  print_address_description.constprop.0+0x2c/0x3b0
[   11.424939][   T67]  ? cleanup_net+0x932/0xa40
[   11.425080][   T67]  print_report+0xb4/0x270
[   11.425227][   T67]  ? kasan_addr_to_slab+0x25/0x80
[   11.425426][   T67]  kasan_report+0xbd/0xf0
[   11.425589][   T67]  ? cleanup_net+0x932/0xa40
[   11.425803][   T67]  cleanup_net+0x932/0xa40
[   11.426013][   T67]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   11.426239][   T67]  ? __pfx_cleanup_net+0x10/0x10
[   11.426451][   T67]  ? trace_lock_acquire+0x148/0x1f0
[   11.426621][   T67]  ? lock_acquire+0x32/0xc0
[   11.426764][   T67]  ? process_one_work+0xe0b/0x16d0
[   11.426911][   T67]  process_one_work+0xe55/0x16d0
[   11.427055][   T67]  ? __pfx___lock_release+0x10/0x10
[   11.427197][   T67]  ? __pfx_process_one_work+0x10/0x10
[   11.427349][   T67]  ? assign_work+0x16c/0x240
[   11.427488][   T67]  worker_thread+0x58c/0xce0
[   11.427631][   T67]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[   11.427807][   T67]  ? __pfx_worker_thread+0x10/0x10
[   11.427949][   T67]  ? __pfx_worker_thread+0x10/0x10
[   11.428090][   T67]  kthread+0x28a/0x350
[   11.428201][   T67]  ? __pfx_kthread+0x10/0x10
[   11.428355][   T67]  ret_from_fork+0x31/0x70
[   11.428504][   T67]  ? __pfx_kthread+0x10/0x10
[   11.428647][   T67]  ret_from_fork_asm+0x1a/0x30
[   11.428794][   T67]  </TASK>
[   11.428901][   T67] 
[   11.428974][   T67] Allocated by task 227:
[   11.429082][   T67]  kasan_save_stack+0x24/0x50
[   11.429229][   T67]  kasan_save_track+0x14/0x30
[   11.429431][   T67]  __kasan_slab_alloc+0x59/0x70
[   11.429641][   T67]  kmem_cache_alloc_noprof+0x10b/0x350
[   11.429803][   T67]  copy_net_ns+0xc6/0x340
[   11.429912][   T67]  create_new_namespaces+0x35f/0x920
[   11.430074][   T67]  unshare_nsproxy_namespaces+0x8d/0x130
[   11.430219][   T67]  ksys_unshare+0x2a9/0x660
[   11.430372][   T67]  __x64_sys_unshare+0x31/0x40
[   11.430512][   T67]  do_syscall_64+0xc1/0x1d0
[   11.430656][   T67]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   11.430833][   T67] 
[   11.430906][   T67] Freed by task 67:
[   11.431017][   T67]  kasan_save_stack+0x24/0x50
[   11.431159][   T67]  kasan_save_track+0x14/0x30
[   11.431305][   T67]  kasan_save_free_info+0x3b/0x60
[   11.431456][   T67]  __kasan_slab_free+0x38/0x50
[   11.431596][   T67]  kmem_cache_free+0xf8/0x330
[   11.431735][   T67]  cleanup_net+0x5a8/0xa40
[   11.431875][   T67]  process_one_work+0xe55/0x16d0
[   11.432019][   T67]  worker_thread+0x58c/0xce0
[   11.432159][   T67]  kthread+0x28a/0x350
[   11.432269][   T67]  ret_from_fork+0x31/0x70
[   11.432412][   T67]  ret_from_fork_asm+0x1a/0x30
[   11.432572][   T67] 
[   11.432646][   T67] The buggy address belongs to the object at ffff888002510040
[   11.432646][   T67]  which belongs to the cache net_namespace of size 5696
[   11.433012][   T67] The buggy address is located 184 bytes inside of
[   11.433012][   T67]  freed 5696-byte region [ffff888002510040, ffff888002511680)
[   11.433362][   T67] 
[   11.433435][   T67] The buggy address belongs to the physical page:
[   11.433609][   T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888002512fc0 pfn:0x2510
[   11.433893][   T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   11.434103][   T67] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   11.434292][   T67] page_type: f5(slab)
[   11.434404][   T67] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.434656][   T67] raw: ffff888002512fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.434901][   T67] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.435146][   T67] head: ffff888002512fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.435399][   T67] head: 0080000000000003 ffffea0000094401 ffffffffffffffff 0000000000000000
[   11.435648][   T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   11.435890][   T67] page dumped because: kasan: bad access detected
[   11.436063][   T67] 
[   11.436133][   T67] Memory state around the buggy address:
[   11.436321][   T67]  ffff88800250ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   11.436537][   T67]  ffff888002510000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   11.436756][   T67] >ffff888002510080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.436959][   T67]                                                                 ^
[   11.437163][   T67]  ffff888002510100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.437372][   T67]  ffff888002510180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.437572][   T67] ==================================================================
[   11.437827][   T67] Disabling lock debugging due to kernel taint