[   10.211294][  T253] ip (253) used greatest stack depth: 23280 bytes left
[   12.157617][   T11] ==================================================================
[   12.157857][   T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90
[   12.158060][   T11] Read of size 8 at addr ffff888004d69bf8 by task kworker/u16:0/11
[   12.158248][   T11] 
[   12.158323][   T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1
[   12.158528][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.158697][   T11] Workqueue: netns cleanup_net
[   12.158839][   T11] Call Trace:
[   12.158942][   T11]  <TASK>
[   12.159014][   T11]  dump_stack_lvl+0x82/0xd0
[   12.159155][   T11]  print_address_description.constprop.0+0x2c/0x3b0
[   12.159329][   T11]  ? cleanup_net+0xa5d/0xb90
[   12.159468][   T11]  print_report+0xb4/0x270
[   12.159602][   T11]  ? kasan_addr_to_slab+0x25/0x80
[   12.159737][   T11]  kasan_report+0xbd/0xf0
[   12.159839][   T11]  ? cleanup_net+0xa5d/0xb90
[   12.159976][   T11]  cleanup_net+0xa5d/0xb90
[   12.160115][   T11]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   12.160258][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   12.160396][   T11]  ? trace_lock_acquire+0x148/0x1f0
[   12.160533][   T11]  ? lock_acquire+0x32/0xc0
[   12.160663][   T11]  ? process_one_work+0xe0b/0x16d0
[   12.160798][   T11]  process_one_work+0xe55/0x16d0
[   12.160936][   T11]  ? __pfx___lock_release+0x10/0x10
[   12.161075][   T11]  ? __pfx_process_one_work+0x10/0x10
[   12.161208][   T11]  ? assign_work+0x16c/0x240
[   12.161341][   T11]  worker_thread+0x58c/0xce0
[   12.161479][   T11]  ? __pfx_worker_thread+0x10/0x10
[   12.161614][   T11]  kthread+0x28a/0x350
[   12.161722][   T11]  ? __pfx_kthread+0x10/0x10
[   12.161858][   T11]  ret_from_fork+0x31/0x70
[   12.161993][   T11]  ? __pfx_kthread+0x10/0x10
[   12.162130][   T11]  ret_from_fork_asm+0x1a/0x30
[   12.162269][   T11]  </TASK>
[   12.162372][   T11] 
[   12.162442][   T11] Allocated by task 270:
[   12.162544][   T11]  kasan_save_stack+0x24/0x50
[   12.162681][   T11]  kasan_save_track+0x14/0x30
[   12.162816][   T11]  __kasan_slab_alloc+0x59/0x70
[   12.162947][   T11]  kmem_cache_alloc_noprof+0x10b/0x350
[   12.163082][   T11]  copy_net_ns+0xc6/0x540
[   12.163184][   T11]  create_new_namespaces+0x35f/0x920
[   12.163326][   T11]  unshare_nsproxy_namespaces+0x8a/0x1b0
[   12.163467][   T11]  ksys_unshare+0x2c4/0x6e0
[   12.163610][   T11]  __x64_sys_unshare+0x31/0x40
[   12.163747][   T11]  do_syscall_64+0xc1/0x1d0
[   12.163890][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   12.164071][   T11] 
[   12.164143][   T11] Freed by task 11:
[   12.164247][   T11]  kasan_save_stack+0x24/0x50
[   12.164388][   T11]  kasan_save_track+0x14/0x30
[   12.164526][   T11]  kasan_save_free_info+0x3b/0x60
[   12.164670][   T11]  __kasan_slab_free+0x38/0x50
[   12.164807][   T11]  kmem_cache_free+0xf8/0x330
[   12.164946][   T11]  cleanup_net+0x5a8/0xb90
[   12.165081][   T11]  process_one_work+0xe55/0x16d0
[   12.165217][   T11]  worker_thread+0x58c/0xce0
[   12.165349][   T11]  kthread+0x28a/0x350
[   12.165455][   T11]  ret_from_fork+0x31/0x70
[   12.165593][   T11]  ret_from_fork_asm+0x1a/0x30
[   12.165732][   T11] 
[   12.165811][   T11] The buggy address belongs to the object at ffff888004d69b40
[   12.165811][   T11]  which belongs to the cache net_namespace of size 6528
[   12.166186][   T11] The buggy address is located 184 bytes inside of
[   12.166186][   T11]  freed 6528-byte region [ffff888004d69b40, ffff888004d6b4c0)
[   12.166528][   T11] 
[   12.166601][   T11] The buggy address belongs to the physical page:
[   12.166771][   T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004d6b640 pfn:0x4d68
[   12.167052][   T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   12.167258][   T11] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   12.167435][   T11] page_type: f5(slab)
[   12.167545][   T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088
[   12.167791][   T11] raw: ffff888004d6b640 0000000000040002 00000001f5000000 0000000000000000
[   12.168034][   T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088
[   12.168279][   T11] head: ffff888004d6b640 0000000000040002 00000001f5000000 0000000000000000
[   12.168516][   T11] head: 0080000000000003 ffffea0000135a01 ffffffffffffffff 0000000000000000
[   12.168757][   T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   12.168995][   T11] page dumped because: kasan: bad access detected
[   12.169166][   T11] 
[   12.169236][   T11] Memory state around the buggy address:
[   12.169374][   T11]  ffff888004d69a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   12.169570][   T11]  ffff888004d69b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   12.169763][   T11] >ffff888004d69b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   12.169962][   T11]                                                                 ^
[   12.170157][   T11]  ffff888004d69c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   12.170356][   T11]  ffff888004d69c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   12.170550][   T11] ==================================================================
[   12.171031][   T11] Disabling lock debugging due to kernel taint