[   10.018698][   T66] ==================================================================
[   10.018945][   T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   10.019159][   T66] Read of size 8 at addr ffff88800b9a80f8 by task kworker/u16:1/66
[   10.019355][   T66] 
[   10.019426][   T66] CPU: 1 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1
[   10.019631][   T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   10.019810][   T66] Workqueue: netns cleanup_net
[   10.019954][   T66] Call Trace:
[   10.020057][   T66]  <TASK>
[   10.020132][   T66]  dump_stack_lvl+0x82/0xd0
[   10.020276][   T66]  print_address_description.constprop.0+0x2c/0x3b0
[   10.020450][   T66]  ? cleanup_net+0x932/0xa40
[   10.020589][   T66]  print_report+0xb4/0x270
[   10.020723][   T66]  ? kasan_addr_to_slab+0x25/0x80
[   10.020865][   T66]  kasan_report+0xbd/0xf0
[   10.020973][   T66]  ? cleanup_net+0x932/0xa40
[   10.021109][   T66]  cleanup_net+0x932/0xa40
[   10.021245][   T66]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   10.021384][   T66]  ? __pfx_cleanup_net+0x10/0x10
[   10.021519][   T66]  ? trace_lock_acquire+0x148/0x1f0
[   10.021655][   T66]  ? lock_acquire+0x32/0xc0
[   10.021788][   T66]  ? process_one_work+0xe0b/0x16d0
[   10.021929][   T66]  process_one_work+0xe55/0x16d0
[   10.022067][   T66]  ? __pfx___lock_release+0x10/0x10
[   10.022204][   T66]  ? __pfx_process_one_work+0x10/0x10
[   10.022338][   T66]  ? assign_work+0x16c/0x240
[   10.022474][   T66]  worker_thread+0x58c/0xce0
[   10.022611][   T66]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[   10.022782][   T66]  ? __pfx_worker_thread+0x10/0x10
[   10.022917][   T66]  ? __pfx_worker_thread+0x10/0x10
[   10.023052][   T66]  kthread+0x28a/0x350
[   10.023157][   T66]  ? __pfx_kthread+0x10/0x10
[   10.023295][   T66]  ret_from_fork+0x31/0x70
[   10.023430][   T66]  ? __pfx_kthread+0x10/0x10
[   10.023567][   T66]  ret_from_fork_asm+0x1a/0x30
[   10.023708][   T66]  </TASK>
[   10.023812][   T66] 
[   10.023890][   T66] Allocated by task 227:
[   10.023992][   T66]  kasan_save_stack+0x24/0x50
[   10.024129][   T66]  kasan_save_track+0x14/0x30
[   10.024266][   T66]  __kasan_slab_alloc+0x59/0x70
[   10.024403][   T66]  kmem_cache_alloc_noprof+0x10b/0x350
[   10.024539][   T66]  copy_net_ns+0xc6/0x340
[   10.024639][   T66]  create_new_namespaces+0x35f/0x920
[   10.024776][   T66]  unshare_nsproxy_namespaces+0x8d/0x130
[   10.024913][   T66]  ksys_unshare+0x2a9/0x660
[   10.025050][   T66]  __x64_sys_unshare+0x31/0x40
[   10.025193][   T66]  do_syscall_64+0xc1/0x1d0
[   10.025329][   T66]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   10.025495][   T66] 
[   10.025563][   T66] Freed by task 66:
[   10.025663][   T66]  kasan_save_stack+0x24/0x50
[   10.025801][   T66]  kasan_save_track+0x14/0x30
[   10.025934][   T66]  kasan_save_free_info+0x3b/0x60
[   10.026068][   T66]  __kasan_slab_free+0x38/0x50
[   10.026207][   T66]  kmem_cache_free+0xf8/0x330
[   10.026340][   T66]  cleanup_net+0x5a8/0xa40
[   10.026474][   T66]  process_one_work+0xe55/0x16d0
[   10.026606][   T66]  worker_thread+0x58c/0xce0
[   10.026736][   T66]  kthread+0x28a/0x350
[   10.026837][   T66]  ret_from_fork+0x31/0x70
[   10.026969][   T66]  ret_from_fork_asm+0x1a/0x30
[   10.027101][   T66] 
[   10.027172][   T66] The buggy address belongs to the object at ffff88800b9a8040
[   10.027172][   T66]  which belongs to the cache net_namespace of size 5696
[   10.027532][   T66] The buggy address is located 184 bytes inside of
[   10.027532][   T66]  freed 5696-byte region [ffff88800b9a8040, ffff88800b9a9680)
[   10.027848][   T66] 
[   10.027917][   T66] The buggy address belongs to the physical page:
[   10.028084][   T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b9aafc0 pfn:0xb9a8
[   10.028357][   T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   10.028558][   T66] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   10.028732][   T66] page_type: f5(slab)
[   10.028841][   T66] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   10.029086][   T66] raw: ffff88800b9aafc0 0000000000050002 00000001f5000000 0000000000000000
[   10.029326][   T66] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   10.029556][   T66] head: ffff88800b9aafc0 0000000000050002 00000001f5000000 0000000000000000
[   10.029786][   T66] head: 0080000000000003 ffffea00002e6a01 ffffffffffffffff 0000000000000000
[   10.030022][   T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   10.030254][   T66] page dumped because: kasan: bad access detected
[   10.030418][   T66] 
[   10.030485][   T66] Memory state around the buggy address:
[   10.030617][   T66]  ffff88800b9a7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   10.030814][   T66]  ffff88800b9a8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   10.031011][   T66] >ffff88800b9a8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.031205][   T66]                                                                 ^
[   10.031395][   T66]  ffff88800b9a8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.031585][   T66]  ffff88800b9a8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.031780][   T66] ==================================================================
[   10.032061][   T66] Disabling lock debugging due to kernel taint