[   40.053566][   T11] ==================================================================
[   40.053791][   T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   40.053984][   T11] Read of size 8 at addr ffff8880099980f8 by task kworker/u16:0/11
[   40.054171][   T11] 
[   40.054235][   T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1
[   40.054454][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   40.054615][   T11] Workqueue: netns cleanup_net
[   40.054749][   T11] Call Trace:
[   40.054845][   T11]  <TASK>
[   40.054916][   T11]  dump_stack_lvl+0x82/0xd0
[   40.055049][   T11]  print_address_description.constprop.0+0x2c/0x3b0
[   40.055210][   T11]  ? cleanup_net+0x932/0xa40
[   40.055379][   T11]  print_report+0xb4/0x270
[   40.055505][   T11]  ? kasan_addr_to_slab+0x25/0x80
[   40.055633][   T11]  kasan_report+0xbd/0xf0
[   40.055729][   T11]  ? cleanup_net+0x932/0xa40
[   40.055855][   T11]  cleanup_net+0x932/0xa40
[   40.056000][   T11]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   40.056145][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   40.056299][   T11]  ? trace_lock_acquire+0x148/0x1f0
[   40.056431][   T11]  ? lock_acquire+0x32/0xc0
[   40.056557][   T11]  ? process_one_work+0xe0b/0x16d0
[   40.056690][   T11]  process_one_work+0xe55/0x16d0
[   40.056814][   T11]  ? __pfx___lock_release+0x10/0x10
[   40.056939][   T11]  ? __pfx_process_one_work+0x10/0x10
[   40.057069][   T11]  ? assign_work+0x16c/0x240
[   40.057197][   T11]  worker_thread+0x58c/0xce0
[   40.057338][   T11]  ? __pfx_worker_thread+0x10/0x10
[   40.057464][   T11]  kthread+0x28a/0x350
[   40.057565][   T11]  ? __pfx_kthread+0x10/0x10
[   40.057743][   T11]  ret_from_fork+0x31/0x70
[   40.057869][   T11]  ? __pfx_kthread+0x10/0x10
[   40.057997][   T11]  ret_from_fork_asm+0x1a/0x30
[   40.058131][   T11]  </TASK>
[   40.058229][   T11] 
[   40.058314][   T11] Allocated by task 264:
[   40.058411][   T11]  kasan_save_stack+0x24/0x50
[   40.058544][   T11]  kasan_save_track+0x14/0x30
[   40.058666][   T11]  __kasan_slab_alloc+0x59/0x70
[   40.058793][   T11]  kmem_cache_alloc_noprof+0x10b/0x350
[   40.058913][   T11]  copy_net_ns+0xc6/0x340
[   40.059009][   T11]  create_new_namespaces+0x35f/0x920
[   40.059145][   T11]  unshare_nsproxy_namespaces+0x8d/0x130
[   40.059338][   T11]  ksys_unshare+0x2a9/0x660
[   40.059466][   T11]  __x64_sys_unshare+0x31/0x40
[   40.059591][   T11]  do_syscall_64+0xc1/0x1d0
[   40.059717][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   40.059871][   T11] 
[   40.059932][   T11] Freed by task 11:
[   40.060025][   T11]  kasan_save_stack+0x24/0x50
[   40.060151][   T11]  kasan_save_track+0x14/0x30
[   40.060285][   T11]  kasan_save_free_info+0x3b/0x60
[   40.060411][   T11]  __kasan_slab_free+0x38/0x50
[   40.060534][   T11]  kmem_cache_free+0xf8/0x330
[   40.060653][   T11]  cleanup_net+0x5a8/0xa40
[   40.060827][   T11]  process_one_work+0xe55/0x16d0
[   40.060955][   T11]  worker_thread+0x58c/0xce0
[   40.061079][   T11]  kthread+0x28a/0x350
[   40.061174][   T11]  ret_from_fork+0x31/0x70
[   40.061336][   T11]  ret_from_fork_asm+0x1a/0x30
[   40.061478][   T11] 
[   40.061542][   T11] The buggy address belongs to the object at ffff888009998040
[   40.061542][   T11]  which belongs to the cache net_namespace of size 5696
[   40.061872][   T11] The buggy address is located 184 bytes inside of
[   40.061872][   T11]  freed 5696-byte region [ffff888009998040, ffff888009999680)
[   40.062202][   T11] 
[   40.062290][   T11] The buggy address belongs to the physical page:
[   40.062455][   T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800999afc0 pfn:0x9998
[   40.062717][   T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   40.062950][   T11] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   40.063114][   T11] page_type: f5(slab)
[   40.063212][   T11] raw: 0080000000000240 ffff888001927240 ffff88800192a088 ffff88800192a088
[   40.063463][   T11] raw: ffff88800999afc0 0000000000050002 00000001f5000000 0000000000000000
[   40.063689][   T11] head: 0080000000000240 ffff888001927240 ffff88800192a088 ffff88800192a088
[   40.063931][   T11] head: ffff88800999afc0 0000000000050002 00000001f5000000 0000000000000000
[   40.064156][   T11] head: 0080000000000003 ffffea0000266601 ffffffffffffffff 0000000000000000
[   40.064390][   T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   40.064608][   T11] page dumped because: kasan: bad access detected
[   40.064764][   T11] 
[   40.064828][   T11] Memory state around the buggy address:
[   40.064958][   T11]  ffff888009997f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   40.065144][   T11]  ffff888009998000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   40.065334][   T11] >ffff888009998080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   40.065515][   T11]                                                                 ^
[   40.065698][   T11]  ffff888009998100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   40.065918][   T11]  ffff888009998180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   40.066104][   T11] ==================================================================
[   40.066372][   T11] Disabling lock debugging due to kernel taint