[   11.127787][   T11] ==================================================================
[   11.128038][   T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   11.128252][   T11] Read of size 8 at addr ffff8880058680f8 by task kworker/u16:0/11
[   11.128449][   T11] 
[   11.128527][   T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1
[   11.128758][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.128981][   T11] Workqueue: netns cleanup_net
[   11.129126][   T11] Call Trace:
[   11.129228][   T11]  <TASK>
[   11.129300][   T11]  dump_stack_lvl+0x82/0xd0
[   11.129474][   T11]  print_address_description.constprop.0+0x2c/0x3b0
[   11.129646][   T11]  ? cleanup_net+0x932/0xa40
[   11.129808][   T11]  print_report+0xb4/0x270
[   11.129959][   T11]  ? kasan_addr_to_slab+0x25/0x80
[   11.130108][   T11]  kasan_report+0xbd/0xf0
[   11.130222][   T11]  ? cleanup_net+0x932/0xa40
[   11.130369][   T11]  cleanup_net+0x932/0xa40
[   11.130514][   T11]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   11.130662][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   11.130797][   T11]  ? trace_lock_acquire+0x148/0x1f0
[   11.130929][   T11]  ? lock_acquire+0x32/0xc0
[   11.131062][   T11]  ? process_one_work+0xe0b/0x16d0
[   11.131198][   T11]  process_one_work+0xe55/0x16d0
[   11.131332][   T11]  ? __pfx___lock_release+0x10/0x10
[   11.131470][   T11]  ? __pfx_process_one_work+0x10/0x10
[   11.131610][   T11]  ? assign_work+0x16c/0x240
[   11.131748][   T11]  worker_thread+0x58c/0xce0
[   11.131883][   T11]  ? __pfx_worker_thread+0x10/0x10
[   11.132018][   T11]  kthread+0x28a/0x350
[   11.132122][   T11]  ? __pfx_kthread+0x10/0x10
[   11.132254][   T11]  ret_from_fork+0x31/0x70
[   11.132386][   T11]  ? __pfx_kthread+0x10/0x10
[   11.132521][   T11]  ret_from_fork_asm+0x1a/0x30
[   11.132670][   T11]  </TASK>
[   11.132775][   T11] 
[   11.132851][   T11] Allocated by task 228:
[   11.132952][   T11]  kasan_save_stack+0x24/0x50
[   11.133095][   T11]  kasan_save_track+0x14/0x30
[   11.133225][   T11]  __kasan_slab_alloc+0x59/0x70
[   11.133361][   T11]  kmem_cache_alloc_noprof+0x10b/0x350
[   11.133510][   T11]  copy_net_ns+0xc6/0x340
[   11.133608][   T11]  create_new_namespaces+0x35f/0x920
[   11.133760][   T11]  unshare_nsproxy_namespaces+0x8d/0x130
[   11.133894][   T11]  ksys_unshare+0x2a9/0x660
[   11.134027][   T11]  __x64_sys_unshare+0x31/0x40
[   11.134157][   T11]  do_syscall_64+0xc1/0x1d0
[   11.134289][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   11.134501][   T11] 
[   11.134577][   T11] Freed by task 11:
[   11.134684][   T11]  kasan_save_stack+0x24/0x50
[   11.134834][   T11]  kasan_save_track+0x14/0x30
[   11.134981][   T11]  kasan_save_free_info+0x3b/0x60
[   11.135114][   T11]  __kasan_slab_free+0x38/0x50
[   11.135244][   T11]  kmem_cache_free+0xf8/0x330
[   11.135375][   T11]  cleanup_net+0x5a8/0xa40
[   11.135507][   T11]  process_one_work+0xe55/0x16d0
[   11.135658][   T11]  worker_thread+0x58c/0xce0
[   11.135789][   T11]  kthread+0x28a/0x350
[   11.135896][   T11]  ret_from_fork+0x31/0x70
[   11.136033][   T11]  ret_from_fork_asm+0x1a/0x30
[   11.136166][   T11] 
[   11.136234][   T11] The buggy address belongs to the object at ffff888005868040
[   11.136234][   T11]  which belongs to the cache net_namespace of size 5696
[   11.136588][   T11] The buggy address is located 184 bytes inside of
[   11.136588][   T11]  freed 5696-byte region [ffff888005868040, ffff888005869680)
[   11.136915][   T11] 
[   11.136984][   T11] The buggy address belongs to the physical page:
[   11.137141][   T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800586afc0 pfn:0x5868
[   11.137441][   T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   11.137638][   T11] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   11.137819][   T11] page_type: f5(slab)
[   11.137933][   T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.138165][   T11] raw: ffff88800586afc0 0000000000050002 00000001f5000000 0000000000000000
[   11.138390][   T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.138623][   T11] head: ffff88800586afc0 0000000000050002 00000001f5000000 0000000000000000
[   11.138913][   T11] head: 0080000000000003 ffffea0000161a01 ffffffffffffffff 0000000000000000
[   11.139144][   T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   11.139392][   T11] page dumped because: kasan: bad access detected
[   11.139557][   T11] 
[   11.139624][   T11] Memory state around the buggy address:
[   11.139760][   T11]  ffff888005867f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.139955][   T11]  ffff888005868000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   11.140178][   T11] >ffff888005868080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.140388][   T11]                                                                 ^
[   11.140592][   T11]  ffff888005868100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.140799][   T11]  ffff888005868180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.140994][   T11] ==================================================================
[   11.141238][   T11] Disabling lock debugging due to kernel taint