[   11.754560][   T68] ==================================================================
[   11.754932][   T68] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   11.755258][   T68] Read of size 8 at addr ffff888009d500f8 by task kworker/u16:1/68
[   11.755617][   T68] 
[   11.755727][   T68] CPU: 2 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1
[   11.756027][   T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.756286][   T68] Workqueue: netns cleanup_net
[   11.756533][   T68] Call Trace:
[   11.756686][   T68]  <TASK>
[   11.756817][   T68]  dump_stack_lvl+0x82/0xd0
[   11.757055][   T68]  print_address_description.constprop.0+0x2c/0x3b0
[   11.757313][   T68]  ? cleanup_net+0x932/0xa40
[   11.757547][   T68]  print_report+0xb4/0x270
[   11.757747][   T68]  ? kasan_addr_to_slab+0x25/0x80
[   11.757951][   T68]  kasan_report+0xbd/0xf0
[   11.758110][   T68]  ? cleanup_net+0x932/0xa40
[   11.758323][   T68]  cleanup_net+0x932/0xa40
[   11.758521][   T68]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   11.758747][   T68]  ? __pfx_cleanup_net+0x10/0x10
[   11.758979][   T68]  ? trace_lock_acquire+0x148/0x1f0
[   11.759201][   T68]  ? lock_acquire+0x32/0xc0
[   11.759425][   T68]  ? process_one_work+0xe0b/0x16d0
[   11.759628][   T68]  process_one_work+0xe55/0x16d0
[   11.759867][   T68]  ? __pfx___lock_release+0x10/0x10
[   11.760074][   T68]  ? __pfx_process_one_work+0x10/0x10
[   11.760297][   T68]  ? assign_work+0x16c/0x240
[   11.760508][   T68]  worker_thread+0x58c/0xce0
[   11.760710][   T68]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[   11.760974][   T68]  ? __pfx_worker_thread+0x10/0x10
[   11.761195][   T68]  ? __pfx_worker_thread+0x10/0x10
[   11.761407][   T68]  kthread+0x28a/0x350
[   11.761569][   T68]  ? __pfx_kthread+0x10/0x10
[   11.761793][   T68]  ret_from_fork+0x31/0x70
[   11.762002][   T68]  ? __pfx_kthread+0x10/0x10
[   11.762215][   T68]  ret_from_fork_asm+0x1a/0x30
[   11.762433][   T68]  </TASK>
[   11.762598][   T68] 
[   11.762707][   T68] Allocated by task 227:
[   11.762886][   T68]  kasan_save_stack+0x24/0x50
[   11.763106][   T68]  kasan_save_track+0x14/0x30
[   11.763310][   T68]  __kasan_slab_alloc+0x59/0x70
[   11.763509][   T68]  kmem_cache_alloc_noprof+0x10b/0x350
[   11.763708][   T68]  copy_net_ns+0xc6/0x340
[   11.763862][   T68]  create_new_namespaces+0x35f/0x920
[   11.764064][   T68]  unshare_nsproxy_namespaces+0x8d/0x130
[   11.764380][   T68]  ksys_unshare+0x2a9/0x660
[   11.764575][   T68]  __x64_sys_unshare+0x31/0x40
[   11.764770][   T68]  do_syscall_64+0xc1/0x1d0
[   11.764968][   T68]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   11.765233][   T68] 
[   11.765343][   T68] Freed by task 68:
[   11.765489][   T68]  kasan_save_stack+0x24/0x50
[   11.765706][   T68]  kasan_save_track+0x14/0x30
[   11.765912][   T68]  kasan_save_free_info+0x3b/0x60
[   11.766127][   T68]  __kasan_slab_free+0x38/0x50
[   11.766323][   T68]  kmem_cache_free+0xf8/0x330
[   11.766525][   T68]  cleanup_net+0x5a8/0xa40
[   11.766723][   T68]  process_one_work+0xe55/0x16d0
[   11.766912][   T68]  worker_thread+0x58c/0xce0
[   11.767101][   T68]  kthread+0x28a/0x350
[   11.767252][   T68]  ret_from_fork+0x31/0x70
[   11.767459][   T68]  ret_from_fork_asm+0x1a/0x30
[   11.767662][   T68] 
[   11.767759][   T68] The buggy address belongs to the object at ffff888009d50040
[   11.767759][   T68]  which belongs to the cache net_namespace of size 5696
[   11.768259][   T68] The buggy address is located 184 bytes inside of
[   11.768259][   T68]  freed 5696-byte region [ffff888009d50040, ffff888009d51680)
[   11.768722][   T68] 
[   11.768832][   T68] The buggy address belongs to the physical page:
[   11.769068][   T68] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009d52fc0 pfn:0x9d50
[   11.769475][   T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   11.769812][   T68] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   11.770075][   T68] page_type: f5(slab)
[   11.770241][   T68] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.770629][   T68] raw: ffff888009d52fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.770968][   T68] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.771314][   T68] head: ffff888009d52fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.771643][   T68] head: 0080000000000003 ffffea0000275401 ffffffffffffffff 0000000000000000
[   11.771998][   T68] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   11.772337][   T68] page dumped because: kasan: bad access detected
[   11.772584][   T68] 
[   11.772681][   T68] Memory state around the buggy address:
[   11.772872][   T68]  ffff888009d4ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   11.773162][   T68]  ffff888009d50000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   11.773440][   T68] >ffff888009d50080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.773716][   T68]                                                                 ^
[   11.773990][   T68]  ffff888009d50100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.774272][   T68]  ffff888009d50180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.774541][   T68] ==================================================================
[   11.774902][   T68] Disabling lock debugging due to kernel taint