[   10.592207][   T65] ==================================================================
[   10.592469][   T65] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   10.592669][   T65] Read of size 8 at addr ffff8880098600f8 by task kworker/u16:1/65
[   10.592847][   T65] 
[   10.592911][   T65] CPU: 2 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1
[   10.593103][   T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   10.593256][   T65] Workqueue: netns cleanup_net
[   10.593398][   T65] Call Trace:
[   10.593497][   T65]  <TASK>
[   10.593563][   T65]  dump_stack_lvl+0x82/0xd0
[   10.593702][   T65]  print_address_description.constprop.0+0x2c/0x3b0
[   10.593858][   T65]  ? cleanup_net+0x932/0xa40
[   10.593983][   T65]  print_report+0xb4/0x270
[   10.594106][   T65]  ? kasan_addr_to_slab+0x25/0x80
[   10.594230][   T65]  kasan_report+0xbd/0xf0
[   10.594343][   T65]  ? cleanup_net+0x932/0xa40
[   10.594473][   T65]  cleanup_net+0x932/0xa40
[   10.594600][   T65]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   10.594729][   T65]  ? __pfx_cleanup_net+0x10/0x10
[   10.594851][   T65]  ? trace_lock_acquire+0x148/0x1f0
[   10.594975][   T65]  ? lock_acquire+0x32/0xc0
[   10.595100][   T65]  ? process_one_work+0xe0b/0x16d0
[   10.595235][   T65]  process_one_work+0xe55/0x16d0
[   10.595376][   T65]  ? __pfx___lock_release+0x10/0x10
[   10.595500][   T65]  ? __pfx_process_one_work+0x10/0x10
[   10.595630][   T65]  ? assign_work+0x16c/0x240
[   10.595755][   T65]  worker_thread+0x58c/0xce0
[   10.595879][   T65]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[   10.596034][   T65]  ? __pfx_worker_thread+0x10/0x10
[   10.596160][   T65]  ? __pfx_worker_thread+0x10/0x10
[   10.596290][   T65]  kthread+0x28a/0x350
[   10.596385][   T65]  ? __pfx_kthread+0x10/0x10
[   10.596511][   T65]  ret_from_fork+0x31/0x70
[   10.596640][   T65]  ? __pfx_kthread+0x10/0x10
[   10.596762][   T65]  ret_from_fork_asm+0x1a/0x30
[   10.596891][   T65]  </TASK>
[   10.596987][   T65] 
[   10.597050][   T65] Allocated by task 227:
[   10.597143][   T65]  kasan_save_stack+0x24/0x50
[   10.597276][   T65]  kasan_save_track+0x14/0x30
[   10.597406][   T65]  __kasan_slab_alloc+0x59/0x70
[   10.597529][   T65]  kmem_cache_alloc_noprof+0x10b/0x350
[   10.597658][   T65]  copy_net_ns+0xc6/0x340
[   10.597756][   T65]  create_new_namespaces+0x35f/0x920
[   10.597885][   T65]  unshare_nsproxy_namespaces+0x8d/0x130
[   10.598013][   T65]  ksys_unshare+0x2a9/0x660
[   10.598145][   T65]  __x64_sys_unshare+0x31/0x40
[   10.598289][   T65]  do_syscall_64+0xc1/0x1d0
[   10.598426][   T65]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   10.598578][   T65] 
[   10.598646][   T65] Freed by task 65:
[   10.598737][   T65]  kasan_save_stack+0x24/0x50
[   10.598860][   T65]  kasan_save_track+0x14/0x30
[   10.598985][   T65]  kasan_save_free_info+0x3b/0x60
[   10.599114][   T65]  __kasan_slab_free+0x38/0x50
[   10.599238][   T65]  kmem_cache_free+0xf8/0x330
[   10.599411][   T65]  cleanup_net+0x5a8/0xa40
[   10.599535][   T65]  process_one_work+0xe55/0x16d0
[   10.599662][   T65]  worker_thread+0x58c/0xce0
[   10.599787][   T65]  kthread+0x28a/0x350
[   10.599878][   T65]  ret_from_fork+0x31/0x70
[   10.600000][   T65]  ret_from_fork_asm+0x1a/0x30
[   10.600128][   T65] 
[   10.600191][   T65] The buggy address belongs to the object at ffff888009860040
[   10.600191][   T65]  which belongs to the cache net_namespace of size 5696
[   10.600515][   T65] The buggy address is located 184 bytes inside of
[   10.600515][   T65]  freed 5696-byte region [ffff888009860040, ffff888009861680)
[   10.600833][   T65] 
[   10.600902][   T65] The buggy address belongs to the physical page:
[   10.601060][   T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009862fc0 pfn:0x9860
[   10.601317][   T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   10.601497][   T65] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   10.601657][   T65] page_type: f5(slab)
[   10.601755][   T65] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   10.601994][   T65] raw: ffff888009862fc0 0000000000050002 00000001f5000000 0000000000000000
[   10.602217][   T65] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   10.602446][   T65] head: ffff888009862fc0 0000000000050002 00000001f5000000 0000000000000000
[   10.602665][   T65] head: 0080000000000003 ffffea0000261801 ffffffffffffffff 0000000000000000
[   10.602888][   T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   10.603100][   T65] page dumped because: kasan: bad access detected
[   10.603252][   T65] 
[   10.603336][   T65] Memory state around the buggy address:
[   10.603473][   T65]  ffff88800985ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   10.603685][   T65]  ffff888009860000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   10.603863][   T65] >ffff888009860080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.604040][   T65]                                                                 ^
[   10.604213][   T65]  ffff888009860100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.604405][   T65]  ffff888009860180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.604577][   T65] ==================================================================
[   10.604890][   T65] Disabling lock debugging due to kernel taint
[   10.867979][    C1] TCP: request_sock_TCPv6: Possible SYN flooding on port [2001:db8:254::1]:7010. Sending cookies.