[   17.916558][   T11] ==================================================================
[   17.916807][   T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90
[   17.917018][   T11] Read of size 8 at addr ffff88800a7200f8 by task kworker/u16:0/11
[   17.917218][   T11] 
[   17.917289][   T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1
[   17.917487][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.917657][   T11] Workqueue: netns cleanup_net
[   17.917802][   T11] Call Trace:
[   17.917920][   T11]  <TASK>
[   17.917997][   T11]  dump_stack_lvl+0x82/0xd0
[   17.918138][   T11]  print_address_description.constprop.0+0x2c/0x3b0
[   17.918308][   T11]  ? cleanup_net+0xa5d/0xb90
[   17.918451][   T11]  print_report+0xb4/0x270
[   17.918595][   T11]  ? kasan_addr_to_slab+0x25/0x80
[   17.918746][   T11]  kasan_report+0xbd/0xf0
[   17.918860][   T11]  ? cleanup_net+0xa5d/0xb90
[   17.918998][   T11]  cleanup_net+0xa5d/0xb90
[   17.919146][   T11]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   17.919293][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   17.919428][   T11]  ? trace_lock_acquire+0x148/0x1f0
[   17.919569][   T11]  ? lock_acquire+0x32/0xc0
[   17.919707][   T11]  ? process_one_work+0xe0b/0x16d0
[   17.919849][   T11]  process_one_work+0xe55/0x16d0
[   17.919977][   T11]  ? __pfx___lock_release+0x10/0x10
[   17.920112][   T11]  ? __pfx_process_one_work+0x10/0x10
[   17.920251][   T11]  ? assign_work+0x16c/0x240
[   17.920387][   T11]  worker_thread+0x58c/0xce0
[   17.920529][   T11]  ? __pfx_worker_thread+0x10/0x10
[   17.920663][   T11]  kthread+0x28a/0x350
[   17.920768][   T11]  ? __pfx_kthread+0x10/0x10
[   17.920909][   T11]  ret_from_fork+0x31/0x70
[   17.921044][   T11]  ? __pfx_kthread+0x10/0x10
[   17.921183][   T11]  ret_from_fork_asm+0x1a/0x30
[   17.921323][   T11]  </TASK>
[   17.921424][   T11] 
[   17.921499][   T11] Allocated by task 486:
[   17.921608][   T11]  kasan_save_stack+0x24/0x50
[   17.921748][   T11]  kasan_save_track+0x14/0x30
[   17.921898][   T11]  __kasan_slab_alloc+0x59/0x70
[   17.922037][   T11]  kmem_cache_alloc_noprof+0x10b/0x350
[   17.922190][   T11]  copy_net_ns+0xc6/0x540
[   17.922298][   T11]  create_new_namespaces+0x35f/0x920
[   17.922449][   T11]  unshare_nsproxy_namespaces+0x8a/0x1b0
[   17.922605][   T11]  ksys_unshare+0x2c4/0x6e0
[   17.922755][   T11]  __x64_sys_unshare+0x31/0x40
[   17.922904][   T11]  do_syscall_64+0xc1/0x1d0
[   17.923060][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   17.923251][   T11] 
[   17.923328][   T11] Freed by task 11:
[   17.923431][   T11]  kasan_save_stack+0x24/0x50
[   17.923563][   T11]  kasan_save_track+0x14/0x30
[   17.923702][   T11]  kasan_save_free_info+0x3b/0x60
[   17.923846][   T11]  __kasan_slab_free+0x38/0x50
[   17.923979][   T11]  kmem_cache_free+0xf8/0x330
[   17.924118][   T11]  cleanup_net+0x5a8/0xb90
[   17.924254][   T11]  process_one_work+0xe55/0x16d0
[   17.924390][   T11]  worker_thread+0x58c/0xce0
[   17.924524][   T11]  kthread+0x28a/0x350
[   17.924625][   T11]  ret_from_fork+0x31/0x70
[   17.924758][   T11]  ret_from_fork_asm+0x1a/0x30
[   17.924905][   T11] 
[   17.924973][   T11] The buggy address belongs to the object at ffff88800a720040
[   17.924973][   T11]  which belongs to the cache net_namespace of size 6528
[   17.925326][   T11] The buggy address is located 184 bytes inside of
[   17.925326][   T11]  freed 6528-byte region [ffff88800a720040, ffff88800a7219c0)
[   17.925656][   T11] 
[   17.925727][   T11] The buggy address belongs to the physical page:
[   17.925900][   T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa720
[   17.926139][   T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   17.926346][   T11] flags: 0x80000000000040(head|node=0|zone=1)
[   17.926523][   T11] page_type: f5(slab)
[   17.926634][   T11] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8
[   17.926872][   T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000
[   17.927116][   T11] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8
[   17.927355][   T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000
[   17.927597][   T11] head: 0080000000000003 ffffea000029c801 ffffffffffffffff 0000000000000000
[   17.927840][   T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   17.928083][   T11] page dumped because: kasan: bad access detected
[   17.928250][   T11] 
[   17.928318][   T11] Memory state around the buggy address:
[   17.928451][   T11]  ffff88800a71ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   17.928667][   T11]  ffff88800a720000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   17.928878][   T11] >ffff88800a720080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   17.929112][   T11]                                                                 ^
[   17.929328][   T11]  ffff88800a720100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   17.929544][   T11]  ffff88800a720180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   17.929762][   T11] ==================================================================
[   17.929996][   T11] Disabling lock debugging due to kernel taint