[   11.619364][   T11] ==================================================================
[   11.619658][   T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   11.619902][   T11] Read of size 8 at addr ffff888004d400f8 by task kworker/u16:0/11
[   11.620143][   T11] 
[   11.620234][   T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1
[   11.620493][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.620698][   T11] Workqueue: netns cleanup_net
[   11.620862][   T11] Call Trace:
[   11.620982][   T11]  <TASK>
[   11.621057][   T11]  dump_stack_lvl+0x82/0xd0
[   11.621239][   T11]  print_address_description.constprop.0+0x2c/0x3b0
[   11.621434][   T11]  ? cleanup_net+0x932/0xa40
[   11.621575][   T11]  print_report+0xb4/0x270
[   11.621740][   T11]  ? kasan_addr_to_slab+0x25/0x80
[   11.621902][   T11]  kasan_report+0xbd/0xf0
[   11.622020][   T11]  ? cleanup_net+0x932/0xa40
[   11.622162][   T11]  cleanup_net+0x932/0xa40
[   11.622314][   T11]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   11.622458][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   11.622604][   T11]  ? trace_lock_acquire+0x148/0x1f0
[   11.622745][   T11]  ? lock_acquire+0x32/0xc0
[   11.622893][   T11]  ? process_one_work+0xe0b/0x16d0
[   11.623047][   T11]  process_one_work+0xe55/0x16d0
[   11.623186][   T11]  ? __pfx___lock_release+0x10/0x10
[   11.623335][   T11]  ? __pfx_process_one_work+0x10/0x10
[   11.623482][   T11]  ? assign_work+0x16c/0x240
[   11.623622][   T11]  worker_thread+0x58c/0xce0
[   11.623775][   T11]  ? __pfx_worker_thread+0x10/0x10
[   11.623934][   T11]  kthread+0x28a/0x350
[   11.624048][   T11]  ? __pfx_kthread+0x10/0x10
[   11.624200][   T11]  ret_from_fork+0x31/0x70
[   11.624350][   T11]  ? __pfx_kthread+0x10/0x10
[   11.624499][   T11]  ret_from_fork_asm+0x1a/0x30
[   11.624646][   T11]  </TASK>
[   11.624770][   T11] 
[   11.624846][   T11] Allocated by task 226:
[   11.624958][   T11]  kasan_save_stack+0x24/0x50
[   11.625111][   T11]  kasan_save_track+0x14/0x30
[   11.625250][   T11]  __kasan_slab_alloc+0x59/0x70
[   11.625398][   T11]  kmem_cache_alloc_noprof+0x10b/0x350
[   11.625540][   T11]  copy_net_ns+0xc6/0x340
[   11.625651][   T11]  create_new_namespaces+0x35f/0x920
[   11.625811][   T11]  unshare_nsproxy_namespaces+0x8d/0x130
[   11.625963][   T11]  ksys_unshare+0x2a9/0x660
[   11.626118][   T11]  __x64_sys_unshare+0x31/0x40
[   11.626268][   T11]  do_syscall_64+0xc1/0x1d0
[   11.626415][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   11.626610][   T11] 
[   11.626681][   T11] Freed by task 11:
[   11.626787][   T11]  kasan_save_stack+0x24/0x50
[   11.626928][   T11]  kasan_save_track+0x14/0x30
[   11.627085][   T11]  kasan_save_free_info+0x3b/0x60
[   11.627226][   T11]  __kasan_slab_free+0x38/0x50
[   11.627402][   T11]  kmem_cache_free+0xf8/0x330
[   11.627551][   T11]  cleanup_net+0x5a8/0xa40
[   11.627695][   T11]  process_one_work+0xe55/0x16d0
[   11.627833][   T11]  worker_thread+0x58c/0xce0
[   11.627969][   T11]  kthread+0x28a/0x350
[   11.628081][   T11]  ret_from_fork+0x31/0x70
[   11.628240][   T11]  ret_from_fork_asm+0x1a/0x30
[   11.628397][   T11] 
[   11.628483][   T11] The buggy address belongs to the object at ffff888004d40040
[   11.628483][   T11]  which belongs to the cache net_namespace of size 5696
[   11.628877][   T11] The buggy address is located 184 bytes inside of
[   11.628877][   T11]  freed 5696-byte region [ffff888004d40040, ffff888004d41680)
[   11.629234][   T11] 
[   11.629317][   T11] The buggy address belongs to the physical page:
[   11.629496][   T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004d42fc0 pfn:0x4d40
[   11.629785][   T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   11.630009][   T11] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   11.630208][   T11] page_type: f5(slab)
[   11.630329][   T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.630597][   T11] raw: ffff888004d42fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.630862][   T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.631127][   T11] head: ffff888004d42fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.631401][   T11] head: 0080000000000003 ffffea0000135001 ffffffffffffffff 0000000000000000
[   11.631669][   T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   11.631959][   T11] page dumped because: kasan: bad access detected
[   11.632146][   T11] 
[   11.632225][   T11] Memory state around the buggy address:
[   11.632387][   T11]  ffff888004d3ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   11.632641][   T11]  ffff888004d40000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   11.632865][   T11] >ffff888004d40080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.633078][   T11]                                                                 ^
[   11.633286][   T11]  ffff888004d40100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.633490][   T11]  ffff888004d40180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.633703][   T11] ==================================================================
[   11.633946][   T11] Disabling lock debugging due to kernel taint