[   11.131664][   T11] ==================================================================
[   11.131938][   T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   11.132195][   T11] Read of size 8 at addr ffff88800b7280f8 by task kworker/u16:0/11
[   11.132429][   T11] 
[   11.132495][   T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1
[   11.132691][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.132857][   T11] Workqueue: netns cleanup_net
[   11.132993][   T11] Call Trace:
[   11.133099][   T11]  <TASK>
[   11.133193][   T11]  dump_stack_lvl+0x82/0xd0
[   11.133351][   T11]  print_address_description.constprop.0+0x2c/0x3b0
[   11.133516][   T11]  ? cleanup_net+0x932/0xa40
[   11.133661][   T11]  print_report+0xb4/0x270
[   11.133803][   T11]  ? kasan_addr_to_slab+0x25/0x80
[   11.133934][   T11]  kasan_report+0xbd/0xf0
[   11.134034][   T11]  ? cleanup_net+0x932/0xa40
[   11.134170][   T11]  cleanup_net+0x932/0xa40
[   11.134332][   T11]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   11.134463][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   11.134597][   T11]  ? trace_lock_acquire+0x148/0x1f0
[   11.134721][   T11]  ? lock_acquire+0x32/0xc0
[   11.134847][   T11]  ? process_one_work+0xe0b/0x16d0
[   11.134977][   T11]  process_one_work+0xe55/0x16d0
[   11.135118][   T11]  ? __pfx___lock_release+0x10/0x10
[   11.135250][   T11]  ? __pfx_process_one_work+0x10/0x10
[   11.135376][   T11]  ? assign_work+0x16c/0x240
[   11.135503][   T11]  worker_thread+0x58c/0xce0
[   11.135633][   T11]  ? __pfx_worker_thread+0x10/0x10
[   11.135758][   T11]  kthread+0x28a/0x350
[   11.135857][   T11]  ? __pfx_kthread+0x10/0x10
[   11.135983][   T11]  ret_from_fork+0x31/0x70
[   11.136120][   T11]  ? __pfx_kthread+0x10/0x10
[   11.136251][   T11]  ret_from_fork_asm+0x1a/0x30
[   11.136391][   T11]  </TASK>
[   11.136488][   T11] 
[   11.136562][   T11] Allocated by task 226:
[   11.136658][   T11]  kasan_save_stack+0x24/0x50
[   11.136787][   T11]  kasan_save_track+0x14/0x30
[   11.136911][   T11]  __kasan_slab_alloc+0x59/0x70
[   11.137039][   T11]  kmem_cache_alloc_noprof+0x10b/0x350
[   11.137181][   T11]  copy_net_ns+0xc6/0x340
[   11.137276][   T11]  create_new_namespaces+0x35f/0x920
[   11.137405][   T11]  unshare_nsproxy_namespaces+0x8d/0x130
[   11.137533][   T11]  ksys_unshare+0x2a9/0x660
[   11.137670][   T11]  __x64_sys_unshare+0x31/0x40
[   11.137804][   T11]  do_syscall_64+0xc1/0x1d0
[   11.137932][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   11.138091][   T11] 
[   11.138166][   T11] Freed by task 11:
[   11.138262][   T11]  kasan_save_stack+0x24/0x50
[   11.138389][   T11]  kasan_save_track+0x14/0x30
[   11.138515][   T11]  kasan_save_free_info+0x3b/0x60
[   11.138641][   T11]  __kasan_slab_free+0x38/0x50
[   11.138770][   T11]  kmem_cache_free+0xf8/0x330
[   11.138899][   T11]  cleanup_net+0x5a8/0xa40
[   11.139027][   T11]  process_one_work+0xe55/0x16d0
[   11.139170][   T11]  worker_thread+0x58c/0xce0
[   11.139298][   T11]  kthread+0x28a/0x350
[   11.139394][   T11]  ret_from_fork+0x31/0x70
[   11.139521][   T11]  ret_from_fork_asm+0x1a/0x30
[   11.139660][   T11] 
[   11.139738][   T11] The buggy address belongs to the object at ffff88800b728040
[   11.139738][   T11]  which belongs to the cache net_namespace of size 5696
[   11.140088][   T11] The buggy address is located 184 bytes inside of
[   11.140088][   T11]  freed 5696-byte region [ffff88800b728040, ffff88800b729680)
[   11.140452][   T11] 
[   11.140521][   T11] The buggy address belongs to the physical page:
[   11.140689][   T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b72afc0 pfn:0xb728
[   11.140958][   T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   11.141166][   T11] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   11.141330][   T11] page_type: f5(slab)
[   11.141434][   T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.141667][   T11] raw: ffff88800b72afc0 0000000000050002 00000001f5000000 0000000000000000
[   11.141893][   T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.142123][   T11] head: ffff88800b72afc0 0000000000050002 00000001f5000000 0000000000000000
[   11.142341][   T11] head: 0080000000000003 ffffea00002dca01 ffffffffffffffff 0000000000000000
[   11.142562][   T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   11.142778][   T11] page dumped because: kasan: bad access detected
[   11.142931][   T11] 
[   11.142996][   T11] Memory state around the buggy address:
[   11.143119][   T11]  ffff88800b727f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.143303][   T11]  ffff88800b728000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   11.143481][   T11] >ffff88800b728080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.143703][   T11]                                                                 ^
[   11.143892][   T11]  ffff88800b728100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.144120][   T11]  ffff88800b728180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.144393][   T11] ==================================================================
[   11.144663][   T11] Disabling lock debugging due to kernel taint
[   26.805816][  T226] unsigned-md5_ip (226) used greatest stack depth: 24368 bytes left