[   11.227891][   T11] ==================================================================
[   11.228240][   T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   11.228549][   T11] Read of size 8 at addr ffff88800a3400f8 by task kworker/u16:0/11
[   11.228846][   T11] 
[   11.228951][   T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1
[   11.229255][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.229506][   T11] Workqueue: netns cleanup_net
[   11.229734][   T11] Call Trace:
[   11.229884][   T11]  <TASK>
[   11.229990][   T11]  dump_stack_lvl+0x82/0xd0
[   11.230199][   T11]  print_address_description.constprop.0+0x2c/0x3b0
[   11.230453][   T11]  ? cleanup_net+0x932/0xa40
[   11.230654][   T11]  print_report+0xb4/0x270
[   11.230852][   T11]  ? kasan_addr_to_slab+0x25/0x80
[   11.231054][   T11]  kasan_report+0xbd/0xf0
[   11.231209][   T11]  ? cleanup_net+0x932/0xa40
[   11.231410][   T11]  cleanup_net+0x932/0xa40
[   11.231616][   T11]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   11.231820][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   11.232024][   T11]  ? trace_lock_acquire+0x148/0x1f0
[   11.232231][   T11]  ? lock_acquire+0x32/0xc0
[   11.232428][   T11]  ? process_one_work+0xe0b/0x16d0
[   11.232636][   T11]  process_one_work+0xe55/0x16d0
[   11.232858][   T11]  ? __pfx___lock_release+0x10/0x10
[   11.233060][   T11]  ? __pfx_process_one_work+0x10/0x10
[   11.233257][   T11]  ? assign_work+0x16c/0x240
[   11.233464][   T11]  worker_thread+0x58c/0xce0
[   11.233679][   T11]  ? __pfx_worker_thread+0x10/0x10
[   11.233885][   T11]  kthread+0x28a/0x350
[   11.234051][   T11]  ? __pfx_kthread+0x10/0x10
[   11.234265][   T11]  ret_from_fork+0x31/0x70
[   11.234474][   T11]  ? __pfx_kthread+0x10/0x10
[   11.234673][   T11]  ret_from_fork_asm+0x1a/0x30
[   11.234877][   T11]  </TASK>
[   11.235029][   T11] 
[   11.235123][   T11] Allocated by task 227:
[   11.235258][   T11]  kasan_save_stack+0x24/0x50
[   11.235468][   T11]  kasan_save_track+0x14/0x30
[   11.235671][   T11]  __kasan_slab_alloc+0x59/0x70
[   11.235879][   T11]  kmem_cache_alloc_noprof+0x10b/0x350
[   11.236087][   T11]  copy_net_ns+0xc6/0x340
[   11.236243][   T11]  create_new_namespaces+0x35f/0x920
[   11.236424][   T11]  unshare_nsproxy_namespaces+0x8d/0x130
[   11.236604][   T11]  ksys_unshare+0x2a9/0x660
[   11.236787][   T11]  __x64_sys_unshare+0x31/0x40
[   11.236980][   T11]  do_syscall_64+0xc1/0x1d0
[   11.237160][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   11.237390][   T11] 
[   11.237490][   T11] Freed by task 11:
[   11.237637][   T11]  kasan_save_stack+0x24/0x50
[   11.237835][   T11]  kasan_save_track+0x14/0x30
[   11.238024][   T11]  kasan_save_free_info+0x3b/0x60
[   11.238215][   T11]  __kasan_slab_free+0x38/0x50
[   11.238404][   T11]  kmem_cache_free+0xf8/0x330
[   11.238603][   T11]  cleanup_net+0x5a8/0xa40
[   11.238797][   T11]  process_one_work+0xe55/0x16d0
[   11.238993][   T11]  worker_thread+0x58c/0xce0
[   11.239174][   T11]  kthread+0x28a/0x350
[   11.239317][   T11]  ret_from_fork+0x31/0x70
[   11.239497][   T11]  ret_from_fork_asm+0x1a/0x30
[   11.239682][   T11] 
[   11.239774][   T11] The buggy address belongs to the object at ffff88800a340040
[   11.239774][   T11]  which belongs to the cache net_namespace of size 5696
[   11.240256][   T11] The buggy address is located 184 bytes inside of
[   11.240256][   T11]  freed 5696-byte region [ffff88800a340040, ffff88800a341680)
[   11.240693][   T11] 
[   11.240791][   T11] The buggy address belongs to the physical page:
[   11.241020][   T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a342fc0 pfn:0xa340
[   11.241391][   T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   11.241681][   T11] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   11.241924][   T11] page_type: f5(slab)
[   11.242074][   T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.242410][   T11] raw: ffff88800a342fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.242760][   T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.243100][   T11] head: ffff88800a342fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.243432][   T11] head: 0080000000000003 ffffea000028d001 ffffffffffffffff 0000000000000000
[   11.243763][   T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   11.244098][   T11] page dumped because: kasan: bad access detected
[   11.244349][   T11] 
[   11.244444][   T11] Memory state around the buggy address:
[   11.244628][   T11]  ffff88800a33ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.244902][   T11]  ffff88800a340000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   11.245174][   T11] >ffff88800a340080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.245445][   T11]                                                                 ^
[   11.245712][   T11]  ffff88800a340100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.245980][   T11]  ffff88800a340180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.246242][   T11] ==================================================================
[   11.246551][   T11] Disabling lock debugging due to kernel taint