[   11.048389][   T11] ==================================================================
[   11.048696][   T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90
[   11.048899][   T11] Read of size 8 at addr ffff88800a4400f8 by task kworker/u16:0/11
[   11.049103][   T11] 
[   11.049179][   T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1
[   11.049385][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.049554][   T11] Workqueue: netns cleanup_net
[   11.049696][   T11] Call Trace:
[   11.049807][   T11]  <TASK>
[   11.049879][   T11]  dump_stack_lvl+0x82/0xd0
[   11.050019][   T11]  print_address_description.constprop.0+0x2c/0x3b0
[   11.050190][   T11]  ? cleanup_net+0xa5d/0xb90
[   11.050327][   T11]  print_report+0xb4/0x270
[   11.050465][   T11]  ? kasan_addr_to_slab+0x25/0x80
[   11.050600][   T11]  kasan_report+0xbd/0xf0
[   11.050702][   T11]  ? cleanup_net+0xa5d/0xb90
[   11.050841][   T11]  cleanup_net+0xa5d/0xb90
[   11.050977][   T11]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   11.051115][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   11.051249][   T11]  ? trace_lock_acquire+0x148/0x1f0
[   11.051387][   T11]  ? lock_acquire+0x32/0xc0
[   11.051523][   T11]  ? process_one_work+0xe0b/0x16d0
[   11.051660][   T11]  process_one_work+0xe55/0x16d0
[   11.051796][   T11]  ? __pfx___lock_release+0x10/0x10
[   11.051935][   T11]  ? __pfx_process_one_work+0x10/0x10
[   11.052074][   T11]  ? assign_work+0x16c/0x240
[   11.052209][   T11]  worker_thread+0x58c/0xce0
[   11.052350][   T11]  ? __pfx_worker_thread+0x10/0x10
[   11.052487][   T11]  kthread+0x28a/0x350
[   11.052592][   T11]  ? __pfx_kthread+0x10/0x10
[   11.052729][   T11]  ret_from_fork+0x31/0x70
[   11.052864][   T11]  ? __pfx_kthread+0x10/0x10
[   11.053000][   T11]  ret_from_fork_asm+0x1a/0x30
[   11.053141][   T11]  </TASK>
[   11.053243][   T11] 
[   11.053312][   T11] Allocated by task 226:
[   11.053418][   T11]  kasan_save_stack+0x24/0x50
[   11.053556][   T11]  kasan_save_track+0x14/0x30
[   11.053693][   T11]  __kasan_slab_alloc+0x59/0x70
[   11.053828][   T11]  kmem_cache_alloc_noprof+0x10b/0x350
[   11.053963][   T11]  copy_net_ns+0xc6/0x540
[   11.054064][   T11]  create_new_namespaces+0x35f/0x920
[   11.054200][   T11]  unshare_nsproxy_namespaces+0x8a/0x1b0
[   11.054336][   T11]  ksys_unshare+0x2c4/0x6e0
[   11.054470][   T11]  __x64_sys_unshare+0x31/0x40
[   11.054606][   T11]  do_syscall_64+0xc1/0x1d0
[   11.054742][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   11.054910][   T11] 
[   11.054979][   T11] Freed by task 11:
[   11.055080][   T11]  kasan_save_stack+0x24/0x50
[   11.055219][   T11]  kasan_save_track+0x14/0x30
[   11.055353][   T11]  kasan_save_free_info+0x3b/0x60
[   11.055487][   T11]  __kasan_slab_free+0x38/0x50
[   11.055620][   T11]  kmem_cache_free+0xf8/0x330
[   11.055754][   T11]  cleanup_net+0x5a8/0xb90
[   11.055890][   T11]  process_one_work+0xe55/0x16d0
[   11.056025][   T11]  worker_thread+0x58c/0xce0
[   11.056159][   T11]  kthread+0x28a/0x350
[   11.056261][   T11]  ret_from_fork+0x31/0x70
[   11.056395][   T11]  ret_from_fork_asm+0x1a/0x30
[   11.056530][   T11] 
[   11.056598][   T11] The buggy address belongs to the object at ffff88800a440040
[   11.056598][   T11]  which belongs to the cache net_namespace of size 6528
[   11.056954][   T11] The buggy address is located 184 bytes inside of
[   11.056954][   T11]  freed 6528-byte region [ffff88800a440040, ffff88800a4419c0)
[   11.057279][   T11] 
[   11.057347][   T11] The buggy address belongs to the physical page:
[   11.057510][   T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a445140 pfn:0xa440
[   11.057791][   T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   11.057996][   T11] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   11.058166][   T11] page_type: f5(slab)
[   11.058272][   T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088
[   11.058511][   T11] raw: ffff88800a445140 0000000000040003 00000001f5000000 0000000000000000
[   11.058755][   T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088
[   11.058994][   T11] head: ffff88800a445140 0000000000040003 00000001f5000000 0000000000000000
[   11.059234][   T11] head: 0080000000000003 ffffea0000291001 ffffffffffffffff 0000000000000000
[   11.059472][   T11] head: ffff888000000008 0000000000000000 00000000ffffffff 0000000000000000
[   11.059718][   T11] page dumped because: kasan: bad access detected
[   11.059892][   T11] 
[   11.059961][   T11] Memory state around the buggy address:
[   11.060094][   T11]  ffff88800a43ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.060293][   T11]  ffff88800a440000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   11.060493][   T11] >ffff88800a440080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.060689][   T11]                                                                 ^
[   11.060882][   T11]  ffff88800a440100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.061088][   T11]  ffff88800a440180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.061283][   T11] ==================================================================
[   11.061503][   T11] Disabling lock debugging due to kernel taint