[   10.045878][   T11] ==================================================================
[   10.046111][   T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   10.046315][   T11] Read of size 8 at addr ffff88800b1200f8 by task kworker/u16:0/11
[   10.046501][   T11] 
[   10.046573][   T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1
[   10.046778][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   10.046941][   T11] Workqueue: netns cleanup_net
[   10.047089][   T11] Call Trace:
[   10.047185][   T11]  <TASK>
[   10.047251][   T11]  dump_stack_lvl+0x82/0xd0
[   10.047391][   T11]  print_address_description.constprop.0+0x2c/0x3b0
[   10.047549][   T11]  ? cleanup_net+0x932/0xa40
[   10.047684][   T11]  print_report+0xb4/0x270
[   10.047819][   T11]  ? kasan_addr_to_slab+0x25/0x80
[   10.047954][   T11]  kasan_report+0xbd/0xf0
[   10.048064][   T11]  ? cleanup_net+0x932/0xa40
[   10.048207][   T11]  cleanup_net+0x932/0xa40
[   10.048330][   T11]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   10.048457][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   10.048589][   T11]  ? trace_lock_acquire+0x148/0x1f0
[   10.048713][   T11]  ? lock_acquire+0x32/0xc0
[   10.048846][   T11]  ? process_one_work+0xe0b/0x16d0
[   10.048974][   T11]  process_one_work+0xe55/0x16d0
[   10.049106][   T11]  ? __pfx___lock_release+0x10/0x10
[   10.049242][   T11]  ? __pfx_process_one_work+0x10/0x10
[   10.049367][   T11]  ? assign_work+0x16c/0x240
[   10.049497][   T11]  worker_thread+0x58c/0xce0
[   10.049633][   T11]  ? __pfx_worker_thread+0x10/0x10
[   10.049761][   T11]  kthread+0x28a/0x350
[   10.049857][   T11]  ? __pfx_kthread+0x10/0x10
[   10.049981][   T11]  ret_from_fork+0x31/0x70
[   10.050136][   T11]  ? __pfx_kthread+0x10/0x10
[   10.050301][   T11]  ret_from_fork_asm+0x1a/0x30
[   10.050427][   T11]  </TASK>
[   10.050521][   T11] 
[   10.050586][   T11] Allocated by task 225:
[   10.050681][   T11]  kasan_save_stack+0x24/0x50
[   10.050809][   T11]  kasan_save_track+0x14/0x30
[   10.050933][   T11]  __kasan_slab_alloc+0x59/0x70
[   10.051060][   T11]  kmem_cache_alloc_noprof+0x10b/0x350
[   10.051190][   T11]  copy_net_ns+0xc6/0x340
[   10.051282][   T11]  create_new_namespaces+0x35f/0x920
[   10.051408][   T11]  unshare_nsproxy_namespaces+0x8d/0x130
[   10.051531][   T11]  ksys_unshare+0x2a9/0x660
[   10.051664][   T11]  __x64_sys_unshare+0x31/0x40
[   10.051793][   T11]  do_syscall_64+0xc1/0x1d0
[   10.051970][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   10.052160][   T11] 
[   10.052224][   T11] Freed by task 11:
[   10.052315][   T11]  kasan_save_stack+0x24/0x50
[   10.052443][   T11]  kasan_save_track+0x14/0x30
[   10.052581][   T11]  kasan_save_free_info+0x3b/0x60
[   10.052722][   T11]  __kasan_slab_free+0x38/0x50
[   10.052846][   T11]  kmem_cache_free+0xf8/0x330
[   10.052967][   T11]  cleanup_net+0x5a8/0xa40
[   10.053100][   T11]  process_one_work+0xe55/0x16d0
[   10.053224][   T11]  worker_thread+0x58c/0xce0
[   10.053352][   T11]  kthread+0x28a/0x350
[   10.053445][   T11]  ret_from_fork+0x31/0x70
[   10.053571][   T11]  ret_from_fork_asm+0x1a/0x30
[   10.053698][   T11] 
[   10.053765][   T11] The buggy address belongs to the object at ffff88800b120040
[   10.053765][   T11]  which belongs to the cache net_namespace of size 5696
[   10.054089][   T11] The buggy address is located 184 bytes inside of
[   10.054089][   T11]  freed 5696-byte region [ffff88800b120040, ffff88800b121680)
[   10.054428][   T11] 
[   10.054492][   T11] The buggy address belongs to the physical page:
[   10.054693][   T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b122fc0 pfn:0xb120
[   10.054987][   T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   10.055232][   T11] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   10.055456][   T11] page_type: f5(slab)
[   10.055605][   T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   10.055948][   T11] raw: ffff88800b122fc0 0000000000050002 00000001f5000000 0000000000000000
[   10.056165][   T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   10.056383][   T11] head: ffff88800b122fc0 0000000000050002 00000001f5000000 0000000000000000
[   10.056608][   T11] head: 0080000000000003 ffffea00002c4801 ffffffffffffffff 0000000000000000
[   10.056833][   T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   10.057050][   T11] page dumped because: kasan: bad access detected
[   10.057206][   T11] 
[   10.057268][   T11] Memory state around the buggy address:
[   10.057387][   T11]  ffff88800b11ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   10.057572][   T11]  ffff88800b120000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   10.057756][   T11] >ffff88800b120080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.057940][   T11]                                                                 ^
[   10.058121][   T11]  ffff88800b120100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.058300][   T11]  ffff88800b120180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.058475][   T11] ==================================================================
[   10.058717][   T11] Disabling lock debugging due to kernel taint