[   10.592065][   T68] ==================================================================
[   10.592313][   T68] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   10.592515][   T68] Read of size 8 at addr ffff88800a6b00f8 by task kworker/u16:1/68
[   10.592758][   T68] 
[   10.592833][   T68] CPU: 0 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1
[   10.593077][   T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   10.593257][   T68] Workqueue: netns cleanup_net
[   10.593410][   T68] Call Trace:
[   10.593515][   T68]  <TASK>
[   10.593590][   T68]  dump_stack_lvl+0x82/0xd0
[   10.593739][   T68]  print_address_description.constprop.0+0x2c/0x3b0
[   10.593917][   T68]  ? cleanup_net+0x932/0xa40
[   10.594055][   T68]  print_report+0xb4/0x270
[   10.594193][   T68]  ? kasan_addr_to_slab+0x25/0x80
[   10.594332][   T68]  kasan_report+0xbd/0xf0
[   10.594443][   T68]  ? cleanup_net+0x932/0xa40
[   10.594604][   T68]  cleanup_net+0x932/0xa40
[   10.594745][   T68]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   10.594889][   T68]  ? __pfx_cleanup_net+0x10/0x10
[   10.595023][   T68]  ? trace_lock_acquire+0x148/0x1f0
[   10.595162][   T68]  ? lock_acquire+0x32/0xc0
[   10.595301][   T68]  ? process_one_work+0xe0b/0x16d0
[   10.595445][   T68]  process_one_work+0xe55/0x16d0
[   10.595587][   T68]  ? __pfx___lock_release+0x10/0x10
[   10.595753][   T68]  ? __pfx_process_one_work+0x10/0x10
[   10.595895][   T68]  ? assign_work+0x16c/0x240
[   10.596037][   T68]  worker_thread+0x58c/0xce0
[   10.596171][   T68]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[   10.596344][   T68]  ? __pfx_worker_thread+0x10/0x10
[   10.596482][   T68]  ? __pfx_worker_thread+0x10/0x10
[   10.596618][   T68]  kthread+0x28a/0x350
[   10.596749][   T68]  ? __pfx_kthread+0x10/0x10
[   10.596890][   T68]  ret_from_fork+0x31/0x70
[   10.597030][   T68]  ? __pfx_kthread+0x10/0x10
[   10.597168][   T68]  ret_from_fork_asm+0x1a/0x30
[   10.597314][   T68]  </TASK>
[   10.597422][   T68] 
[   10.597497][   T68] Allocated by task 226:
[   10.597603][   T68]  kasan_save_stack+0x24/0x50
[   10.597742][   T68]  kasan_save_track+0x14/0x30
[   10.597890][   T68]  __kasan_slab_alloc+0x59/0x70
[   10.598054][   T68]  kmem_cache_alloc_noprof+0x10b/0x350
[   10.598196][   T68]  copy_net_ns+0xc6/0x340
[   10.598301][   T68]  create_new_namespaces+0x35f/0x920
[   10.598469][   T68]  unshare_nsproxy_namespaces+0x8d/0x130
[   10.598608][   T68]  ksys_unshare+0x2a9/0x660
[   10.598744][   T68]  __x64_sys_unshare+0x31/0x40
[   10.598884][   T68]  do_syscall_64+0xc1/0x1d0
[   10.599034][   T68]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   10.599210][   T68] 
[   10.599281][   T68] Freed by task 68:
[   10.599390][   T68]  kasan_save_stack+0x24/0x50
[   10.599537][   T68]  kasan_save_track+0x14/0x30
[   10.599672][   T68]  kasan_save_free_info+0x3b/0x60
[   10.599813][   T68]  __kasan_slab_free+0x38/0x50
[   10.599960][   T68]  kmem_cache_free+0xf8/0x330
[   10.600099][   T68]  cleanup_net+0x5a8/0xa40
[   10.600252][   T68]  process_one_work+0xe55/0x16d0
[   10.600388][   T68]  worker_thread+0x58c/0xce0
[   10.600524][   T68]  kthread+0x28a/0x350
[   10.600634][   T68]  ret_from_fork+0x31/0x70
[   10.600792][   T68]  ret_from_fork_asm+0x1a/0x30
[   10.600928][   T68] 
[   10.600999][   T68] The buggy address belongs to the object at ffff88800a6b0040
[   10.600999][   T68]  which belongs to the cache net_namespace of size 5696
[   10.601389][   T68] The buggy address is located 184 bytes inside of
[   10.601389][   T68]  freed 5696-byte region [ffff88800a6b0040, ffff88800a6b1680)
[   10.601725][   T68] 
[   10.601796][   T68] The buggy address belongs to the physical page:
[   10.601972][   T68] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a6b2fc0 pfn:0xa6b0
[   10.602256][   T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   10.602471][   T68] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   10.602649][   T68] page_type: f5(slab)
[   10.602768][   T68] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   10.603034][   T68] raw: ffff88800a6b2fc0 0000000000050002 00000001f5000000 0000000000000000
[   10.603282][   T68] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   10.603544][   T68] head: ffff88800a6b2fc0 0000000000050002 00000001f5000000 0000000000000000
[   10.603792][   T68] head: 0080000000000003 ffffea000029ac01 ffffffffffffffff 0000000000000000
[   10.604042][   T68] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   10.604296][   T68] page dumped because: kasan: bad access detected
[   10.604474][   T68] 
[   10.604566][   T68] Memory state around the buggy address:
[   10.604707][   T68]  ffff88800a6aff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   10.604914][   T68]  ffff88800a6b0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   10.605122][   T68] >ffff88800a6b0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.605340][   T68]                                                                 ^
[   10.605574][   T68]  ffff88800a6b0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.605774][   T68]  ffff88800a6b0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.605958][   T68] ==================================================================
[   10.606177][   T68] Disabling lock debugging due to kernel taint