[   11.671864][   T66] ==================================================================
[   11.672199][   T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   11.672494][   T66] Read of size 8 at addr ffff88800b4300f8 by task kworker/u16:1/66
[   11.672758][   T66] 
[   11.672859][   T66] CPU: 1 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1
[   11.673165][   T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.673405][   T66] Workqueue: netns cleanup_net
[   11.673604][   T66] Call Trace:
[   11.673747][   T66]  <TASK>
[   11.673837][   T66]  dump_stack_lvl+0x82/0xd0
[   11.674041][   T66]  print_address_description.constprop.0+0x2c/0x3b0
[   11.674298][   T66]  ? cleanup_net+0x932/0xa40
[   11.674511][   T66]  print_report+0xb4/0x270
[   11.674703][   T66]  ? kasan_addr_to_slab+0x25/0x80
[   11.674899][   T66]  kasan_report+0xbd/0xf0
[   11.675043][   T66]  ? cleanup_net+0x932/0xa40
[   11.675252][   T66]  cleanup_net+0x932/0xa40
[   11.675457][   T66]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   11.675657][   T66]  ? __pfx_cleanup_net+0x10/0x10
[   11.675849][   T66]  ? trace_lock_acquire+0x148/0x1f0
[   11.676033][   T66]  ? lock_acquire+0x32/0xc0
[   11.676234][   T66]  ? process_one_work+0xe0b/0x16d0
[   11.676436][   T66]  process_one_work+0xe55/0x16d0
[   11.676688][   T66]  ? __pfx___lock_release+0x10/0x10
[   11.676904][   T66]  ? __pfx_process_one_work+0x10/0x10
[   11.677116][   T66]  ? assign_work+0x16c/0x240
[   11.677310][   T66]  worker_thread+0x58c/0xce0
[   11.677511][   T66]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[   11.677762][   T66]  ? __pfx_worker_thread+0x10/0x10
[   11.678010][   T66]  ? __pfx_worker_thread+0x10/0x10
[   11.678229][   T66]  kthread+0x28a/0x350
[   11.678397][   T66]  ? __pfx_kthread+0x10/0x10
[   11.678615][   T66]  ret_from_fork+0x31/0x70
[   11.678830][   T66]  ? __pfx_kthread+0x10/0x10
[   11.679055][   T66]  ret_from_fork_asm+0x1a/0x30
[   11.679275][   T66]  </TASK>
[   11.679440][   T66] 
[   11.679554][   T66] Allocated by task 228:
[   11.679710][   T66]  kasan_save_stack+0x24/0x50
[   11.679927][   T66]  kasan_save_track+0x14/0x30
[   11.680147][   T66]  __kasan_slab_alloc+0x59/0x70
[   11.680366][   T66]  kmem_cache_alloc_noprof+0x10b/0x350
[   11.680593][   T66]  copy_net_ns+0xc6/0x340
[   11.680757][   T66]  create_new_namespaces+0x35f/0x920
[   11.680957][   T66]  unshare_nsproxy_namespaces+0x8d/0x130
[   11.681175][   T66]  ksys_unshare+0x2a9/0x660
[   11.681392][   T66]  __x64_sys_unshare+0x31/0x40
[   11.681599][   T66]  do_syscall_64+0xc1/0x1d0
[   11.681806][   T66]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   11.682070][   T66] 
[   11.682177][   T66] Freed by task 66:
[   11.682336][   T66]  kasan_save_stack+0x24/0x50
[   11.682554][   T66]  kasan_save_track+0x14/0x30
[   11.682766][   T66]  kasan_save_free_info+0x3b/0x60
[   11.682984][   T66]  __kasan_slab_free+0x38/0x50
[   11.683194][   T66]  kmem_cache_free+0xf8/0x330
[   11.683406][   T66]  cleanup_net+0x5a8/0xa40
[   11.683613][   T66]  process_one_work+0xe55/0x16d0
[   11.683815][   T66]  worker_thread+0x58c/0xce0
[   11.684025][   T66]  kthread+0x28a/0x350
[   11.684188][   T66]  ret_from_fork+0x31/0x70
[   11.684399][   T66]  ret_from_fork_asm+0x1a/0x30
[   11.684612][   T66] 
[   11.684724][   T66] The buggy address belongs to the object at ffff88800b430040
[   11.684724][   T66]  which belongs to the cache net_namespace of size 5696
[   11.685272][   T66] The buggy address is located 184 bytes inside of
[   11.685272][   T66]  freed 5696-byte region [ffff88800b430040, ffff88800b431680)
[   11.685802][   T66] 
[   11.685913][   T66] The buggy address belongs to the physical page:
[   11.686174][   T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b432fc0 pfn:0xb430
[   11.686605][   T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   11.686922][   T66] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   11.687198][   T66] page_type: f5(slab)
[   11.687373][   T66] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.687746][   T66] raw: ffff88800b432fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.688122][   T66] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.688495][   T66] head: ffff88800b432fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.688874][   T66] head: 0080000000000003 ffffea00002d0c01 ffffffffffffffff 0000000000000000
[   11.689237][   T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   11.689600][   T66] page dumped because: kasan: bad access detected
[   11.689861][   T66] 
[   11.689969][   T66] Memory state around the buggy address:
[   11.690184][   T66]  ffff88800b42ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.690487][   T66]  ffff88800b430000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   11.690790][   T66] >ffff88800b430080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.691094][   T66]                                                                 ^
[   11.691399][   T66]  ffff88800b430100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.691715][   T66]  ffff88800b430180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.692021][   T66] ==================================================================
[   11.692390][   T66] Disabling lock debugging due to kernel taint
[   12.281139][  T228] self-connect_ip (228) used greatest stack depth: 24168 bytes left