[   10.063594][   T11] ==================================================================
[   10.063859][   T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   10.064103][   T11] Read of size 8 at addr ffff888009db80f8 by task kworker/u16:0/11
[   10.064319][   T11] 
[   10.064402][   T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1
[   10.064645][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   10.064839][   T11] Workqueue: netns cleanup_net
[   10.065004][   T11] Call Trace:
[   10.065117][   T11]  <TASK>
[   10.065200][   T11]  dump_stack_lvl+0x82/0xd0
[   10.065365][   T11]  print_address_description.constprop.0+0x2c/0x3b0
[   10.065563][   T11]  ? cleanup_net+0x932/0xa40
[   10.065722][   T11]  print_report+0xb4/0x270
[   10.065880][   T11]  ? kasan_addr_to_slab+0x25/0x80
[   10.066039][   T11]  kasan_report+0xbd/0xf0
[   10.066159][   T11]  ? cleanup_net+0x932/0xa40
[   10.066317][   T11]  cleanup_net+0x932/0xa40
[   10.066468][   T11]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   10.066620][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   10.066771][   T11]  ? trace_lock_acquire+0x148/0x1f0
[   10.066922][   T11]  ? lock_acquire+0x32/0xc0
[   10.067078][   T11]  ? process_one_work+0xe0b/0x16d0
[   10.067232][   T11]  process_one_work+0xe55/0x16d0
[   10.067382][   T11]  ? __pfx___lock_release+0x10/0x10
[   10.067537][   T11]  ? __pfx_process_one_work+0x10/0x10
[   10.067692][   T11]  ? assign_work+0x16c/0x240
[   10.067851][   T11]  worker_thread+0x58c/0xce0
[   10.068007][   T11]  ? __pfx_worker_thread+0x10/0x10
[   10.068163][   T11]  kthread+0x28a/0x350
[   10.068283][   T11]  ? __pfx_kthread+0x10/0x10
[   10.068438][   T11]  ret_from_fork+0x31/0x70
[   10.068595][   T11]  ? __pfx_kthread+0x10/0x10
[   10.068749][   T11]  ret_from_fork_asm+0x1a/0x30
[   10.068915][   T11]  </TASK>
[   10.069038][   T11] 
[   10.069131][   T11] Allocated by task 227:
[   10.069243][   T11]  kasan_save_stack+0x24/0x50
[   10.069409][   T11]  kasan_save_track+0x14/0x30
[   10.069569][   T11]  __kasan_slab_alloc+0x59/0x70
[   10.069718][   T11]  kmem_cache_alloc_noprof+0x10b/0x350
[   10.069876][   T11]  copy_net_ns+0xc6/0x340
[   10.069982][   T11]  create_new_namespaces+0x35f/0x920
[   10.070128][   T11]  unshare_nsproxy_namespaces+0x8d/0x130
[   10.070275][   T11]  ksys_unshare+0x2a9/0x660
[   10.070415][   T11]  __x64_sys_unshare+0x31/0x40
[   10.070571][   T11]  do_syscall_64+0xc1/0x1d0
[   10.070721][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   10.070900][   T11] 
[   10.070977][   T11] Freed by task 11:
[   10.071092][   T11]  kasan_save_stack+0x24/0x50
[   10.071248][   T11]  kasan_save_track+0x14/0x30
[   10.071399][   T11]  kasan_save_free_info+0x3b/0x60
[   10.071553][   T11]  __kasan_slab_free+0x38/0x50
[   10.071702][   T11]  kmem_cache_free+0xf8/0x330
[   10.071849][   T11]  cleanup_net+0x5a8/0xa40
[   10.071997][   T11]  process_one_work+0xe55/0x16d0
[   10.072136][   T11]  worker_thread+0x58c/0xce0
[   10.072290][   T11]  kthread+0x28a/0x350
[   10.072420][   T11]  ret_from_fork+0x31/0x70
[   10.072570][   T11]  ret_from_fork_asm+0x1a/0x30
[   10.072728][   T11] 
[   10.072800][   T11] The buggy address belongs to the object at ffff888009db8040
[   10.072800][   T11]  which belongs to the cache net_namespace of size 5696
[   10.073196][   T11] The buggy address is located 184 bytes inside of
[   10.073196][   T11]  freed 5696-byte region [ffff888009db8040, ffff888009db9680)
[   10.073572][   T11] 
[   10.073644][   T11] The buggy address belongs to the physical page:
[   10.073815][   T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009dbafc0 pfn:0x9db8
[   10.074112][   T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   10.074334][   T11] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   10.074518][   T11] page_type: f5(slab)
[   10.074634][   T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   10.074902][   T11] raw: ffff888009dbafc0 0000000000050002 00000001f5000000 0000000000000000
[   10.075163][   T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   10.075435][   T11] head: ffff888009dbafc0 0000000000050002 00000001f5000000 0000000000000000
[   10.075695][   T11] head: 0080000000000003 ffffea0000276e01 ffffffffffffffff 0000000000000000
[   10.075941][   T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   10.076182][   T11] page dumped because: kasan: bad access detected
[   10.076360][   T11] 
[   10.076439][   T11] Memory state around the buggy address:
[   10.076589][   T11]  ffff888009db7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   10.076802][   T11]  ffff888009db8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   10.077018][   T11] >ffff888009db8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.077239][   T11]                                                                 ^
[   10.077441][   T11]  ffff888009db8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.077645][   T11]  ffff888009db8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.077851][   T11] ==================================================================
[   10.078086][   T11] Disabling lock debugging due to kernel taint
[   10.402153][    C0] TCP: request_sock_TCPv6: Possible SYN flooding on port [2001:db8:254::1]:7010. Sending cookies.
[   11.558628][  T227] rst_ipv6 (227) used greatest stack depth: 23792 bytes left