[   10.938292][   T11] ==================================================================
[   10.938536][   T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   10.938737][   T11] Read of size 8 at addr ffff88800b7780f8 by task kworker/u16:0/11
[   10.938922][   T11] 
[   10.938987][   T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1
[   10.939182][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   10.939362][   T11] Workqueue: netns cleanup_net
[   10.939496][   T11] Call Trace:
[   10.939598][   T11]  <TASK>
[   10.939666][   T11]  dump_stack_lvl+0x82/0xd0
[   10.939807][   T11]  print_address_description.constprop.0+0x2c/0x3b0
[   10.939981][   T11]  ? cleanup_net+0x932/0xa40
[   10.940108][   T11]  print_report+0xb4/0x270
[   10.940236][   T11]  ? kasan_addr_to_slab+0x25/0x80
[   10.940367][   T11]  kasan_report+0xbd/0xf0
[   10.940464][   T11]  ? cleanup_net+0x932/0xa40
[   10.940611][   T11]  cleanup_net+0x932/0xa40
[   10.940739][   T11]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   10.940881][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   10.941008][   T11]  ? trace_lock_acquire+0x148/0x1f0
[   10.941135][   T11]  ? lock_acquire+0x32/0xc0
[   10.941272][   T11]  ? process_one_work+0xe0b/0x16d0
[   10.941419][   T11]  process_one_work+0xe55/0x16d0
[   10.941548][   T11]  ? __pfx___lock_release+0x10/0x10
[   10.941693][   T11]  ? __pfx_process_one_work+0x10/0x10
[   10.941820][   T11]  ? assign_work+0x16c/0x240
[   10.941948][   T11]  worker_thread+0x58c/0xce0
[   10.942076][   T11]  ? __pfx_worker_thread+0x10/0x10
[   10.942221][   T11]  kthread+0x28a/0x350
[   10.942320][   T11]  ? __pfx_kthread+0x10/0x10
[   10.942449][   T11]  ret_from_fork+0x31/0x70
[   10.942573][   T11]  ? __pfx_kthread+0x10/0x10
[   10.942698][   T11]  ret_from_fork_asm+0x1a/0x30
[   10.942852][   T11]  </TASK>
[   10.942956][   T11] 
[   10.943022][   T11] Allocated by task 226:
[   10.943118][   T11]  kasan_save_stack+0x24/0x50
[   10.943244][   T11]  kasan_save_track+0x14/0x30
[   10.943364][   T11]  __kasan_slab_alloc+0x59/0x70
[   10.943490][   T11]  kmem_cache_alloc_noprof+0x10b/0x350
[   10.943645][   T11]  copy_net_ns+0xc6/0x340
[   10.943740][   T11]  create_new_namespaces+0x35f/0x920
[   10.943865][   T11]  unshare_nsproxy_namespaces+0x8d/0x130
[   10.943998][   T11]  ksys_unshare+0x2a9/0x660
[   10.944126][   T11]  __x64_sys_unshare+0x31/0x40
[   10.944247][   T11]  do_syscall_64+0xc1/0x1d0
[   10.944370][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   10.944547][   T11] 
[   10.944611][   T11] Freed by task 11:
[   10.944703][   T11]  kasan_save_stack+0x24/0x50
[   10.944826][   T11]  kasan_save_track+0x14/0x30
[   10.944958][   T11]  kasan_save_free_info+0x3b/0x60
[   10.945085][   T11]  __kasan_slab_free+0x38/0x50
[   10.945207][   T11]  kmem_cache_free+0xf8/0x330
[   10.945332][   T11]  cleanup_net+0x5a8/0xa40
[   10.945459][   T11]  process_one_work+0xe55/0x16d0
[   10.945594][   T11]  worker_thread+0x58c/0xce0
[   10.945713][   T11]  kthread+0x28a/0x350
[   10.945808][   T11]  ret_from_fork+0x31/0x70
[   10.945946][   T11]  ret_from_fork_asm+0x1a/0x30
[   10.946076][   T11] 
[   10.946140][   T11] The buggy address belongs to the object at ffff88800b778040
[   10.946140][   T11]  which belongs to the cache net_namespace of size 5696
[   10.946493][   T11] The buggy address is located 184 bytes inside of
[   10.946493][   T11]  freed 5696-byte region [ffff88800b778040, ffff88800b779680)
[   10.946787][   T11] 
[   10.946869][   T11] The buggy address belongs to the physical page:
[   10.947038][   T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b77afc0 pfn:0xb778
[   10.947286][   T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   10.947489][   T11] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   10.947652][   T11] page_type: f5(slab)
[   10.947759][   T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   10.947987][   T11] raw: ffff88800b77afc0 0000000000050002 00000001f5000000 0000000000000000
[   10.948202][   T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   10.948427][   T11] head: ffff88800b77afc0 0000000000050002 00000001f5000000 0000000000000000
[   10.948643][   T11] head: 0080000000000003 ffffea00002dde01 ffffffffffffffff 0000000000000000
[   10.948892][   T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   10.949106][   T11] page dumped because: kasan: bad access detected
[   10.949260][   T11] 
[   10.949322][   T11] Memory state around the buggy address:
[   10.949455][   T11]  ffff88800b777f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   10.949641][   T11]  ffff88800b778000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   10.949826][   T11] >ffff88800b778080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.950004][   T11]                                                                 ^
[   10.950179][   T11]  ffff88800b778100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.950359][   T11]  ffff88800b778180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.950540][   T11] ==================================================================
[   10.950740][   T11] Disabling lock debugging due to kernel taint
[   11.262691][    C2] TCP: request_sock_TCP: Possible SYN flooding on port 10.0.254.1:7010. Sending cookies.