[   11.193812][   T67] ==================================================================
[   11.194047][   T67] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   11.194259][   T67] Read of size 8 at addr ffff88800b6000f8 by task kworker/u16:1/67
[   11.194458][   T67] 
[   11.194554][   T67] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1
[   11.194761][   T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.194954][   T67] Workqueue: netns cleanup_net
[   11.195106][   T67] Call Trace:
[   11.195220][   T67]  <TASK>
[   11.195288][   T67]  dump_stack_lvl+0x82/0xd0
[   11.195418][   T67]  print_address_description.constprop.0+0x2c/0x3b0
[   11.195573][   T67]  ? cleanup_net+0x932/0xa40
[   11.195726][   T67]  print_report+0xb4/0x270
[   11.195877][   T67]  ? kasan_addr_to_slab+0x25/0x80
[   11.196037][   T67]  kasan_report+0xbd/0xf0
[   11.196134][   T67]  ? cleanup_net+0x932/0xa40
[   11.196316][   T67]  cleanup_net+0x932/0xa40
[   11.196469][   T67]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   11.196604][   T67]  ? __pfx_cleanup_net+0x10/0x10
[   11.196729][   T67]  ? trace_lock_acquire+0x148/0x1f0
[   11.196880][   T67]  ? lock_acquire+0x32/0xc0
[   11.197038][   T67]  ? process_one_work+0xe0b/0x16d0
[   11.197191][   T67]  process_one_work+0xe55/0x16d0
[   11.197318][   T67]  ? __pfx___lock_release+0x10/0x10
[   11.197449][   T67]  ? __pfx_process_one_work+0x10/0x10
[   11.197578][   T67]  ? assign_work+0x16c/0x240
[   11.197710][   T67]  worker_thread+0x58c/0xce0
[   11.197834][   T67]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[   11.197986][   T67]  ? __pfx_worker_thread+0x10/0x10
[   11.198113][   T67]  ? __pfx_worker_thread+0x10/0x10
[   11.198251][   T67]  kthread+0x28a/0x350
[   11.198350][   T67]  ? __pfx_kthread+0x10/0x10
[   11.198487][   T67]  ret_from_fork+0x31/0x70
[   11.198611][   T67]  ? __pfx_kthread+0x10/0x10
[   11.198733][   T67]  ret_from_fork_asm+0x1a/0x30
[   11.198860][   T67]  </TASK>
[   11.198954][   T67] 
[   11.199017][   T67] Allocated by task 226:
[   11.199113][   T67]  kasan_save_stack+0x24/0x50
[   11.199259][   T67]  kasan_save_track+0x14/0x30
[   11.199382][   T67]  __kasan_slab_alloc+0x59/0x70
[   11.199506][   T67]  kmem_cache_alloc_noprof+0x10b/0x350
[   11.199661][   T67]  copy_net_ns+0xc6/0x340
[   11.199770][   T67]  create_new_namespaces+0x35f/0x920
[   11.199895][   T67]  unshare_nsproxy_namespaces+0x8d/0x130
[   11.200017][   T67]  ksys_unshare+0x2a9/0x660
[   11.200155][   T67]  __x64_sys_unshare+0x31/0x40
[   11.200293][   T67]  do_syscall_64+0xc1/0x1d0
[   11.200433][   T67]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   11.200586][   T67] 
[   11.200661][   T67] Freed by task 67:
[   11.200763][   T67]  kasan_save_stack+0x24/0x50
[   11.200889][   T67]  kasan_save_track+0x14/0x30
[   11.201019][   T67]  kasan_save_free_info+0x3b/0x60
[   11.201229][   T67]  __kasan_slab_free+0x38/0x50
[   11.201439][   T67]  kmem_cache_free+0xf8/0x330
[   11.201586][   T67]  cleanup_net+0x5a8/0xa40
[   11.201708][   T67]  process_one_work+0xe55/0x16d0
[   11.201833][   T67]  worker_thread+0x58c/0xce0
[   11.201955][   T67]  kthread+0x28a/0x350
[   11.202049][   T67]  ret_from_fork+0x31/0x70
[   11.202192][   T67]  ret_from_fork_asm+0x1a/0x30
[   11.202324][   T67] 
[   11.202421][   T67] The buggy address belongs to the object at ffff88800b600040
[   11.202421][   T67]  which belongs to the cache net_namespace of size 5696
[   11.202766][   T67] The buggy address is located 184 bytes inside of
[   11.202766][   T67]  freed 5696-byte region [ffff88800b600040, ffff88800b601680)
[   11.203075][   T67] 
[   11.203143][   T67] The buggy address belongs to the physical page:
[   11.203362][   T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b602fc0 pfn:0xb600
[   11.203647][   T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   11.203860][   T67] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   11.204029][   T67] page_type: f5(slab)
[   11.204134][   T67] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.204401][   T67] raw: ffff88800b602fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.204669][   T67] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.204908][   T67] head: ffff88800b602fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.205133][   T67] head: 0080000000000003 ffffea00002d8001 ffffffffffffffff 0000000000000000
[   11.205417][   T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   11.205635][   T67] page dumped because: kasan: bad access detected
[   11.205848][   T67] 
[   11.205928][   T67] Memory state around the buggy address:
[   11.206075][   T67]  ffff88800b5fff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.206315][   T67]  ffff88800b600000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   11.206561][   T67] >ffff88800b600080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.206824][   T67]                                                                 ^
[   11.207103][   T67]  ffff88800b600100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.207387][   T67]  ffff88800b600180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.207670][   T67] ==================================================================
[   11.207971][   T67] Disabling lock debugging due to kernel taint
[   11.521630][    C1] TCP: request_sock_TCP: Possible SYN flooding on port 10.0.254.1:7010. Sending cookies.