[   11.112802][   T65] ==================================================================
[   11.113057][   T65] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   11.113266][   T65] Read of size 8 at addr ffff888009f200f8 by task kworker/u16:1/65
[   11.113469][   T65] 
[   11.113540][   T65] CPU: 0 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1
[   11.113752][   T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.113974][   T65] Workqueue: netns cleanup_net
[   11.114130][   T65] Call Trace:
[   11.114244][   T65]  <TASK>
[   11.114336][   T65]  dump_stack_lvl+0x82/0xd0
[   11.114491][   T65]  print_address_description.constprop.0+0x2c/0x3b0
[   11.114678][   T65]  ? cleanup_net+0x932/0xa40
[   11.114836][   T65]  print_report+0xb4/0x270
[   11.115004][   T65]  ? kasan_addr_to_slab+0x25/0x80
[   11.115148][   T65]  kasan_report+0xbd/0xf0
[   11.115258][   T65]  ? cleanup_net+0x932/0xa40
[   11.115407][   T65]  cleanup_net+0x932/0xa40
[   11.115570][   T65]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   11.115718][   T65]  ? __pfx_cleanup_net+0x10/0x10
[   11.115863][   T65]  ? trace_lock_acquire+0x148/0x1f0
[   11.116007][   T65]  ? lock_acquire+0x32/0xc0
[   11.116168][   T65]  ? process_one_work+0xe0b/0x16d0
[   11.116312][   T65]  process_one_work+0xe55/0x16d0
[   11.116458][   T65]  ? __pfx___lock_release+0x10/0x10
[   11.116602][   T65]  ? __pfx_process_one_work+0x10/0x10
[   11.116747][   T65]  ? assign_work+0x16c/0x240
[   11.116891][   T65]  worker_thread+0x58c/0xce0
[   11.117033][   T65]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[   11.117215][   T65]  ? __pfx_worker_thread+0x10/0x10
[   11.117360][   T65]  ? __pfx_worker_thread+0x10/0x10
[   11.117501][   T65]  kthread+0x28a/0x350
[   11.117620][   T65]  ? __pfx_kthread+0x10/0x10
[   11.117776][   T65]  ret_from_fork+0x31/0x70
[   11.117922][   T65]  ? __pfx_kthread+0x10/0x10
[   11.118062][   T65]  ret_from_fork_asm+0x1a/0x30
[   11.118210][   T65]  </TASK>
[   11.118310][   T65] 
[   11.118405][   T65] Allocated by task 227:
[   11.118509][   T65]  kasan_save_stack+0x24/0x50
[   11.118651][   T65]  kasan_save_track+0x14/0x30
[   11.118795][   T65]  __kasan_slab_alloc+0x59/0x70
[   11.118937][   T65]  kmem_cache_alloc_noprof+0x10b/0x350
[   11.119101][   T65]  copy_net_ns+0xc6/0x340
[   11.119207][   T65]  create_new_namespaces+0x35f/0x920
[   11.119352][   T65]  unshare_nsproxy_namespaces+0x8d/0x130
[   11.119498][   T65]  ksys_unshare+0x2a9/0x660
[   11.119651][   T65]  __x64_sys_unshare+0x31/0x40
[   11.119793][   T65]  do_syscall_64+0xc1/0x1d0
[   11.119940][   T65]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   11.120137][   T65] 
[   11.120211][   T65] Freed by task 65:
[   11.120337][   T65]  kasan_save_stack+0x24/0x50
[   11.120483][   T65]  kasan_save_track+0x14/0x30
[   11.120623][   T65]  kasan_save_free_info+0x3b/0x60
[   11.120761][   T65]  __kasan_slab_free+0x38/0x50
[   11.120927][   T65]  kmem_cache_free+0xf8/0x330
[   11.121070][   T65]  cleanup_net+0x5a8/0xa40
[   11.121215][   T65]  process_one_work+0xe55/0x16d0
[   11.121377][   T65]  worker_thread+0x58c/0xce0
[   11.121526][   T65]  kthread+0x28a/0x350
[   11.121636][   T65]  ret_from_fork+0x31/0x70
[   11.121778][   T65]  ret_from_fork_asm+0x1a/0x30
[   11.121921][   T65] 
[   11.121993][   T65] The buggy address belongs to the object at ffff888009f20040
[   11.121993][   T65]  which belongs to the cache net_namespace of size 5696
[   11.122375][   T65] The buggy address is located 184 bytes inside of
[   11.122375][   T65]  freed 5696-byte region [ffff888009f20040, ffff888009f21680)
[   11.122734][   T65] 
[   11.122810][   T65] The buggy address belongs to the physical page:
[   11.122981][   T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009f22fc0 pfn:0x9f20
[   11.123241][   T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   11.123432][   T65] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   11.123604][   T65] page_type: f5(slab)
[   11.123721][   T65] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.123964][   T65] raw: ffff888009f22fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.124194][   T65] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.124444][   T65] head: ffff888009f22fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.124684][   T65] head: 0080000000000003 ffffea000027c801 ffffffffffffffff 0000000000000000
[   11.124929][   T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   11.125178][   T65] page dumped because: kasan: bad access detected
[   11.125357][   T65] 
[   11.125436][   T65] Memory state around the buggy address:
[   11.125574][   T65]  ffff888009f1ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   11.125785][   T65]  ffff888009f20000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   11.125984][   T65] >ffff888009f20080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.126195][   T65]                                                                 ^
[   11.126407][   T65]  ffff888009f20100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.126607][   T65]  ffff888009f20180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.126815][   T65] ==================================================================
[   11.127058][   T65] Disabling lock debugging due to kernel taint