[   11.069894][   T11] ==================================================================
[   11.070238][   T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   11.070548][   T11] Read of size 8 at addr ffff88800ac600f8 by task kworker/u16:0/11
[   11.070848][   T11] 
[   11.070952][   T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1
[   11.071266][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.071527][   T11] Workqueue: netns cleanup_net
[   11.071741][   T11] Call Trace:
[   11.071899][   T11]  <TASK>
[   11.072011][   T11]  dump_stack_lvl+0x82/0xd0
[   11.072213][   T11]  print_address_description.constprop.0+0x2c/0x3b0
[   11.072460][   T11]  ? cleanup_net+0x932/0xa40
[   11.072678][   T11]  print_report+0xb4/0x270
[   11.072889][   T11]  ? kasan_addr_to_slab+0x25/0x80
[   11.073103][   T11]  kasan_report+0xbd/0xf0
[   11.073262][   T11]  ? cleanup_net+0x932/0xa40
[   11.073473][   T11]  cleanup_net+0x932/0xa40
[   11.073686][   T11]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   11.073900][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   11.074107][   T11]  ? trace_lock_acquire+0x148/0x1f0
[   11.074308][   T11]  ? lock_acquire+0x32/0xc0
[   11.074507][   T11]  ? process_one_work+0xe0b/0x16d0
[   11.074715][   T11]  process_one_work+0xe55/0x16d0
[   11.074929][   T11]  ? __pfx___lock_release+0x10/0x10
[   11.075138][   T11]  ? __pfx_process_one_work+0x10/0x10
[   11.075353][   T11]  ? assign_work+0x16c/0x240
[   11.075569][   T11]  worker_thread+0x58c/0xce0
[   11.075784][   T11]  ? __pfx_worker_thread+0x10/0x10
[   11.075994][   T11]  kthread+0x28a/0x350
[   11.076152][   T11]  ? __pfx_kthread+0x10/0x10
[   11.076358][   T11]  ret_from_fork+0x31/0x70
[   11.076563][   T11]  ? __pfx_kthread+0x10/0x10
[   11.076749][   T11]  ret_from_fork_asm+0x1a/0x30
[   11.076894][   T11]  </TASK>
[   11.077003][   T11] 
[   11.077079][   T11] Allocated by task 227:
[   11.077191][   T11]  kasan_save_stack+0x24/0x50
[   11.077337][   T11]  kasan_save_track+0x14/0x30
[   11.077499][   T11]  __kasan_slab_alloc+0x59/0x70
[   11.077664][   T11]  kmem_cache_alloc_noprof+0x10b/0x350
[   11.077806][   T11]  copy_net_ns+0xc6/0x340
[   11.077913][   T11]  create_new_namespaces+0x35f/0x920
[   11.078055][   T11]  unshare_nsproxy_namespaces+0x8d/0x130
[   11.078193][   T11]  ksys_unshare+0x2a9/0x660
[   11.078335][   T11]  __x64_sys_unshare+0x31/0x40
[   11.078501][   T11]  do_syscall_64+0xc1/0x1d0
[   11.078707][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   11.078930][   T11] 
[   11.079003][   T11] Freed by task 11:
[   11.079107][   T11]  kasan_save_stack+0x24/0x50
[   11.079252][   T11]  kasan_save_track+0x14/0x30
[   11.079391][   T11]  kasan_save_free_info+0x3b/0x60
[   11.079537][   T11]  __kasan_slab_free+0x38/0x50
[   11.079684][   T11]  kmem_cache_free+0xf8/0x330
[   11.079826][   T11]  cleanup_net+0x5a8/0xa40
[   11.079967][   T11]  process_one_work+0xe55/0x16d0
[   11.080107][   T11]  worker_thread+0x58c/0xce0
[   11.080248][   T11]  kthread+0x28a/0x350
[   11.080356][   T11]  ret_from_fork+0x31/0x70
[   11.080503][   T11]  ret_from_fork_asm+0x1a/0x30
[   11.080643][   T11] 
[   11.080716][   T11] The buggy address belongs to the object at ffff88800ac60040
[   11.080716][   T11]  which belongs to the cache net_namespace of size 5696
[   11.081092][   T11] The buggy address is located 184 bytes inside of
[   11.081092][   T11]  freed 5696-byte region [ffff88800ac60040, ffff88800ac61680)
[   11.081427][   T11] 
[   11.081523][   T11] The buggy address belongs to the physical page:
[   11.081696][   T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ac62fc0 pfn:0xac60
[   11.081981][   T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   11.082193][   T11] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   11.082371][   T11] page_type: f5(slab)
[   11.082505][   T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.082875][   T11] raw: ffff88800ac62fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.083238][   T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.083604][   T11] head: ffff88800ac62fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.083972][   T11] head: 0080000000000003 ffffea00002b1801 ffffffffffffffff 0000000000000000
[   11.084342][   T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   11.084710][   T11] page dumped because: kasan: bad access detected
[   11.084965][   T11] 
[   11.085067][   T11] Memory state around the buggy address:
[   11.085263][   T11]  ffff88800ac5ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.085561][   T11]  ffff88800ac60000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   11.085864][   T11] >ffff88800ac60080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.086165][   T11]                                                                 ^
[   11.086459][   T11]  ffff88800ac60100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.086754][   T11]  ffff88800ac60180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.087005][   T11] ==================================================================
[   11.087237][   T11] Disabling lock debugging due to kernel taint