[   11.651292][   T67] ==================================================================
[   11.651614][   T67] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   11.651893][   T67] Read of size 8 at addr ffff88800ac900f8 by task kworker/u16:1/67
[   11.652165][   T67] 
[   11.652273][   T67] CPU: 2 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1
[   11.652557][   T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.652812][   T67] Workqueue: netns cleanup_net
[   11.653030][   T67] Call Trace:
[   11.653202][   T67]  <TASK>
[   11.653308][   T67]  dump_stack_lvl+0x82/0xd0
[   11.653526][   T67]  print_address_description.constprop.0+0x2c/0x3b0
[   11.653778][   T67]  ? cleanup_net+0x932/0xa40
[   11.653991][   T67]  print_report+0xb4/0x270
[   11.654187][   T67]  ? kasan_addr_to_slab+0x25/0x80
[   11.654380][   T67]  kasan_report+0xbd/0xf0
[   11.654536][   T67]  ? cleanup_net+0x932/0xa40
[   11.654746][   T67]  cleanup_net+0x932/0xa40
[   11.654940][   T67]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   11.655140][   T67]  ? __pfx_cleanup_net+0x10/0x10
[   11.655326][   T67]  ? trace_lock_acquire+0x148/0x1f0
[   11.655526][   T67]  ? lock_acquire+0x32/0xc0
[   11.655713][   T67]  ? process_one_work+0xe0b/0x16d0
[   11.655912][   T67]  process_one_work+0xe55/0x16d0
[   11.656112][   T67]  ? __pfx___lock_release+0x10/0x10
[   11.656305][   T67]  ? __pfx_process_one_work+0x10/0x10
[   11.656504][   T67]  ? assign_work+0x16c/0x240
[   11.656693][   T67]  worker_thread+0x58c/0xce0
[   11.656886][   T67]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[   11.657142][   T67]  ? __pfx_worker_thread+0x10/0x10
[   11.657326][   T67]  ? __pfx_worker_thread+0x10/0x10
[   11.657514][   T67]  kthread+0x28a/0x350
[   11.657668][   T67]  ? __pfx_kthread+0x10/0x10
[   11.657873][   T67]  ret_from_fork+0x31/0x70
[   11.658063][   T67]  ? __pfx_kthread+0x10/0x10
[   11.658258][   T67]  ret_from_fork_asm+0x1a/0x30
[   11.658445][   T67]  </TASK>
[   11.658612][   T67] 
[   11.658704][   T67] Allocated by task 227:
[   11.658839][   T67]  kasan_save_stack+0x24/0x50
[   11.659049][   T67]  kasan_save_track+0x14/0x30
[   11.659240][   T67]  __kasan_slab_alloc+0x59/0x70
[   11.659446][   T67]  kmem_cache_alloc_noprof+0x10b/0x350
[   11.659638][   T67]  copy_net_ns+0xc6/0x340
[   11.659779][   T67]  create_new_namespaces+0x35f/0x920
[   11.659982][   T67]  unshare_nsproxy_namespaces+0x8d/0x130
[   11.660184][   T67]  ksys_unshare+0x2a9/0x660
[   11.660392][   T67]  __x64_sys_unshare+0x31/0x40
[   11.660592][   T67]  do_syscall_64+0xc1/0x1d0
[   11.660820][   T67]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   11.661061][   T67] 
[   11.661161][   T67] Freed by task 67:
[   11.661302][   T67]  kasan_save_stack+0x24/0x50
[   11.661489][   T67]  kasan_save_track+0x14/0x30
[   11.661671][   T67]  kasan_save_free_info+0x3b/0x60
[   11.661856][   T67]  __kasan_slab_free+0x38/0x50
[   11.662054][   T67]  kmem_cache_free+0xf8/0x330
[   11.662251][   T67]  cleanup_net+0x5a8/0xa40
[   11.662454][   T67]  process_one_work+0xe55/0x16d0
[   11.662645][   T67]  worker_thread+0x58c/0xce0
[   11.662842][   T67]  kthread+0x28a/0x350
[   11.662991][   T67]  ret_from_fork+0x31/0x70
[   11.663183][   T67]  ret_from_fork_asm+0x1a/0x30
[   11.663371][   T67] 
[   11.663470][   T67] The buggy address belongs to the object at ffff88800ac90040
[   11.663470][   T67]  which belongs to the cache net_namespace of size 5696
[   11.663989][   T67] The buggy address is located 184 bytes inside of
[   11.663989][   T67]  freed 5696-byte region [ffff88800ac90040, ffff88800ac91680)
[   11.664445][   T67] 
[   11.664542][   T67] The buggy address belongs to the physical page:
[   11.664791][   T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ac92fc0 pfn:0xac90
[   11.665187][   T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   11.665456][   T67] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   11.665708][   T67] page_type: f5(slab)
[   11.665852][   T67] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.666096][   T67] raw: ffff88800ac92fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.666340][   T67] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.666654][   T67] head: ffff88800ac92fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.667027][   T67] head: 0080000000000003 ffffea00002b2401 ffffffffffffffff 0000000000000000
[   11.667345][   T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   11.667688][   T67] page dumped because: kasan: bad access detected
[   11.667917][   T67] 
[   11.668051][   T67] Memory state around the buggy address:
[   11.668249][   T67]  ffff88800ac8ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   11.668537][   T67]  ffff88800ac90000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   11.668844][   T67] >ffff88800ac90080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.669144][   T67]                                                                 ^
[   11.669443][   T67]  ffff88800ac90100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.669716][   T67]  ffff88800ac90180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.670001][   T67] ==================================================================
[   11.670353][   T67] Disabling lock debugging due to kernel taint