[   11.353685][   T11] ==================================================================
[   11.353931][   T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   11.354133][   T11] Read of size 8 at addr ffff88800b1200f8 by task kworker/u16:0/11
[   11.354321][   T11] 
[   11.354389][   T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1
[   11.354615][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.354790][   T11] Workqueue: netns cleanup_net
[   11.354937][   T11] Call Trace:
[   11.355035][   T11]  <TASK>
[   11.355107][   T11]  dump_stack_lvl+0x82/0xd0
[   11.355247][   T11]  print_address_description.constprop.0+0x2c/0x3b0
[   11.355417][   T11]  ? cleanup_net+0x932/0xa40
[   11.355555][   T11]  print_report+0xb4/0x270
[   11.355698][   T11]  ? kasan_addr_to_slab+0x25/0x80
[   11.355823][   T11]  kasan_report+0xbd/0xf0
[   11.355922][   T11]  ? cleanup_net+0x932/0xa40
[   11.356060][   T11]  cleanup_net+0x932/0xa40
[   11.356187][   T11]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   11.356316][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   11.356450][   T11]  ? trace_lock_acquire+0x148/0x1f0
[   11.356580][   T11]  ? lock_acquire+0x32/0xc0
[   11.356703][   T11]  ? process_one_work+0xe0b/0x16d0
[   11.356836][   T11]  process_one_work+0xe55/0x16d0
[   11.356978][   T11]  ? __pfx___lock_release+0x10/0x10
[   11.357103][   T11]  ? __pfx_process_one_work+0x10/0x10
[   11.357246][   T11]  ? assign_work+0x16c/0x240
[   11.357379][   T11]  worker_thread+0x58c/0xce0
[   11.357515][   T11]  ? __pfx_worker_thread+0x10/0x10
[   11.357649][   T11]  kthread+0x28a/0x350
[   11.357753][   T11]  ? __pfx_kthread+0x10/0x10
[   11.357880][   T11]  ret_from_fork+0x31/0x70
[   11.358011][   T11]  ? __pfx_kthread+0x10/0x10
[   11.358139][   T11]  ret_from_fork_asm+0x1a/0x30
[   11.358278][   T11]  </TASK>
[   11.358387][   T11] 
[   11.358467][   T11] Allocated by task 227:
[   11.358577][   T11]  kasan_save_stack+0x24/0x50
[   11.358710][   T11]  kasan_save_track+0x14/0x30
[   11.358836][   T11]  __kasan_slab_alloc+0x59/0x70
[   11.358961][   T11]  kmem_cache_alloc_noprof+0x10b/0x350
[   11.359096][   T11]  copy_net_ns+0xc6/0x340
[   11.359201][   T11]  create_new_namespaces+0x35f/0x920
[   11.359331][   T11]  unshare_nsproxy_namespaces+0x8d/0x130
[   11.359462][   T11]  ksys_unshare+0x2a9/0x660
[   11.359591][   T11]  __x64_sys_unshare+0x31/0x40
[   11.359716][   T11]  do_syscall_64+0xc1/0x1d0
[   11.359843][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   11.360016][   T11] 
[   11.360087][   T11] Freed by task 11:
[   11.360192][   T11]  kasan_save_stack+0x24/0x50
[   11.360321][   T11]  kasan_save_track+0x14/0x30
[   11.360448][   T11]  kasan_save_free_info+0x3b/0x60
[   11.360574][   T11]  __kasan_slab_free+0x38/0x50
[   11.360709][   T11]  kmem_cache_free+0xf8/0x330
[   11.360858][   T11]  cleanup_net+0x5a8/0xa40
[   11.360988][   T11]  process_one_work+0xe55/0x16d0
[   11.361112][   T11]  worker_thread+0x58c/0xce0
[   11.361238][   T11]  kthread+0x28a/0x350
[   11.361344][   T11]  ret_from_fork+0x31/0x70
[   11.361476][   T11]  ret_from_fork_asm+0x1a/0x30
[   11.361606][   T11] 
[   11.361672][   T11] The buggy address belongs to the object at ffff88800b120040
[   11.361672][   T11]  which belongs to the cache net_namespace of size 5696
[   11.362013][   T11] The buggy address is located 184 bytes inside of
[   11.362013][   T11]  freed 5696-byte region [ffff88800b120040, ffff88800b121680)
[   11.362376][   T11] 
[   11.362467][   T11] The buggy address belongs to the physical page:
[   11.362636][   T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b122fc0 pfn:0xb120
[   11.362905][   T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   11.363096][   T11] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   11.363261][   T11] page_type: f5(slab)
[   11.363361][   T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.363583][   T11] raw: ffff88800b122fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.363809][   T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.364036][   T11] head: ffff88800b122fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.364258][   T11] head: 0080000000000003 ffffea00002c4801 ffffffffffffffff 0000000000000000
[   11.364475][   T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   11.364705][   T11] page dumped because: kasan: bad access detected
[   11.364863][   T11] 
[   11.364927][   T11] Memory state around the buggy address:
[   11.365052][   T11]  ffff88800b11ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.365293][   T11]  ffff88800b120000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   11.365470][   T11] >ffff88800b120080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.365695][   T11]                                                                 ^
[   11.365891][   T11]  ffff88800b120100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.366070][   T11]  ffff88800b120180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.366248][   T11] ==================================================================
[   11.366482][   T11] Disabling lock debugging due to kernel taint
[   12.346115][  T227] setsockopt-clos (227) used greatest stack depth: 24296 bytes left