[   12.094845][   T11] ==================================================================
[   12.095183][   T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   12.095395][   T11] Read of size 8 at addr ffff888004e380f8 by task kworker/u16:0/11
[   12.095635][   T11] 
[   12.095713][   T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1
[   12.095943][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.096109][   T11] Workqueue: netns cleanup_net
[   12.096296][   T11] Call Trace:
[   12.096399][   T11]  <TASK>
[   12.096486][   T11]  dump_stack_lvl+0x82/0xd0
[   12.096625][   T11]  print_address_description.constprop.0+0x2c/0x3b0
[   12.096816][   T11]  ? cleanup_net+0x932/0xa40
[   12.096957][   T11]  print_report+0xb4/0x270
[   12.097084][   T11]  ? kasan_addr_to_slab+0x25/0x80
[   12.097241][   T11]  kasan_report+0xbd/0xf0
[   12.097360][   T11]  ? cleanup_net+0x932/0xa40
[   12.097503][   T11]  cleanup_net+0x932/0xa40
[   12.097645][   T11]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   12.097787][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   12.097945][   T11]  ? trace_lock_acquire+0x148/0x1f0
[   12.098109][   T11]  ? lock_acquire+0x32/0xc0
[   12.098249][   T11]  ? process_one_work+0xe0b/0x16d0
[   12.098400][   T11]  process_one_work+0xe55/0x16d0
[   12.098536][   T11]  ? __pfx___lock_release+0x10/0x10
[   12.098670][   T11]  ? __pfx_process_one_work+0x10/0x10
[   12.098825][   T11]  ? assign_work+0x16c/0x240
[   12.098979][   T11]  worker_thread+0x58c/0xce0
[   12.099133][   T11]  ? __pfx_worker_thread+0x10/0x10
[   12.099303][   T11]  kthread+0x28a/0x350
[   12.099438][   T11]  ? __pfx_kthread+0x10/0x10
[   12.099597][   T11]  ret_from_fork+0x31/0x70
[   12.099772][   T11]  ? __pfx_kthread+0x10/0x10
[   12.099927][   T11]  ret_from_fork_asm+0x1a/0x30
[   12.100097][   T11]  </TASK>
[   12.100239][   T11] 
[   12.100324][   T11] Allocated by task 228:
[   12.100424][   T11]  kasan_save_stack+0x24/0x50
[   12.100580][   T11]  kasan_save_track+0x14/0x30
[   12.100740][   T11]  __kasan_slab_alloc+0x59/0x70
[   12.100887][   T11]  kmem_cache_alloc_noprof+0x10b/0x350
[   12.101030][   T11]  copy_net_ns+0xc6/0x340
[   12.101143][   T11]  create_new_namespaces+0x35f/0x920
[   12.101309][   T11]  unshare_nsproxy_namespaces+0x8d/0x130
[   12.101450][   T11]  ksys_unshare+0x2a9/0x660
[   12.101599][   T11]  __x64_sys_unshare+0x31/0x40
[   12.101746][   T11]  do_syscall_64+0xc1/0x1d0
[   12.101877][   T11]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   12.102045][   T11] 
[   12.102112][   T11] Freed by task 11:
[   12.102218][   T11]  kasan_save_stack+0x24/0x50
[   12.102363][   T11]  kasan_save_track+0x14/0x30
[   12.102501][   T11]  kasan_save_free_info+0x3b/0x60
[   12.102630][   T11]  __kasan_slab_free+0x38/0x50
[   12.102757][   T11]  kmem_cache_free+0xf8/0x330
[   12.102891][   T11]  cleanup_net+0x5a8/0xa40
[   12.103035][   T11]  process_one_work+0xe55/0x16d0
[   12.103170][   T11]  worker_thread+0x58c/0xce0
[   12.103316][   T11]  kthread+0x28a/0x350
[   12.103417][   T11]  ret_from_fork+0x31/0x70
[   12.103547][   T11]  ret_from_fork_asm+0x1a/0x30
[   12.103674][   T11] 
[   12.103740][   T11] The buggy address belongs to the object at ffff888004e38040
[   12.103740][   T11]  which belongs to the cache net_namespace of size 5696
[   12.104069][   T11] The buggy address is located 184 bytes inside of
[   12.104069][   T11]  freed 5696-byte region [ffff888004e38040, ffff888004e39680)
[   12.104387][   T11] 
[   12.104453][   T11] The buggy address belongs to the physical page:
[   12.104604][   T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004e3afc0 pfn:0x4e38
[   12.104865][   T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   12.105063][   T11] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   12.105226][   T11] page_type: f5(slab)
[   12.105328][   T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   12.105561][   T11] raw: ffff888004e3afc0 0000000000050002 00000001f5000000 0000000000000000
[   12.105792][   T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   12.106021][   T11] head: ffff888004e3afc0 0000000000050002 00000001f5000000 0000000000000000
[   12.106254][   T11] head: 0080000000000003 ffffea0000138e01 ffffffffffffffff 0000000000000000
[   12.106471][   T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   12.106700][   T11] page dumped because: kasan: bad access detected
[   12.106884][   T11] 
[   12.106959][   T11] Memory state around the buggy address:
[   12.107096][   T11]  ffff888004e37f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   12.107299][   T11]  ffff888004e38000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   12.107482][   T11] >ffff888004e38080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   12.107688][   T11]                                                                 ^
[   12.107883][   T11]  ffff888004e38100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   12.108091][   T11]  ffff888004e38180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   12.108316][   T11] ==================================================================
[   12.108554][   T11] Disabling lock debugging due to kernel taint
[   12.486056][    C2] TCP: request_sock_TCPv6: Possible SYN flooding on port [2001:db8:254::1]:7010. Sending cookies.