[ 10.742234][ T11] ================================================================== [ 10.742461][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 10.742658][ T11] Read of size 8 at addr ffff888005d100f8 by task kworker/u16:0/11 [ 10.742832][ T11] [ 10.742896][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 10.743104][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.743266][ T11] Workqueue: netns cleanup_net [ 10.743402][ T11] Call Trace: [ 10.743502][ T11] [ 10.743573][ T11] dump_stack_lvl+0x82/0xd0 [ 10.743719][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 10.743880][ T11] ? cleanup_net+0x932/0xa40 [ 10.744014][ T11] print_report+0xb4/0x270 [ 10.744162][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 10.744288][ T11] kasan_report+0xbd/0xf0 [ 10.744386][ T11] ? cleanup_net+0x932/0xa40 [ 10.744518][ T11] cleanup_net+0x932/0xa40 [ 10.744648][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 10.744788][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 10.744917][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 10.745046][ T11] ? lock_acquire+0x32/0xc0 [ 10.745184][ T11] ? process_one_work+0xe0b/0x16d0 [ 10.745314][ T11] process_one_work+0xe55/0x16d0 [ 10.745441][ T11] ? __pfx___lock_release+0x10/0x10 [ 10.745576][ T11] ? __pfx_process_one_work+0x10/0x10 [ 10.745708][ T11] ? assign_work+0x16c/0x240 [ 10.745834][ T11] worker_thread+0x58c/0xce0 [ 10.745966][ T11] ? __pfx_worker_thread+0x10/0x10 [ 10.746094][ T11] kthread+0x28a/0x350 [ 10.746203][ T11] ? __pfx_kthread+0x10/0x10 [ 10.746328][ T11] ret_from_fork+0x31/0x70 [ 10.746453][ T11] ? __pfx_kthread+0x10/0x10 [ 10.746593][ T11] ret_from_fork_asm+0x1a/0x30 [ 10.746735][ T11] [ 10.746835][ T11] [ 10.746904][ T11] Allocated by task 227: [ 10.747010][ T11] kasan_save_stack+0x24/0x50 [ 10.747142][ T11] kasan_save_track+0x14/0x30 [ 10.747271][ T11] __kasan_slab_alloc+0x59/0x70 [ 10.747398][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 10.747523][ T11] copy_net_ns+0xc6/0x340 [ 10.747646][ T11] create_new_namespaces+0x35f/0x920 [ 10.747811][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 10.747975][ T11] ksys_unshare+0x2a9/0x660 [ 10.748158][ T11] __x64_sys_unshare+0x31/0x40 [ 10.748304][ T11] do_syscall_64+0xc1/0x1d0 [ 10.748433][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.748626][ T11] [ 10.748723][ T11] Freed by task 11: [ 10.748837][ T11] kasan_save_stack+0x24/0x50 [ 10.749033][ T11] kasan_save_track+0x14/0x30 [ 10.749202][ T11] kasan_save_free_info+0x3b/0x60 [ 10.749374][ T11] __kasan_slab_free+0x38/0x50 [ 10.749573][ T11] kmem_cache_free+0xf8/0x330 [ 10.749757][ T11] cleanup_net+0x5a8/0xa40 [ 10.749953][ T11] process_one_work+0xe55/0x16d0 [ 10.750145][ T11] worker_thread+0x58c/0xce0 [ 10.750335][ T11] kthread+0x28a/0x350 [ 10.750484][ T11] ret_from_fork+0x31/0x70 [ 10.750674][ T11] ret_from_fork_asm+0x1a/0x30 [ 10.750870][ T11] [ 10.750969][ T11] The buggy address belongs to the object at ffff888005d10040 [ 10.750969][ T11] which belongs to the cache net_namespace of size 5696 [ 10.751465][ T11] The buggy address is located 184 bytes inside of [ 10.751465][ T11] freed 5696-byte region [ffff888005d10040, ffff888005d11680) [ 10.751772][ T11] [ 10.751837][ T11] The buggy address belongs to the physical page: [ 10.751989][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888005d12fc0 pfn:0x5d10 [ 10.752268][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 10.752460][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 10.752625][ T11] page_type: f5(slab) [ 10.752731][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.752955][ T11] raw: ffff888005d12fc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.753182][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.753404][ T11] head: ffff888005d12fc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.753620][ T11] head: 0080000000000003 ffffea0000174401 ffffffffffffffff 0000000000000000 [ 10.753832][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 10.754047][ T11] page dumped because: kasan: bad access detected [ 10.754236][ T11] [ 10.754301][ T11] Memory state around the buggy address: [ 10.754425][ T11] ffff888005d0ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.754605][ T11] ffff888005d10000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 10.754783][ T11] >ffff888005d10080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.754979][ T11] ^ [ 10.755188][ T11] ffff888005d10100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.755460][ T11] ffff888005d10180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.755686][ T11] ================================================================== [ 10.756041][ T11] Disabling lock debugging due to kernel taint