[ 10.766307][ T262] ip (262) used greatest stack depth: 23864 bytes left [ 11.127642][ T67] ================================================================== [ 11.127899][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 11.128116][ T67] Read of size 8 at addr ffff88800cb880f8 by task kworker/u16:1/67 [ 11.128328][ T67] [ 11.128404][ T67] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 11.128616][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.128796][ T67] Workqueue: netns cleanup_net [ 11.128948][ T67] Call Trace: [ 11.129059][ T67] [ 11.129137][ T67] dump_stack_lvl+0x82/0xd0 [ 11.129284][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 11.129462][ T67] ? cleanup_net+0xa5d/0xb90 [ 11.129608][ T67] print_report+0xb4/0x270 [ 11.129745][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 11.129894][ T67] kasan_report+0xbd/0xf0 [ 11.130003][ T67] ? cleanup_net+0xa5d/0xb90 [ 11.130145][ T67] cleanup_net+0xa5d/0xb90 [ 11.130283][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.130434][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 11.130580][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 11.130722][ T67] ? lock_acquire+0x32/0xc0 [ 11.130866][ T67] ? process_one_work+0xe0b/0x16d0 [ 11.131013][ T67] process_one_work+0xe55/0x16d0 [ 11.131153][ T67] ? __pfx___lock_release+0x10/0x10 [ 11.131296][ T67] ? __pfx_process_one_work+0x10/0x10 [ 11.131441][ T67] ? assign_work+0x16c/0x240 [ 11.131580][ T67] worker_thread+0x58c/0xce0 [ 11.131722][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 11.131909][ T67] ? __pfx_worker_thread+0x10/0x10 [ 11.132050][ T67] ? __pfx_worker_thread+0x10/0x10 [ 11.132191][ T67] kthread+0x28a/0x350 [ 11.132298][ T67] ? __pfx_kthread+0x10/0x10 [ 11.132448][ T67] ret_from_fork+0x31/0x70 [ 11.132590][ T67] ? __pfx_kthread+0x10/0x10 [ 11.132731][ T67] ret_from_fork_asm+0x1a/0x30 [ 11.132880][ T67] [ 11.132993][ T67] [ 11.133064][ T67] Allocated by task 253: [ 11.133179][ T67] kasan_save_stack+0x24/0x50 [ 11.133324][ T67] kasan_save_track+0x14/0x30 [ 11.133465][ T67] __kasan_slab_alloc+0x59/0x70 [ 11.133605][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.133751][ T67] copy_net_ns+0xc6/0x540 [ 11.133857][ T67] create_new_namespaces+0x35f/0x920 [ 11.134004][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 11.134144][ T67] ksys_unshare+0x2c4/0x6e0 [ 11.134286][ T67] __x64_sys_unshare+0x31/0x40 [ 11.134425][ T67] do_syscall_64+0xc1/0x1d0 [ 11.134571][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.134748][ T67] [ 11.134816][ T67] Freed by task 67: [ 11.134920][ T67] kasan_save_stack+0x24/0x50 [ 11.135064][ T67] kasan_save_track+0x14/0x30 [ 11.135202][ T67] kasan_save_free_info+0x3b/0x60 [ 11.135340][ T67] __kasan_slab_free+0x38/0x50 [ 11.135479][ T67] kmem_cache_free+0xf8/0x330 [ 11.135618][ T67] cleanup_net+0x5a8/0xb90 [ 11.135763][ T67] process_one_work+0xe55/0x16d0 [ 11.135910][ T67] worker_thread+0x58c/0xce0 [ 11.136052][ T67] kthread+0x28a/0x350 [ 11.136156][ T67] ret_from_fork+0x31/0x70 [ 11.136301][ T67] ret_from_fork_asm+0x1a/0x30 [ 11.136437][ T67] [ 11.136507][ T67] Last potentially related work creation: [ 11.136643][ T67] kasan_save_stack+0x24/0x50 [ 11.136783][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 11.136923][ T67] insert_work+0x34/0x230 [ 11.137025][ T67] __queue_work+0x5fd/0xa40 [ 11.137162][ T67] queue_delayed_work_on+0x8c/0xa0 [ 11.137302][ T67] __inet_insert_ifa+0x751/0xb10 [ 11.137441][ T67] inetdev_event+0xb18/0xcf0 [ 11.137585][ T67] notifier_call_chain+0xcd/0x150 [ 11.137725][ T67] __dev_notify_flags+0xe6/0x250 [ 11.137863][ T67] dev_change_flags+0xec/0x160 [ 11.138004][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 11.138141][ T67] rtnl_newlink+0x6de/0xa80 [ 11.138278][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 11.138416][ T67] netlink_rcv_skb+0x130/0x360 [ 11.138557][ T67] netlink_unicast+0x44b/0x710 [ 11.138697][ T67] netlink_sendmsg+0x723/0xbe0 [ 11.138838][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 11.138975][ T67] ___sys_sendmsg+0xee/0x170 [ 11.139115][ T67] __sys_sendmsg+0x109/0x1a0 [ 11.139252][ T67] do_syscall_64+0xc1/0x1d0 [ 11.139390][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.139565][ T67] [ 11.139638][ T67] The buggy address belongs to the object at ffff88800cb88040 [ 11.139638][ T67] which belongs to the cache net_namespace of size 6528 [ 11.140013][ T67] The buggy address is located 184 bytes inside of [ 11.140013][ T67] freed 6528-byte region [ffff88800cb88040, ffff88800cb899c0) [ 11.140362][ T67] [ 11.140433][ T67] The buggy address belongs to the physical page: [ 11.140605][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800cb8b640 pfn:0xcb88 [ 11.140893][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.141111][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.141289][ T67] page_type: f5(slab) [ 11.141398][ T67] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.141649][ T67] raw: ffff88800cb8b640 0000000000040002 00000001f5000000 0000000000000000 [ 11.141893][ T67] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.142142][ T67] head: ffff88800cb8b640 0000000000040002 00000001f5000000 0000000000000000 [ 11.142390][ T67] head: 0080000000000003 ffffea000032e201 ffffffffffffffff 0000000000000000 [ 11.142637][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.142880][ T67] page dumped because: kasan: bad access detected [ 11.143056][ T67] [ 11.143129][ T67] Memory state around the buggy address: [ 11.143265][ T67] ffff88800cb87f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 11.143474][ T67] ffff88800cb88000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.143683][ T67] >ffff88800cb88080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.143891][ T67] ^ [ 11.144102][ T67] ffff88800cb88100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.144312][ T67] ffff88800cb88180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.144510][ T67] ================================================================== [ 11.144741][ T67] Disabling lock debugging due to kernel taint