[ 11.174097][ T266] ip (266) used greatest stack depth: 24432 bytes left [ 16.232676][ T11] ================================================================== [ 16.232904][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 16.233104][ T11] Read of size 8 at addr ffff888004ed1bf8 by task kworker/u16:0/11 [ 16.233285][ T11] [ 16.233352][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 16.233543][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.233706][ T11] Workqueue: netns cleanup_net [ 16.233840][ T11] Call Trace: [ 16.233949][ T11] [ 16.234019][ T11] dump_stack_lvl+0x82/0xd0 [ 16.234149][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 16.234306][ T11] ? cleanup_net+0xa5d/0xb90 [ 16.234431][ T11] print_report+0xb4/0x270 [ 16.234557][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 16.234681][ T11] kasan_report+0xbd/0xf0 [ 16.234776][ T11] ? cleanup_net+0xa5d/0xb90 [ 16.234902][ T11] cleanup_net+0xa5d/0xb90 [ 16.235027][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 16.235160][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 16.235287][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 16.235414][ T11] ? lock_acquire+0x32/0xc0 [ 16.235543][ T11] ? process_one_work+0xe0b/0x16d0 [ 16.235690][ T11] process_one_work+0xe55/0x16d0 [ 16.235818][ T11] ? __pfx___lock_release+0x10/0x10 [ 16.235947][ T11] ? __pfx_process_one_work+0x10/0x10 [ 16.236076][ T11] ? assign_work+0x16c/0x240 [ 16.236201][ T11] worker_thread+0x58c/0xce0 [ 16.236328][ T11] ? __pfx_worker_thread+0x10/0x10 [ 16.236455][ T11] kthread+0x28a/0x350 [ 16.236553][ T11] ? __pfx_kthread+0x10/0x10 [ 16.236679][ T11] ret_from_fork+0x31/0x70 [ 16.236808][ T11] ? __pfx_kthread+0x10/0x10 [ 16.236934][ T11] ret_from_fork_asm+0x1a/0x30 [ 16.237081][ T11] [ 16.237176][ T11] [ 16.237241][ T11] Allocated by task 257: [ 16.237336][ T11] kasan_save_stack+0x24/0x50 [ 16.237462][ T11] kasan_save_track+0x14/0x30 [ 16.237585][ T11] __kasan_slab_alloc+0x59/0x70 [ 16.237704][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 16.237831][ T11] copy_net_ns+0xc6/0x540 [ 16.237925][ T11] create_new_namespaces+0x35f/0x920 [ 16.238049][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 16.238172][ T11] ksys_unshare+0x2c4/0x6e0 [ 16.238299][ T11] __x64_sys_unshare+0x31/0x40 [ 16.238422][ T11] do_syscall_64+0xc1/0x1d0 [ 16.238548][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.238707][ T11] [ 16.238774][ T11] Freed by task 11: [ 16.238870][ T11] kasan_save_stack+0x24/0x50 [ 16.238996][ T11] kasan_save_track+0x14/0x30 [ 16.239117][ T11] kasan_save_free_info+0x3b/0x60 [ 16.239240][ T11] __kasan_slab_free+0x38/0x50 [ 16.239364][ T11] kmem_cache_free+0xf8/0x330 [ 16.239487][ T11] cleanup_net+0x5a8/0xb90 [ 16.239608][ T11] process_one_work+0xe55/0x16d0 [ 16.239731][ T11] worker_thread+0x58c/0xce0 [ 16.239852][ T11] kthread+0x28a/0x350 [ 16.239948][ T11] ret_from_fork+0x31/0x70 [ 16.240074][ T11] ret_from_fork_asm+0x1a/0x30 [ 16.240197][ T11] [ 16.240264][ T11] Last potentially related work creation: [ 16.240387][ T11] kasan_save_stack+0x24/0x50 [ 16.240515][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 16.240641][ T11] insert_work+0x34/0x230 [ 16.240736][ T11] __queue_work+0x5fd/0xa40 [ 16.240860][ T11] queue_delayed_work_on+0x8c/0xa0 [ 16.241005][ T11] __inet_insert_ifa+0x751/0xb10 [ 16.241135][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 16.241262][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 16.241400][ T11] netlink_rcv_skb+0x130/0x360 [ 16.241533][ T11] netlink_unicast+0x44b/0x710 [ 16.241661][ T11] netlink_sendmsg+0x723/0xbe0 [ 16.241788][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 16.241939][ T11] ___sys_sendmsg+0xee/0x170 [ 16.242069][ T11] __sys_sendmsg+0x109/0x1a0 [ 16.242208][ T11] do_syscall_64+0xc1/0x1d0 [ 16.242334][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.242526][ T11] [ 16.242595][ T11] Second to last potentially related work creation: [ 16.242754][ T11] kasan_save_stack+0x24/0x50 [ 16.242882][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 16.243012][ T11] insert_work+0x34/0x230 [ 16.243113][ T11] __queue_work+0x5fd/0xa40 [ 16.243242][ T11] queue_delayed_work_on+0x8c/0xa0 [ 16.243370][ T11] __inet_insert_ifa+0x751/0xb10 [ 16.243503][ T11] inetdev_event+0xb18/0xcf0 [ 16.243644][ T11] notifier_call_chain+0xcd/0x150 [ 16.243776][ T11] __dev_notify_flags+0xe6/0x250 [ 16.243903][ T11] dev_change_flags+0xec/0x160 [ 16.244032][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 16.244160][ T11] rtnl_newlink+0x6de/0xa80 [ 16.244283][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 16.244411][ T11] netlink_rcv_skb+0x130/0x360 [ 16.244538][ T11] netlink_unicast+0x44b/0x710 [ 16.244664][ T11] netlink_sendmsg+0x723/0xbe0 [ 16.244792][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 16.244918][ T11] ___sys_sendmsg+0xee/0x170 [ 16.245043][ T11] __sys_sendmsg+0x109/0x1a0 [ 16.245171][ T11] do_syscall_64+0xc1/0x1d0 [ 16.245314][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.245481][ T11] [ 16.245547][ T11] The buggy address belongs to the object at ffff888004ed1b40 [ 16.245547][ T11] which belongs to the cache net_namespace of size 6528 [ 16.245887][ T11] The buggy address is located 184 bytes inside of [ 16.245887][ T11] freed 6528-byte region [ffff888004ed1b40, ffff888004ed34c0) [ 16.246195][ T11] [ 16.246260][ T11] The buggy address belongs to the physical page: [ 16.246415][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004ed3640 pfn:0x4ed0 [ 16.246675][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 16.246868][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 16.247030][ T11] page_type: f5(slab) [ 16.247132][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 16.247351][ T11] raw: ffff888004ed3640 0000000000040002 00000001f5000000 0000000000000000 [ 16.247566][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 16.247789][ T11] head: ffff888004ed3640 0000000000040002 00000001f5000000 0000000000000000 [ 16.248007][ T11] head: 0080000000000003 ffffea000013b401 ffffffffffffffff 0000000000000000 [ 16.248230][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 16.248453][ T11] page dumped because: kasan: bad access detected [ 16.248604][ T11] [ 16.248666][ T11] Memory state around the buggy address: [ 16.248790][ T11] ffff888004ed1a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.248971][ T11] ffff888004ed1b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 16.249147][ T11] >ffff888004ed1b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.249328][ T11] ^ [ 16.249511][ T11] ffff888004ed1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.249688][ T11] ffff888004ed1c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.249872][ T11] ================================================================== [ 16.250108][ T11] Disabling lock debugging due to kernel taint