[ 11.837573][ T282] ip (282) used greatest stack depth: 24240 bytes left [ 11.926481][ T283] veth0: renamed from veth-rt-1 [ 12.845400][ T292] veth0: renamed from veth-rt-2 [ 16.607666][ T332] ip (332) used greatest stack depth: 23344 bytes left [ 83.299145][ T67] ================================================================== [ 83.299389][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 83.299621][ T67] Read of size 8 at addr ffff88800a6c80f8 by task kworker/u16:1/67 [ 83.299827][ T67] [ 83.299900][ T67] CPU: 1 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 83.300111][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 83.300294][ T67] Workqueue: netns cleanup_net [ 83.300442][ T67] Call Trace: [ 83.300551][ T67] [ 83.300639][ T67] dump_stack_lvl+0x82/0xd0 [ 83.300786][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 83.300963][ T67] ? cleanup_net+0xa5d/0xb90 [ 83.301105][ T67] print_report+0xb4/0x270 [ 83.301254][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 83.301398][ T67] kasan_report+0xbd/0xf0 [ 83.301506][ T67] ? cleanup_net+0xa5d/0xb90 [ 83.301648][ T67] cleanup_net+0xa5d/0xb90 [ 83.301790][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 83.301935][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 83.302082][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 83.302235][ T67] ? lock_acquire+0x32/0xc0 [ 83.302378][ T67] ? process_one_work+0xe0b/0x16d0 [ 83.302520][ T67] process_one_work+0xe55/0x16d0 [ 83.302664][ T67] ? __pfx___lock_release+0x10/0x10 [ 83.302806][ T67] ? __pfx_process_one_work+0x10/0x10 [ 83.302948][ T67] ? assign_work+0x16c/0x240 [ 83.303090][ T67] worker_thread+0x58c/0xce0 [ 83.303230][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 83.303405][ T67] ? __pfx_worker_thread+0x10/0x10 [ 83.303543][ T67] ? __pfx_worker_thread+0x10/0x10 [ 83.303680][ T67] kthread+0x28a/0x350 [ 83.303791][ T67] ? __pfx_kthread+0x10/0x10 [ 83.303932][ T67] ret_from_fork+0x31/0x70 [ 83.304072][ T67] ? __pfx_kthread+0x10/0x10 [ 83.304215][ T67] ret_from_fork_asm+0x1a/0x30 [ 83.304361][ T67] [ 83.304476][ T67] [ 83.304549][ T67] Allocated by task 268: [ 83.304656][ T67] kasan_save_stack+0x24/0x50 [ 83.304800][ T67] kasan_save_track+0x14/0x30 [ 83.304943][ T67] __kasan_slab_alloc+0x59/0x70 [ 83.305084][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 83.305231][ T67] copy_net_ns+0xc6/0x540 [ 83.305336][ T67] create_new_namespaces+0x35f/0x920 [ 83.305478][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 83.305619][ T67] ksys_unshare+0x2c4/0x6e0 [ 83.305762][ T67] __x64_sys_unshare+0x31/0x40 [ 83.305908][ T67] do_syscall_64+0xc1/0x1d0 [ 83.306050][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.306229][ T67] [ 83.306309][ T67] Freed by task 67: [ 83.306417][ T67] kasan_save_stack+0x24/0x50 [ 83.306566][ T67] kasan_save_track+0x14/0x30 [ 83.306710][ T67] kasan_save_free_info+0x3b/0x60 [ 83.306852][ T67] __kasan_slab_free+0x38/0x50 [ 83.306992][ T67] kmem_cache_free+0xf8/0x330 [ 83.307132][ T67] cleanup_net+0x5a8/0xb90 [ 83.307275][ T67] process_one_work+0xe55/0x16d0 [ 83.307416][ T67] worker_thread+0x58c/0xce0 [ 83.307554][ T67] kthread+0x28a/0x350 [ 83.307660][ T67] ret_from_fork+0x31/0x70 [ 83.307803][ T67] ret_from_fork_asm+0x1a/0x30 [ 83.307944][ T67] [ 83.308024][ T67] Last potentially related work creation: [ 83.308170][ T67] kasan_save_stack+0x24/0x50 [ 83.308312][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 83.308455][ T67] insert_work+0x34/0x230 [ 83.308561][ T67] __queue_work+0x5fd/0xa40 [ 83.308704][ T67] queue_delayed_work_on+0x8c/0xa0 [ 83.308845][ T67] __inet_insert_ifa+0x751/0xb10 [ 83.308991][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 83.309133][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 83.309275][ T67] netlink_rcv_skb+0x130/0x360 [ 83.309421][ T67] netlink_unicast+0x44b/0x710 [ 83.309564][ T67] netlink_sendmsg+0x723/0xbe0 [ 83.309706][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 83.309846][ T67] ___sys_sendmsg+0xee/0x170 [ 83.309988][ T67] __sys_sendmsg+0x109/0x1a0 [ 83.310134][ T67] do_syscall_64+0xc1/0x1d0 [ 83.310275][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.310453][ T67] [ 83.310526][ T67] Second to last potentially related work creation: [ 83.310705][ T67] kasan_save_stack+0x24/0x50 [ 83.310850][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 83.310991][ T67] insert_work+0x34/0x230 [ 83.311096][ T67] __queue_work+0x5fd/0xa40 [ 83.311238][ T67] queue_delayed_work_on+0x8c/0xa0 [ 83.311379][ T67] __inet_insert_ifa+0x751/0xb10 [ 83.311520][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 83.311662][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 83.311802][ T67] netlink_rcv_skb+0x130/0x360 [ 83.311941][ T67] netlink_unicast+0x44b/0x710 [ 83.312086][ T67] netlink_sendmsg+0x723/0xbe0 [ 83.312226][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 83.312372][ T67] ___sys_sendmsg+0xee/0x170 [ 83.312515][ T67] __sys_sendmsg+0x109/0x1a0 [ 83.312654][ T67] do_syscall_64+0xc1/0x1d0 [ 83.312793][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.312969][ T67] [ 83.313042][ T67] The buggy address belongs to the object at ffff88800a6c8040 [ 83.313042][ T67] which belongs to the cache net_namespace of size 6528 [ 83.313427][ T67] The buggy address is located 184 bytes inside of [ 83.313427][ T67] freed 6528-byte region [ffff88800a6c8040, ffff88800a6c99c0) [ 83.313765][ T67] [ 83.313839][ T67] The buggy address belongs to the physical page: [ 83.314013][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa6c8 [ 83.314264][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 83.314474][ T67] flags: 0x80000000000040(head|node=0|zone=1) [ 83.314652][ T67] page_type: f5(slab) [ 83.314762][ T67] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 83.315013][ T67] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 83.315261][ T67] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 83.315512][ T67] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 83.315763][ T67] head: 0080000000000003 ffffea000029b201 ffffffffffffffff 0000000000000000 [ 83.316006][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 83.316248][ T67] page dumped because: kasan: bad access detected [ 83.316430][ T67] [ 83.316502][ T67] Memory state around the buggy address: [ 83.316643][ T67] ffff88800a6c7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 83.316851][ T67] ffff88800a6c8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 83.317053][ T67] >ffff88800a6c8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 83.317256][ T67] ^ [ 83.317461][ T67] ffff88800a6c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 83.317666][ T67] ffff88800a6c8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 83.317866][ T67] ================================================================== [ 83.318284][ T67] Disabling lock debugging due to kernel taint